News

Hard rock, as the name suggests, refers to rocks with a harder texture, such as granite, basalt, etc. For the crushing of this type of hard rock, jaw crusher, impact crusher, and cone crusher can often be used. However, from the comparison and analysis of crushing efficiency, finished particle shape, and wear rate, cone crusher is more suitable for the crushing operation of hard rock. The specific introduction of knowledge related to hard rock fragmentation is as follows: 1. Reasons for selecting cone crusher for hard rock crushing 1. Due to the high hardness of hard rock, crushing can cause significant wear and tear to the equipment. The impact crusher adopts the principle of impact crushing, using a high-speed moving plate hammer to impact the material for crushing. The plate hammer is the first to be affected, and the frequency of replacement will be accelerated, which will delay more production time. Choosing a conical crusher is different. It adopts the principle of laminated crushing and utilizes the eccentric movement of the crushing wall to crush the material, greatly reducing wear and tear. Therefore, considering the wear rate alone, conical crushers are more suitable for hard rock crushing than impact crushers; 2. Although the particle shape of hard rock products processed by the cone crusher may not be as good as that of the impact crusher, it has fewer needle like materials and relatively uniform particle size. Furthermore, the cone crusher has high crushing efficiency, so for enterprise users under general production requirements, choosing a cone crusher is still relatively good; 3. From a safety perspective, the cone crusher adopts a spring hydraulic safety device. When there is an unbreakable foreign object in the crushing chamber or the equipment is overloaded, it can automatically increase the discharge port to discharge the foreign object and ensure its safety performance. This is a function that ordinary crushers do not have, so compared to other equipment, the cone crusher is more suitable for hard rock crushing operations. 2. How to achieve hard rock crushing operation with a cone crusher When the cone crusher is working, the rotation of the electric motor is driven by a belt pulley or coupling, a transmission shaft, and a conical part under the force of the eccentric sleeve to rotate and swing around, forcing the crushing wall to approach and deviate from the surface of the rolled white wall fixed on the adjustment sleeve. This way, the ore will be continuously impacted, squeezed, and bent in the crushing chamber, achieving the crushing of the ore. 3. Process flow of hard rock crushing production line Generally speaking, when considering the configuration of hard rock crushing production line equipment, in addition to the core hard rock crushing machinery of cone crusher, some auxiliary crushing equipment such as jaw crusher and sand making machine will also be selected to complete the coarse crushing and shaping operations of hard rock materials. The specific crushing process flow is as follows: first, the hard rock is preliminarily compressed and crushed by a jaw crusher, then transported by a conveyor belt to a cone crusher for processing and crushing. Then, it enters a sand making machine for shaping. If there are high requirements for the finished product, a sand washing machine can also be selected for cleaning and screening the finished sand and stone.

During the operation of a jaw crusher, dust is inevitably generated at the inlet, outlet, and crushing chamber, especially when crushing materials such as limestone, which not only pollutes the environment but also damages the health of workers. Nowadays, environmental control is relatively strict, and how to reduce dust pollution of jaw crushers and achieve more environmental protection is a problem that many people are very concerned about. 1. Reasonable selection of toothed plates When selecting tooth plates, it is necessary to choose a tooth plate with relatively more teeth and a smaller tooth shape, which is beneficial for improving crushing efficiency and reducing dust generation. 2. The tooth plate should be firmly and reliably fixed During the operation of a jaw crusher, frequent impact loads are generated, resulting in frequent collisions and squeezing of ores and toothed plates. It is easy to cause loosening or detachment of fixed and movable toothed plates, especially fixed toothed plates. Once the toothed plate loosens or falls off, it will seriously reduce the crushing efficiency of the crusher, causing the ore to stay in the crushing chamber for a long time, resulting in multiple friction between the ore and the toothed plate and generating a large amount of dust. Therefore, it is necessary to ensure that the tooth plate is fixed reliably, in order to reduce dust generation from the source. Jaw crusher 3. Timely replace the blunt tooth plate When the tooth plate is blunted, it will increase the contact area with the ore, form a larger compacted core, and consume a large amount of crushing power, which also leads to the generation of a large amount of dust. 4. Increase the traction speed of the discharged product appropriately Adjusting the subsequent conveying speed of the discharged product can not only achieve the optimal working state of the crusher, but also achieve the effect of controlling dust. Practice has proven that, while ensuring the bearing range and production capacity of each subsequent process, appropriately increasing the traction speed can reduce the amount of dust secondary lifting. 5. Humidification treatment of materials In order to maintain a relatively stable state of the entire set of dust prevention measures and better control the overall dust concentration, in the actual production process, humidifying the raw ore before entering the crusher can effectively reduce the dust rate generated by the ore during the crushing process

Because the winter temperature is relatively low, it not only greatly reduces the service life of the crusher, but also makes it easier for the oil and water in the crusher to freeze. Therefore, it is best to thoroughly inspect and maintain the crusher before winter to ensure the safety of construction machinery during the winter, so as to avoid problems with the machine that may affect production. The following will provide a detailed introduction to the precautions for maintaining the crusher in winter. 1. Clean the equipment properly Cleaning the exterior of the diesel engine, chassis, and working equipment of the machinery can play a role in removing scale and dirt. However, it is strictly prohibited to use high-pressure and high-temperature water guns to wash areas with high waterproof requirements, especially electrical parts, during the cleaning process to avoid damage. 2. Replace lubricating oil and grease During seasonal maintenance, replace the Gear oil in the transmission, transfer case, differential and steering gear with the Gear oil used in winter, and pay attention to cleaning when changing the oil. 3. Selection of fuel oil Diesel engines should use low-temperature oil with lower viscosity. Try to use high-performance engine oil as much as possible. This type of oil not only does not oxidize easily at high temperatures, but also does not leave sediment in the precise components of the diesel engine, which can greatly extend the lifespan of the diesel engine. Multi grade oil can operate over a wide temperature range, and generally can be selected with viscosity grades of SAE5W-40 or SAE10W-40. At the same time as changing the oil, the oil filter should be replaced or cleaned. 4. Maintenance of the cooling system Maintenance and inspection of the cooling system of the diesel engine. Check the working status of the thermostat to prevent the water temperature of the diesel engine from being too low or too high. Remove scale from the water jacket. To choose a long-term antifreeze solution with a minimum temperature of about 10 ℃ lower than the lowest temperature in the area where construction machinery is used, and with anti freezing properties in winter, anti boiling properties in summer, anti-corrosion properties, and anti fouling properties. Once mud and sand accumulation is found in the water tank, it should be immediately removed. 5. Maintenance of electrical equipment Check the motor wiring of the battery, adjust the electrolyte density, maintain the starting motor, and increase the charging voltage of the generator. In winter, the battery should be regularly charged and the preheating device should be maintained. 6. Maintenance of the braking system Pay attention to whether the brake fluid is sufficient and whether the crushing quality has deteriorated. Check if the oil water separator and drain switch are working properly. Check for signs of weakening, deviation, insufficient pedal force, and non return of the brake pedal, and make timely adjustments.

The impact crusher, abbreviated as impact crusher, is a crushing machine that uses impact energy to crush materials. This equipment adopts new manufacturing technology, structural design, and processed products in cubic shape, without tension and cracks. It has good particle shape and can crush various coarse, medium, and fine materials (granite, limestone, concrete, etc.). It is widely used in various industries such as ore crushing, railways, highways, energy, cement, chemical industry, construction, etc. So, what serious consequences will voltage instability have on the impact crusher during the production process? 1. Sudden shutdown occurs. The voltage in the workplace is unstable or too low. When the main machine of the impact crusher encounters large materials, it is unable to break and stops due to the inability of the main machine to bear excessive pressure. 2. Seize the eccentric shaft. If the working voltage of the impact crusher is unstable, it will cause the eccentric shaft tightening sleeve to loosen or fall off, causing the frame to be close to the bearing, causing the eccentric shaft to be firmly stuck, and the eccentric shaft cannot rotate normally, seriously affecting production progress. Therefore, if such a malfunction occurs in production, the voltage should be adjusted in a timely manner, and the eccentric shaft bushing needs to be re tightened. If the eccentric shaft adapter bushing is damaged, the eccentric shaft adapter bushing needs to be replaced. 3. Causing material blockage. If the working voltage of the impact crusher is unstable, it will lead to uneven feeding during production, with varying amounts of feed. The broken product cannot be discharged in a timely manner, and the material is prone to blockage in the crushing chamber and discharge port. Therefore, it is necessary to ensure a stable working voltage, and regularly check the discharge port to timely remove blocked materials, which can effectively prevent vehicle blockage. 4. Causing traffic congestion. Unstable voltage can lead to high tension of the transmission belt during the operation of the crusher, causing the belt to become too loose, slip, and fail. The belt will lose its function on the transmission bearings and other operating components, and the material will continue to be supplied to the crusher, causing stuffiness.

The jaw crusher is an early type of crushing equipment, which is still widely used in many departments such as mining, smelting, building materials, highways, railways, water conservancy, and chemical industry, due to its simple structure, robustness, reliable operation, easy maintenance and repair, and relatively low production and construction costs. It is favored and loved by many users. However, jaw crushers are often used for coarse crushing work, often in contact with crushing large stones. Many vulnerable parts are prone to wear and tear during work, and need to be replaced in a timely manner. How to determine if jaw crusher components need to be replaced? 1. Replacement of jaw plate The service life of the jaw plate mainly depends on the production time and degree of damage, and the service life and wear degree of different materials are also different. 2. Shaft replacement If the wear of the shaft is minimal, just to repair its geometric shape, it can be turned on a lathe to achieve the correct geometric shape of the journal, and then the bearing inner diameter can be reduced accordingly. But after several such treatments, if the journal size is reduced by 5% compared to the original, it is no longer allowed to be turned and a new shaft should be replaced. 3. Replacement of lining plate The fixed jaw lining plate (tooth plate), movable jaw lining plate (tooth plate), and both side lining plates (guard plate) of the jaw crusher are prone to wear and tear. If the wear is fast, it will affect the product specifications. When the lining plate is initially worn, the lining plate can be turned around for use, or the upper and lower parts can be turned around for use. The wear of the jaw plate is mostly concentrated at the middle and bottom. When the tooth plate is worn out by 3/5, the lining plate needs to be replaced. When the lining plates on both sides are worn out by 2/5, they also need to be replaced. 4. Replacement of bracket When the elbow plate is rapidly worn or broken, it is necessary to first remove the stones in the crushing chamber, remove the worn or broken elbow plate, inspect the movable jaw and the elbow plate on the connecting rod for damage, and then pull the movable jaw to the fixed jaw. After lubricating the working surface of the elbow plate with dry oil, replace it with a new thrust plate, gradually contact it with the working surface of the elbow plate, and tighten the tension rod to make the movable jaw clamp the thrust plate, tighten the safety cover, and connect the lubrication system, Then adjust the size of the discharge port. 5. Replacement of eccentric shaft and bearing box If the eccentric shaft and bearing box are worn and their space exceeds 1.5 times the original installation configuration space, they need to be cushioned for adjustment or replacement; The oil groove is worn by 1.5mm and should be reopened and adjusted; When the space between the upper cover of the connecting rod head and the eccentric shaft is worn to more than 1.5 times the installation configuration space, it also needs to be padded for adjustment or replacement.

The cone crusher mainly includes three systems: mechanical, hydraulic, and lubrication. Its structure is relatively complex, and the manufacturing accuracy of mechanical components is relatively high. It requires good maintenance and upkeep to operate normally for a long time. Below is a detailed introduction to the working principle and maintenance methods of the cone crusher. 1. Introduction to the working principle of cone crusher The main components of the cone crusher include a frame, transmission shaft, eccentric sleeve, spherical bearing, crushing cone, adjustment device, adjustment sleeve, spring, and feeding port. During operation, the electric motor drives the eccentric sleeve to rotate through the transmission device, and the moving cone rotates and swings under the force of the eccentric shaft sleeve. The section where the moving cone is close to the static cone becomes the crushing chamber, and the material is crushed by multiple compressions and impacts of the moving cone and the static cone. When the moving cone leaves the section, the material that has already broken to the required particle size falls under its own gravity and is discharged from the bottom of the cone to complete the crushing operation. 2. Maintenance and repair of the three major systems of cone crusher (1). Mechanical system The gear transmission system and eccentric sleeve bearing device in the mechanical system are the main maintenance objects. The gear transmission system is the core of the equipment, and maintenance mainly involves ensuring that the lubrication system is in good working condition and adjusting the fit clearance between the bevel gear and the large ring gear. The eccentric sleeve device is the main bearing of the equipment, and the sliding mode can provide bearing function and stress function. Under sufficient lubrication conditions, the tapered eccentric sleeve bearing can be used normally for a long time. (2). Hydraulic system The adjustment function of the hydraulic system is strong. In the case of spring cone breakage and multi cylinder cone breakage, the hydraulic system mainly plays a role in cleaning the cavity and protecting the iron. In the case of single cylinder cone crusher, the hydraulic system also plays a role in regulating the discharge port. It is necessary to maintain the hydraulic system of the cone crusher, especially the inspection and maintenance of filter components and sensors. (3). Lubrication system The lubrication system can provide sufficient lubricating oil for the cone crusher, ensuring the safe operation of transmission components under severe stress, and is a crucial auxiliary device. If the lubrication system malfunctions and the linkage safety device fails, it is highly likely to cause destructive damage to the equipment. Additionally. The lubrication system and hydraulic system of cone breaking equipment are usually designed and manufactured as a whole, and the clear boundary between the two cannot be seen from the appearance. However, lubricating fluid and hydraulic oil are two types of fluids and should not be mixed or misused.

The stock price of Deccan Gold Mines Ltd. in India has risen to its highest level since 2008, after the company encountered difficulties in mining locally and subsequently began large-scale global acquisitions. The Deccan stock market rose by over 40% in July, far exceeding the 3.5% increase of the benchmark Standard&Poor's BSE Sensex index. Earlier this month, the only listed gold miner in India acquired shares in Avelum Partners LLC in Kyrgyzstan and Kalevala gold Oy in Finland. Prior to these acquisitions, the company also concluded other transactions in the past year, including the acquisition of a processing plant in cooperation with AK Corp. of the United Arab Emirates, and the acquisition of a mining license for a gold mine in Andhra Pradesh by investing in Indian Geomysore Services. Hanuma Prasad Modali, the general manager, said in an interview that mines in Kyrgyzstan and Andhra Pradesh are expected to be fully put into production from next year. This will start to bring revenue to the company, "he said, adding that Finnish assets will take another three years. He said that Deccan plans to raise about $20 million from institutional investors and High-net-worth individual in the next 12 months, adding that the company is also willing to sell some equity. Since its establishment in 2003, the Deccan has only pilot mined a few kilograms of gold in India. The company's progress in obtaining state level mining permits has been slow, and after its exploration permit was cancelled by the government, the company went through legal proceedings. Modali said that frequent changes in mining policies have always been a key challenge for India, hindering investment by multinational corporations such as Rio Tinto Group. He urged the government to develop separate policies for precious metals. He said that Deccan is still exploring some small projects in Tanzania, but further acquisitions will only be considered after the production of existing assets begins.

On July 20th, foreign media reported that Chile is the world's largest copper mining country and is promoting a strategy to expand its local copper processing capacity to reduce dependence on Asian smelters and make shipping cleaner. The Ministry of Mines said on Thursday that it has submitted a plan to Congress to upgrade existing smelters and refineries, and to collaborate with the private sector to develop new factories. Strengthening smelting capacity is the top priority of the left-wing government led by President Gabriel Boric. The government also hopes to gain more value in converting lithium into battery chemicals. More than half of Chile's copper production is shipped out in the form of semi-finished products, with the last smelter built in 1990. More local smelting will reduce waste caused by exporting concentrates and improve traceability. The new generation of smelters is also cleaner. The proposal was formulated after negotiations with workers, businesses, and academia, after the state-owned mining company Codelco decided to close its Vitanas smelter for environmental reasons. The agreement establishes the leading role of the Chilean government in developing new production capacity through Codelco and another state-owned enterprise, Enami. There are currently 6 smelters in Chile, of which 4 are state-owned. In January of this year, Codelco signed an agreement with Aurubis, a top European smelter, to explore potential areas of cooperation for smelting and circular economy projects in Chile. Enami is researching a project to upgrade the Hernan Videla Lira smelter.

On July 20, foreign media reported that the President of President of Bolivia said on Thursday that Bolivia's lithium resources are currently estimated at 23 million tons, and previous government studies have further consolidated the South American country's position as a global leader in lithium resources. The new data is based on the exploration of over 66 wells in the Coipasa and Pastos Grandes salt flats, compared to the previous estimate of 21 million tons. President Luis Arce told reporters that the government has also begun negotiations with EU representatives on investment in lithium projects. All eyes are focused on Latin America and Bolivia because we have abundant lithium and strategic minerals, "Arce said, adding that at a summit with EU representatives in Brussels earlier this week, there was interest not only in lithium, but also in other minerals and metals in Bolivia. The country also mines metals such as silver, zinc, lead, and tin. Bolivia has previously sought investment from Russian and Chinese companies to develop its vast but largely untapped lithium resources. In the first half of this year, the company signed three lithium agreements with two Chinese companies and a Russian company, promising to invest $2.8 billion to industrialize Bolivia's resources. This white metal is a key component of electric vehicle batteries. In recent years, as car manufacturers have abandoned the production of internal combustion engine vehicles to comply with stricter regulations aimed at curbing climate change, the price of this metal has skyrocketed. The United States Geological Survey (USGS) estimates that the so-called "lithium triangle" in South America has more than half of the world's lithium resources. However, Bolivia's reserves exceed those of its neighboring Argentina and Chile, estimated at 20 million tons and 11 million tons respectively.

The counterattack device usually comes with a discharge gap adjustment mechanism. By adjusting the discharge gap, the number of impacts on the material can be changed, thereby affecting the composition of product particle size to varying degrees. The dual rotor impact crusher needs to be adjusted appropriately due to the requirements of product particle size or the wear of components such as the plate hammer, mainly adjusting the gap between the cavity impact plate, the second impact plate, and the uniform sieve plate and the end point of the plate hammer. The first impact plate is used to coordinate with the adjustment of the split cavity impact plate, in order to maintain an approximate arc shaped impact crusher. When adjusting the split cavity impact plate, twisting the positioning nut can change the gap with the end point of the rotor plate hammer. When adjusting the gap, the spring pre-stress must be adjusted accordingly. The adjustment of the clearance between the endpoints of the second impact plate, uniform sieve plate, and second rotor plate hammer is achieved by adjusting the corresponding springs. Reasons for Excessive Discharge of the Impact Crusher Advantages of impact crusher: 1. Excessive wear on the hammer or counterattack lining plate. Causing excessive clearance between the hammer and the impact lining plate, resulting in excessive discharge particles. At this point, we need to promptly inspect and replace the replacement hammer or impact lining plate. 2. Excessive feed size is also a reason. When the particle size and flow rate of the feed are both large, it will cause the crushing chamber of the impact crusher to form a full load phenomenon. At this time, it is easy for the material to be discharged from the discharge port before being fully crushed in the crushing chamber, resulting in excessive discharge particles. Users should choose the appropriate feed particle size based on the actual situation. 3. Material is a major factor affecting the particle size of the counterattack discharge. The increase in discharge particle size is due to the material being too wet. The solution is to equip heating devices in the feed chute and impact plate parts of the impact crusher. Daily maintenance of impact crusher 1. The operation point of the impact crusher is stable. When the vibration of the machine suddenly increases, it should be stopped immediately to identify the cause and eliminate it. 2. When the wear of the hammer reaches the limit mark, it should be turned around or replaced in a timely manner. 3. Before starting each machine, it is necessary to check the fastening status of all bolts. 4. After assembling or replacing the plate hammer, the rotor must be kept balanced, and the static balance must not exceed 0.25kg/m 5. Under normal circumstances, the length of the bearing should not exceed 35 degrees, and the newer temperature should not exceed 70 degrees. If it exceeds 70 degrees, it should be stopped immediately to identify the cause. 6. When the frame liner is worn, it should be replaced in a timely manner to avoid wearing the casing.

According to MiningWeekly's Reuters report, Indonesia has introduced new regulations to increase the export tax rate of copper concentrate from 5% to 10%. The Indonesian government is urging mining companies to conduct mineral processing locally rather than exporting raw ore. Raising export taxes is one of the measures taken by the Indonesian government to promote the construction of domestic refineries, with the aim of expanding domestic processing to obtain more benefits from mineral resources. In June, the country also banned the export of raw ore. However, the Indonesian government stipulates that if several companies with refinery construction progress exceeding 50% are willing to pay export taxes, they can continue exporting concentrates until mid-2024. The faster the refinery progresses, the lower its export tax rate. According to the new regulations announced by the Indonesian Ministry of Finance, the export tax rate for copper mining enterprises with a construction progress of more than 50% but less than 70% is 10%, the tax rate for copper mining enterprises with a progress of more than 70% but less than 90% is 7.5%, and the tax rate for copper mining enterprises with a progress of more than 90% is 5%. Previously, copper mining companies were required to pay a maximum export tax rate of 5%. According to the new regulations, the export tax rate of iron, lead, and zinc concentrates will be increased to 2.5% -7.5% according to the above progress classification standards. The new export tax rate is valid from July 17th to December 2023, and may be raised again in January 2024. According to regulations, from January 2024 to May 31, 2024, according to the progress of refinery construction, the export tax rate of copper concentrate will increase to 7.5% -15%, while the export tax rate of iron, zinc, and lead concentrate will increase to 5% -10%.

The impact crusher is often used as a secondary medium and fine crushing equipment. Currently, the coarse crushing configuration of the sand and gravel production line can choose counterattack crusher instead of jaw crusher, and the medium and fine crushing can choose counterattack crusher. So, what are the advantages of counterattack compared to other crushing equipment? The editor will introduce it to everyone. The advantage of impact crusher 1. Able to handle materials with high moisture content. 2. The wear of vulnerable parts is smaller than that of hammer crushers. The metal utilization rate of the impact crusher plate hammer can reach as high as 45% -48%. 3. Convenient maintenance and repair operations. 4. The adjustment of discharge particle size is convenient and flexible. The impact crusher can adjust the discharge particle size by adjusting the rotor speed, adjusting the gap between the impact plate and the grinding chamber, and other methods. 5. Suitable for a wide range of hardness. The impact crusher can not only crush materials with low hardness, but also effectively crush other medium hard ores such as iron ore, sandstone, gypsum, coal gangue, lump coal, etc. Production Line Applications Processing material: coal gangue Production capacity: 300T/H Feed particle size: 0-350mm Discharge particle size: 0-13mm

Although granite has high hardness, it has a certain degree of brittleness, so the selection of crushing equipment for granite is relatively flexible. Granite can be used as a basic sand and stone material in the construction industry after undergoing certain crushing and sand making processing. Granite is currently a commonly used sand and stone material in the market, and granite artificial sand replaces natural sand and stone in the market with high quality and excellent particle size. With the widespread application of granite artificial sand in the industry, granite crushing and sand making equipment is receiving increasing attention. Granite can be crushed. However, due to the high hardness of granite, when crushing granite, the equipment loss of the crusher is generally large, which is prone to malfunctions. Therefore, it is necessary to choose a crusher equipment with good performance and configuration. The main characteristics of a good granite crushing equipment are high wear resistance, reasonable structural design, low failure rate, and good particle shape. Due to the continuous progress and development of technology, the types of crushing equipment on the market are becoming more and more complete, and their applications in the industry are gradually expanding. Common equipment includes PE series jaw crushers, HCC hydraulic cone crushers, PF series impact crushers, fine crushers, and so on. These equipment are also used for the crushing and processing of granite. However, with the continuous changes in the market, people's requirements for artificial sand are gradually increasing, Traditional equipment is no longer able to meet production needs. For the application of granite in different fields and different processing requirements, different crushing schemes can be selected. If the customer's market does not have high requirements for the particle size of the finished stone, a two-stage jaw breaking plan can be used for production, which is economically suitable among all plans. If users have high requirements for the particle size of stone, they can choose to use a process configuration of jaw crusher and impact crusher. If users require excellent particle size of the product while reducing production costs, then we need to add a laminated crusher between the jaw crusher and the impact crusher, such as using a fine jaw crusher or a cone crusher. In short, users can choose different crushing schemes based on their processing needs to achieve maximum economic benefits.

Gordes 50 announced that it has seen large-scale high-grade gold mineralization in the Golconda project in Arizona, which indicates that there is a large deposit in the deep. The wide spacing drilling completed in April revealed a deposit of 35 meters at a depth of 177 meters, with a gold grade of 5.2 grams per ton and a silver grade of 5.9 grams per ton. This includes mineralization with a thickness of 9 meters, a gold grade of 19.6 grams per ton, and a silver grade of 17.8 grams per ton. The final ore body did not penetrate. Another borehole under the old mining project revealed 11 meters of gold at a depth of 61 meters, with a gold grade of 1.2 grams per ton, silver at 399 grams per ton, copper at 0.31%, and zinc at 0.55%. The company's preliminary plan aims to better understand the ore control structures and link the main structures with high grade. Limited drilling range of 250 meters × 1500 meters, with the development of alteration, quartz veins, and sulfides. These 12 holes are the results of the first modern systematic exploration of the Gorkonda old mining site and the first new discovery in decades. Before 1917, the mine was mined to a depth of 500 meters, but due to a fire that destroyed the infrastructure, it was later used as a temporary storage site. The mine was originally a base metal mine, and gold and silver were by-products. However, the company's model shows that precious metals are mostly found in veins running north and south, and have not been taken as targets, and preliminary drilling confirmed this model. The company stated that there is still a lot of work to be done at the mine, but currently there are only two diamond drills and 12 reverse circulation drills. Based on the collected data, the company will conduct research on the relationship between gold and iron bearing minerals, and determine a second drilling plan in the fourth quarter.

The shares of Newcrest Mining Ltd, Australia's largest gold miner, fell 5.4% on Friday, the biggest intraday drop in nearly 10 months, after Newmont Corp, a potential buyer of the company, announced a weaker than expected second quarter profit overnight. Newcrest is being acquired by Newmont for A $26.2 billion (US $17.75 billion). As of 0506 Greenwich Mean Time, its share price fell 5.2% to A $26.20, the lowest level since July 7. Sign up for Copper Digest Newcrest was one of the biggest losers in the ASX 200 Index, which fell 0.2%. About 2.9 million shares of Newcrest changed hands, higher than the 30 day average of 2.4 million shares. Due to declining production and rising costs, Newmont, the world's largest gold miner, failed to meet its profit forecast for the second quarter. The company also withdrew its annual outlook for its Penasquito mine in Mexico due to the strike, which resulted in operations still being suspended. The Denver, Colorado based gold mining company said it expects costs to improve for the rest of this year.

The Ministry of Energy and Mines of Ecuador announced in a statement on Thursday that the Ecuadorian government has ended negotiations with Mining in Australia mining company SolGold to develop a large mine, which will require an investment of 4.9 billion dollars in the whole life cycle of the project. The statement added that the underground Cascabel mine is expected to generate $35 billion in exports and attract approximately $8 billion in royalties and taxes to the national treasury during its operation period. SolGold stated that the reserve estimate is based on the initial 26 year operating life of the project and an annual production capacity of 25 million metric tons of a processing plant. Kaskabel is located in Imbabura Province Province in the north of Andean countries. The Ministry has previously said that it may become the world's largest silver mine, the third largest gold mine and the sixth largest copper mine. Although Ecuador has abundant mineral reserves, it lags far behind the South American mining giants Peru and Chile, mainly due to resistance from indigenous communities and court rulings that hinder mining activities. The department stated that the agreement was signed on Wednesday, and according to the department's statement, SolGold promised to invest $4.882 billion over the lifespan of Cascabel. Minister Fernando Santos stated that the agreement with SolGold will "make Ecuador an important copper producing and exporting country" and stated that the project has obtained all necessary environmental and water permits. According to company data, Cascabel's initial mineral reserves are estimated to be 3.3 million metric tons of copper, 9.4 million ounces of gold, and 30 million ounces of silver. The department added that the mine is expected to start construction in 2025 and operation in 2030. Official data shows that Ecuador exported approximately $2.8 billion in mining output last year, an increase of nearly one-third compared to the previous year. The country's Fruta del Norte and Mirador mines, as well as small-scale mining activities, are listed as the main contributors.

Recently, China CMH Consortium (consisting of MCC International Engineering Group Co., Ltd., Sinohydro Power International Co., Ltd. and Hunan Shengshi Sunshine Technology Co., Ltd.) and Algerian National Iron and Steel Corporation signed a cooperation agreement in Tindouf Province Province, Algeria, clearly establishing two joint ventures, namely, mining company and steel company, as the main body of iron ore mining and downstream steel smelting, Integrated development of mining and metallurgy at Galajebilet Iron Mine. It is reported that after more than two years of in-depth research and demonstration of the development plan and process technology, both parties have decided to officially launch the project. This signing marks the substantive stage of the development of the iron mine. The Galajebilet iron ore has an average natural iron grade of 53% and reserves of up to 3.5 billion tons. However, due to the limitations of beneficiation and dephosphorization technology, the iron ore has been in a "dormant" state. Since the 1960s, multiple mining companies have attempted to develop it, but they have failed, resulting in most people determining that this iron ore does not have development value. The development plan proposed by the CMH consortium this time, Instead of the traditional idea of "beneficiation and dephosphorization", there is no separate beneficiation link, and the process path can be summarized as follows: hydrogen based reduction is used to turn the raw ore into Direct reduced iron, then melting dephosphorization is carried out to smelt qualified molten iron, and then conventional steelmaking and rolling processes are carried out. Because of the low price of industrial natural gas in Algeria, the cost of raw materials and fuels for smelting 1 ton of steel is less than 100 yuan, making the mine adopt the "integration of beneficiation and metallurgy" The technical solution has an economically feasible foundation. Subsequently, the CMH consortium cooperated with the State Key Laboratory of New Technologies for Iron and Steel Metallurgy of University of Science and Technology Beijing. On the one hand, conduct more in-depth research on the dephosphorization metallurgical process, further verify the technical feasibility of the "hydrogen based reduction+melting separation dephosphorization" process for high phosphorus iron ore, and improve the process flow; On the other hand, with foreign R&D teams as the main design team, domestic teams are responsible for component manufacturing, accessory selection, and specific engineering implementation. They jointly tackle the complete set of equipment for "hydrogen based reduction+melting and dephosphorization", and have invested in the construction of a pilot base in Shanxi. On April 12, 2023, the "Feasibility Review Meeting on Hydrogen Reduction Smelting Dephosphorization Technology of High Phosphorus Iron Ore" was held in Beijing. The review team composed of experts from China Steel Research Institute, Chinese Academy of Sciences, China Mining and Metallurgy Group, Tsinghua University and China Mining Federation unanimously recognized that the technology is feasible and economically feasible in areas where low-cost natural gas or coal based raw gas can be obtained. Subsequently, the successful pilot test of the core equipment cleared the final obstacle to the industrial application of the "hydrogen based reduction+melt separation dephosphorization" metallurgical technology. At present, the development of the Galajebilet iron mine has been listed as one of the three most important economic infrastructure structural projects in Algeria. Hydrogen metallurgy technology, with core patents and proprietary dephosphorization metallurgical equipment from China, has played an important role in promoting project progress.

Lipari Company of Canada plans to use tunnels with a depth of 450 meters for mining. The largest diamond producer in Brazil plans to enter its second operational phase. In order to extend the service life of the deposit it began mining in mid-2016, Lipari is preparing to build the first underground diamond mine in Brazil. According to preliminary predictions, the depth of the tunnel can reach 450 meters, and the required investment may reach 10 million US dollars. Lipari has previously broken the Brazilian diamond production model and started commercial production at Bra ú na Mine 3 in Bahia. Prior to this, there had never been an industrial scale diamond mine in Brazil. Since the beginning of the 18th century, the exploitation of this gem has been carried out in the shallow layer, that is, the Alluvium of the river bed or the ground excavation layer. Different from the mining of Alluvium, diamonds in Bolaouna mine are mined from kimberlito. Kimberlite is a conical underground geological structure through which some diamonds formed at depths are brought to the surface. Diamond mines around the world mine kimberlite because they may have more gemstones than alluvial deposits. Over the years, this Lipari open-pit mine located in the rural area of Nordestina, a semi-arid area in Bahia, has been deepening its excavation depth. The current depth of the mine has reached 250 meters. According to Canadian geologist Kenneth Johnson, who is responsible for the company, this is one of the deepest open-pit mines in Brazil. In six years of mining activities, Lipari has produced 1.1 million carats of diamonds in Nordestina. But now the mine has reached its mining limit. Johnson said, "The open-pit mining activity has ended, and we have reached the limit of mining." The final mining completion work will be carried out in July. Now, the cost of continuing to produce as an open-pit mine will be very high because it is already too deep Moving from the current mining structure to the underground mining structure allows for entry into more and deeper areas for mining, which can offset operating costs. The geologist introduced, "This is the only way we can continue mining and economically feasible, and this transition to underground mining is a normal operation." He also cited open-pit mines in Canada and South Africa as examples of this transformation process. We are likely to dig down another 200 meters, which ultimately depends on the economic situation If the transformation is truly successful, it will be the first underground diamond mine with industrial scale in Brazil's three centuries of diamond mining. This will allow the Boraouna 3 Kimberley Mine to operate for another three to four years, and according to the company's report, this deposit is the largest of the 22 deposits owned in the entire Bahia region. Since its inception, Lipari has become a leader in diamond production in Brazil. In 2017 and 2018, the total output of legally mined diamonds nationwide was about 250000 carats per year, while the output of Lipari reached 230900 carats and 204800 carats respectively. In 2021, the output of Lipari will be 134900 carats, while the national output will be 143000 carats. From 2016 to the first quarter of 2023, the company's total diamond production and export revenue reached $200.4 million. In terms of quantity, Brazil is a small producer in the world diamond market. But Brazil is a producer of special colored diamonds, and rare diamonds are occasionally discovered. Recently, a pink diamond mined in Minas Gerais in 2007 was auctioned in Geneva, and was purchased by an Asian collector for US $28.8 million. But in terms of quantity, Brazil is not outstanding. Over the years, the largest diamond producers have been Russia, Botswana, Canada, the Democratic Republic of the Congo and Australia. According to global total data in 2021, Russia produced 39.1 million carats of diamonds, far ahead of major producing countries. Diamonds mined by Lipari are cut, polished and sold in Antu é rpia, Dubai and India. These three places are the global centers of the diamond industry. Johnson pointed out that the underground mine transition project is expected to consume up to $10 million in funds, and the company has included this project in its plan with a total investment of $25 million. In addition to the Boraouna mine located in Nordstina, the company also hopes to carry out a diamond project in Angola and another project in Canada through capital operations. Lipari has hired ERG Securities Co., Ltd., a subsidiary of ERG Capital Partnership of Eden Rock Group in the UK, to raise $25 million. ERG has offices in Toronto, New York, and London, and is an investment bank that specializes in raising funds for the expansion of small and medium-sized companies. The project began to be promoted to investors in early May, and according to Johnson, some institutions and strategic investors are very interested in the project. We hope to complete the financing around next month In addition, Lipari is working with another company to become one of the companies listed on the Toronto TSX Venture Exchange. This transaction is expected to be completed at the beginning of the third quarter. Johnson is unwilling to make predictions about the start time. But he said that once the funds are in place and permission is obtained, the company will immediately begin transformation work. Although it has not yet been officially determined, the company said that it has submitted its intention to transform an open pit mine into an underground mine to the National Mining Administration and the Institute of Environment and Water Resources (Inema) in Bahia. Eric Bruno, director of the mineral resources department of Lipari Company, disclosed that "we are preparing relevant documents for the official transformation in relevant institutions."

On Friday, a spokesperson for Australian Finance Minister Jim Chalmers stated that under the recommendation of the Australian Foreign Investment Review Board (FIRB), Australia has prohibited a company associated with China from acquiring financially troubled lithium miner Alita Resources Ltd. Australia supplies about half of the world's lithium and other minerals, including rare earths used in electric vehicles and defense batteries. As the world promotes supply chain diversification and distancing itself from the dominant producer China, China is seeking to promote trade with the United States and its allies. Sign up for Battery Metal Digest This is the second time this year that the board of directors has decided to block China's investment in key minerals. Chalmers has issued a restraining order to prevent Austroid Corporation from acquiring an additional 90.10% stake in lithium miner Alita Resources, which will bring its shareholding to 100%. A prohibition notice shows that Austroid Australia, a local subsidiary of Austroid headquartered in the United States, is also prohibited from fully acquiring Alita. According to company documents, the director of Austroid Australia is a Chinese citizen with experience in the mining industry in China. Alita has been under management since 2019. Austroid stated in a statement that it is "shocked and disappointed" by the decision to block the acquisition transaction of converting debt into equity, and stated that it has not fully understood the impact on the operation of the Bald Hill lithium mine exported to China. Austroid stated that after appointing management personnel in 2019, the company has invested a significant amount of funds in Bald Hill, enabling it to restart operations in 2022. Alita's manager, McGrath Nicol, stated in a notice to shareholders on Wednesday that Austroid has withdrawn its application to the FIRB board of directors and intends to submit a new application. Chalmer's office refused to disclose whether the acquisition was blocked due to national interests. The file shows that the director of Austroid Company is Mike Que. He is the son of Kui Wenbin from China, who has a significant interest in the Chinese lithium battery manufacturer Sichuan Western Resources Company. Mike Que is also the sole director of China Hydrogen Energy Limited (CHEL), a Cayman Islands company, whose documents indicate that the company was unable to obtain FIRB approval for its attempt to acquire Alita in 2019. Beijing has previously criticized Australia for blocking Chinese investment on national security grounds. After meeting with Foreign relations of Australia's Foreign Minister Huang Peini last week, Wang Yi, China's top diplomat, said that Australia should provide a "non discriminatory business environment" for Chinese enterprises to invest in Australia. A report from the Ministry of Finance in July showed that in the first quarter of 2023, China withdrew from Australia's top ten sources of foreign investment. Chalmers this week called for more progress in China's lifting of trade restrictions on Australian exports before Prime Minister of Australia Anthony Albanese plans to visit Beijing.

The Colombian government has released a draft decree aimed at establishing new standards for temporary nature reserves based on mining and environmental regulations. The draft decree was issued by the Ministry of Environment in accordance with the ruling of the State Council and other decisions of the Constitutional Court. Citizens, companies, associations and other entities can comment on it. The Constitutional Court ordered the Gustavo Petro government to implement a mining restructuring plan to protect the country's ecosystem. In a video statement released on social media by Susanna Muhammad, the Minister of Environment of Colombia, said that, specifically, the decree was issued in accordance with a ruling of the State Council on August 22, 2023, which requires the Ministry of Mines and Energy to work with the Ministry of Environment to correct "the large-scale mining chaos caused by previous governments" According to Muhammad, Colombia has granted hundreds of mining rights without considering environmental and ecosystem factors. Therefore, the ruling of the State Council ordered relevant ministries to take concerted action to establish temporary protected areas while properly planning and establishing long-term nature reserves. The idea of establishing temporary protected areas is not new as it was included in the Natural Resources Act of 1974 and implemented in previous occasions. The goal is to prevent mining authorities from continuing to issue mining rights in fragile ecosystems, "said the minister. However, the new law will never infringe upon existing rights. For example, a mining company that already has a mining license, work plan, franchise rights, and operates responsibly and complies with all legal requirements will be allowed to continue doing so Muhammad pointed out that the new regulations will be strictly implemented, guided by the principle that natural reserves and ecological services are crucial for national development. She said, "In the context of climate change, without water and environmental capabilities, there is no future for the economy. As a government, part of our responsibility is to organize our territory to ensure responsible growth As early as May, Irene V é lez, the Minister of Mines and Energy of Colombia, expressed in a similar tone that a new mining policy being discussed by the government would consider restructuring the country's development areas around water resource protection.