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Copper is expensive to mine and refine. The high costs of financing a major mine are reflected in the fact that many of the mines with the most production capacity are either state-owned or owned by major mining corporations like BHP and Freeport-McMoRan.
The list below is compiled from the International Copper Study Group's World Copper Factbook 2019. Beside each mine's name is the country that it is located in and its annual production capacity in metric kilotons. A metric ton is equal to about 2,200 pounds. A metric kiloton (kt) is 1,000 metric tons.
The Escondida copper mine in Chile's Atacama desert is jointly owned by BHP (57.5%), Rio Tinto Corp. (30%), and Japan Escondida (12.5%). In 2012, the massive Escondida mine accounted for 5% of total global copper mine production.1 Gold and silver are extracted as by-products from the ore.
Chile's second-largest copper mine, Collahuasi, is owned by a consortium of Anglo American (44%), Glencore (44%), Mitsui (8.4%), and JX Holdings (3.6%). Collahuasi mine produces copper concentrate and cathodes as well as molybdenum concentrate.2
The Morenci mine in Arizona is the largest copper mine in North America. Operated by Freeport-McMoRan, the mine is jointly owned by the company (72%) and affiliates of the Sumitomo Corporation (28%). Morenci operations began in 1872, underground mining began in 1881, and open-pit mining began in 1937.3
Industrial factory price for pepper milling spice mill/powder crushing grains grinder/sugar salt grinding machine 1.Application: The machine is widely applied for the material crushing by the industries of pharmaceutics, chemical and foodstuff, etc. 2.Characteristics: The crushing chamber is equipped with wind wheel type high~speed rotating cutters, so that the airflow in the chamber is strong enough to eliminate any heat in the chamber. 3 Working Method: The machine uses the wind wheel type high~speed rotating cutters and the fixed cutters to crush, mill and shear raw material, which is accompanied by strong airflow inside of the chamber to bring out the heat with the finished products through the screen
A ccording to the processing requirement to set the rotation speed and alternate time of forward and reversal rotation and set the total grinding time. 6.It can solute the problems for the deposition and sticking of some materials and four samples could be obtained with different sizes in one experiment. The main business is the R&D, production and sale of experimental equipment and related technical consultation services
It's the ideal equipment for grinding and dispersion of solid and liquid phase suspending system. The equipment is very economical in needs of grinding and dispersion medium. It can set up the optimum grinding and dispersion strength according to the viscosity of material to assure the best grinding and dispersion quality
The most common way is to put mercury in the wet pan mill, and mix the gold particle with the mercury, which is called Amalgamation. Then the mixture of gold and mercury can be put into crucible for high temperature heating. Because we are factory, so we can guarantee the machine quality and we can give you very low factory price without extra agent cost
4.The machine has a strong material applicability , which suits for many kinds of material whose Moh’s hardness is less than 9.3. They are discharged at the discharging valve to become finished products;the airflow is sucked to the blower by return pipe on the top of cyclone collector. The whole airflow system is a sealed circulation, and is circulated under positive and negative air pressure
The particle size of finished product can be adjusted from 80 to 425 meshes at random and the particle size of part materials can reach 2000 meshes at the maximum. 4. Fatures of YUHONG ISO9001 Appoved Raymond Roller Mill Machine, Raymond Grinding Mill, Raymond Fine Mill (1)Ultra Fine Raymond Mill Advantages: 1.Compared with other raymond mill, the output can increase 10-20% under the same condition. Winnowing process: After grinding the material, the fan will blow the air inward the main case, blowing the powder and being classified by the analyzer above the grinding chamber
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