With the  continuous copper ore mining, there is fewer and fewer high-grade copper ore, and  copper ore block size is getting smaller and more complex. Ordinary flotation  process seems not available for those ore. At this time, "poor, fine,  miscellaneous" copper ore dressing process - the biological leaching  process was born. The following is a brief introduction of biological leaching  of copper production line.

Common  microbe mineral processing technology are heap leaching and leaching. Heap  leaching means to heap mined ore, and then use microbe leaching solution. Due  to its production cost is low and less pollution, it has been widely used. Situ  leaching is to use a chemical solvent or microbial leaching solution to inject  underground mines copper and dissolve copper and other valuable metals, then  collect the dissolved rich liquid. This kind of processing method is the  combination of mining and mineral processing, and there is no need to ship the  ore out the ground which reduce the cost of building dressing plant and eliminating  plant. What’s more, it has less vegetation destruction and pollution, but this  technique is not mature, and there is almost no application in today's  production practice.

Zijinshan  Copper Mine is a large copper factory, and its copper reserves about 146  million tons.  The copper grade is 0.63%,  and arsenic is 0.03%. Due to the raw ore has low copper grade and  high arsenic, the investment of traditional  flotation of copper smelting is too large, the cost is too high, the pollution  is serious and so on. From 2000 to 2004, the plant uses reasonable microbial  selected copper production line and got district benefit. In addition the  Dexing Copper Mine in Jiangxi Province heap leaching plant, under the condition  of more than 90% of primary chalcopyrite and containing copper waste rock grade  0.09%, effectively realized the bacterial leaching of copper extraction.

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• PRE

  Gold Tailing Disposal Technology

  Gold tailing disposal is important in the mining processing, while gold  tailing dam is the important part in mining processing plant. Traditional gold  tailing dam is a great threat to resident nearby. There are some ways to  prevent threat from gold tailing.

• NEX

  Introduction to Flotation of Nonferrous Metal

  In the nature,  sulfide ores at the upper part of the nonferrous metal deposit after long term  weathering (such as the role of oxygen and ions in the air or water) will form  the Oxidized ore zone that is to say the Oxide mineral or mineral containing  oxygen. The content of the oxidized ore differs with the oxidation depth. The  ore can be divided into three types that are Oxide ore (commonly known as oxide  ore), sulfide ore (commonly known as sulfide ore), mixed ore (commonly known as  mixed ore) by the ore oxidation rate which means the mass fraction of a metal  in the presence of an oxide mineral and containing mineral oxygen. Generally  speaking, the mineral with higher oxidation rate will have more loose structure  and more content of mud. Thus the difficulty of beneficiation will be larger.