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Leaching sulphidic copper concentrates in sulphuric acid - where concentrate is crushed in attrition mill to increase extn. of copper
Leaching sulphidic copper concentrates in sulphuric acid - where concentrate is crushed in attrition mill to increase extn. of copper
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机译：在硫酸中浸出硫化铜精矿-在磨机中将精矿粉碎，以增加萃取力。铜
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摘要
The leaching process includes (a) milling the concentrate to below 40 mu m in a ball mill or similar plant; (b) fine milling in an attrition mill; (c) leaching in acid soln. contg. chloride ions and using O2 under press. Pref. 1-10(3)wt.% NaOH, w.r.t. the wt. of the concentrate, is added to the milling liq. to reduce agglomeration. The leaching soln. pref. contains 0.2-1g, esp. 0.6g of chloride ions per litre The amt. of copper extracted is substantially increased by using an attrition mill of the type employed in the pigment-or hard metal- industries, the mill reducing the grain size of the ore concentrate to e.g. 3 mu m.
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