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一、前言某銅矿选矿厂处理两种含銅矿石,一种是蛇紋石磁鉄含銅和磁鉄矿含銅矿石(顏色暗黑,称黑矿石);另一种是滑石、阳起石含銅矿石(顏色灰白,称白矿石)。两种矿石性质相差悬殊,可选性差別极大。白矿石易选,銅回收率可达85—90%;黑矿石难选,銅回收率一般仅达50％左右。因此每当入选矿石中黑矿石比例增加时,即导致选矿厂銅回收率明显地降低。生产实践表明,当入选矿石中黑矿石比例占10%肘,选矿厂銅回收率可达88～90%;占20～30%时,銅回收率为80％左右;占30～40%时,銅回收率为70～80％;占50～60%时, 銅回收率則明显地降低到65～70%。
I. Introduction A copper ore processing plant deals with two copper-bearing ores, one is a serpentine magnetite containing copper and a magnetite ore containing copper (dark color, called black ore); the other is talc, Copper ore (gray color, called white ore). The nature of the two minerals vary greatly, the options vary greatly. Easy selection of white ore, copper recovery up to 85-90%; difficult to pick black ore, copper recovery rate is generally only about 50%. Therefore, whenever the proportion of black ore in the selected ore increases, the recovery rate of copper in the concentrator is significantly reduced. The production practice shows that when the proportion of black ore in the selected ore accounts for 10%, the recovery rate of copper in the concentrator can reach 88-90%; when the copper content is 20-30%, the recovery rate of copper is about 80%; when 30-40% The recovery rate of copper is 70-80%. When it accounts for 50-60%, the copper recovery rate is obviously reduced to 65-70%.