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苏联国立有色金属科学研究所在研究从氧化-硫化结合铜矿石中回收铜的方法指出,在粒度大于50微米的粒级中硫化铜含量高。由于氧化铜矿物容易过磨,因此氧化铜便富集于尾矿泥部分中。如果在浮选粒级(10—50微米)中氧化矿含量很高,那就可以定论,铜矿物(铝代硅酸盐、铝代磷酸盐等)是不可浮的。对于处理这种矿石,预先浮选易浮矿物的联合流程是最有效的(图)。这个流程同单一的联合流程比较,酸和铁的用量可以降低,可是导致精矿中铜的品位下降,仅达15.7%。在许多情况下,对含有氯铜矿的矿石在联合法处理前采用预先浮选的流程,具有避免氯离子
The National Institute of Nonferrous Metal Research in the Soviet Union studied the recovery of copper from oxidized-sulphidated copper ores by pointing out that the copper sulphide content is high in the fractions of more than 50 micrometers. Copper oxide is enriched in the tailings fraction because copper oxide is easily worn. If the oxide mineral is very high in the flotation (10-50 microns), then it can be concluded that the copper minerals (aluminosilicates, aluminophosphates, etc.) are not flotable. The joint process of pre-flotation of flotation minerals is most effective for the treatment of such ores (Figure). This process, combined with a single joint process, reduced acid and iron levels, but resulted in a drop of copper grade in the concentrate of only 15.7%. In many cases, pre-flotation processes are applied to ores containing ores of copper and copper prior to the combined process, with the benefit of avoiding chloride