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Beneficiation method for mixed copper ore with low oxidation rate and high binding rate

机译:低氧化率,高结合率的混合铜矿的选矿方法

摘要

A beneficiation method for a mixed copper ore with a low oxidation rate and a high binding rate. For an oxide-sulfide mixed copper ore with a low oxidation rate and a high binding rate, in the method, a copper sulfide ore and a free copper oxide ore therein are recovered by means of floatation, a floated ore concentrate is desulfurized by roasting to obtain a copper oxide concentrate, flue gas produced after the roasting is used for leaching out difficult-to-float copper oxide and bound copper in flotation tailings, then the tailings are precipitated by sodium sulfide to leach copper ions in ore pulp so as to obtain a copper sulfide sediment, a xanthate is added for floating the copper sulfide sediment to obtain a copper sulfide concentrate, the copper sulfide concentrate and an oxide-sulfide mixed copper concentrate are mixed, then a mixture is desulfurized by roasting, and a final copper oxide concentrate is obtained. According to the method, low-grade tailings are leached out by sulfur dioxide generated by sulfur in an ore concentrate, difficult-to-float free copper oxide and bound copper which are difficult to recover in flotation tailings are recovered, costs are low, and the comprehensive recovery rate of copper is improved significantly.
机译:具有低氧化率和高结合率的混合铜矿的选矿方法。对于具有低氧化率和高结合率的氧化物-硫化物混合铜矿石,在该方法中,通过浮选回收硫化铜矿石和其中的游离氧化铜矿石,通过焙烧将浮选的精矿脱硫至得到氧化铜精矿,焙烧后产生的烟气用于浮选尾矿中难浮的氧化铜和结合铜的浸出,然后将尾矿经硫化钠沉淀,使矿浆中的铜离子浸出,得到硫化铜沉淀物,加入黄原酸盐使硫化铜沉淀物漂浮,得到硫化铜精矿,将硫化铜精矿和氧化物-硫化物混合的铜精矿混合,然后通过焙烧将混合物脱硫,最终得到氧化铜。获得浓缩物。根据该方法,通过硫精矿中硫产生的二氧化硫浸出低品位尾矿,回收难以在浮选尾矿中回收的难以漂浮的游离氧化铜和结合铜,成本低廉,并且铜的综合回收率明显提高。

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