银硫化物对多金属硫化矿氰化浸金的影响（英文）

Impact of silver sulphides on gold cyanidation with polymetal sulphides

浸金会受到伴生银和多金属硫化矿的影响。采用填充床反应器研究4组矿物系统:黄铁矿-二氧化硅、黄铜矿-二氧化硅、闪锌矿-二氧化硅和辉锑矿-二氧化硅电极的电偶和钝化效果。结果表明,在电偶和钝化作用下,硫锑银矿(Ag3Sb S3)使黄铁矿中Au的浸出率分别提高到77.3%和51.2%(相对于74.6%和15.8%);在电偶和钝化作用下,闪锌矿+硫锑银矿也使金的浸出率分别提高到6.6%和51.9%(相对于1.6%和15.6%);黄铜矿+硫锑银矿使金的浸出率分别降低到38.0%和12.1%(相对于57%和14.1%);在电偶和钝化作用下,添加银矿使黄铁矿中Au的浸出率分别提高到90.6%和81.1%(相对于74.6%和15.8%);添加银矿物和闪锌矿使Au浸出率分别提高至71.1%和80.5%(相对于1.6%和15.6%);添加银矿物和黄铜矿,金的浸出率分别降低至10.2%和4.5%(相对于57%和14.1%)。硫锑银矿和辉锑矿在一起会阻碍金的溶解。硫锑银矿和添加银矿增强游离金与黄铁矿和闪锌矿伴生金的溶解,黄铜矿和辉锑矿中伴生金银阻碍了金的溶解。

Gold leaching was influenced in association with silver and polymetal sulphide minerals.A packed bed was adopted to single out the galvanic and passivation effects with four sets of minerals:pyrite?silica,chalcopyrite?silica,sphalerite?silica and stibnite?silica.Pyrargyrite enhanced Au recovery to 77.3%and 51.2%under galvanic and passivation effects from pyrite(vs 74.6%and 15.8%).Pyrargyrite in association with sphalerite also enhanced Au recovery to 6.6%and 51.9%(vs 1.6%and 15.6%)under galvanic and passivation effects from sphalerite.Pyrargyrite associated with chalcopyrite retarded gold recovery to 38.0%and 12.1%(vs 57%and 14.1%)under galvanic and passivation effects.Accumulative silver minerals enhanced Au recovery to 90.6%and 81.1%(vs 74.6%and 15.8%)under galvanic and passivation impacts from pyrite.Silver minerals with sphalerite under galvanic and passivation effects enhanced Au recovery to 71.1%and 80.5%(vs 1.6%and 15.6%).Silver minerals associated with chalcopyrite retarded Au recovery to 10.2%and 4.5%under galvanic and passivation impacts(vs 57%and 14.1%).Stibnite retarded Au dissolution with pyrargyrite and accumulative silver minerals.Pyrargyrite and accumulative silver enhanced gold dissolution for free gold and gold associated with pyrite and sphalerite.Gold dissolution was retarded for gold and silver minerals associated with chalcopyrite and stibnite.