甘肃两当某高硫金矿石选矿试验研究

摘要

There is 0.93 g/t gold in a high sulfur gold ore from Liangdang region in Gansu Prov-ince.76.71 % of the gold exists in form of packages and fissure gold in pyrite,fine disseminated,diffi-cult to be liberated.For fully recycling of gold in the ore,the flotation test research was conducted.Test results show that with Na2 S and Na2 SO3 as segmented sulfur inhibitor,CuSO4 as activator,butyl xanthate+ammonium butyl aerofloat as combination collector,via two roughing two scavenging-regrinding on the rough concentrate-four cleaning closed circuit separation process,gold concentrate with 20.74 g/t gold, 39.33% sulfur,gold recovery of 70.90%,tailings of 0.29 g/t gold was finally obtained,concentration of the gold was obtained,reduce the influence of sulfur on the gold concentrate quality.The test results provide technical basis for the determination of dressing process on the gold ore.%甘肃两当地区某高硫金矿石，金品位0．93 g／t，硫含量较高。76．71％的金以包裹金、裂隙金的形式嵌布在黄铁矿中，嵌布粒度细，单体解离困难。为充分回收利用矿石中的金，进行了浮选试验研究。试验结果表明，以 Na2 S 和 Na2 SO3分段抑制硫，CuSO4为活化剂，丁基黄药＋丁基铵黑药为组合捕收剂，原矿经2粗2扫—粗精矿再磨—4次精选闭路试验选别，最终可获得金品位20．74 g／t、含硫39．33％，金回收率70．90％的金精矿，尾矿金含量仅0．29 g／t，实现了金的富集，降低了硫对金精矿质量的影响。选矿试验结果为该金矿石选别流程的最终确定提供技术依据。