某金锑矿选矿试验研究

Experimental Study on Beneficiation of Gold-Antimony Ore

对某Sb品位7.94%、Au品位1.95 g/t的石英脉型金锑硫化矿进行了浮选试验研究。采用混合浮选工艺,以丁基黄药和丁铵黑药为捕收剂、硫酸为pH值调整剂、硝酸铅和硫酸铜为活化剂,经一次粗选三次精选三次扫选闭路浮选,获得了产率20.17%、Sb品位和回收率分别为37.35%和94.87%、Au品位和回收率分别为7.79 g/t和80.39%的金锑混合精矿,精矿品级符合锑精矿质量标准(YB 2419—82)中硫化锑精矿三级品,金和锑都得到较好地回收。

Flotation tests were conducted to process a quartz vein type gold-antimony ore with Sb grade of 7.94%and Au content of 1.95 g/t.A bulk flotation flowsheet was adopted,with butyl xanthate together with ammonium dibutyl dithiophosphate as the collector,sulfuric acid as the pH regulator,and lead nitrate and copper sulfate as the activators.A closed-circuit flotation process consisting of one stage of roughing,three stages of cleaning and three stages of scavenging produced a concentrate grading 37.35%Sb and 7.79 g/t Au at Sb recovery of 94.87%and Au recovery of 80.39%,with a yield of 20.17%.According to the standard(YB 2419—82),the concentrate grade meets the quality requirement for antimony sulfide concentrate(grade III),indicating that both gold and antimony are effectively recovered.