湖南某低品位晶格金型金矿选矿工艺  

Processing Technology for a Low-grade Lattice-gold Rock Gold Ore in Hunan

作　　者：肖骏[1,2] 陈代雄[1,2] 杨建文[1] 

机构地区：[1]湖南有色金属研究院复杂铜铅锌共伴生金属资源综合利用湖南省重点实验室,长沙410100 [2]中南大学资源加工与生物工程学院,长沙410083

出　　处：《有色金属工程》2015年第3期63-67,共5页Nonferrous Metals Engineering

摘　　要：湖南某石英脉型岩金矿床,原矿金品位2.06 g/t,基本以"不可见型"赋存于黄铁矿晶格之中。针对该金矿床的载金矿物——黄铁矿嵌布不均匀、部分微细粒黄铁矿与细粒脉石连生或包裹的特性,确定直接浮选法获得高品位的金-硫精矿的工艺。采用"戊基黄药+异丁基戊黄药"组合捕收剂最大限度地回收金硫矿物,粗精矿再磨提高粗精矿中细粒黄铁矿-石英连生体单体解离度。全流程闭路试验获得含金32.81 g/t、含硫39.54%、金回收率83.87%、硫回收率70.68%的金硫精矿。A high-quartz rock gold deposit in Hunan with gold grade 2.06 g/t, the gold is basically in the ＂invisible＂ atomic lattice-gold mainly occurring in pyrite. The application of the technology for high-grade gold-pyrite concentrate production by direct flotation is determined based on the characteristics of the gold bearing mineral-pyrite in the gold deposit, such as heterogeneous dissemination, part micro- fine pyrites associated with or wrapped by micro-fine gangue minerals. The combination collector of ＂amyl xanthate ＋ isoamyl amyl xanthate （Y89） ＂ is adopted for recovering the minerals of gold and pyrite the maximum extent, meanwhile the rough concentrate is regrinded to improve the dissociation of interlocked pyrite-quartz. The gold-pyrite concentrate with gold grade 32.81 g/t and the sulfur grade 39.54% is obtained by the whole closed-circuit test, the recovery rates of gold and sulfur are 83.87% , 70.68% , respectively.

关 键 词：晶格金 组合捕收剂 浮选 异丁基戊黄药 

分 类 号：TD923[矿业工程—选矿] TD953