含锑难处理金矿工艺矿物学特征及臭氧氧化预处理浸锑

摘要

针对复杂难处理金矿的矿物学特征和盐酸体系臭氧氧化预处理提锑开展研究.工艺矿物学研究表明,矿物中主要存在辉锑矿、毒砂、黄铁矿和脉石,67.42％的金被包裹在硫化物之中.开展盐酸体系中臭氧氧化提锑的研究,考察反应温度、液固比、盐酸浓度和搅拌速度等因素对提锑过程的影响,在优化实验条件下,锑的浸出率可达93.75％.经过臭氧氧化预处理过程,矿物中的锑得到有效回收,同时包裹在辉锑矿和部分黄铁矿中的金得到释放和暴露.%The mineralogical characterization of antimony-bearing refractory gold concentrates and the antimony extraction by ozone in HCl solution were investigated.The mineralogical study shows that there exist stibnite(Sb2S3),arsenopyrite(FeAsS),pyrite(FeS2) and quartz in the concentrates,and the gold is mainly (67.42％) encapsulated in sulfides.The antimony extraction by ozone in hydrochloric acid was employed and the influences of temperature,liquid/solid ratio,HCl concentration and stirring speed on the extraction of antimony were investigated.High antimony extraction (93.75％) is achieved under the optimized conditions.After the pretreatment by ozone,the antimony is recovered efficiently and the gold is enriched in the leaching residue.