高砷难处理硫精矿氰化浸出提银实验研究  

Study on the Extraction of Silver from High Arsenic Refractory Sulfur Concentrate

作　　者：胡杨甲[1] 贺政[1] 赵志强[1] 罗思岗[1] 

机构地区：[1]北京矿冶研究总院矿物加工科学与技术国家重点实验室,北京100160

出　　处：《贵金属》2015年第3期14-18,共5页Precious Metals

摘　　要：某硫精矿中的银矿物嵌布粒度非常细小,包裹于硫化物中的银约占50.46%,属于难处理高砷含银硫精矿。采用细磨后化学预处理氰化浸出,银浸出率仍然低于80%;硫精矿经氧化焙烧后,As、S的脱除率都达到90%以上,但银浸出率却较低;对该含银硫精矿添加钠盐焙烧预处理,再采用常规氰化法浸出,银浸出率显著提高,达到85.15%,同时氰化钠耗量降低至2.0 kg/t。The silver bearing sulfur concentrate is refractory one due to its high arsenic and its fine silver minerals. The cyanidation leaching rate of silver was low （〈80%） despite the sulfur concentrate was treated by fine grinding and chemical reagent. After oxidation roasting, the removal rates of As and S in concentrate reached 90% above, however the leaching rate was still low. The leaching rate was significantly improved when the concentrate was roasted by adding NaXY. The leaching rate can reach 85.15% and the consumption of NaCN reduced to 2.0 kg/t.

关 键 词：有色金属冶金 高砷 难处理 硫精矿 氰化浸出 提银 

分 类 号：TF832[冶金工程—有色金属冶金]