提高某含砷锑金精矿氰化回收率试验研究

摘要

A gold concentrate has high arsenic and antimony content,which makes its treatment difficult and di-rect cyanidation less effective.Therefore,the paper carried out experimental study on improving the cyanidation leac-hing rate.The results show that under optimal conditions,the alkaline leaching pretreament-2-stage roasting-roast-ing residue regrinding-cyanidation leaching process can obtain a gold leaching rate up to 90.23%,57.46 percentage points higher than direct cyanidation,and 5.26 percentage points higher than the cyanidation leaching after regrinding of the gold concentrate subjected directly to 2-stage roasting.%针对某含砷锑金精矿砷、锑含量高难处理,直接氰化金浸出率低等问题,进行了提高金氰化回收率试验研究.结果表明:采用碱浸预处理—两段焙烧—焙砂再磨—氰化浸出工艺,在最佳试验条件下,获得金浸出率90.23 %的较好指标,较直接氰化金浸出率提高57.46百分点,较金精矿直接两段焙烧后再磨氰化提高5.26百分点.