期刊论文

Study on Extraction of Au from Gold-bearing Sulfur Concentrates with High Content of Arsenic by Microwave Roasting Thiosulfate

中文

南华大学学报(自然科学版)

1673-0062

2016

30

3

30-35+43

10.19431/j.cnki.1673-0062.2016.03.007

12JJ8008:湖南省自然科学省市联合基金 :核能开发科研项目

本校为第一机构

高砷含金硫精矿中的金常包裹于黄铁矿与毒砂中,直接浸出金浸出率很低,属于典型的难处理含金矿石.本文采用常规焙烧和微波焙烧对高砷含金硫精矿进行预处理,再采用硫代硫酸盐溶液浸出,并将两种焙烧方法得到的焙砂进行了S元素含量、XRD、SEM、比表面积和浸出率分析,并对比了二者的结果,得出以下结论：微波焙烧在15 k W条件下焙烧60 min,S的去除率能达到88.6%,虽低于常规焙烧700℃条件下焙烧2 h的94.7%,但能耗更少;微波焙烧后焙砂含有的矿物较常规焙烧更加单一,矿物更纯;微波焙烧后焙砂的表面形貌变化更大,氧化程度更好;微波焙烧后焙砂的比表面积为31.9 m~2/g大于常规焙烧后的21.8 m~2/g,更利于浸出...

The leaching rate of gold by direct leaching is very low since the gold in the goldbearing sulfur concentrates with high content of arsenic is often locked in pyrite and arseno- pyrite.h belongs to the typical refractory gold-bearing ore.In this paper,the gold-bearing sul- fur concentrates with high content of arsenic were leached by thiosulfate after the pretreat- ment of conventional roasting and microwave roasting.The S element content, XRD, SEM, specific surface area and the gold leaching rate after the pretreatment of conventional roasting...