Direct Extraction of Gold from Sulfide Refractory Concentrate by Liquid Chlorination System
In order to eliminate cyanide pressure on the environment and management risk,urgent need to explore no-cyanide gold leaching method,so a NaCl-NaClO solution system was put forward to extract gold from a refractory sulfide gold concentrate,and the effect of NaCl and NaClO ratio of concentration,reaction time to the leaching rate were investigated,and the raw materials and the leaching residue were characterized by XRD,XRF,SEM and EDS.It is indicate that in the acidic conditions,the chlorination system is very effective for gold leaching from sulfide mineral directly,in the ore package and the desulfurization rate can be achieved at 96.26% and 98% with most optimum conditions as follows: NaCl concentration 50g/L,NaClO concentration 200g/L,Liquid-solid ratio 10:1,the best reaction time was 150 mins.And these conditions should be guaranteed pH<8.0,ORP>900mV.
Gold leaching Non-cyanide method Liquid Chlorination Refractory gold concentrate
Hongxu LI Chao LI Qiankun Jing Tong Yu Junjie Zhang
Beijing Key Lab of Green Recycling and Extraction of Metals,University of Science and Technology,30# Xueyuan Road,Beijing,100083,China;School of Metallurgical and Ecological Engineering,University of Science and Technology Bejing,30# Xueyuan Road,Beijing,100083,China
国内会议
西安
英文
1-7
2016-09-01(万方平台首次上网日期,不代表论文的发表时间)