摘要
探讨了硫酸作为氧化剂分解含砷难处理金矿的技术可行性，实验结果表明硫酸可以有效地氧化砷黄铁矿而实现金的单体解离，适宜的分解条件为：硫酸与矿粉重量比为３，采用机械搅拌，反应温度２４０～２６０℃，分解时间２～３ｈ，分解渣采用硫脲浸出时浸金率高于９５％浸金条件为：硫脲浓度１％，三价铁作氧化剂，氧化剂与络合剂比值为０．０４～０．０６，浸出时间６ｈ图１，表６。
A new pretreating process based on sulfuric acid oxidation was proposed to oxidize
refractory gold ores bearing arsenic minerals.The experimental results showed that sulfuric
acid can oxidize arsenopyrite effectively to release gold from its coverings and the optimum
condition is :the ratio of sulfuric acid to ore equals 3,reaction time 23 h with mechanical stirring
at 240260 .The oxidized residue was leached by thiourea to extract gold with Fe() as oxidant
and the ratio of oxidant to ligand(here TU) is 0.040.06.The recovery of gold is more than 95%
after leaching 6 h in the solution of TU(1%) with Fe() as oxidant.1fig.,6tabs.,8refs.
出处
《湘潭矿业学院学报》
EI
1999年第1期39-43,共5页
Journal of Xiangtan Mining Institute
关键词
无害化工艺
硫酸氧化
硫脲
金矿
选矿
提金
non-toxic process,sulfuric acid oxidation,refractory ores,thiourea,gold extractio Chinese Library
Books NoX383
