难处理金精矿含元素硫的酸浸渣加石灰氧压浸金  

Gold Leaching of a Residue Containing Elemental Sulfur with Lime Added under Pressurized Oxygen

作　　者：方兆珩[1] 李兆军[1] 石伟[1] 韩宝玲[1] 

机构地区：[1]中国科学院过程工程研究所,北京100080

出　　处：《过程工程学报》2002年第1期17-20,共4页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:59974025)

摘　　要：实验研究了难处理金精矿含元素硫的酸浸渣加石灰氧压浸金过程,论述了石灰加入量、浸出时间和浸出温度对浸金的影响规律,发现最佳石灰加入量应使浸渣中元素硫与OH的摩尔比为0.8(1.1,在85(C和0.1(0.3 MPa氧压下浸出3(5 h,金的浸出率可达90%,此时终pH在5(8范围内. 根据实验结果分析,推断浸出过程中元素硫在一定pH值范围内氧化生成的S2O32-是主要的浸金剂.A gold leaching process for an acid leached residue from an arsenic refractory gold concentrate in lime slurry under pressurized oxygen is investigated. The residue contains 17.4% of elemental sulfur. The experimental results show that the optimum quantity of lime added to the leaching solution should ensure the mole ratio of elemental sulfur to OH in the range of 0.8 to 1.1. In 3 to 5 h, 90% of gold is leached at 85C under 0.1 to 0.3 MPa oxygen pressure with the optimum lime addition in the solution. The thiosulphate produced from elemental sulfur in lime solution during oxygen leaching might be the major complexing agency for gold leaching.

关 键 词：浸金 氧压浸出 元素硫 石灰 难处理金精矿 

分 类 号：TF031[冶金工程—冶金物理化学]