摘要
河南某金矿石含金2.00 g/t,含砷1.24%,属高砷难处理金矿石。对该矿石采用石灰控制矿浆pH为抑制砷矿物所需的碱性,同时加入保护剂LA破坏金载体矿物黄铁矿表面因碱性条件而生成的氧化亲水膜,成功实现了金砷浮选分离,闭路试验所得金精矿金品位达68.00 g/t,金回收率达78.43%,砷含量仅为0.37%。机理分析表明,对于金载体矿物是硫矿物的含砷金矿石,由于砷矿物和硫矿物热力学稳定性的差异,在碱性条件下,通过加入保护剂LA破坏硫矿物表面的亲水氧化膜,实现金砷分离在理论是可行的,从而为试验结果提供了理论依据。
A certain Henan gold mine with gold and arsenic content of 2.00 g/t and 1.24% belongs to the refractory gold ore with high content of As. In order to utilize the resource, this paper controls the pH of slurry with lime to depress the alkality that are needed by arsenic ores. Meanwhile, the protective agent LA is added to destroy the hydrophilic oxidized film which is formed on the surfaee of sulfide mineral in the condition of alkalinity. By this method,the separation of gold and arsenic has successfully achieved. In the closed test,the gold grade of gold concentrate can reach 68.00 g/t with the gold recovery of 78.43%, and the arsenic content of only 0. 37%. The mechanism analysis shows that as the gold carrier is the arsenic-containing gold mineral of sulfide, and for the difference of the thermodynamics stability of arsenic and sulfide mineral, it is feasible to separate gold and arsenic in theory by adding protective agent LA to destroy the hydrophilic oxidized film of the sulfide mineral surface in alkalinity condition, thus providing a theoretical basis for test results.
出处
《金属矿山》
CAS
北大核心
2011年第2期64-67,89,共5页
Metal Mine
关键词
含砷金矿石
金砷分离
矿浆pH
保护剂LA
Arsenic-containing gold ore, Separation of gold and arsenic, Slurry pH, Protective agent LA
