摘要
本试验以国内某超细微难处理金矿为研究对象,开展酸性热压氧化工艺研究;分析了温度因素对硫化矿物氧化、元素迁移和金氰化浸出等的影响。试验结果表明,通过温度变化可影响黄铁矿和砷黄铁矿氧化反应速率,进而对S、Fe和As元素的迁移状态产生影响。反应温度越高黄铁矿和砷黄铁矿氧化越彻底,有利于金的氰化浸出;完全氧化后金的浸出率约为94%。浮选金精矿中的黄铁矿、砷黄铁矿逐渐氧化转变为砷酸铁盐、铁砷硫硅等多元素共沉物质,未发现有碱式硫酸铁或铁矾物相,反应生成的各种沉淀产物对浸出率无显著影响。
The acid pressure oxidation for a fine refractory gold concentrate was studied, and the effect of tempera-ture on the oxidation of sulfide minerals, the migration of element and gold cyanide leaching was studied. Experi-mental results show that the reaction rate of pyrite and arsenopyrite was influenced by temperature, and the transfor-ming state was also influenced. The higher the reaction temperature is, the higher the oxidation of pyrite and arseno-pyrite is more thorough, which is helpful for cyanide leaching of gold. the gold cyanide leaching rate was about 94%after being thoroughly oxidized.. In the solid phase, pyrite and arsenopyrite had transformed gradually into Ferric ar-senate or the co-deposition that was containing iron, arsenic, sulfur, silicon, and other elements. The precipitationproduced during the reaction had no significant effect on cyanide leaching.
出处
《矿产综合利用》
CAS
北大核心
2016年第4期65-69,共5页
Multipurpose Utilization of Mineral Resources
基金
资源节约与综合利用技术应用示范项目(12120113088100)资助
关键词
难处理金矿
热压氧化
氰化浸出
Refractory gold ore
Pressure oxidation
Cyanidation
