某高砷高铜金精矿综合回收金银铜试验研究

某高砷高铜金精矿含砷高达9.42%,采用加压氧化—氰化工艺处理,铜、金、银浸出率分别为96%～97%、99%、78%,加压氧化过程80%以上的砷固化在氧化渣中。同时开展了铜萃取、萃余液处理、毒性浸出等工艺单元试验,打通整体流程。毒性浸出试验表明,氰化渣、中和渣毒性浸出液中的重金属、砷浓度达标。采用加压氧化工艺处理高砷高铜金精矿是可行的。

Study on Comprehensive Recovery of Gold, Silver and Copper from High-arsenic and High-copper Bearing Gold Concentrate

High-arsenic and high-copper bearing gold concentrate containing 9.42% arsenic was treated by pressurization oxidation-cyanidation. Leaching rates of copper, gold and silver are 96%~97%, 99% and 78%, respectively. More than 80% of arsenic solidifies exist in oxidizing slag. At the same time, copper-extraction, raffinate treatment, toxic leaching and other process unit tests were performed. Copper extraction, raffinate treatment, and toxic leaching test were conducted. The toxic leaching test shows that concentration of heavy metals and arsenic in toxic leaching solution of cyanidation slag and neutralization slag is lower than that of standard value. It is feasible to treat high-arsenic and high-copper bearing gold concentrate by pressurization oxidation process.