高砷硫金精矿提金研究

广西贵港金精矿含15%～22%As,并含碳、铅等不利于氰化的元素,金直接氰化率8%～36%。采用催化氧化酸浸法预处理后,金氰化率可达92%～98%,氰渣浮选后精矿的金总收率达97%～99%。预氧化工艺在中温自热、低压、低酸操作条件下进行,废渣、废液符合环保要求。多批次小型试验及扩大试验结果表明该工艺技术指标稳定,经济可行。

Investigation on Gold Recovery from High Arsenic Sulfur Bearing Gold Concentrate

Guangxi Guigang gold concentrate contained 15%~22% As, carbon, lead and other detrimental element, gold direct cyaniding recovery was 8%~36%. Gold cyaniding recovery reached 92%~98%, summary gold recovery after flotation of cyanide residue reached 97%~99% with pretreatment of catalytic oxidation acid leaching. The pre-oxidation process could be operated in self-heating, low pressure, low acidity operation conditions. Waste residue and effluent complied with environmental requirements. Results of laboratory experiments and pilot trials indicate that this technology route is stable and feasible.