氰化尾渣中抑砷富集硫铁的研究

摘要

Cyanide residue from one smelting plant is used to enrich the pyrite and remove a portion of the arsenic.With the use of sulphuric acid as sulfur activator,the sodium humate and calcium hypochlorite is used as the arsenopyrite combined inhibitor in the flotation experiment.The results show that the sulphur grade in sulfur concentrate is more than 48%,while the arsenic grade reduces to below 0.2%.The analysis means of SEM and XRD are taken to analyze the occurrence of arsenic in cyanide residues.And the reasons for the difficulty in separation of sulphur and arsenic in cyanide residues are discussed.%以某冶炼厂氰化尾渣为研究对象，在富集硫铁的同时去除部分砷。以 H2SO4作为硫活化剂，采用腐殖酸钠和 Ca（ClO）2组合砷抑制剂对该氰化尾渣进行浮选实验。浮选结果显示，精矿中硫品位可达到48%以上，同时砷品位降低到0.2%以下。结合 SEM 和 XRD 分析手段对该浮选结果进行分析，研究了氰化尾渣中砷的赋存状态，并对氰化尾渣中硫砷难以分离的原因进行了初步探讨。