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采用铁硫杆菌氧化—氰化浸出法提高了从3种难处理硫化物精矿中提取金的回收率。精矿分析表明,砷黄铁矿、黄铁矿和辉锑矿是有伴生金的主要硫化物精矿。通过对每种精矿进行动力学氧化试验,测定了浸出矿浆中的铁和砷含量。细菌氧化渣氰化浸出试验建立了细菌氧化程度与金提取率的相互关系,在矿浆浓度20％～25％时,近8天时间,精矿的细菌氧化达到很高程度,使金的提取率达到70％～90％。
The use of the Thiobacillus ferrooxidans-cyanidation leaching method increased the recovery of gold from the three refractory sulphide concentrates. Concentrate analysis shows that arsenopyrite, pyrite and stibnite are the major sulphide concentrates with associated gold. The iron and arsenic contents in the leached slurry were determined by kinetic oxidation of each concentrate. Bacterial oxidation residue cyanidation leaching test established the degree of bacterial oxidation and gold extraction rate of the relationship between the pulp concentration of 20% to 25%, nearly 8 days, the concentration of bacteria in the ore oxidation to a high degree, the extraction rate of gold Reached 70% ~ 90%.