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双重难选金精矿经两段细菌处理可同时破坏其中的硫化矿物和含碳基质。在第一段熟知的硫化矿物生物氧化过程中,用矿质化能营养细菌氧化硫化矿物,在第二段中,用多毛链霉菌破坏含碳基质。在第一段中硫化矿物生物氧化后金的氰化率为81.1%。在第二段中多毛链霉菌的作用可降低含碳基质的含量,这有利于降低矿石的劫金程度和改善金的氰化行为。矿浆浓度、温度和与细菌作用时间影响含碳基质的分解率。含碳基质破坏后,金的氰化率由13.6%提高到94.7%。研究结果表明,应用新的两段细菌预处理法可分解硫化矿物和含碳基质,提高从双重难选金矿石中浸出金的浸出率。
Dual refractory gold concentrate treated by two bacteria can destroy both sulfide minerals and carbonaceous substrates. In the first well-known sulphide mineral biooxidation process, the sulphide mineralized minerals are oxidized by the mineralizing energy nutrient and in the second, the carbonaceous substrate is destroyed by the hairy streptomyces. In the first paragraph, the cyanidation rate of gold was 81.1% after biological oxidation of sulphide minerals. In the second paragraph, the role of Streptomyces by hair can reduce the carbon content of the matrix, which is conducive to reducing the degree of gold robbed ore and improve gold cyanide behavior. Pulp concentration, temperature, and bacterial action time affect the rate of carbon-containing matrix decomposition. After the destruction of carbonaceous matrix, the cyanidation rate of gold increased from 13.6% to 94.7%. The results show that the application of a new two-stage bacterial pretreatment method can decompose sulfide minerals and carbonaceous substrates and improve the leaching rate of gold from double refractory gold ore.