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叙述了处理矿物成份复杂的低品级氧化 -硫化铜精矿的氧化 -硫酸化焙烧、硫酸浸出和水解净化工艺。半工业试验表明 ,氧化 -硫酸化焙烧温度以 5 0 0℃为最佳 ,此时 ,不仅铜的浸出率高 ,而且 ,浸出时生成的亚铁酸盐量少。浸出液中含有一些难溶的杂质 ,可以采用石灰和氢氧化钠作中和剂的两段水解净化流程 ,除去溶液中的铁、铝和硅
Describes the oxidation-sulphation roasting, sulfuric acid leaching and hydrolysis purification processes that deal with the complex, low-grade, oxidized-copper sulphide concentrate of mineral composition. Semi-industrial tests show that the oxidation-sulfation roasting temperature is the best at 500 ℃. In this case, not only the leaching rate of copper is high, but also the amount of ferrite produced during leaching is small. Leaching solution contains some insoluble impurities, you can use lime and sodium hydroxide as a neutralizing agent of the two-stage hydrolysis purification process to remove the solution of iron, aluminum and silicon