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已经研制出了一种从辉钼精矿浸出铜、铅和钙的工艺.浸出物是一种含有氧化氯化物(即 CuC()_2、FeC()_3)和碱土金属氯化物《即CaC()_2》。在有20～30%的氯化钙存在时,氯化铜及三氯化铁对黄铜矿和方铅矿都是有效的氧化剂。氧化钙除了能增高浸出率外,还可以降低溶液的 PH 值和提高沸点。用1% CuC()_2—10%FeC()_3—30% CaC()_2溶液在110℃时,浸出两小时,辉钼精矿中铜的提取率高达98%,铅98%和钙79%。钼的溶解小于0.5%。浸出溶液能用气体氯迅速而有效地再生并循环使用。浸出液中铜和铅的含量,采取每周期排出约30%的浸出溶液的方法进行控制。
A process has been developed for the leaching of copper, lead and calcium from molybdenite concentrate, an aqueous solution containing oxidized chlorides (ie CuC () 2, FeC () 3) and alkaline earth metal chlorides )_2". Copper chloride and ferric chloride are effective oxidizers for both chalcopyrite and galena when 20-30% calcium chloride is present. In addition to calcium oxide can increase the leaching rate, but also can reduce the PH value of the solution and increase the boiling point. Leaching for 2 hours at 110 ℃ with 1% CuC (superscript 2-) 10% FeC () _3-30% CaC () _2 solution gave 98% copper, 98% lead and 79% %. The dissolution of molybdenum is less than 0.5%. The leachate solution can be quickly and efficiently regenerated and reused with gaseous chlorine. Leaching solution of copper and lead content, take a weekly discharge of about 30% of the leaching solution control.