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金厂峪金矿氰化厂采用氰化钠浸出金,贫液经诤化后仍然含全氰15～30(毫克/升),达不到国家规定的排放标准。1979年9月改进了净化工艺,获得满意的结果,总氰降到0.5(毫克/升)以下。改进含氰污水净化工艺的措施包括: 1.将加石灰粉改为加石灰乳。2.由于贫液成分复杂,重金属含量高(见下表),所以,将一次液氯处理改为多次液氯处理。3.使用50F-40型耐腐蚀离心泵,保证加氯机的进水压力为3(公斤/厘米~2)。4.反应池两根进液管给液改成切线方向。试验按下述程序进行。先测污水含氰量,算出该给入的氯量和石灰量,石灰在搅拌槽中用贫液调成石灰乳,再加入混匀池中,经空气搅拌均匀后,
Jinchangyu gold mine cyanide plant using sodium cyanide leaching of gold, after the lean liquid is still containing all-cyanide 15 to 30 (mg / L), less than the national emission standards. September 1979 to improve the purification process, to obtain satisfactory results, total cyanide down to 0.5 (mg / l) below. Measures to improve the cyanide-containing wastewater purification process include: 1. Add lime powder plus lime milk. 2. Due to the complex composition of lean liquid, heavy metal content (see table below), so, a liquid chlorine treatment changed to multiple liquid chlorine treatment. 3. Use 50F-40-type corrosion-resistant centrifugal pump to ensure that the chlorinator inlet pressure is 3 (kg / cm ~ 2). 4. Reaction tank into the liquid into two tangential direction. The test was carried out according to the following procedure. First determine the amount of cyanide wastewater, calculate the amount of chlorine and lime to the amount of lime in the mixing tank with lean liquid tune into lime milk, and then added to the mixing pool, the air after mixing,