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我矿铜铅部分混合浮选流程中,铜铅分离浮选循环使用重铬酸钠作为铅抑制剂,消耗量为60(克/吨)。每天排出厂外的含铬废水达500多吨,铬离子浓度为61.8(毫克/升),超过国家规定排放标准120倍以上。
In the mixed flotation process of copper, lead and lead in our mine, the copper-lead separation flotation cycle uses sodium dichromate as a lead inhibitor with a consumption of 60 (g / t). Chromium wastewater discharged from the factory every day more than 500 tons, chromium ion concentration of 61.8 (mg / L), more than 120 times the national emission standards.