黄石某矿山酸性含铜废水中和试验  

Neutralization test on acidic wastewater containing copper from a mine in Huangshi

作　　者：陈勇 杨大兵[1] 张飞 车哲 刘琦 CHEN Yong;YANG Dabing;ZHANG Fei;CHE Zhe;LIU Qi(The College of Resources and Enviro nmental Engineering,Wuhan University of Science and Tech nology,Wuhan Hubei 430081,China)

机构地区：[1]武汉科技大学资源与环境工程学院,湖北武汉430081

出　　处：《化工矿物与加工》2020年第9期47-49,53,共4页Industrial Minerals & Processing

摘　　要：黄石某矿山采用铁炭微电解法处理含铜废水,实现了铜的回收,但处理后废水的pH为3.1,酸性较强。该矿山目前采用生石灰中和法处理该酸性废水,成本高,处理效率低,因此进行了生石灰中和法与石灰石-生石灰二段中和法的对比试验,分析了两种方法的处理效果和经济效益,发现后者处理含铜废水可以达到降本增效的目的。石灰石-生石灰二段中和法的反应过程为:先按每升废水加入15 g石灰石使废水pH达到5,反应时间为10 min,石灰石粒度为0.074 mm;再按每升废水加入5 g生石灰使pH达到7.5,反应时间为10 min,生石灰粒度为0.097 mm。The recovery of copper-bearing resources was realized by treating copper-containing wastewater from a mine in Huangshi with ferric-carbon micro-electrolysis process.However the pH of the treated wastewater was 3.1 indicating its high acidity.At present,the mine is treating the wastewater using the neutralization process with quicklime only,which is of high cost and low efficiency.The experiment was conducted by comparing the one-stage neutra-lization based on quicklime with the two-stage neutralization based on limestone followed by quicklime.The study on the effect and economic benefit from using the two methods shows that the use of two-stage neutralization is likely to reduce the cost and improve the efficiency of the treatment.The two-stage neutralization process with limestone followed by quicklime can be described as follows:Firstly the reaction took place for 10 min to modify the pH of the wastewater up to 5 with limestone with a dosage of 15 g/L wastewater and particle size of-0.074 mm.Then the pH of the solution was to be further increased to 7.5 by the reaction lasted for 10 min using quicklime with a dosage of 5 g/L wastewater and particle size of-0.097 mm.

关 键 词：含铜酸性废水 中和法 生石灰 石灰石 降本增效 

分 类 号：X758[环境科学与工程—环境工程]