高效硫化工艺清洁处理酸性高砷废水试验研究与工业应用  

The experimental research and industrial application of efficient sulphuration process clean treatment of acid wastewater with high arsenic content

作　　者：刘占林 郭建东 梁志伟 张吉才 

机构地区：[1]山东国大黄金股份有限公司

出　　处：《黄金》2012年第7期52-54,共3页Gold

摘　　要：经试验研究与工业应用,对两段焙烧产生的酸性高砷废水,采用一步高效硫化工艺沉淀砷,砷质量浓度由1 331.37 mg/L降低为104.66 mg/L,砷的沉淀率为92.14%;硫化沉砷渣中砷质量分数为31.26%,返回焙烧回收;硫化沉砷后废液采用二步电石渣-铁盐中和处理,处理后废水中砷平均质量浓度为0.42 mg/L,低于国家允许排放标准,且作为中水返回生产系统循环利用。采用该工艺有效地解决了两段焙烧酸性高砷废水中砷的回收问题,工艺简单、成本低、适用性强、效果好、易推广,有着良好的经济效益、环保效益和社会效益。Through experimental research and industrial application, one-step efficient sulphuration process was used to precipitate the acid wastewater with high arsenic content produced from the two-stage roasting. The content of arsenic was reduced from 1 331.37 mg/L to 104.66 mg/L, with the sedi/nentation rate of the arsenic being 92 % and the content of arsenic in the vulcanizing sediment being 31.26 % , and the arsenic was recovered in the system. After vulcanizing precipitating the arsenic, the effluent solution is neutralized by two-step_ carbide slag-ferric salt process that controls the average content of arsenic to 0.42 mg/L, lower than the national standards, which is also treated and recycled to the production system as reclaimed water. By using this process, the problem of the arsenic recovery in the acid wastewater with high arsenic content from the two-stage roasting was effectively handled. This process is simple, low cost, adaptive, effective, and easy to use. This process brings also remarkable economic, environmental and social benefits.

关 键 词：酸性高砷废水 硫化工艺 清洁处理 试验研究 工业应用 

分 类 号：X751[环境科学与工程—环境工程]