摘要
以内蒙古西部某金矿已弃堆浸废石为研究对象,通过水浸法测定总氰化物和砷的浸出浓度。结果表明,在1#、2#堆中总氰化物和砷的浸出浓度变化范围分别为0.004~0.006、0.026~0.034 mg/L;0.005~0.1905、0.015~0.0405 mg/L,均低于《污水综合排放标准》(GB 8978—1996)的一级标准。这说明总氰化物和砷的浸出浓度会随着洗堆完成时间长短而变化,洗堆完成时间越久,总氰化物和砷浸出浓度降低的程度越高。洗堆完成时间越短,位于堆浸终点位置和堆底滤池单元中总氰化物浸出度浓度也相对越高,堆浸终点位置的砷的浸出浓度也相对越高,环境污染风险越大。
Taking the abandoned heap leach waste rock of gold mine in the west of Inner Mongolia as the research object,the total cyanide and arsenic leaching concentrations were determined by water leaching method.The results indicated that the leaching concentration of total cyanide and arsenic in the 1#and 2#stack ranged from 0.004 to 0.006 mg/L,0.026 to 0.034 mg/L,and 0.005 to 0.1905 mg/L,0.015 to 0.0405 mg/L,all of which were lower than the first-class standard in“Integrated wastewater discharge standard”(GB 8978—1996).The leaching concentration of total cyanide and arsenic in the heap leach waste rock changed with the completion time of the stack washing.The longer the completion time of the stack washing,the higher the reduction of the total cyanide and arsenic leaching concentrations were.The shorter the completion time of stack washing,the higher the total cyanide leaching concentration in the end of the heap leaching and the bottom filter unit and the higher arsenic leaching concentration in the end of the heap leaching were,rendering the greater risk of environmental pollution.
作者
张华
韩军玺
宋爽
孙伟
ZHANG Hua;HAN Junxi;SONG Shuang;SUN Wei(BGRIMM Technology Group,Beijing 100160,China;Alxa Left Banner Zhula Gold Development Co.,Ltd.,Alxa League Alxa Left Banner Inner Mongolia 750300,China)
出处
《有色金属（矿山部分）》
2020年第5期95-98,共4页
NONFERROUS METALS(Mining Section）
基金
“十三五”国家重点研发计划项目(2019YFC1805001)。
关键词
总氰化物
迁移规律
堆浸废石
浸出毒性
砷
total cyanide
immigration
heap leach
leaching toxicity
arsenic
