微波氧化辅助铜冶炼烟灰选择性浸出脱砷  

Arsenic Removal from Copper Smelting Ash Assisted by Microwave and Oxidation

作　　者：王倩[1] 郭莉[2] 陈绍华[1] 宋子玉[1] 杜冬云[1] 

机构地区：[1]催化材料科学国家民委-教育部共建重点实验室中南民族大学资源与环境学院,武汉430074 [2]生物地质与环境地质-国家重点实验室中国地质大学(武汉)环境学院,武汉430074

出　　处：《有色金属（冶炼部分）》2017年第5期5-10,共6页Nonferrous Metals（Extractive Metallurgy)

基　　金：湖北省科技支撑项目(2014BEC029)

摘　　要：采用微波氧化辅助Na_2S-NaOH浸出体系对铜冶炼烟灰(简称烟灰)进行研究,在微波时间180s、微波档位7档(560 W)和氧气流量10L/min的条件下,砷、铜、锌、铅的浸出率分别为98.45%、3.64%、3.88%、0.41%,实现了砷的选择性分离。XPS、XRD、SEM和重金属形态分析结果表明,微波氧化有利于砷的选择性分离。Copper smelting dust （referred to as ＂soot＂） was investigated through Nae S-NaOH leaching process assisted with microwave and oxidation. The results show that leaching rate of As, Cu, Zn, and Pb is 98.45%, 3.64%, 3.88%, and 0.41% respectively under the optimum conditions including microwave time of 180 s, microwave gear of 7 （560 W）, and oxygen flux of 10 L/min. Arsenic is selectively separated from soot. Na2 S-NaOH leaching assisted with microwave and oxidation is an efficient way to remove arsenic from soot based on XPS, XRD, SEM, and speciation analysis of heavy metals.

关 键 词：铜冶炼烟灰 微波 选择性 分离 砷 氧化 浸出 

分 类 号：X759[环境科学与工程—环境工程]