摘要
铅阳极泥火法处理过程中产生的砷锑烟灰对环境的危害巨大,但其中锑作为有价金属又需要回收利用,因此对砷锑烟灰进行砷锑分离具有实际意义。采用常压碱浸的方式对砷锑烟灰的分离进行了实验研究。首先考察了常压碱浸过程中添加双氧水对砷锑分离的影响,结果发现添加双氧水对砷锑分离的影响不明显,因此后续选择不使用氧化剂进行碱性浸出。其次考察了浸出温度、NaOH浓度、液固比和浸出时间等因素对砷锑分离的影响,结果表明:在70℃、NaOH浓度60 g/L、液固比(mL/g)4∶1、搅拌转速恒定为400 r/min,浸出90 min的条件下,砷浸出率达到93.92%,锑浸出率为2.74%,该工艺可以达到砷锑有效分离的目的。
The arsenic and antimony soot produced during the fire treatment of lead anode slime is harmful to the environment,but antimony as a valuable metal needs to be recycled.Thus,separating arsenic and antimony soot has practical significance.In this study,the separation of arsenic and antimony soot was studied by alkaline leaching at atmospheric pressure.Firstly,the effect of hydrogen peroxide on separating arsenic and antimony in the atmospheric alkali leaching process was investigated.The results showed that the effect was not so obvious that no oxidizing agent was used in the subsequent alkaline leaching.Secondly,the effects of leaching temperature,NaOH concentration,liquid-solid ratio and leaching time on the separation of arsenic and antimony were investigated.The results showed that under the conditions of 70℃,NaOH concentration of 60 g/L,liquid-solid ratio(mL/g)of 4∶1,constant stirring speed of 400 r/min,and leaching for 90 min,the leaching rate of arsenic and antimony reached 93.92%and 2.74%,which indicated that this process could achieve the aim of effective separation of arsenic and antimony.
作者
喻小强
徐家聪
易勤
温盛汇
田磊
YU Xiaoqiang;XU Jiacong;YI Qin;WEN Shenghui;TIAN Lei(Institute of Green Metallurgy and Process Intensification,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China)
出处
《有色金属科学与工程》
CAS
北大核心
2021年第3期42-49,共8页
Nonferrous Metals Science and Engineering
基金
国家自然科学基金资助项目(51804136,52064021,52074136)
中国博士后科学基金资助项目(2019T120625,2019M652276)
江西省主要学科学术与技术带头人-青年人才培养计划(20204BCJL23031)
江西省杰出青年科学基金(20202ACB213002)
江西理工大学青年英才支持计划资助
江西省博士后科研项目择优资助(2019KY09)。
关键词
铅阳极泥
砷锑烟灰
砷锑分离
常压碱浸
lead anode slime
arsenic antimony soot
separation of arsenic and antimony
atmospheric alkaline leaching
作者简介
通信作者:田磊(1985-),男,博士,副教授,主要从事湿法冶金、复杂多金属固废资源循环利用方面的研究。E-mail:tianleijx@163.com。
