摘要
为了减少铜熔炼渣中砷所带来的环境问题,提出一种基于气体喷吹脱除熔融铜渣中砷的方法,期望在铜回收工艺前将铜熔炼渣中的砷尽可能以粉尘的形式富集。对比惰性气体、氧化性气体和还原性气体对熔渣中砷脱除的影响。氧化性气体CO_(2)氧化夹杂冰铜中的砷及砷硫化物,并充当气体载体将砷氧化物带出熔池。还原性气体CO可以将FeOx-SiO_(2)熔渣中的砷氧化物还原,并使其挥发至气相,可以实现60%以上的砷脱除率。该研究为熔炼渣中砷脱除提供指导。
In order to reduce the environmental risks caused by arsenic in copper smelting slag,a method of dearsenisation from molten slag based on gas injection was proposed.It was expected to enrich arsenic in the form of dust prior to copper recovery process.The effects of inert,oxidising,and reducing gas on the removal of arsenic from molten slag were compared.When CO_(2)was injected,the removal of arsenic was mainly attributed to the oxidation of Cu–As inclusions and arsenic sulphide in the slag.Based on the injection of CO,the removal rate of arsenic reached more than 60%.Based on the injection of reducing gas,arsenic oxide in the FeOx−SiO_(2)slag was reduced and volatilised into the gas phase,resulting in the removal of arsenic.This study provides a reference with respect to the establishment of strategies for the mitigation of arsenic pollution caused by smelting slag.
作者
王宏阳
朱荣
董凯
张思奇
王云
兰昕怡
Hong-yang WANG;Rong ZHU;Kai DONG;Si-qi ZHANG;Yun WANG;Xin-yi LAN(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing100083,China;Beijing Key Laboratory for Special Melting and Preparation of High-end Metal Materials,University of Science and Technology Beijing,Beijing100083,China;School of Civil and Resources Engineering,University of Science and Technology Beijing,Beijing100083,China;The China ENFI Engineering Co.,Ltd.,Beijing100038,China;School of Automation and Electrical Engineering,University of Science and Technology Beijing,Beijing100083,China)
基金
supported by the National Natural Science Foundation of China(No.51674021)
the Major Science and Technology Innovation Project of Shandong Province,China(No.2019JZZY010358)。
关键词
铜熔炼渣
砷脱除
气体喷吹
污染物控制
copper smelting slag
dearsenisation
gas injection
pollutant control
