Sustained-release effect of armphous FeS and its application in sulfurization separation of copper and arsenic

被引：0
|
作者：
Zhang X.-F. [1 ,2 ]
Yuan J. [1 ,2 ]
Tian J. [1 ,2 ]
Han H.-S. [1 ,2 ]
Sun W. [1 ,2 ]
机构：
[1] School of Minerals Processing and Bioengineering, Central South University, Changsha
[2] Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources, Central South University, Changsha
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2022年 / 32卷 / 08期
关键词：
Armphous FeS; Copper smelting dust; Copper-arsenic separation; Sustained-release sulfide;
D O I：
10.11817/j.ysxb.1004.0609.2022-36746
中图分类号：
学科分类号：
摘要：
The efficient separation of arsenic from valuable metals in copper smelting dust has always been a key problem restricting the utilization of secondary resources. The main factors affecting the selective wet dearsenization of typical copper smelting dust and the sulfurization separation of copper and arsenic in the leachate by armphous FeS instead of traditional sulfurization agent were studied in this paper. The results show that, under the optimal leaching conditions, the leaching of copper in the dust is more than 95%, and the leaching of arsenic is more than 86%. With the prolongation of aging time, the armphous FeS tends to crystallize gradually from amorphous, and its reactivity decreases gradually. Compared with Na2S, FeS can effectively lower the H2S gas escape and improve the crystallization properties of the product based on its good sustained-release effect. The actual leaching experiments show that the copper removal of leaching solution is more than 99%, the arsenic content in copper sulfide product is less than 2%, and the grade of arsenic product is more than 25% using armphous FeS. The armphous FeS provides an alternative for the separation of valuable metals from arsenic in copper smelting dust. © 2022, China Science Publishing & Media Ltd. All right reserved.
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页码：2354 / 2364
页数：10
相关论文
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