Arsenic distribution and phase structure in oxygen-enriched bottom blown copper smelting process

被引：0
|
作者：
Wang B. [1 ,2 ]
Yang H. [1 ,2 ]
Jin Z. [1 ,2 ]
Tong L. [1 ,2 ]
Ma Z. [1 ,2 ]
机构：
[1] Key Laboratory for Ecological Metallurgy of Multi-metallic Mineral, Education Ministry, Northeastern University, Shenyang
[2] School of Metallurgy, Northeastern University, Shenyang
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2024年 / 34卷 / 03期
基金：
中国国家自然科学基金;
关键词：
arsenic; occurrence state; oxygen-enriched bottom blowing copper smelting; process mineralogy;
D O I：
10.11817/j.ysxb.1004.0609.2023-44439
中图分类号：
学科分类号：
摘要：
The phase structure and arsenic distribution in the oxygen-enriched bottom blowing copper smelting process were investigated using Factsage thermodynamic analysis, elemental analysis, XRD, SEM-EDS and metallographic microscopy. The results show that the distribution of arsenic in flue gas and soot can be increased by appropriately reducing the oxygen enrichment concentration and increasing the melting temperature. The arsenic in the feed is predominantly contained in arsenopyrite and tennantite minerals. A minor portion is also found in the matte phase and fine smoke dust of the recycled slag. The arsenic in the matte primarily takes the form of arsenic-antimony matte, with an average arsenic content of 4.75%. Within blister copper, arsenic mainly forms solid solution with copper, antimony and lead, and the average arsenic content is 7.78%. The arsenic in the bottom-blown slag mainly exists as arsenic-antimony matte (26.38%) within the slag phase. A small fraction is present in the glass phase substrate (1.73%) and the iron olivine phase (2.08%). The arsenic in the slag before magnetic separation is mainly situated in the complex arsenic-bearing matte phase, with a significant portion encapsulated by the slag, resulting in an average arsenic content of 37.26%. © 2024 Central South University of Technology. All rights reserved.
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页码：908 / 922
页数：14
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