砷在富氧底吹炼铜过程中的走向及物相结构
Arsenic distribution and phase structure in oxygen-enriched bottom blown copper smelting process
王保仁 1杨洪英 1金哲男 1佟琳琳 1马志远1
作者信息
- 1. 东北大学 多金属矿生态冶金教育部重点实验室,沈阳 110819;东北大学 冶金学院,沈阳 110819
- 折叠
摘要
采用Factsage热力学分析、元素分析、XRD、SEM-EDS及金相显微镜等手段研究了富氧底吹炼铜工艺中砷的走向和物相结构.结果表明:通过适当降低富氧浓度,可以提高熔炼温度增加烟气和烟尘中砷的分配.混合炉料中砷主要存在于毒砂和砷黝铜矿中,少部分存在于返渣的冰铜相和细烟尘中;冰铜中砷主要以含砷锑冰铜形式存在,平均砷含量为4.75%(质量分数);粗铜中砷主要与铜、锑、铅等形成固溶体,平均砷含量为7.78%;底吹炉渣中砷主要分布于渣相所含的含砷锑冰铜(26.38%)中,少部分存在于玻璃相基底(1.73%)和铁橄榄石相(2.08%)中;磁选前渣中砷主要存在于渣中的复杂含砷冰铜相中,大部分被渣包裹,平均砷含量为37.26%.
Abstract
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%.
关键词
砷/富氧底吹炼铜/工艺矿物学/赋存状态Key words
arsenic/oxygen-enriched bottom blowing copper smelting/process mineralogy/occurrence state引用本文复制引用
基金项目
国家自然科学基金(52274348)
辽宁省"揭榜挂帅"科技计划(2022JH1/10400024)
出版年
2024
NETL
NSTL
维普
万方数据