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中南大学学报(自然科学版)

Journal of Central South University

第50卷    第7期    总第299期    2019年7月

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文章编号:1672-7207(2019)07-1527-10
铜浮渣富集熔炼过程金属分配行为
肖辉1,谢博毅1,陈霖1, 2,王志雄2,刘伟锋1,张杜超1,杨天足1

(1. 中南大学 冶金与环境学院,湖南 长沙,410083;
2. 湖南金旺铋业股份有限公司 博士后科研流动站协作研发中心,湖南 郴州,423000
)

摘 要: 针对铜浮渣传统火法处理工艺存在能耗高,环保效果差,铅和铜分离不彻底的问题,采用熔池熔炼工艺处理铜浮渣,研究熔池熔炼过程中铁硅比(m(FeO)/m(SiO2))、钙硅比(m(CaO)/m(SiO2))、硫加入量、铁屑加入量、煤粉加入量和碳酸钠加入量对Pb,Cu,Bi,As,Sb和Sn元素分配的影响,并对熔炼产物渣相和锍相的物相组成进行检测。研究结果表明:在m(FeO)/m(SiO2)为1.9,m(CaO)/m(SiO2)为0.6,硫加入量为铜浮渣的3%,铁屑加入量为10%,煤粉加入量为5%,Na2CO3加入量为6%的最优条件下,Pb,Bi和Sb主要进入粗铅中,其在粗铅中的分配率分别为83.43%,99.09%和43.62%,Cu和As主要进入冰铜中,其在冰铜中的分配率分别为44.10%和88.80%,Sn主要进入烟气中,其在烟气中的分配率为78.58%。As易与Fe形成Fe-As相嵌入冰铜相中。

 

关键词: 铜浮渣;粗铅;火法精炼;熔池熔炼;元素分配

Metal distribution behavior in copper dross smelting for enrichment
XIAO Hui1, XIE Boyi1, CHEN Lin1, 2, WANG Zhixiong2, LIU Weifeng1, ZHANG Duchao1, YANG Tianzu1

1. School of Metallurgy and Environment, Central South University, Changsha 410083, China;
2. Hunan Jinwang Bismuth Industry Co., Ltd., R & D Center of Post-doctoral Research Station, Chenzhou 423000, China

Abstract:Based on the high energy consumption, poor environmental protection, and incomplete separation of lead and copper in the traditional pyrometallurgy process of copper dross, the effects of m(FeO)/m(SiO2), m(CaO)/m(SiO2), sulfur dosage, scrap iron dosage, coal dosage, and sodium carbonate dosage on elements distribution behaviors of Pb, Cu, Bi, As, Sb, and Sn in the smelting process were investigated by the bath smelting process. The phase composition of the slag and matte were detected. The results show that the optimum condition of bath smelting process is as follows: m(FeO)/m(SiO2) of 1.9, m(CaO)/m(SiO2) is 0.6, the mass fraction of sulfur to copper dross is 3%, the mass fraction of scrap iron to copper dross is 10%, the mass fraction of coal dosage to copper dross is 5%, the mass fraction of sodium carbonate to copper dross is 6%. Under the optimum condition, Pb, Bi and Sb are mainly distributed into the metal. The distribution ratios of Pb, Bi and Sb in metal are 83.43%, 99.09% and 43.62%, respectively. Meanwhile, Cu and As are mainly distributed into the matte. The distribution ratios of Cu and As in matte are 44.10% and 88.80%, respectively. Sn is mainly distributed into the gas. The distribution ratio of Sn in gas is 78.58%. As is easy to form Fe-As phase embedded in matte.

 

Key words: copper dross; crude lead; fire refining; bath smelting; elements distribution

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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