硫化锑精矿低温熔炼新工艺
来源期刊：中南大学学报(自然科学版)2012年第9期
论文作者：叶龙刚 唐朝波 唐谟堂 杨建广 陈永明 杨声海 何静
文章页码：3338 - 3343
关键词：硫化锑精矿；低温熔盐熔炼；固硫；清洁冶金
Key words：stibnite concentrate; low-temperature molten salt smelting; sulfur fixing; clean metallurgy
摘 要：针对我国现行火法炼锑工艺所存在的冶炼温度高、流程长和低浓度SO2烟气污染严重等弊端，提出一种新的火法炼锑工艺--硫化锑精矿低温熔盐熔炼。采用单因素实验法分别考察熔盐组成、熔炼温度、熔炼时间、熔盐量及固硫剂ZnO加入量对金属锑直收率和粗锑品位的影响。获得优化实验条件如下：熔炼温度为850 ℃，w(Na2CO3)/w(固体物)=5:1，w(Na2CO3)/w(NaCl)=0.75，w(ZnO)/w(理论量) =1.0，反应时间为1 h。在此优化条件下进行综合扩大试验，锑的直收率为84.42%，所得粗锑品位为86.66%。
Abstract: In view of serious shortcomings existing in current antimony pydrometallurgical process such as complex operation, high smelting temperature and low concentrations SO2 fume pollution, a low-temperature molten salt smelting process to directly produce antimony was proposed in this work. Effects of molten salt composition, smelting temperature, reaction time, salt amount, and ZnO addition on the molten salt smelting of stibnite concentrate were investigated. The optimum conditions is determined as follows: w(Na2CO3)/w(NaCl)=0.75, temperature 850 ℃, reaction time 1 h, w(Na2CO3)/w(solids)=6:1, w(ZnO)/w(theory)=1.0. Under above-mentioned optimum conditions, the average direct recovery ratio of antimony is 84.42%, and the average grade of crude antimony is 86.66%.
叶龙刚，唐朝波，唐谟堂，杨建广，陈永明，杨声海，何静
(中南大学 冶金科学与工程学院，湖南 长沙，410083)
摘 要：针对我国现行火法炼锑工艺所存在的冶炼温度高、流程长和低浓度SO2烟气污染严重等弊端，提出一种新的火法炼锑工艺--硫化锑精矿低温熔盐熔炼。采用单因素实验法分别考察熔盐组成、熔炼温度、熔炼时间、熔盐量及固硫剂ZnO加入量对金属锑直收率和粗锑品位的影响。获得优化实验条件如下：熔炼温度为850 ℃，w(Na2CO3)/w(固体物)=5:1，w(Na2CO3)/w(NaCl)=0.75，w(ZnO)/w(理论量) =1.0，反应时间为1 h。在此优化条件下进行综合扩大试验，锑的直收率为84.42%，所得粗锑品位为86.66%。
关键词：硫化锑精矿；低温熔盐熔炼；固硫；清洁冶金
YE Long-gang, TANG Chao-bo, TANG Mo-tang, YANG Jian-guang, CHEN Yong-ming, YANG Sheng-hai, HE Jing
(School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China)
Abstract:In view of serious shortcomings existing in current antimony pydrometallurgical process such as complex operation, high smelting temperature and low concentrations SO2 fume pollution, a low-temperature molten salt smelting process to directly produce antimony was proposed in this work. Effects of molten salt composition, smelting temperature, reaction time, salt amount, and ZnO addition on the molten salt smelting of stibnite concentrate were investigated. The optimum conditions is determined as follows: w(Na2CO3)/w(NaCl)=0.75, temperature 850 ℃, reaction time 1 h, w(Na2CO3)/w(solids)=6:1, w(ZnO)/w(theory)=1.0. Under above-mentioned optimum conditions, the average direct recovery ratio of antimony is 84.42%, and the average grade of crude antimony is 86.66%.
Key words:stibnite concentrate; low-temperature molten salt smelting; sulfur fixing; clean metallurgy
