脉石在硫化锑精矿低温熔炼过程中的行为

黄潮，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：为开发清洁的硫化锑矿低碳冶金方法，在热力学理论计算的基础上，采用XRD分析和DSC-TGA热分析技术，研究硫化锑精矿低温熔盐熔炼过程中SiO₂，CaCO₃，Al₂O₃，MgCO₃和FeS₂等脉石成分的行为。研究结果表明：二氧化硅全部生成可溶性的Na₂SiO₃，MgCO₃在850 ℃时分解，不与Na₂CO₃反应。CaCO₃，Al₂O₃和FeS₂部分发生反应，消耗Na₂CO₃熔盐，在熔炼实验中需要不断补加Na₂CO₃。

关键词：硫化锑精矿；低温熔盐冶金；脉石行为；XRD

Behavior of gangue during antimony separation from stibnite concentrate through a low temperature smelting

HUANG Chao, 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:To develope a low carbon clean metallurgical method for antimony sulfide ore, the behaviors of gangue including SiO₂, CaCO₃, Al₂O₃, MgCO₃ and FeS₂ were investigated by XRD analysis and DSC-TGA thermal analysis techniques on the basis of thermodynamic calculations during antimony separation from stibnite concentrate through a low temperature smelting. The results show that all the silicon generates soluble Na₂SiO₃ and MgCO₃ decomposes and does not react with Na₂CO₃. CaCO₃, FeS₂ and Al₂O₃ partly react and consume part of the molten Na₂CO₃. Smelting experiments need to keep adding Na₂CO₃.

Key words:stibnite concentrate; low-temperature molten salt metallurgy; gangue behavior; XRD