(1. 中南大学 冶金科学与工程学院，长沙 410083;
2. 广西堂汉锌铟股份有限公司 博士后科研工作站，南丹 547200)
摘 要: 采用低温固硫熔炼新工艺对辉锑矿一步熔炼进行研究。结果表明：在液固比为5(质量比)、m(Na2CO3)/m(KCl)为4(质量比)、粉煤质量过量系数为2倍、ZnO质量过量系数为1.2倍、熔炼温度为850 ℃、熔炼时间为2 h的最优条件下，Sb的直收率为90%(质量分数)，粗锑品位为92%(质量分数)，辉锑矿中的硫以ZnS的形态固定于渣中，渣中硫固定量为84%(质量分数)。较传统冶火法炼锑工艺，熔炼温度降低350 ℃以上，降低了能耗，解决了辉锑矿熔炼过程中低浓度SO2污染的问题。
关键字: 辉锑矿；低温；熔盐；固硫；清洁冶金
（1. School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China;
2. Post-doctoral Scientific Research Center, Guangxi Tanghan Zinc and Indium Co., Ltd., Nandan 547200, China）
Abstract:A low-temperature and sulfur-fixing smelting process was applied to separate antimony from stibnite. The results show that the direct recovery rate of Sb is 90%(mass fraction), and the grade of Sb is 92%(mass fraction), and the sulfur fixing in solid slag is 84% (mass fraction) as ZnS under the following optimum conditions: liquid-solid ratio 5 (mass ratio), m(Na2CO3)/m(KCl) for 4 (mass ratio), quality excessive coefficient of pulverized coal for 2 times, quality excessive coefficient of ZnO for 1.2 times, smelting temperature for 850 ℃, smelting time for 2 h. Compared with the traditional methods of pyrometallurgy of antimony, this process can not only lower smelting temperature more than 350 ℃ and save energy consumption significantly, but also considerably reduce the atmospheric emissions of low-concentration sulfur dioxide.
Key words: stibnite; low-temperature; fused salt; sulfur fixing; clean metallurgy
