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。
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（KC1） 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.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2012年第10期2896-2901,共6页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学基金资助项目(50804056
51174237)
湖南有色集团-中南大学有色金属研究基金资助
关键词
辉锑矿
低温
熔盐
固硫
清洁冶金
stibnite
low-temperature
fused salt
sulfur fixing
clean metallurgy
