(1. 中南大學(xué) 冶金科學(xué)與工程學(xué)院，長沙 410083;
2. 廣西堂漢鋅銦股份有限公司 博士后科研工作站，南丹 547200)
摘 要: 采用低溫固硫熔煉新工藝對輝銻礦一步熔煉進(jìn)行研究。結(jié)果表明：在液固比為5(質(zhì)量比)、m(Na2CO3)/m(KCl)為4(質(zhì)量比)、粉煤質(zhì)量過量系數(shù)為2倍、ZnO質(zhì)量過量系數(shù)為1.2倍、熔煉溫度為850 ℃、熔煉時間為2 h的最優(yōu)條件下，Sb的直收率為90%(質(zhì)量分?jǐn)?shù))，粗銻品位為92%(質(zhì)量分?jǐn)?shù))，輝銻礦中的硫以ZnS的形態(tài)固定于渣中，渣中硫固定量為84%(質(zhì)量分?jǐn)?shù))。較傳統(tǒng)冶火法煉銻工藝，熔煉溫度降低350 ℃以上，降低了能耗，解決了輝銻礦熔煉過程中低濃度SO2污染的問題。
關(guān)鍵字: 輝銻礦；低溫；熔鹽；固硫；清潔冶金
（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
