(1. 北京科技大学 土木与环境工程学院，北京 100083；
2. 北京科技大学 金属矿山高效开采与安全教育部重点实验室，北京 100083)
摘 要: 为解决硫化矿井下堆存易发生自燃这一问题，进行了高含硫矿石的细菌脱硫试验，对比了不同矿石粒径条件下的脱硫效果，对脱硫反应表面进行了扫描电镜观察，并对细菌脱硫反应进行动力学分析。结果表明：细菌液计脱硫率与矿石粒径呈反比，当矿石粒径为3 mm时，取得了最大脱硫率为22.56%；脱硫反应对矿石表面侵蚀严重，矿石表面的硫含量由43%左右降低至15%以下；6组试验矿石的表面脱硫率均为65%左右，矿石的可燃性降低；反应受内扩散和化学反应共同控制，其中内扩散为主要因素。
关键字: 细菌脱硫；硫化矿；表面脱硫率；动力学
（1. School of Civil and Environment Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Key Laboratory of High-Efficient Mining and Safety of Metal Mines,
Ministry of Education, University of Science and Technology Beijing, Beijing 100083, China）
Abstract:Acidophilus bacteria desulfurization column leaching was used to explore the effect of the desulfurization of metal sulfide ore and the feasibility of inhibiting the spontaneous combustion. The ore surface of the desulfurization of ore with different particles sizes and the kinetics of desulfurization were analyzed. The results show that the bacterial desulfurization rate is inversely proportional to the ore particle size. The desulfurization rate achieves the maximum of 22.56% when the ore particle size is 3mm. The sulfur content of the ore surface reduces from about 43% to 15% or less. The surface desulfurization rate of 6 groups is 65%. The ore surface is eroded severely after the desulfurization reaction. The internal diffusion influences the desulfurization reaction most, followed by the chemical reaction.
Key words: bacterial desulfurization; sulfide ore; surface desulfurization rate; reaction kinetics
