(1. 北京科技大學(xué) 土木與環(huán)境工程學(xué)院，北京 100083；
2. 北京科技大學(xué) 金屬礦山高效開采與安全教育部重點(diǎn)實(shí)驗(yàn)室，北京 100083)
摘 要: 為解決硫化礦井下堆存易發(fā)生自燃這一問題，進(jìn)行了高含硫礦石的細(xì)菌脫硫試驗(yàn)，對比了不同礦石粒徑條件下的脫硫效果，對脫硫反應(yīng)表面進(jìn)行了掃描電鏡觀察，并對細(xì)菌脫硫反應(yīng)進(jìn)行動力學(xué)分析。結(jié)果表明：細(xì)菌液計(jì)脫硫率與礦石粒徑呈反比，當(dāng)?shù)V石粒徑為3 mm時(shí)，取得了最大脫硫率為22.56%；脫硫反應(yīng)對礦石表面侵蝕嚴(yán)重，礦石表面的硫含量由43%左右降低至15%以下；6組試驗(yàn)礦石的表面脫硫率均為65%左右，礦石的可燃性降低；反應(yīng)受內(nèi)擴(kuò)散和化學(xué)反應(yīng)共同控制，其中內(nèi)擴(kuò)散為主要因素。
關(guān)鍵字: 細(xì)菌脫硫；硫化礦；表面脫硫率；動力學(xué)
（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
