煤炭粒度对生物浸出-浮选联合工艺脱硫效果的影响  

Effect of coal particle size on desulphurization effect of bioleaching-flotation combined process

作　　者：袁东旭 樊欣雨 刘雅诗 裴欢欢 田煜 乔星星 刘奋武[1] YUAN Dongxu;FAN Xinyu;LIU Yashi;PEI Huanhuan;TIAN Yu;QIAO Xingxing;LIU Fenwu(College of Resource and Environment,Shanxi Agricultural University,Jinzhong 030801,China)

机构地区：[1]山西农业大学资源环境学院,晋中030801

出　　处：《环境工程学报》2024年第7期1820-1827,共8页Chinese Journal of Environmental Engineering

基　　金：山西省基础研究计划项目(202103021224139)。

摘　　要：煤炭脱硫对减少大气污染及保护人体健康具有重要意义。本研究利用氧化亚铁硫杆菌对3种粒度分别为0.075~0.150、0.280~0.400、0.500~1.000 mm的煤炭进行生物浸出脱硫研究,并探究了生物浸出后煤炭的浮选脱硫效果。结果表明,煤炭生物浸出脱硫效率随煤炭粒度的减小而提高。其中,粒度为0.150~0.075 mm煤炭浸出脱硫效率最高,在第7天和第15天浸出脱硫率分别为34.3%和44.8%。在结合浮选工艺后,煤炭总脱硫率分别提高至43.2%和54.0%。粒度为0.075~0.150 mm与0.280~0.400 mm煤炭的浮选降硫率随着前期浸出脱硫时间的增加而降低,而粒度为0.500~1.000 mm煤炭的浮选降硫率随着前期浸出脱硫时间的增加而提高。此外,浮选脱硫的精煤产率随着煤炭粒度的减小而提高。以上研究结果可为改进煤炭生物脱硫工艺提供数据参考。The coal desulfurization is of great significance to reduce air pollution and protect human health.In this study.In this study,A.ferrooxidans was used to bioleach coals with the particle size distribution of0.075~0.150,0.280~400 and 0.500~1.000 mm,and the flotation desulfurization effect of coal after bioleaching was also explored.The results showed that the smaller the coal particle size,the higher the desulfurization efficiency of coal bioleaching,of which,the highest bioleaching desulfurization efficiency occurred for0.075~0.150 mm coal,and the desulfurization efficiencies were 34.3%and 44.8%on day 7 and day 15,respectively.Combined with the flotation process,the total desulfurization efficiencies increased to 43.2%and54.0%,respectively.The flotation desulfurization efficiency of coal with particle size distribution of0.075~0.150 mm and 0.280~0.400 decreased with the increase of the pre-phase bioleaching desulfurization time,while the flotation desulfurization efficiency of coal with particle sizes distribution of 0.500~1.000 mm increased with the increase of the pre-phase bioleaching desulfurization time.In addition,the yield of clean coal for flotation desulfurization increased with the decrease of coal particle size.

关 键 词：高硫煤 氧化亚铁硫杆菌 生物浸出脱硫 浮选脱硫 

分 类 号：X703[环境科学与工程—环境工程]