基于浮选原理制备低灰煤的研究进展

结合中国煤炭资源现状及国家产业政策,介绍了低灰煤在中国煤炭深加工利用方面的重要性。阐述了制备低灰煤的原料煤性质,即必须具有内在灰分低、质脆易磨、矿物易于单体解离、可选性好等特点,且原煤中含有灰分小于2%的低灰组分,要尽量选择丝质体含量少且可浮性好的中、高变质程度煤。详细介绍了目前制备低灰精煤的2种方法,即预处理+浮选工艺和浮选柱分选工艺,并对2种分选方法的基本分选原理和分选效果进行了分析。最后论述了制备低灰煤的发展趋势,强调了应注重低灰煤专用、低成本、高效率化学药剂的研发和现有设备脱硫降灰效率的提高,采用严格的质量控制和过程控制来保证精煤的稳定性。

Research progress of low-ash coal preparation based on flotation principle

Combining coal resources status at home with relative industrial policy, introduce the importance of lowash coal to coal further processing and utilization. Raw coal needs to have some qualities such as low inherent ash, easy grinding and dissociation, better washability and the like to meet the needs of low-ash coal preparation. Low-ash component is also needed whose ash content must be below 2% in raw coal. The medium and high ranking coal with better floatability and lower fusinite content should be chosen as far as possible. Two methods of low-ash coal preparation based on floatation principle are described in details as pretreatment-flotation process and flotation column process, the basic principles and separation effects are also analyzed. In conclusion, analyze the development tendency of low-ash coal preparation, emphasize that the plant should pay more attention to the research of lower price and higher efficiency reagents as well as the improvement of desulfuration and ash reducing equipments efficiency. Guarantee the stability of clean coal quality according to stringent quality control and processing control.