摘要
我国2/3以上的煤炭资源分布在西部干旱缺水地区,迫切需要高效的干法选煤技术。新一代干法重介质流化床分选机是以磁铁矿粉和煤粉为二元宽粒级加重质,以空气为流化气体,形成具有一定密度的流化床层,进入到分选机中的煤炭按密度进行分层,实现高效干法选煤,新一代分选机解决了布风板易堵塞的难题,具有流化床密度均匀稳定、加重质循环量小、整机可靠性高的特点。中国矿业大学与唐山市神州机械有限公司合作开发,建立了模块式干法重介质流化床选煤厂,实现了干法选煤技术生产超低灰精煤的工业应用。工业应用结果表明,采用模块式干法重介质流化床选煤系统生产超低灰精煤,精煤灰分为3.46%,可能偏差E值为0.055g/cm3,数量效率>90%,具有不用水、分选精度高、工艺简单、投资和运行成本低、能耗小等特点。
In China,about 2/3coal reserves in the west region,where water shortage is a serious problem.High-efficiency dry coal beneficiation technology is desiderated.Using magnetic powder and fine coal as heavy medium,and using air as the fluidizing agent,a novel air dense medium fluidize bed separator was proposed for coal preparation.Coal could be separated efficiently according to its density in the fluidized bed,which bed density is steady.The reliability of the separator is high,circulation quantity of heavy medium is less,and the gas distributor can not be blocked easily.The industrial modularized dry coal preparation plant was built by China University of Mining and Technology and Tangshan Shenzhou Manufacturing Co.,Ltd..And dry coal beneficiation technology was used to produce low-ash coal.Results of industrial production show that the ash content of clean coal is 3.46%,the probable error Evalue is 0.055g/cm3,and the organic efficiency is over90%.The advantages of the modularized dry coal beneficiation system are the high separation accuracy,the simple process flow,the low operation cost,low energy consumption,and so on.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2014年第8期1566-1571,共6页
Journal of China Coal Society
基金
国家重点基础研究发展计划(973)资助项目(2012CB214904)
国家自然科学基金委创新研究群体项目(51221462)
国家自然科学基金委-神华集团"煤炭联合基金"重点资助项目(51134022)
关键词
模块式
干法选煤
重介质
流化床
超低灰煤
module
dry coal beneficiation
heavy medium
fluidized bed
low-ash coal
