Research on super-low-ash anthracite preparation  

作　　者：WANG Yu-ling ZHAO Yue-min YANG Jian-guo 

机构地区：[1]School of Chemical Engineering and Technology, China University of Mining ＆ Technology, Xuzhou, Jiangsu 221116, China

出　　处：《Journal of China University of Mining and Technology》2008年第4期580-583,共4页中国矿业大学学报（英文版）

基　　金：Project 2004300z019 supported by the Ningxia Municipal Torch Science and Technology

摘　　要：The fundamental question of super-low-ash coal preparation is how to furthest depress high ash component pollution. A jigging process was used to remove high ash refuse and middling, then a high precision heavy medium cyclone was used to further separate near gravity light material. A two-stage heavy medium cylindrical cyclone with the same separation density was used to increase the precision of separation. The feed was de-slimed and fine-grind coal was added with media to improve the stability of the suspension. The pump frequency conversion timing and an air spring were used to steady the cyclone inlet pressure. Based on a series of study and pilot tests, a 1.00 Mt/a (output) commercial separation system with Ep value under 0.015 was built up. Super low ash (Ad≤2.00%) Taixi Anthracite has been put into commercial production.The fundamental question of super-low-ash coal preparation is how to furthest depress high ash component pollution, A jigging process was used to remove high ash refuse and middling, then a high precision heavy medium cyclone was used to further separate near gravity light material. A two-stage heavy medium cylindrical cyclone with the same separation density was used to increase the precision of separation. The feed was de-slimed and fine-grind coal was added with media to improve the stability of the suspension. The pump frequency conversion timing and an air spring were used to steady the cyclone inlet pressure. Based on a series of study and pilot tests, a 1.00 Mt/a （output） commercial separation system with Ep value under 0.015 was built up. Super low ash （Ad≤2.00%） Taixi Anthracite has been put into commercial production.

关 键 词：super low ash anthracite heavy medium separation CYCLONE separation precision 

分 类 号：TD82[矿业工程—煤矿开采]