气固流化床中磁铁矿粉二次包覆改性后流化特性的研究  

Gas-solid fluidized bed magnetite powder in the second coating modification after fluidization characteristics of research

作　　者：于晓东[1] 郭进[1] 赵跃民[1] 骆振福[1] 王可[1] 张文平[2] 朱再胜[1] 

机构地区：[1]中国矿业大学化工学院,江苏省徐州市221008 [2]山东黄金集团昌邑矿业有限公司,山东省潍坊市261308

出　　处：《中国煤炭》2011年第4期88-91,共4页China Coal

基　　金：国家自然科学基金委员会创新研究群体科学基金(50921002);中国矿业大学中央高校基本科研业务费专项资金项目(No.2010ZDP01A06)

摘　　要：介绍了磁铁矿粉表面利用离子型药剂(油酸钠)改性后再利用非离子性改性药剂(PEG-4000)进行二次包覆改性后的物理化学性质。研究表明,改性前当磁铁矿粉水量为0.5%时流化床已经不能流化,达到了临界水分;改性后磁铁矿粉临界水分可增至0.8%,改善了磁铁矿粉的流化特性,有效地拓宽了入选原煤水分含量。This paper introduces the Physical-Chemical Properties of magnetite powder modified by the non-ionic agent（PEG-4000）after the modification of the magnetite powder using sodium-oleate.The research shows that the air-dense medium fluidized beds can＇t be fluidized when the moisture content of the magnetite powder reaches to 0.5% before the modification.So the critical water content is 0.5%.However,after the modification the critical moisture increases to 0.8% and the fluidization Characteristics is improved.Also the requirement to the moisture content of separated raw coal is relaxed.

关 键 词：干法选煤 磁铁矿粉 二次包覆 表面改性 流化床 水分 

分 类 号：TD942.4[矿业工程—选矿]