煤泥半焦浮选提质试验研究  

Quality improving from slime semi-coke by flotation

作　　者：刘立伟 张锦瑞 赵礼兵 李国峰 LIU Liwei;ZHANG Jinrui;ZHAO Libing;LI Guofeng(College of Mining Engineering,North China University of Science and Technology,Tangshan 063210,China)

机构地区：[1]华北理工大学矿业工程学院

出　　处：《中国矿业》2019年第9期85-90,96,共7页China Mining Magazine

基　　金：国家自然科学基金项目资助(编号:51804123);华北理工大学研究生创新项目资助(编号:2017B18);华北理工大学博士科研启动基金资助(编号:28411499)

摘　　要：针对煤泥低温热解制备的半焦产品灰分较高、粒度较细的特点,采用浮选法对其进行提质降灰处理。确定浮选试验最佳药剂用量为煤油1 200 g/t、曲拉通X-100 200 g/t、仲辛醇100 g/t,最终获得了灰分为21.08%、产率75.67%、可燃体回收率82.93%的精煤产品。通过SEM和EDS检测,发现低密度、灰分高的表面带有细小的脉石矿物组分和复杂表面结构的煤泥半焦颗粒,在浮选过程中随-1.0 g/cm 3密度级半焦混入泡沫产品在浮选精煤中得到富集,这是导致浮选精煤灰分较高的主要原因之一。Semi-coke produced from coal slime by low temperature pyrolysis is characterized by small particle size and high ash content.The flotation method is adopted to decrease the ash.The optimum reagent system determined for flotation is kerosene 1 200 g/t,triton X-100 200 g/t,and octanol 100 g/t.The clean coal with ash content 21.08%,productivity 75.67%,combustible recovery 82.93% is obtained.After analyzing by SEM and EDS,it is found that the semi-coke grain is of low density and high ash content.On its surface,there are many fine gangue mineral compositions and complex surface structures.The semi-coke grains are concentrated with -1.0 g/cm 3 products mixing in the froth product in the process of flotation.

关 键 词：煤泥 半焦 灰分 浮选 

分 类 号：TD94[矿业工程—选矿]