煤泥磨矿分级浮选及高岭土回收试验研究  

Experimental study on flotation of milled and classified fine slime and recovery of kaolinite

作　　者：田立新[1] 李守山[1] 任瑞晨[2] TIAN Lixin;LI Shoushan;REN Ruichen(Kailuan Liability Limited Corporation,Tangshan 063000,China;Liaoning University of Engineering&Technology,Fuxin 123000,China)

机构地区：[1]开滦集团有限责任公司,河北唐山063000 [2]辽宁工程技术大学,辽宁阜新123000

出　　处：《选煤技术》2021年第1期126-130,共5页Coal Preparation Technology

摘　　要：为提高浮选精煤质量和产率,充分利用煤系伴生矿物,通过对林西矿选煤厂浮选入料进行磨矿解离和浮选试验研究,制定了“浮选入料磨矿+旋流器分级脱泥+旋流器底流浮选+旋流器溢流磁选”提纯回收高岭土工艺流程。该工艺控制浮选入料磨矿细度为>0.0374 mm占60%,对解离后的浮选入料依次采用Ф150、Ф75、Ф50、Ф10 mm的小锥角旋流器进行分级脱泥,旋流器底流进行浮选,旋流器溢流进行1.3 T高梯度磁选提纯,并对提纯产物采用980℃温度煅烧。试验结果表明:采用该工艺方法,既可以使煤泥中细粒级黏土得到有效分离,为煤泥浮选创造有利的条件,提高煤泥浮选效率和精煤质量,又可回收高岭土,从而为高灰超细煤泥的综合利用提供了一种新的技术途径。For enhancing flotation concentrate quality and yield,and making full use of associated coal-measure mineral,a study is made by Linxi Coal Preparation Plant on flotation of fine coal after it is liberated through grinding.Based on study result,a combined process of flotation of milled feed+classification and desliming with cyclone+cyclone underflow flotation+magnetic separation of cyclone overflow for purification and recovery of kaolinite,is proposed.The milled flotation feed with the 0.0374 mm size accounting for 60%of the total is sent sequentially to theФ150,Ф75,Ф50 andФ10 mm small-conical-angle cyclones for classification and desliming.The underflow materials of the cyclones are then treated through flotation.The overflow of theФ10 mm cyclone is purified through high-gradient magnetic separation.The refined material is finally caleinated at a temperature of 980℃.Test result shows the use of the proposed process makes it possible to create not only a favorable flotation condition,improved flotation efficiency and concentrate quality because of the effective separation of fine clay,but also a possibility to recover kaolinite.The application of the combined process proves to be a new approach for comprehensive utilization of ultrafine high-ash coal.

关 键 词：煤泥浮选 磨矿 小锥角旋流器 高岭土 

分 类 号：TD942[矿业工程—选矿] TD943