小锥角水力旋流器在煤泥预先抛尾中的应用  

Application of small taper angle hydraulic cyclone in coal slime pre-concentration discarding tailings

作　　者：任瑞晨[1] 张乾伟[1] 白阳[1] 张孝松[1] 宋大文[1] 

机构地区：[1]辽宁工程技术大学矿物加工利用与设计研究院,辽宁阜新123000

出　　处：《洁净煤技术》2014年第2期5-9,共5页Clean Coal Technology

基　　金：辽宁省教育厅重点实验室基金资助项目(Ls2010072)

摘　　要：分析了临江选煤厂煤泥性质,说明煤泥中大量细粒、高灰非煤矿物进入浮选系统,是高灰煤泥难以浮选的主要原因。为降低煤泥灰分,减小浮选处理量,通过理论计算和试验应用研究了小锥角水力旋流器在煤泥预先抛尾工艺中应用的可行性。结果表明:150 mm小锥角水力旋流器在给料质量分数15%,给料压力0.25 MPa的条件下,可实现-0.038 mm煤泥的初步分级分选;煤泥经150、75、50 mm小锥角水力旋流器底流串联预处理后,可实现连续降灰。与原煤泥直接浮选相比,煤泥经150 mm小锥角水力旋流器预先抛尾后,其合格精煤泥产率、可燃体回收率和浮选完善指标分别提高6.03%、7.28%和9.99%;入浮煤泥可浮性等级也由难浮提至中等可浮。因此150 mm小锥角水力旋流器用于选煤厂预先抛尾具有可行性。The slime properties of Linjiang coal preparation plant show that,large fine size fraction and high-ash mineral in flotation system are mine obstacle for high-ash slime flotation.Research the pre-concentration discarding tailings feasibility of small taper angle hydraulic cyclone in coal slime pretreatment process in theoretical calculation and experimental practice.Theoretical results show that,when the mass fraction of feed coal is 15 percent,the pressure is 0.25 MPa,the φ150 mm small taper angle hydraulic cyclone can achieve the removal of-0.038 mm high-ash slime.Before flotation,removing high-ash non-coal minerals using small taper angle hydraulic cyclone,the ash content of flotation coal slime can be reduced obviously when the coal slime is separated by φ150 mm,φ75 mm,φ50 mm small taper angle hydraulic cyclone,whose underflow is in series.Through the separation of φ150 mm small taper angle hydraulic cyclone,the underflow enter into the flotation system,comparing with the raw coal slime direct flotation,the fine coal slime production,combustible recovery and flotation perfect index respectively increase by 6.03 percent,7.28 percent and 9.99 percent.So the application of φ150mm small taper angle hydraulic cyclone in coal preparation plant is feasible.

关 键 词：小锥角水力旋流器 预先抛尾 煤泥 浮选 精煤泥 降灰 

分 类 号：TD94[矿业工程—选矿]