摘要
通过原煤筛分试验和浮沉试验对原煤性质进行了分析,发现煤质地较脆、易碎,矸石不易泥化,工艺设计中需防止原煤过粉碎,适合采用选前脱泥工艺。平煤八矿选煤厂存在入选来煤杂物多、破碎机磨损快、介耗高等问题,这主要是由不合理的入选来煤全粒级破碎工艺和原煤不脱泥入选工艺造成的,通过改进原煤准备工艺,增加原煤分级破碎、除杂、脱泥环节对选煤厂进行了改造。最后对选煤厂改造效果进行了分析,结果表明:选煤厂改造完成后,有效去除了来煤杂物,改善了破碎机工作状况;避免了原煤过粉碎,减少了-0.5 mm煤粉的产生量;原煤分选效果得到改善,精煤产率有所提高,每年可增加精煤销售收入5040万元;重介系统介耗降低了2.09 kg/t,每年可节约生产成本1091万元。
Analyse the raw coal properties through screen analysis and float-and-sink analysis.The results show that,the coal is fragile and the argillization of gangue is also difficult.Desliming process should be designed before preparation to avoid over crushing.The unreasonable crushing technology without preliminary screening and raw coal preparation without desliming lead to bad consequences such as lots of impurities in raw coal,quick-wearing of crusher,large medium consumption.So the pretreatment of raw coal is an essential process.Transform the coal preparation plant by adding graded crushing,decontaminating and desliming process.After transformation,the impurities in raw coal largely decrease,the working life of crusher is longer,the coal fines below 0.5 mm remarkably drop.With the increase of clean coal yield,the coal preparation plant earn more 50.40 million yuan per year,the dense-medium consumption decrease by 2.09 kg/t,saving production cost 1.091 million yuan.
出处
《洁净煤技术》
CAS
2012年第4期23-25,43,共4页
Clean Coal Technology
关键词
脱泥
介耗
原煤准备
分级破碎
除杂
dslime
medium consumption
raw coal pretreatment
preliminary crushing
decontaminating
