块煤重介浅槽分选机在田庄选煤厂的应用

Application of lump coal dense-medium shallow-slot separator in Tianzhuang coal preparation plant

针对田庄选煤厂块煤再选工艺系统中存在的问题,选用2台MZC8/54型块煤重介浅槽分选机代替原001再选斜轮分别作为戊组和己组块煤再选设备,在不增加厂房空间的基础上,分别建立了2套独立的块煤主再选系统和主选"直通"选煤工艺,有效解决了当前块煤系统的瓶颈,提高了入选产能。阐述了MZC8/54型块煤重介浅槽分选机的结构、技术特征及工作原理,并分析了该设备在田庄选煤厂块煤再选工艺中的应用效果。结果表明:MZC8/54型块煤重介浅槽分选机投入运行以来,块煤主再选工艺更灵活,块煤再选工艺影响时间从技改前每月2.2 h减少为零;实现了主再选双系统的并行运行,年处理能力由370万t提高至1000万t;厂房布置简洁,煤流顺畅,方便生产管理;增设了"直通"选煤工艺,减少了转载环节对现有生产系统的影响,增加了系统的可靠性。改造后田庄选煤厂每年创造效益约280万元,每年节约选煤成本约1000万元。

To resolve problems in recleaning process of Tianzhuang coal preparation plant,replace 001 inclined lifting wheel separator with two MZC8/54 lump coal dense-medium shallow-slot ones,which serve to reclean E and F group lump coal.In order to increase productivity,build separately two independent primary cleaning and recleaning system without expanding workshop.Introduce the structure,characteristics,working principle and flotation effect of the new separator.The results show that,the operation becomes more flexible,the primary and recleaning process could run in parallel.The addition of direct connection flotation process helps to reduce the intermediate links and increase the reliability.There is no influence time while it was 2.2 h every day before transformation,the processing capacity increases from 3.7 million tons to 10 million tons,the plant saves flotation cost 10 million yuan,generates benefits 2.8 million yuan.