邢台矿选煤厂中煤再选技术方案的探讨  

An investigation into the middlings rewashing technical scheme at Xingtai Mine Coal Preparation Plant

作　　者：曹辉 王飞飞 CAO Hui;WANG Feifei(Tangshan Research Institute Co.Ltd.,China Coal Technology&Engineering Group,Tangshan 063012,China;Hebei Province Coal Preparation Engineering&Technology Research Center,Tangshan 063012,China)

机构地区：[1]中煤科工集团唐山研究院有限公司,河北唐山063012 [2]河北省煤炭洗选工程技术研究中心,河北唐山063012

出　　处：《选煤技术》2020年第5期70-73,共4页Coal Preparation Technology

基　　金：中国煤炭科工集团有限公司科技创新创业资金专项青年项目资助项目(2018QN030)。

摘　　要：针对邢台矿选煤厂中煤再利用的问题,对再选技术方案进行了可行性分析。在分析了目前国内外关于中煤再选的两种技术方案的基础上,将中煤分别破碎至13 mm及6 mm以下进行浮沉试验;通过数据对比得出,当中煤破碎至6 mm以下时,精煤产率最大,因此宜采用中煤破碎后直接分选的方案。据测算,当采用有压两产品重介质旋流器进行分选,每年可增加精煤产量1.24万t,经济效益显著。In order to explore the feasibility of rewashing the middling product of the plant,an analysis is made of the effect that can be obtained by reducing through crushing the size of middlings to be rewashed down to 13 mm or below 6 mm—2 different technical methods currently adopted both within and abroad.Result of float-and-sink analysis and data comparison show that a maximum yield of clean coal can be obtained in the case of rewashing the middlings at a feed size of<6 mm.Thus,it is decided to adopt the scheme of direct rewashing crushed middlings using 2-product heavy medium cyclone.Implementation of the scheme has led to an increase of clean coal yield by 12,400 tons per year,greatly improving,as a result,the economic performance of the plant.

关 键 词：中煤再选 再选技术方案 精煤产率 重介质旋流器 分选工艺 

分 类 号：TD94[矿业工程—选矿]