中煤可再选性类型划分与再选原则工艺的选择  

Classification of middlings washability and the principle process of middlings

作　　者：巩林盛 李琛光 陈林浩 程江 

机构地区：[1]山西焦煤集团有限责任公司,山西太原030024 [2]中国矿业大学化工学院 [3]中国矿业大学机电工程学院,江苏徐州221116

出　　处：《煤炭加工与综合利用》2017年第9期17-21,共5页Coal Processing & Comprehensive Utilization

基　　金：国家科技支撑计划(项目编号2014BAB01B02)

摘　　要：论述了炼焦煤中煤可再选性类型划分的必要性和可行性,提出以破碎上限为6 mm对中煤破碎后,依据6~0.5 mm物料理论精煤灰分为A%时的理论精煤产率γ-A,将中煤可再选性类型划分为易选、中等可选、较难选、难选和极难选5种类型;将中煤进行初步破碎实验,即可初步确定中煤再选价值以及应当采取的再选原则工艺;3种再选原则工艺为:重选+浮选工艺、细磨+浮选工艺和阶段碎磨重浮联合复杂工艺,可依据中煤的可再选性类型以及选煤厂实际情况选择相应工艺。This paper discusses the necessity and the feasibility of the classification of middlings washability for coking coal preparation.It is proposed that the classification of the 6-0.5mm middlings washability can be divided into five types, which are easy type,medium type, moderately difficult type, difficult type and exceedingly difficult type according to the theoretic ash A% and theoretic yield y.A of middlings crushed to less than 6 mm. If the middlings is preliminary crushed in the lab, the value of middlings preparation and the suitable principle process will be determined initially. There are three types of principle process, which are the gravity separation + flotation process,the fine grinding + flotation process and the crushing, grinding +gravity separation + flotation process. How to select the appropriate principle process is based on the type of middlings washability and the actual situation of coal preparation plant.

关 键 词：炼焦煤 中煤 再选 可再选性类型 原则工艺 

分 类 号：TD942[矿业工程—选矿]