对于质量效率这一重力分选工艺指标的探讨  

Discussion on the gravity separation process index of quality efficiency

作　　者：张玉磊 耿浩 吴大为 ZHANG Yu-lei;GENG Hao;WU Da-wei(Beijing Guohua Technology Group Co.Ltd.,Beijing 101300,China)

机构地区：[1]北京国华科技集团有限公司,北京101300

出　　处：《煤炭加工与综合利用》2022年第5期1-5,10,共6页Coal Processing & Comprehensive Utilization

摘　　要：精煤数量效率是我国一直沿用的评定重力选煤设备工艺效果的重要指标,但存在未反映非目的物料混杂情况的缺陷,因此提出采用质量效率来取代这一指标。根据可选性曲线查得轻、重产物的分界灰分,将原料煤分为小于分界灰分及大于分界灰分两部分,按汉考克分离效率公式,计算出轻产物或重产物中以上两种物料的正配率和错配率,从而得到质量效率,该指标基于现有的试验方法和数据处理,为业内人士熟知。The quantity efficiency of cleaned coal is an important index used to evaluate the process effect of gravity coal preparation equipment in China,but there is a defect that it does not reflect the mixing of non target materials.Therefore,it is proposed to replace this index with quality efficiency.According to the separability curve,the boundary ash content of light and heavy products is checked.The raw coal is divided into two parts:less than the boundary ash content and more than the boundary ash content.According to the Hancock separation efficiency formula,the positive matching rate and mismatch rate of the above two materials in light products or heavy products are calculated,so as to obtain the mass efficiency.This index is well known in the industry based on the existing test methods and data processing.

关 键 词：质量效率 数量效率 可选性曲线 分界灰分 正配率 错配率 

分 类 号：TD942[矿业工程—选矿]