Effect of Grinding Conditions on the Performance of a Selective Agglomeration Process for Physical Coal Cleaning
Effect of Grinding Conditions on the Performance of a Selective Agglomeration Process for Physical Coal Cleaning
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DOI：
10.1080/07349349108960563
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
S. Kim;B. Morsi;G. Araujo;S. Chiang;J. Blachère;A. Sharkey
中科院分区：
文献类型：
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作者：
S. Kim;B. Morsi;G. Araujo;S. Chiang;J. Blachère;A. Sharkey
摘要采用正戊烷作粘结剂，研究了磨矿条件对选择性附聚过程性能的影响。使用粉碎机、陶瓷罐磨机和专门设计的搅拌球磨机将Upper Freeport、Pittsburgh #8和Illinois #6煤样品干磨和湿磨至28目× 0和200目× 0粒度。使用Waring混合器作为附聚单元，对研磨的样品进行标准化附聚测试程序。各种操作变量，如正戊烷煤比，浆料浓度，混合速度，和团聚时间的能量回收和灰分排斥的影响进行了统计评估。团聚试验数据表明，湿法和干法研磨方法之间以及28目× 0和200目× 0粒度之间存在显着差异。粉碎至200目× 0时，能量回收率较高。采用湿法研磨法获得的200目× 0粒度的超细粉体具有良好的分散性能。
Abstract An extensive experimental study was conducted to investigate the effect of grinding conditions on the performance of a selective agglomeration process using n-pentane as agglomerant. Upper Freeport, Pittsburgh # 8, and Illinois # 6 coal samples were dry and wet ground to 28 mesh × 0 and 200 mesh × 0 particle sizes using a pulverizer, a ceramic jar mill, and a specially designed stirred-ball mill. The ground ;, samples were subjected to a standardized agglomeration test procedure using a Waring blender as the agglomeration unit. The effects of various operating variables, such as n-pentane to coal ratio, slurry concentration, mixing speed, and agglomeration time on energy recovery and ash rejection were statistically evaluated. The agglomeration test data showed dramatic differences between wet and dry grinding methods and between 28 mesh × 0 and 200 mesh × 0 particle sizes. Grinding to 200 mesh × 0 resulted in higher energy recoveries. Moreover, 200 mesh × 0 particle size obtained with wet grindi...