APPLICATION OF CENTRIFUGAL WASHING FOR FINE-COAL CLEANING

被引：8

作者：

HONAKER, RQ ^{[1
]}

PAUL, BC ^{[1
]}

WANG, D ^{[1
]}

HUANG, M ^{[1
]}

机构：

[1] SO ILLINOIS UNIV,DEPT MIN ENGN,CARBONDALE,IL 62901

来源：

MINERALS AND METALLURGICAL PROCESSING | 1995年 / 12卷 / 02期

关键词：

D O I：

10.1007/BF03403082

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Froth flotation is now the most commonly used method for cleaning fine-coal fractions in coal-preparation plants. Past research and industrial practice have demonstrated that froth flotation achieves excellent separation efficiencies for fine coals having only a small fraction of middling particles. However, the efficiency of froth flotation decreases sharply as the concentration of middling particles increases. This is due to the flotation of high-ash particles that have a small amount of hydrophobic coal present at the surface. Because gravity-based processes are much more efficient for the treatment of middlings, the application of centrifugal washing for fine-coal cleaning was studied with an emphasis on the primary cleaning of fine-circuit feed. Results are shown of a parametric study that used a semibatch Falcon centrifugal concentrator. The results of the study revealed that separation performance is a function of particle size, bowl geometry, feed solids content and feed rate.

引用

页码：80 / 84

页数：5