Fine coal dry classification and separation
Fine coal dry classification and separation
复制标题
细煤干法分级分离
DOI：
10.1007/bf03403330
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
中科院分区：
文献类型：
--
作者：
随着环境保护的要求，煤炭的分选量和分选水平不断提高。虽然煤目前是以最小的尺寸减小来清洁的，但是细颗粒处理、回收和尾矿处置是主要问题。此外，并不总是有足够的水资源。例如，中国三分之二的煤炭位于干旱地区。因此，干式分离提供了一种替代方法。在现有的干法选煤方法中，空气重介质流化床已被用于有效地分选50- 6 mm煤。然而，在空气-重介质流化床中分离的固体的过度鼓泡和返混导致进料的6 mm的高的下限尺寸，这影响制备效率。本文在前人对6- 50 mm煤的空气流化重介质分选研究的基础上，介绍了细粒煤干法分级、0 ~ 0.5mm煤的静电分选和0.5 ~ 6 mm煤的磁稳定流化床分选的方法和试验结果。© 2003飞虎队。All rights reserved.
The quantities of coal being separated and the levels of separation required are increasing with the demand of environmental protection. Although coal is currently cleaned with the minimum of size reduction, fine particle processing, recovery, and tailings disposal are major problems. Furthermore, adequate water resources are not always available. For example, two thirds of China’s coal are located in arid areas. Hence, dry separation provides an alternative approach. Of the dry coal separation methods available, air dense-medium fluidized beds have been used to separate 50-6mm coal efficiently. However, excessive bubbling and back mixing of the separated solids in the air-dense media fluidized bed causes the high lower size limit of 6mm for the feed material, this affecting the preparation efficiency. Based on prior study on air-fluidized dense media for 6-50mm coal preparation, this paper presents methods and test results on the fine coal dry classification, static electricity beneficiation of 0-0.5mm coal, and magnetically stabilized fluidized beds for separating 0.5-6mm coal. © 2003 SDU. All rights reserved.
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