Coal reverse flotation. Part II: Cleaning of a subbituminous coal

被引：20

作者：

Ding, KJ ^{[1
]}

Laskowski, JS ^{[1
]}

机构：

[1] Univ British Columbia, Dept Min Engn, Vancouver, BC V6T 1Z4, Canada

来源：

MINERALS ENGINEERING | 2006年 / 19卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

reverse floatation; coal reverse floatation; subbituminous coal; zero conditioning time; polyacrylamide;

D O I：

10.1016/j.mineng.2005.07.012

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Reverse flotation of a subbituminous coal was investigated and it turned out that a large amount of DTAC was needed in this process. The application of the zero-conditioning time method along with the use of PAM significantly reduced DTAC consumption from over 6 kg/t down to 1.375 kg/t. Dextrin was necessary to improve the selectivity. The addition of a dispersant (tannic acid) improved further the quality of concentrate. The concentrate ash content of 16.7% at 50.4% yield was obtained for the feed ash content of 34.6%. Although this gives only about 64% combustible recovery, since the inherent ash content for this coal was determined to be 10% the room for further improvement is very limited. The best separation was obtained around a natural pH of 7.5-8.4 for this coal. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：79 / 86

页数：8

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