LOW TEMPERATURE ASHING: A METHOD TO ASSESS THE EFFECT OF ADDITIVES ON GRINDING AND FLOTATION OF COAL
作者:
L. Besra,
R.Bhima Rao,
期刊:
Fuel Science and Technology International
(Taylor Available online 1996)
卷期:
Volume 14,
issue 10
页码: 1405-1413
ISSN:0884-3759
年代: 1996
DOI:10.1080/08843759608947646
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
In this paper an attempt has been made to study the effect of using chemical additives on grinding and flotation of thermal coal containing 40% ash. The mill products are analysed by the new technique of low temperature ashing (LT Ash). The LT ash characterisation are in excellent agreement with the results of sink float and flotation studies. Triethanolamine and Polyethylene glycol have shown many fold enhancement in fine grinding. However, Triethanol amine selectively grinds gangue in comparison to coal, while Polyethylene glycol enhances selective grinding of coat in comparison to gangue. This is supplemented by the results of flotation. There is an increase in recovery of combustibles from 39% in absence of additive, to 83% in Polyethylene glycol grinding. The flotation product contained ash between 22-25%.
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