Charan, T.Gouri (2016) Liberation Characteristics of Indian Coking Coal Through Washability Investigations. International Research Journal of Earth Sciences , 14 (1). pp. 7-12. ISSN 2321-2527

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Abstract

Coking coal is one of the important raw material for iron and steel industry. The study on available indigenous coal has reduced the dependency on imported coal for these industries. Coal may be crushed to optimum top sizes as required by the industry. The top size of coal is washed during beneficiation process. The combustible materials have been separated through simple gravity separation method after the optimum crushing of coal. An attempt has been made through washability study to investigate the impact of comminution on liberation properties of Indian coking coals. The primary objective is to define the Yield- Ash relation of the Indian coking coal by the use of Mayer's washability curves. The coal obtained from run off mines is crushed to two different top sizes i.e. 50 mm and 6 mm. These top sizes coal have been treated with zinc chloride, bromoform and benzene solutions in sink-float test at different specific gravity. The ash yield relationship for both the size fractions reveals that the liberation characteristics of particles of 6mm size are very high as compared with 50mm size of coal. It has been observed that the washability investigations on 50 mm and 6 mm coal fraction reveals that the theoretical yield of clean coal at 10% ash level is around 24.5% and 44.5% respectively on whole coal basis. The washability investigation study shows that the 6 mm size fraction is giving better liberation than 50 mm size fractions.

Item Type:	Article
Uncontrolled Keywords:	Liberation, Washability curve, Yield-ash relation, Mayer's curve.
Subjects:	Coal Preparation
Divisions:	UNSPECIFIED
Depositing User:	Mr. B. R. Panduranga
Date Deposited:	19 Aug 2017 06:00
Last Modified:	19 Aug 2017 06:00
URI:	http://cimfr.csircentral.net/id/eprint/1811

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