Singh, K.M.P. and Charan, T. Gouri (2012) Sedimentation Studies on Effect of Some Industrial Flocculates on Indian Non-coking Coal Fines. CPSI Journal , 4 (10). pp. 6-10.

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Abstract

Washing of Indian non-coking coal is coming up in a big way to meet the Government stipulations. The coal industry is washing about 120 million tonnes of non coking coals and has planned to enhance 250 million ton in five year times. Depending on the washability characteristics and coal washing equipment top size intake, ROM coal is usually crushed to a desired top size. The different process of handling and washing generate fines (below 500 µm) to the tune of around 10 percent of whole coal. In the course of coal washing the fines are discharged along with process water and sent to the thickeners for recovery. This coal fines, associated clay, mineral matter particles depending on the ash percentage either mixed with clean product or sent to the rejects. The processed water as such cannot be used as recirculation water, unless mostly suspended fines are settled down and separated in the thickener. To enhance the settling rate of the suspended colloids, some chemical polymeric flocculants is industrially used. Depending on the flocculent, coal surface properties, associated clay, mineral matter particles settling efficiency varies greatly. Present studies reflect some of the findings on the sedimentation rates of flocculants.

Item Type:	Article
Subjects:	Coal Preparation
Divisions:	UNSPECIFIED
Depositing User:	Dr. Satyendra Kumar Singh
Date Deposited:	19 Dec 2014 05:02
Last Modified:	19 Dec 2014 05:02
URI:	http://cimfr.csircentral.net/id/eprint/1495

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