Continuous pilot scale testing of column flotation for recovery of fine coal

J. G. Groppo, B. K. Parekh

Research output: Contribution to conferencePaperpeer-review

1 Scopus citations


A series of performance studies has been conducted using countercurrent column flotation to recover a marketable clean coal product from existing preparation plant fine waste streams. The test work was conducted at several preparation plant sites in Kentucky and Virginia and utilized a 0.15m (6 in.) I.D. column that was 5.79m (19 ft.) high. The refuse streams tested included both thickener feed and classifying cyclone overflow with a typical size distribution of 100 mesh X 0. The percent solids of the column flotation feed varied from 1.5 to 15%, while the ash content ranged from 30-60%. The concentrates produced contained 2-10% ash with BTU recoveries of nearly 90% using 0.12-1.25 kg/ton (0.25-2.5 lbs/ton) fuel oil and 0.12 kg/ton (0.25 lb/ton) MIBC. These results were consistent with or better than results obtained in preliminary laboratory-scale column flotation evaluation. Test results from 7 different seams are discussed as well as scale-up relationships utilized to design a full-scale installation presently in operation.

Original languageEnglish
Pages5p 153
StatePublished - 1990
EventSME Annual Meeting - Salt Lake City, UT, USA
Duration: Feb 26 1990Mar 1 1990


ConferenceSME Annual Meeting
CitySalt Lake City, UT, USA

ASJC Scopus subject areas

  • General Engineering


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