SIMULTANEOUS DRYING AND COMMINUTION OF COAL IN A SPOUTED BED |
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Authors: | G.K Khoe S.L. Sun C.J Lim N Epstein |
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Affiliation: | Department of Chemical Engineering , The University of British Columbia Vancouver , Canada , V6T 1W5, B.C |
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Abstract: | Coal was dried and simultaneously reduced in size in a spouted bed using air at different temperatures as the spouting fluid and either glass beads as a dynamic grinding aid or a specially designed metal insert as a static grinding aid. Both semi-batch and continuous operations were carried out, the balanced feed and product-discharge rates in the latter being pre-determined from the results in the former. The rates of both drying and comminution were synergistically increased with increases in inlet air temperature. The static insert was shown to be a more effective comminution device than the glass beads. |
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Keywords: | coal drying grinding aids spouting static insert synergy |
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