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Coal Briquettes from Coal Washings

机译：煤炭洗选煤成型煤

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In working to find an economical way to make wet coal fines (silt) into a marketable briquette product, several mixes utilizing different binders were worked with. Our studies show that the sodium chloride binder worked the best. The briquettes were strong and economical to produce. Briquettes made with other binders are much more expensive because of high binder cost and also the need to cure the briquettes in an oven after processing. These briquettes, in our study, did not require curing, and the per ton cost for binder was less than $0.20. More information on sodium chloride binder can be found in the L. Robert Kimball and Associates, Department of Energy ET 14303, Briquetting of Fine Coal Using a Sodium Chloride Binder, Final Report, October, 1981. Many positive things were observed during the test burn at Maryland Correctional Institute. These observations are mentioned in that section of the report. We believe a size briquette midway between the two test sizes would be better, and that stocking the product outdoors would produce less chemical runoff and less deterioration of the size and Btu content. We also feel there would be less wear and tear on the burning and handling systems. A larger scale test would be most beneficial and should last at least 24 hours. In conclusion, we feel a marketable briquette can be made from silt but before one would make the large investment in equipment, there should be a larger scale test done and a contract in hand for a large portion of the briquettes. (ERA citation 10:019818)

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