Pilot scale single stage fine coal dewatering and briquetting process. Technical report, September 1--November 30, 1995

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The primary goal of the current coal preparation research is to reduce the ash and sulfur content from coal, using fine grinding and various coal cleaning processes to separate finely disseminated mineral matter and pyrite from coal. Small coal particles are produced by the grinding operation, thus the ultrafine coal becomes very difficult to dewater. In addition, the ultrafine coal also creates problems during its transportation, storage and handling at utility plants. The current research is seeking to combine ultrafine coal dewatering and briquetting processes into a single stage operation, using hydrophobic binders as coal dewatering and binding reagents with ... continued below

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19 p.

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Wilson, J.W.; Ding, Y. & Honaker, R.Q. December 31, 1995.

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  • Wilson, J.W.
  • Ding, Y. Univ. of Missouri, Rolla, MO (United States). Dept. of Mining Engineering
  • Honaker, R.Q. Southern Illinois Univ., Carbondale, IL (United States). Dept. of Mining Engineering

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Description

The primary goal of the current coal preparation research is to reduce the ash and sulfur content from coal, using fine grinding and various coal cleaning processes to separate finely disseminated mineral matter and pyrite from coal. Small coal particles are produced by the grinding operation, thus the ultrafine coal becomes very difficult to dewater. In addition, the ultrafine coal also creates problems during its transportation, storage and handling at utility plants. The current research is seeking to combine ultrafine coal dewatering and briquetting processes into a single stage operation, using hydrophobic binders as coal dewatering and binding reagents with the help of a compaction device. From previous tests, it has been found that coal pellets with a moisture content of less than 15% and good wear and water resistance can be successfully fabricated at pressures of less than 6,000 psi using a lab scale ram extruder. The primary objective of the research described in this quarter has been to extend the lab scale ultrafine coal dewatering and briquetting process into a pilot scale operation, based on the test data obtained from earlier research. A standard roller briquetting machine was used to dewater fine coal-binder mixtures during the briquetting process. The operating parameters, including moisture content of feed, feed rate, and roller speed, were evaluated on the basis of the performance of the briquettes. Briquettes fabricated at rates of up to 108 pellets per minute exhibited satisfactory water and wear resistance, i.e., less than 7.5% cured moisture and less than 8.3% weight loss after 6 min. of tumbling. Also, coal-binder samples with moisture contents of 40 percent have been successfully dewatered and briquetted. Briquetting of fine coal was possible under current feeding conditions, however, a better feeding system must be designed to further improve the quality of dewatered coal briquettes.

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19 p.

Notes

OSTI as DE96012305

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  • Other Information: PBD: [1995]

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  • Other: DE96012305
  • Report No.: DOE/PC/92521--T276
  • Grant Number: FC22-92PC92521
  • DOI: 10.2172/257329 | External Link
  • Office of Scientific & Technical Information Report Number: 257329
  • Archival Resource Key: ark:/67531/metadc669955

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Office of Scientific & Technical Information Technical Reports

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  • December 31, 1995

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Dec. 3, 2015, 5:58 p.m.

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Wilson, J.W.; Ding, Y. & Honaker, R.Q. Pilot scale single stage fine coal dewatering and briquetting process. Technical report, September 1--November 30, 1995, report, December 31, 1995; United States. (digital.library.unt.edu/ark:/67531/metadc669955/: accessed November 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.