COAL CLEANING BY GAS AGGLOMERATION

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The agglomeration of ultrafine-size coal particles in an aqueous suspension by means of microscopic gas bubbles was demonstrated in numerous experiments with a scale model mixing system. Coal samples from both the Pittsburgh No. 8 Seam and the Upper Freeport Seam were used for these experiments. A small amount of i-octane was added to facilitate the process. Microscopic gas bubbles were generated by saturating the water used for suspending coal particles with gas under pressure and then reducing the pressure. Microagglomerates were produced which appeared to consist of gas bubbles encapsulated in coal particles. Since dilute particle suspensions were employed, ... continued below

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SHEN, MEIYU; ABBOTT, ROYCE & WHEELOCK, T.D. September 30, 1998.

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Description

The agglomeration of ultrafine-size coal particles in an aqueous suspension by means of microscopic gas bubbles was demonstrated in numerous experiments with a scale model mixing system. Coal samples from both the Pittsburgh No. 8 Seam and the Upper Freeport Seam were used for these experiments. A small amount of i-octane was added to facilitate the process. Microscopic gas bubbles were generated by saturating the water used for suspending coal particles with gas under pressure and then reducing the pressure. Microagglomerates were produced which appeared to consist of gas bubbles encapsulated in coal particles. Since dilute particle suspensions were employed, it was possible to monitor the progress of agglomeration by observing changes in turbidity. By such means it became apparent that the rate of agglomeration depends on the concentration of microscopic gas bubbles and to a lesser extent on the concentration of i-octane. Similar results were obtained with both Pittsburgh No. 8 coal and Upper Freeport coal.

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  • Other: DE00007478
  • Report No.: DE-FG26-97FT97261--02
  • Grant Number: FG26-97FT97261
  • DOI: 10.2172/7478 | External Link
  • Office of Scientific & Technical Information Report Number: 7478
  • Archival Resource Key: ark:/67531/metadc703468

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  • September 30, 1998

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • Dec. 2, 2016, 10:06 p.m.

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SHEN, MEIYU; ABBOTT, ROYCE & WHEELOCK, T.D. COAL CLEANING BY GAS AGGLOMERATION, report, September 30, 1998; Morgantown, West Virginia. (digital.library.unt.edu/ark:/67531/metadc703468/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.