Coal Beneficiation by Gas Agglomeration

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Description

Coal beneficiation is achieved by suspending coal fines in a colloidal suspension of microscopic gas bubbles in water under atmospheric conditions to form small agglomerates of the fines adhered by the gas bubbles. The agglomerates are separated, recovered and resuspended in water. Thereafter, the pressure on the suspension is increased above atmospheric to deagglomerate, since the gas bubbles are then re-dissolved in the water. During the deagglomeration step, the mineral matter is dispersed, and when the pressure is released, the coal portion of the deagglomerated gas-saturated water mixture reagglomerates, with the small bubbles now coming out of the solution. The ... continued below

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Wheelock, Thomas D. & Shen, Meiyu March 15, 2000.

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Description

Coal beneficiation is achieved by suspending coal fines in a colloidal suspension of microscopic gas bubbles in water under atmospheric conditions to form small agglomerates of the fines adhered by the gas bubbles. The agglomerates are separated, recovered and resuspended in water. Thereafter, the pressure on the suspension is increased above atmospheric to deagglomerate, since the gas bubbles are then re-dissolved in the water. During the deagglomeration step, the mineral matter is dispersed, and when the pressure is released, the coal portion of the deagglomerated gas-saturated water mixture reagglomerates, with the small bubbles now coming out of the solution. The reagglomerate can then be separated to provide purified coal fines without the mineral matter.

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OSTI as DE00808747

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  • Patent File Date: 2000 Mar 15

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  • Report No.: PATENTS-US-A9527451
  • Grant Number: FG26-97FT97261
  • Office of Scientific & Technical Information Report Number: 808747
  • Archival Resource Key: ark:/67531/metadc739215

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • March 15, 2000

Added to The UNT Digital Library

  • Oct. 18, 2015, 6:40 p.m.

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  • March 11, 2016, 4:37 p.m.

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Wheelock, Thomas D. & Shen, Meiyu. Coal Beneficiation by Gas Agglomeration, patent, March 15, 2000; United States. (digital.library.unt.edu/ark:/67531/metadc739215/: accessed August 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.