A fine coal circuitry study using column flotation and gravity separation. Quarterly report, 1 December 1994--28 February 1995

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Column flotation provides excellent recovery of ultrafine coal while producing low ash content concentrates. However, column flotation is not efficient for treating fine coal containing significant amounts of mixed-phase particles. Fortunately, enhanced gravity separation has proved to have the ability to treat the mixed-phased particles more effectively. A disadvantage of gravity separation is that ultrafine clay particles are not easily rejected. Thus, a combination of these two technologies may provide a circuit that maximizes both the ash and sulfur rejection that can be achieved by physical coal cleaning while maintaining a high energy recovery. This project is studying the potential ... continued below

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20 p.

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Honaker, R.Q. & Reed, S. December 31, 1995.

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  • Honaker, R.Q. Southern Illinois Univ., Carbondale, IL (United States)
  • Reed, S. Kerr-McGee Coal Corp., Oklahoma City, OK (United States)

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Description

Column flotation provides excellent recovery of ultrafine coal while producing low ash content concentrates. However, column flotation is not efficient for treating fine coal containing significant amounts of mixed-phase particles. Fortunately, enhanced gravity separation has proved to have the ability to treat the mixed-phased particles more effectively. A disadvantage of gravity separation is that ultrafine clay particles are not easily rejected. Thus, a combination of these two technologies may provide a circuit that maximizes both the ash and sulfur rejection that can be achieved by physical coal cleaning while maintaining a high energy recovery. This project is studying the potential of using different combinations of gravity separators, i.e., a Floatex hydrosizer and a Falcon Concentrator, and a proven flotation column, which will be selected based on previous studies by the principle investigator. During this reporting period, an in-plant Box-Behnken test program of the Floatex hydrosizer has been conducted at Kerr-McGee`s Galatia preparation plant. The results have shown that the Floatex hydrosizer can be successfully used to reject most of coarser ({plus}100 mesh) pyrite and mineral matter in the coal stream to the plant. With a single operation, ash rejection of 63% and total sulfur rejection of 43% have been achieved while maintaining a combustible recovery as high as 90.5%. A long term duration test under the optimum operating conditions determined from Box-Behnken test results has also been conducted. The feed samples for the following enhanced gravity - column flotation studies, which will be carried out in the next reporting period, have been collected.

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20 p.

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OSTI as DE96007584

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  • Other Information: PBD: [1995]

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  • Other: DE96007584
  • Report No.: DOE/PC/92521--T256
  • Grant Number: FC22-92PC92521
  • DOI: 10.2172/207072 | External Link
  • Office of Scientific & Technical Information Report Number: 207072
  • Archival Resource Key: ark:/67531/metadc666297

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  • December 31, 1995

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Nov. 30, 2015, 8:43 p.m.

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Honaker, R.Q. & Reed, S. A fine coal circuitry study using column flotation and gravity separation. Quarterly report, 1 December 1994--28 February 1995, report, December 31, 1995; United States. (digital.library.unt.edu/ark:/67531/metadc666297/: accessed November 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.