A fine coal circuitry study using column flotation and gravity separation. Technical report, September 1--November 30, 1994

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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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18 p.

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Honaker, R.Q. & Reed, S. December 31, 1994.

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  • Honaker, R.Q. Southern Illinois Univ., Carbondale, IL (United States). Dept. of Mining Engineering
  • 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. The gravity/flotation circuits will be compared based on their optimum separation performance which will consider ash and total sulfur rejection and energy recovery as well as the probable error (E{sub p}) value obtained from washability analyses. During this reporting period, multi-stage treatment using the Falcon concentrator was conducted on a refuse pond ({minus}100 mesh) coal sample and a {minus}28 mesh run-of-mine coal sample. The results suggest that the Falcon concentrator can make an ideal separation for either sample in a single process. Recleaning was found to improve product grade, however, recovery was reduced sharply. In addition, the groups involved with the in-plant testing of the Floatex Hydrosizer met and organized the test plan which will be conducted at Kerr-McGee`s Galatia preparation plant during the next reporting period. Coal samples for the circuitry tests will be collected during, this time period.

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18 p.

Notes

OSTI as DE95008008

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  • Other Information: PBD: [1994]

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  • Other: DE95008008
  • Report No.: DOE/PC/92521--T206
  • Grant Number: FC22-92PC92521
  • DOI: 10.2172/28254 | External Link
  • Office of Scientific & Technical Information Report Number: 28254
  • Archival Resource Key: ark:/67531/metadc667878

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  • December 31, 1994

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • June 27, 2016, 1:27 p.m.

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Honaker, R.Q. & Reed, S. A fine coal circuitry study using column flotation and gravity separation. Technical report, September 1--November 30, 1994, report, December 31, 1994; United States. (digital.library.unt.edu/ark:/67531/metadc667878/: accessed November 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.