POC-scale testing of an advanced fine coal dewatering equipment/technique: Quarterly technical progress report,January--March 1997

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Laboratory centrifugal dewatering tests were conducted to study the effects of anionic and cationic flocculants on filtration of PMCC compliance (low sulfur) and non-compliance (high sulfur) ultrafine coal slurry. The results obtained with compliance coal indicated that use of 30 g/t anionic flocculant reduced filter cake moisture from 32. 3 to 29.0 percent and increased solids recovery by two absolute percentage points. Use of cationic flocculant had no effects on solids recovery but lowered cake moisture to 27 percent at a dosage of 15 g/t. With the non-compliance coal slurry addition of 15 g/t anionic flocculant lowered cake moisture from ... continued below

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Medium: P; Size: 43 p.

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Tao, D.; Grappo, J.G. & Parekh, B.K. May 7, 1997.

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Description

Laboratory centrifugal dewatering tests were conducted to study the effects of anionic and cationic flocculants on filtration of PMCC compliance (low sulfur) and non-compliance (high sulfur) ultrafine coal slurry. The results obtained with compliance coal indicated that use of 30 g/t anionic flocculant reduced filter cake moisture from 32. 3 to 29.0 percent and increased solids recovery by two absolute percentage points. Use of cationic flocculant had no effects on solids recovery but lowered cake moisture to 27 percent at a dosage of 15 g/t. With the non-compliance coal slurry addition of 15 g/t anionic flocculant lowered cake moisture from 30 to 28.5 percent with marginal effects on solids recovery; addition of cationic flocculant reduced cake moisture by one absolute percentage point. Both flocculants showed marginal effects on solids recovery. Laboratory vacuum filter leaf filtration studies showed that use of flocculants considerably increased filtration kinetics. For example, addition of 15 g/t anionic flocculant to the compliance coal slurry increased filtration kinetics by 10 times and addition of 15 g/t.

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Medium: P; Size: 43 p.

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OSTI as DE97054287

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  • Other Information: PBD: 7 May 1997

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  • Other: DE97054287
  • Report No.: DOE/PC/94155--T10
  • Grant Number: AC22-94PC94155
  • DOI: 10.2172/643556 | External Link
  • Office of Scientific & Technical Information Report Number: 643556
  • Archival Resource Key: ark:/67531/metadc690876

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  • May 7, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Nov. 10, 2015, 9:17 p.m.

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Tao, D.; Grappo, J.G. & Parekh, B.K. POC-scale testing of an advanced fine coal dewatering equipment/technique: Quarterly technical progress report,January--March 1997, report, May 7, 1997; United States. (digital.library.unt.edu/ark:/67531/metadc690876/: accessed September 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.