Environmental control technology for coal cleaning wastes

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Chemical and mineralogical examination of coal wastes and their drainages has led us to consider three approaches to solution of the coal waste drainage problem. The first is alteration of the waste to render it non-polluting. Calcining of the waste has been shown to be an effective way of accomplishing this, but the cost of this technique is too high for it to be of any use. The second approach is codisposal of the coal waste with neutralizing and/or absorbing agents. The best way to implementing this approach is sequential slurry coating of the coal waste with lime and limestone, ... continued below

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Pages: 20

Creation Information

Wagner, P.; Heaton, R.C.; Wangen, L.E.; Nyitray, A.M. & Jones, M.M. January 1, 1981.

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Description

Chemical and mineralogical examination of coal wastes and their drainages has led us to consider three approaches to solution of the coal waste drainage problem. The first is alteration of the waste to render it non-polluting. Calcining of the waste has been shown to be an effective way of accomplishing this, but the cost of this technique is too high for it to be of any use. The second approach is codisposal of the coal waste with neutralizing and/or absorbing agents. The best way to implementing this approach is sequential slurry coating of the coal waste with lime and limestone, which is both effective and inexpensive. This is probably the best of the one-time treatments which we have evaluated when both effectiveness and cost are considered. Unfortunately this approach suffers from a lack of permanence and must be augmented with some other method of permanent diposal. The third approach to controlling coal waste effluent is to collect and treat the drainages. Perhaps the most effective way of doing this is by alkaline neutralization of the drainages. This is currently the most widely used technique for this purpose, because of its simplicity and availability. We have shown that it is effective provided that the iron is oxidized to the plus three oxidation state, and that the cost of this treatment is low. However, the need for continued treatment into the indefinite future must be considered a severe limitation.

Physical Description

Pages: 20

Notes

NTIS, PC A02/MF A01.

Source

  • Workshop on processing needs and methodology for wastewaters from the conversion of coal, oil shale and biomass to synfuels, Germantown, MD, USA, Jun 1981

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  • Other: DE81025331
  • Report No.: LA-UR-81-1904
  • Report No.: CONF-8106109-1
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 6176958
  • Archival Resource Key: ark:/67531/metadc1105049

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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.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • January 1, 1981

Added to The UNT Digital Library

  • Feb. 22, 2018, 7:45 p.m.

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  • May 22, 2018, 2:10 p.m.

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Wagner, P.; Heaton, R.C.; Wangen, L.E.; Nyitray, A.M. & Jones, M.M. Environmental control technology for coal cleaning wastes, article, January 1, 1981; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1105049/: accessed August 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.