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Effect of clays on the settling behavior of coal and pyrite

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Abstract

Preliminary experiments have revealed that the addition of bentonite to a coal-pyrite slurry in water of controlled pH (usually equal to the PZC of coal) selectively accelerates the sedimentation rate of pyrite. Electrokinetic flocculation between the positively charged pyrite particles and the negatively charged bentonite particles appears to be the dominant mechanism for this phenomenon. Although all coals possess varying surface chemistry effects, the process appears to hold potential for the economical removal of pyritic sulfur from a variety of coals. ■

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References

  • Khoury, D.L., 1981, Coal Cleaning Technology, Noyes Data Corp., New Jersey.

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  • Menon, V.B., and Wasan, D.T., 1986, “Particle-Fluid Interactions with Application to Solids-Stabilized Emulsions.” Colloids Surfaces, Vol. 19, pp. 89–107.

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Authors and Affiliations

  1. research engineers with Research Triangle Institute, Research Triangle Park, NC, Colombia

    V. B. Menon, M. C. Woods, M. E. Mullins & L. D. Michaels

Authors
  1. V. B. Menon
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  2. M. C. Woods
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  3. M. E. Mullins
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  4. L. D. Michaels
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Additional information

SME-MMP nonmeeting paper 87–625.

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Menon, V.B., Woods, M.C., Mullins, M.E. et al. Effect of clays on the settling behavior of coal and pyrite. Mining, Metallurgy & Exploration 4, 193–195 (1987). https://doi.org/10.1007/BF03402691

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  • DOI: https://doi.org/10.1007/BF03402691

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