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Methods for producing alumina from clay—an evaluation

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Abstract

This paper summarizes and compares Bureau of Mines cost estimates for seven selected processes to produce metallurgical-grade alumina from clay. Processes discussed include acid-leaching, alum intermediate, and alkaline-sinter techniques. The effects of varying the principal operating-cost components—clay, reagents, electricity, fuel, and labor—are presented. Individual nomographs were prepared that permit easy assessment of several processes deemed most likely to be of commercial interest.

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References

  1. F. A. Peters, P. W. Johnson, and R. C. Kirby: Methods for Producing Alumina From Clay. An Evaluation of the Sulfurous Acid-Caustic Purification Process. BuMines Rept. of Inv. 5997, 21 pp., 1962.

  2. Methods for Producing Alumina From Clay. An Evaluation of Five Hydrochloric Acid Processes. BuMines Rept. of Inv. 6133, 68 pp., 1962.

  3. Methods for Producing Alumina From Clay. An Evaluation of Three Sulfuric Acid Processes. BuMines Rept. of Inv. 6229, 57 pp., 1963.

  4. Methods for Producing Alumina From Clay. An Evaluation of a Potassium Alum Process. BuMines Rept. of Inv. 6290, 27 pp., 1963.

  5. P. W. Johnson, F. A. Peters, and R. C. Kirby: Methods for Producing Alumina From Clay. An Evaluation of a Nitric Acid Process. BuMines Rept. of Inv. 6431, 25 pp., 1964.

  6. F. A. Peters, P. W. Johnson, and R. C. Kirby: Methods for Producing Alumina From Clay. An Evaluation of Two Ammonium Alum Processes. BuMines Rept. of Inv. 6573, 47 pp., 1965.

  7. A Cost Estimate of the Bayer Process for Producing Alumina-BuMines Rept. of Inv. 6730, 23 pp., 1966.

  8. F. A. Peters, P. W. Johnson, J. J. Henn, and R. C. Kirby: Methods for Producing Alumina From Clay. An Evaluation of Lime Soda Sinter Process BuMines Rept. of Inv. 6927, 38 pp., 1966.

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Authors and Affiliations

  1. College Park Metallurgy Research Center, Bureau of Mines U.S. Dept. of the Interior, College Park, Md., USA

    F. A. Peters (Chemical engineer)

  2. Office of the Director of Metallurgy Research, Bureau of Mines, U.S. Dept. of the Interior, Washington. D. C., USA

    R. C. Kirby (Staff metallurgist) & K. B. Higbie (Staff metallurgist)

Authors
  1. F. A. Peters
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  2. R. C. Kirby
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  3. K. B. Higbie
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Peters, F.A., Kirby, R.C. & Higbie, K.B. Methods for producing alumina from clay—an evaluation. JOM 19, 26–34 (1967). https://doi.org/10.1007/BF03378647

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  • DOI: https://doi.org/10.1007/BF03378647

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