Bauxite washing for the removal of clay

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• 作者：Ishaq Ahmad (1)
  Ernst-Ulrich Hartge (2)
  Joachim Werther (2)
  Reiner Wischnewski (3)
  
• 关键词：beneficiation ; bauxite ; washing ; clay ; Bayer process
• 刊名：International Journal of Minerals, Metallurgy, and Materials
• 出版年：2014
• 出版时间：November 2014
• 年：2014
• 卷：21
• 期：11
• 页码：1045-1051
• 全文大小：958 KB
• 参考文献：1. J. Harder, Course of expansion, / AT Miner. Process. Engl. Ed., 2010, No. 5, p. 44.
  2. K.K. Chatterjee, / Uses of Metals and Metallic Minerals, New Age International Pvt. Ltd. Publishers, New Delhi, 2007, p. 25.
  3. G. B谩rdossy and G.J.J. Aleva, / Lateritic Bauxites. Developments in Economic Geology, Vol. 27, Elsevier Science, Amsterdam, 1990.
  4. P. Smith, The processing of high silica bauxites: review of existing and potential processes, / Hydrometallurgy, 98(2009), No. 1鈥?, p. 162. CrossRef
  5. F. Mendes, F. Feitosa, D. Sugden, H. Delboni, and O. da Silva A, Design, simulation and operation of the Miltonia beneficiation circuit, [in] / Proceedings of the 8 / th International Alumina Quality Workshop, 2008, p. 365.
  6. P.G. Bhukte, S.P. Puttewar, and R.S. Mishra, Beneficiation of low grade bauxite/laterite: a comparative study, [in] / Proceedings of International Seminar on Mineral Processing Technology ( / MPT 2007), Mumbai, 2007, p. 176.
  7. S. Buntenbach, Bauxite beneficiation, / Aufbereit. Tech., 48(2007), No. 3, p. 4.
  8. S. Buntenbach, F. Donhauser, G. Basu, and S. Chatterjee, Mineral processing technology in the bauxite and alumina industry, [in] / Proceedings of International Seminar on Mineral Processing Technology ( / MPT 2007), Mumbai, 2007, p. 100.
  9. P. Grotjohann and H. M眉ller, Innovative and resource-preserving washing processes for primary and secondary raw materials, [in] / XXV International Minerals Processing Congress ( / IMPC), Brisbane, 2010, p. 3441.
  10. S.G. Ozkan, Effects of simultaneous ultrasonic treatment on flotation of hard coal slimes, / Fuel, 93(2012), p. 576. CrossRef
  11. S.G. Ozkan and H.Z. Kuyumcu, Investigation of mechanism of ultrasound on coal flotation, / Int. J. Miner. Process., 81(2006), No. 3, p. 201. CrossRef
  12. S. Na, Y. Park, A. Hwang, J. Ha, Y. Kim, and J. Khim, Effect of ultrasound on surfactant-aided soil washing, / Jpn. J. Appl. Phys., 46(2007), p. 4775. CrossRef
  13. D. Feng, L. Lorenzen, C. Aldrich, and P.W. Mare, / Ex situ diesel contaminated soil washing with mechanical methods, / Miner. Eng., 14(2001), No. 9, p. 1093. CrossRef
  
• 作者单位：Ishaq Ahmad (1)
  Ernst-Ulrich Hartge (2)
  Joachim Werther (2)
  Reiner Wischnewski (3)
  
  1. Department of Mining Engineering, University of Engineering and Technology, Peshawar, 25120, Pakistan
  2. Institute of Solids Process Engineering and Particle Technology, Hamburg University of Technology (TUHH), Denickestrasse 15, 21073, Hamburg, Germany
  3. Norsk Hydro Aluminum ASA, Sk酶yen, Oslo, Norway
  
• ISSN：1869-103X

文摘

Clay impurities associated with bauxite negatively affect the Bayer process for alumina production. These impurities should be removed as far as possible by a beneficiation technique before the ore is used as feed for the Bayer process. In this current investigation, bauxite washing was conducted in the laboratory. Bauxite washing is a physical process that causes the disintegration and deagglomeration of the clay matrix, and bauxite is liberated from the clay (mainly rich in silica). Subsequently, separation occurs with the assistance of wet screening at a predetermined cut size. Three techniques were investigated in the laboratory: drum washing, water-jet washing, and ultrasonic washing. Various operating parameters were investigated for drum washing and water-jet washing, including materials retention time, drum rotation speed, solid concentration, water-jet spray duration, pressure, and height. We concluded that the retention time of bauxite inside the drum at a solid concentration of 55wt% and a drum rotation speed of 31 r/min is the dominant parameter for the removal of clay from the bauxite surface.