Mechanochemical treatment of high silica bauxite with lime

Paul Mccormick, T. Picaro, P.A.I. Smith

    Research output: Contribution to journalArticle

    39 Citations (Scopus)

    Abstract

    The mechanochemical processing of bauxite with lime has been investigated. The milling of bauxite and lime mixtures in an attritor mill resulted in the formation of an iron rich hydrogarnet phase in bauxite/lime slurries containing greater than 9% CaO. Up to 90% of the quartz contained in the bauxite was found to have been removed by the hydrogarnet reaction. The hydrogarnet compound was stable during the high temperature alumina extraction step, resulting in a 30% drop in caustic soda consumption. Alumina extraction was not influenced by the mechanochemical processing. (C) 2002 Elsevier Science Ltd. All rights reserved.
    Original languageEnglish
    Pages (from-to)211-214
    JournalMinerals Engineering
    Volume15
    Issue number2002
    DOIs
    Publication statusPublished - 2002

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