Treatment of alkaline bauxite residue

Treatment of alkaline bauxite residue

  • CN 104,780,982 A
  • Filed: 10/21/2013
  • Published: 07/15/2015
  • Est. Priority Date: 11/07/2012
  • Status: Active Application
First Claim
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1. pack processing is containing a method for the Bayer process waste material of the slurry of the aluminium containing bauxite residue and dissolving, said method comprising the steps of:

  • A waste material is supplied to decanting zone and makes the sedimentation from slurry of bauxite residue by (), thus obtain supernatant;

    B () neutralizes this supernatant to obtain containing precipitating in hydrotalcite and slurry with the solution containing magnesium and calcium;

    (c) to make in this and slurry multiviscosisty to prepare clarified effluent and the compacting slurry containing precipitation hydrotalcite;

    Compacting slurry stream is recycled in the supernatant being fed to neutralization procedure (b) and/or is directly recycled to neutralization procedure (b);

    AndD () disposes clarified effluent and compacting slurry respectively.

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