A kind of method that aluminium lime-ash prepares aluminum oxide

A kind of method that aluminium lime-ash prepares aluminum oxide

  • CN 106,745,130 A
  • Filed: 01/11/2017
  • Published: 05/31/2017
  • Est. Priority Date: 01/11/2017
  • Status: Active Application
First Claim
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1. a kind of method that aluminium lime-ash prepares aluminum oxide, it is characterised in that:

  • The method is comprised the following steps:

    Aluminium lime-ash successively washing and desalting, drying and screening are obtained into powder;

    Powder is carried out into acidleach treatment, makes the aluminium in powderDissolving, obtains pickle liquor;

    The Fe that hydrogen peroxide and NaOH solution are come in oxidizing acid immersion liquid is separately added into pickle liquor2+With regulation acidThe pH value of immersion liquid, obtains being enriched with NaAlO2Solution;

    Excessive CO is passed through in the solution2, it is then peeled off the heavy of acquisitionForm sediment;

    Calcining precipitation, obtains aluminum oxide.

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