Method for preparing active calcium carbonate by taking gypsum as raw material

Method for preparing active calcium carbonate by taking gypsum as raw material

  • CN 101,830,494 A
  • Filed: 05/11/2010
  • Published: 09/15/2010
  • Est. Priority Date: 05/11/2010
  • Status: Active Application
First Claim
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1. one kind is the method for feedstock production treated carbonates with the gypsum, it is characterized in that carrying out as follows:

  • be raw material with the gypsum, to regulate the mass ratio of calcium sulphate dihydrate solid and liquid water be 100 by adding water or transpiring moisture;

    0.3-40, adding lime carbonate activator to the mass ratio of calcium sulphate dihydrate solid and lime carbonate activator is 100;

    1.0-2.5, adding bicarbonate of ammonia to the mass ratio of calcium sulphate dihydrate solid and bicarbonate of ammonia is 100;

    92-106, mix, grind 5-12h under the room temperature, adding water stirs, filter, wash throw out to filtrate with water and use BaCl 2The no white precipitate of solution check with drying precipitate, obtains particle diameter 0.2-5 micron active carbonic acid calcium product, obtains ammonium sulfate solids behind the filtrate evaporative crystallization.

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