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Process and a plant for the production of Portland cement clinker

  • US 6,908,507 B2
  • Filed: 04/12/2002
  • Issued: 06/21/2005
  • Est. Priority Date: 04/13/2001
  • Status: Expired due to Fees
First Claim
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1. A process for producing cement clinker, comprising the steps of:

  • a) providing a mixture of ground calcareous materials and ground argillaceous materials;

    b) heating the mixture of step a) to a temperature sufficient to calcine and fuse the ground materials to form the cement clinker, and thereby producing an exhaust gas containing CO2;

    c) catalysing the hydration of at least a portion of the CO2 contained in the exhaust gas and producing a solution containing bicarbonate ions and hydrogen ions; and

    d) adding to the solution obtained in step c) metal ions, and adjusting the pH of the solution to precipitate a carbonate of said metal.

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