Method for producing a pozzolanic or latent-hydraulic cement clinker substitute
AssigneeThyssenkrupp Industrial Solutions AG
InventorsKathrin Rohloff, Michael Enders
Life of this patent
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Abstract
Methods for producing pozzolanic or latent hydraulic cement clinker substitutes may involve calcining clay with a fuel comprising a mineral substance at temperatures in the range from 500 to 1250° C., preferably from 550 to 1150° C., most preferably from 700 to 900° C. A resulting mixture of mineral substance from the fuel and the calcined clay forms a pozzolanic or latent hydraulic cement clinker substitute, in which a fraction of the mineral substance incorporated into the pozzolanic or latent hydraulic cement clinker substitute by the fuel is 1-60% by weight.
Claims20
A method for producing a pozzolanic or latent-hydraulic cement clinker substitute, the method comprising calcining clay at temperatures of between 500 to 1250 degrees Celsius with a fuel comprising a mineral substance, wherein a resulting mixture of the mineral substance from the fuel and the calcined clay forms the pozzolanic or latent-hydraulic cement clinker substitute that includes 1-60% by weight of the mineral substance, wherein the fuel comprising the mineral substance has a ratio of Al2O3 to SiO2 of 0.13-1.4% by weight and a CaO content of less than 80% by weight.
A method for producing a pozzolanic or latent-hydraulic cement clinker substitute, the method comprising:
- calcining clay at temperatures of between 500 to 1250 degrees Celsius with a fuel comprising a mineral substance, wherein a resulting mixture of the mineral substance from the fuel and the calcined clay forms the pozzolanic or latent-hydraulic cement clinker substitute that includes 1-60% by weight of the mineral substance;
- and
- supplying a flyash to the calcining of the clay and the fuel with the mineral substance.
A method for producing a pozzolanic or latent-hydraulic cement clinker substitute, the method comprising calcining clay at temperatures of between 500 to 1250 degrees Celsius with a fuel comprising a mineral substance, wherein a resulting mixture of the mineral substance from the fuel and the calcined clay forms the pozzolanic or latent-hydraulic cement clinker substitute that includes 1-60% by weight of the mineral substance, wherein the fuel used in the calcining is supplemented with a fuel with a flyash having a carbon fraction of at least 0.5% by weight.
Dependencies are inferred from the claim text.