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AssigneeProcess Research Ortech, Inc.
InventorsVaikuntam Iyer Lakshmanan, Ramamritham Sridhar, Noel Paul Mailvaganam, V. Mohan Malhotra
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A finely ground powder comprising a mixture of fly ash and a compound selected from the group consisting of alkali and alkaline earth metal salts, alkali and alkaline earth metal oxides, and metakaolinite. Preferably, the amount of said compound is 0.4 to 1% by weight of the powder. A composition comprising Portland cement and finely ground powder, said finely ground powder being a mixture of fly ash and a compound selected from the group consisting of alkali and alkaline earth metal salts, alkali and alkaline earth metal oxides, and metakaolinite. A method for the treatment of fly ash comprising the step of subjecting a mixture of fly ash and a compound selected from the group consisting of alkali and alkaline earth metal salts, alkali and alkaline earth metal oxides, and metakaolinite, preferably in which the fly ash has been treated for removal of carbon and in particular to increase the amount of crystalline phase.
A finely ground powder comprising a mixture of fly ash and at least one compound selected from the group consisting of alkali and alkaline earth metal oxides, and metakaolinite, in which the powder has been treated for removal of magnetic particles.
A method for the preparation of a composition comprising the steps of (a) admixing fly ash and at least one compound selected from the group consisting of alkali and alkaline earth metal salts, alkali and alkaline earth metal oxides, and metakaolinite, and (b) subjecting the mixture of fly ash and at least one compound to a fine grinding procedure, in which the admixture of fly ash and at least one compound has been subjected to treatment in a gas/solid reactor.
A method for the preparation of a composition comprising the steps of (a) admixing fly ash and at least one compound selected from the group consisting of alkali and alkaline earth metal salts, alkali and alkaline earth metal oxides, and metakaolinite, and (b) subjecting the mixture of fly ash and at least one compound to a fine grinding procedure, in which, prior to step (b), the admixture of fly ash and at least one compound has been subjected to treatment in a gas/solid reactor.
A method for the preparation of a composition comprising the steps of (a) admixing fly ash and at least one compound selected from the group consisting of alkali and alkaline earth metal salts, alkali or alkaline earth metal oxides, and metakaolinite, and (b) subjecting the mixture of fly ash and at least one compound to a fine grinding procedure in which, prior to step (a), the fly ash is subjected to a step of heating in a gas/solid reactor to effect decarbonization of the fly ash.
A method for the preparation of a composition comprising the steps of (a) ad mixing fly ash and at least one compound selected from the group consisting of alkali and alkaline earth metal salts, alkali and alkaline earth metal oxides, and metakaolinite, (b) subjecting the mixture of fly ash and at least one compound to a fine grinding procedure, and (c) subjecting the ground mixture to air classification to separate fine particles of a selected particle size.
A composition comprising Portland cement and finely ground powder, said finely ground powder being a mixture of fly ash and at least one compound selected from the group consisting of alkali and alkaline earth metal salts, alkali and alkaline earth metal oxides, and metakaolinite, in which the powder has been obtained by the method comprising the steps of (a) admixing fly ash and at least one compound selected from the group consisting of alkali and alkaline earth metal salts, alkali and alkaline earth metal oxides, and metakaolinite, and (b) subjecting the mixture of fly ash and at least one compound to a fine grinding procedure, in which the admixture of fly ash and at least one compound has been subjected to heating in a gas/solid reactor.
Dependencies are inferred from the claim text.