Process for making cements with silicon containing grinding aids
AssigneeDow Corning Corporation
InventorsJonathan David Wineland, Sebastiao Walter Lopes da Cunha, Jr.
Life of this patent
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Abstract
Hydraulic cement is made by a process in which (i) raw materials are crushed and ground, (ii) the crushed and ground raw materials and other components are burned and calcined to prepare a cement clinker, and (iii) the cement clinker is ground to a fine powder. A grinding aid is added to the cement clinker before it is ground in (iii). The grinding aid is an uncalcined direct process residue gel, which is an hydrolysis product of alkylhalodisilanes produced as by-products in the manufacture of alkylhalosilanes.
Claims10
A process for manufacturing hydraulic cement in which (i) raw materials are crushed and ground, (ii) the crushed and ground raw materials and other components are burned and calcined to prepare a cement clinker, and (iii) the cement clinker is ground to a fine powder;
- the improvement comprising adding to the cement clinker before it is ground in step (iii), a grinding aid comprising an uncalcined direct process residue gel which comprises an hydrolysis product of mixed alkylchlorosilanes and alkylhalodisilanes produced as by-products in the manufacture of alkylhalosilanes.
A process for grinding minerals, ores, or fuels, in which the minerals, ores, or fuels are crushed and ground with a grinding aid, the improvement comprising adding to the minerals, ores, or fuels as grinding aid, an uncalcined direct process residue gel which comprises an hydrolysis product of mixed alkylchlorosilanes and alkylhalodisilanes produced as by-products in the manufacture of alkylhalosilanes.
Dependencies are inferred from the claim text.