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US 9,328,021 B2Granted
Biomass derived grinding aids
AssigneeGCP Applied Technologies Inc.
InventorsLeslie A. Jardine, Charlotte Porteneuve, Gerard Blond
Life of this patent
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Abstract
Compositions and methods for increasing grinding efficiency of cement, cement clinker, raw materials for cement, and other inorganic particles. Use of biomass-derived polyols such as diols, triols, or mixtures thereof, optionally with a conventional grinding aid, cement quality improver, and/or hexavalent chromium reducer, are believed to provide less risk of sludging when compared to glycerides obtained from fossil fuel sources.
Claims12
A method for grinding particles, comprising:
- introducing to cement clinker particles and limestone particles, in a ball mill or roller mill whereby said particles are ground to have finer average particle size, an aqueous additive composition comprising:
- at least one grinding additive selected from the group consisting of triethanolamine, triisopropanolamine, diethanolisopropanolamine, tetrahyroxyethylthylene diamine, an acetic acid or salt thereof, or mixtures thereof;
- and
- a crude glycerin obtained derived from biofuel production;
- and
- wherein the amount of said at least one grinding additive and said crude glycerin derived from biofuel production are in the ratio of 90:10 to 10:90 by weight.
3 more elements
A method for grinding particles, comprising:
- introducing to limestone particles in a ball mill or roller mill whereby said particles are ground to have finer average particle size, an aqueous additive composition comprising:
- at least one grinding additive comprising an acetic acid or salt thereof;
- and
- a crude glycerin obtained derived from biofuel production;
- and
- wherein the amount of said at least one grinding additive and said crude glycerin derived from biofuel production are in the ratio of 90:10 to 10:90 by weight.
3 more elements
A method for grinding particles, comprising:
- introducing to limestone particles in a ball mill or roller mill whereby said particles are ground to have finer average particle size, an aqueous additive composition comprising:
- at least one grinding additive comprising triethanolamine, triisopropanolamine, diethanolisopropanolamine, tetrahyroxyethylthylene diamine, or mixture thereof;
- and
- a crude glycerin obtained derived from biofuel production;
- and
- wherein the amount of said at least one grinding additive and said crude glycerin derived from biofuel production are in the ratio of 90:10 to 10:90 by weight.
3 more elements
Dependencies are inferred from the claim text.