Biomass derived grinding aids

摘要

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.

主权项

1. 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; anda crude glycerin obtained derived from biofuel production; andwherein 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.