High-strength casting gypsum powder

Abstract

The invention relates to the technical field of gypsum, and discloses high-strength casting gypsum powder. The high-strength casting gypsum powder comprises, by weight, 20-30 parts of raw gypsum powder, 25-34 parts of beta-type semi-hydrated gypsum powder, 8-13 parts of white carbon black, 18-28 parts of high-aluminum powder, 0.3-0.8 part of calcium carbonate powder, 0.2-0.6 part of calcium sulfate powder, 0.01-0.1 part of retarders, 0.2-0.7 part of milk-white glue, 0.5-1.3 parts of sodium carbonate, 1.3-2.4 parts of water glass, 0.2-0.4 part of defoaming agents and 0.1-0.6 part of inorganic fibers. Preferably, the high-strength casting gypsum powder comprises, by weight, 10-18 parts of raw gypsum powder, 21-31 parts of beta-type semi-hydrated gypsum powder, 7-15 parts of white carbon black, 16-25 parts of high-aluminum powder, 0.2-0.7 part of calcium carbonate powder and 0.1-0.5 part of calcium sulfate powder. The high-strength casting gypsum powder has the advantages that technologies for the high-strength casting gypsum powder are simple, crystals can be stably, completely and thoroughly converted, and the stability and the high quality of product indexes further can be guaranteed; safe discharge can be carried out after processing is completed, accordingly, environments can be protected, energy can be saved, the high-strength casting gypsum powder is environmentally friendly and effectively conforms to technological standards, slurry is stable and is long in storage time, and prepared finished product powder is stable.

Description

technical field [0001] The invention relates to the technical field of gypsum, in particular to a high-strength casting gypsum powder. Background technique [0002] Gypsum is a monoclinic mineral, which is a hydrate whose main chemical composition is calcium sulfate. Gypsum is a widely used industrial material and building material, which can be used in cement retarder, gypsum building products, model making, medical food additives, Sulfuric acid production, paper filler and paint filler, etc., the microporous structure and heating dehydration of gypsum and its products make it have excellent sound insulation, heat insulation and fireproof performance. [0003] Most of the raw materials used in the gypsum grinding process currently used are massive, and the dehydration of dihydrate gypsum is very incomplete, and some dihydrate gypsum exists, which has an extremely adverse effect on the quality of hemihydrate gypsum. It is the gypsum material after crystallization. The slurr...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a high-strength casting gypsum powder, which has the advantages of simpler process and better processing effect, and solves the problem of unsatisfactory processing quality