Preparation method of cement grinding aid

Abstract

The invention relates to the field of cement production, in particular to a method for preparing a cement grinding aid; (1) raw material preparation: weigh the raw materials according to the parts by mass: 10-15 parts of propylene glycol, 3-5 parts of unsaturated polyester resin, 6-12 parts of sodium thiosulfate, 2-8 parts of calcium formate, 0.6-0.8 parts of Tween-80, 6-12 parts of alkyl polyglycosides, 10-30 parts of maleic anhydride, 2-6 parts of nano silicon dioxide , 2.4-5.6 parts of sodium hexametaphosphate, 2-6 parts of allyl polyoxyethylene ether, 1.8-4.8 parts of water-retaining cellulose; (2) preparation of modified triethanolamine; (3) preparation of grinding aid: step Take 5-25 parts of modified triethanolamine prepared in (2) and add it to the stirrer, then add the raw materials except calcium formate and sodium thiosulfate, mix and stir evenly, carry out a polymerization reaction at 75°C for 5h, add calcium formate, sulfur Substitute sodium sulfate, after stirring evenly, drying to obtain the grinding aid; the method of the invention is simple and the production cost is low; the prepared cement grinding aid has the advantages of good water retention, and can improve the specific surface area and appearance of cement.

Description

technical field [0001] The invention relates to the field of cement production, in particular to a preparation method of a cement grinding aid. Background technique [0002] Cement grinding aid is a chemical additive that improves the grinding effect and performance of cement. It can significantly increase the output of cement table, the strength of cement of all ages, and improve its fluidity. Cement grinding aids can greatly reduce the phenomenon of electrostatic adsorption and ball formation during the grinding process, and can reduce the tendency of re-agglomeration of ultrafine particles formed during the grinding process. Cement grinding aids can also significantly improve the fluidity of cement, improve the grinding effect of the mill and the powder selection efficiency of the powder separator, thereby reducing the energy consumption of grinding. Cement produced with grinding aids has a lower tendency to compact and agglomerate, which facilitates cement handling and ...

AI Technical Summary

Problems solved by technology

Even if the same product from different manufacturers is applied to different manufacturers, there are cases where the effect is quite different

Existing products cannot give full play to the product’s effect of improving the adhesion of grinding materials, and fail to combine various effective grinding aid ingredients together to achieve the best grinding effect. At the same time, chlorine or alkali in existing grinding aids will Hazardous to cement or concrete

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