A kind of cement grinding aid and preparation method thereof

Abstract

The invention discloses a cement grinding aid. The cement grinding aid is prepared from, by weight, 30-50 parts of glycerol carbonate, 40-60 parts of alkylol amine and 0.5-1.5 parts of a catalyst. The invention further discloses a preparation method of the cement grinding aid. Low-cost monoethanolamine and diethanol amine are fully utilized and react with the glycerol carbonate with activated carbon acid ester groups under the action of the catalyst, and the cement grinding aid having more excellent grinding aid strengthening performances is prepared by combining with a specific process. The preparation method is simple, and the obtained cement grinding aid is low in dosage and uniform in stability, can not only stabilize a material layer and also has a remarkable grinding aid effect. In addition, the strength of cement products is further remarkably improved, electricity is saved, the yield is improved, energy saving and emission reduction in the cement industry are promoted, and the cement grinding aid has wide market prospect.

Description

technical field [0001] The invention relates to the technical field of cement admixtures, in particular to a cement grinding aid and a preparation method thereof. Background technique [0002] Cement is one of the most widely used basic materials at present, and its production and consumption are huge. As a highly polluting and energy-intensive industry, the cement industry has attracted much attention for its energy saving and consumption reduction. Cement production can be briefly summarized as two grindings and one burning, that is, raw material grinding, calcining, and cement grinding. Among them, cement grinding is one of the processes with low energy utilization rate in the cement production process. This is mainly because when the particle size of cement particles is reduced to micro- and nano-scale, the wear resistance and agglomeration tendency are significantly enhanced. With the continuous grinding of cement particles, this trend and effect will become more obvio...

AI Technical Summary

Problems solved by technology

[0003] At present, triethanolamine is one of the main raw materials of cement grinding aids, accounting for about 70% of the total amount of grinding aids. Currently, the commercially available compound cement grinding aids have a large dosage, and the dosage of powders is 0.5-1 %, the dosage of liquid is 0.03-0.1%, and liquid cement grinding aids still have deficiencies such as stratification and settlement, resulting in large fluctuations in product performance, which affects the effective performance of grinding aid enhancement; at the same time, with petroleum and other chemical The price of raw materials is rising, and the price of triethanolamine is constantly rising, which seriously restricts the promotion and application of cement grinding aids

Images