Cement grinding aid and preparation method thereof

Abstract

The invention discloses a cement grinding aid for improving grinding efficiency in a cement production process and a preparation method thereof, and relates to the technical field of cement productionand processing. The technical scheme of the invention is: a cement grinding aid is characterized in that the cement grinding aid comprises the following raw materials (by weight): 25-47 parts of eggshell powder and 2.5-5 parts of water; wherein the eggshell powder is a undersize of a 0.85 mm sieve after grinding of the discarded eggshell. Compared with the prior art, the invention has the following outstanding substantive features and significant progress: the cement grinding aid is green and environmentally-friendly, is prepared by using eggshell powder as the main raw material, can replaceexisting cement grinding aids, and can remarkably improved the technical performance index of the cement for upgrading.

Description

technical field

[0001] The invention relates to the technical field of cement production and processing, in particular to a cement grinding aid for improving grinding efficiency in the cement production process and a preparation method thereof. Background technique

[0002] During the grinding process of cement, more and more unsaturated valence bonds and structural units with positive and negative charges will be formed on the surface of the micro-particles, making the particles in a metastable high-energy state. The surface energy of the particles also increases rapidly, and the groups of micro-particles form agglomerates that are difficult to disperse again under the relatively large mutual gravitational force, and the re-agglomeration of particles increases the difficulty of ultra-fine grinding. After the grinding aid is added, under the condition of maintaining the original quality standard, the output of the cement mill can be increased by 10%-30%, and the electricity ...