Composite grinding aid, production method and uses thereof

Abstract

The invention relates to a composite grinding aid for cement production and a preparation method and application thereof. The grinding aid contains 1 to 10 percent weight of organic aid and 90 to 99 percent weight of inorganic matrix material. The organic aid comprises at least one of polycarboxylic acid and lignosulphonate, C2-C5 polyfatty alcohols, C2-C5 polyfatty alcohol amines and gluconate, and the inorganic matrix material comprises at least one of sodium silicate and sodium carbonate, sulfate, calcined gypsum and calcium oxide. The invention also discloses the preparation method and the application for the composite grinding aid. The product can remarkably improve early and later strengths of cement, reduce the electric consumption of the grinding, and reduce the using amount of clinker. The compressive strength of the cement is obviously improved, the grinding efficiency is improved by between 10 and 20 percent, and the water consumption of the standard consistency of the cement is kept unchanged basically when 10 to 15 percent of the using amount of the clinker is reduced. The composite grinding aid is particularly suitable for a cement production technology which uses pulverized fuel ash and furnace bottom slag of coal-fired power plants as a composite material.

Description

technical field [0001] The present invention relates to a compound grinding aid used in the production of cementitious materials, its preparation method and its application, in particular, the present invention relates to a method that can reduce the power consumption of cement grinding and improve the early and late strength of cement in cement production. A solid compound reinforced grinding aid. Background technique [0002] Energy saving, emission reduction, and consumption reduction are major issues in cement production at present. There are currently two approaches. One is to try to reduce the power consumption of cement grinding, and the other is to replace part of the cement clinker with industrial solid waste to reduce cement production costs. , also reduces greenhouse gas emissions. [0003] The power consumption of cement grinding operation accounts for 70% of the power consumption of cement production, and the energy utilization rate of the ball mill used for gr...

AI Technical Summary

Problems solved by technology

Pozzolanic materials include slag, fly ash, slag, natural volcanic ash, etc. Most of the traditional grinding aids and reinforcing agents are suitable for the cement process mainly mixed with slag. At present, slag has become a scarce material in most areas, and the price It is expensive, but if fly ash and slag are used as the main additives instead of cement clinker, although the cost can be reduced, but with the increase of fly ash and slag, the early strength and later strength of cement will decrease, and the cement’s The water consumption of standard consistency has increased significantly, therefore, the market needs a new cement grinding aid for improving the early and late strength of cement mixed with fly ash while reducing water consumption

[0005] At present, there is no cement grinding aid on the market that can simultaneously reduce energy consumption, improve early and late strength, and do not increase the water consumption of cement at the same time.

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