High efficiency cement composite grinding additive and preparation method thereof

Abstract

The invention discloses a high efficiency cement composite grinding additive, comprising the following raw materials by weight percent: 10-25% of calcined gypsum, 10-30% of calcined aluminite, 20-40% of sodium metasilicate, 2-4% of triethanolamine, 0.5-2% of polyacrylate, 0.5-3% of dispersant and 20-30% of zeolite powder. The preparation method of the high efficiency cement composite grinding additive comprises the following steps: first selecting raw materials, then dripping liquid raw materials-triethanolamine and polyacrylate TH-1100 with a liquid pump in zeolite powder, then preparing reinforced grinding component with a dry powder mixer, finally adding the reinforced grinding component, calcined gypsum, calcined aluminite, sodium metasilicate and dispersant in a kneader to mix for 20-30min and obtaining the product. The product has prominent grinding aid, and can increase the hourly output of mills by 10-15%, reduce the consumption of electricity, and increase the cement 3-day compression strength and the cement 7-day compression strength by more than 20% and the cement 28-day compression strength by 10-15%.

Description

technical field [0001] The invention belongs to the technical field of cement, in particular to cement grinding aids. Background technique [0002] Adding a small amount of grinding aids in the grinding process of the cement industry can increase the output under the same condition of cement fineness and mill power consumption, and can also increase the ratio of cement under the same condition of cement output and mill power. surface area, thereby increasing the strength and quality of the cement. However, there are two kinds of commercially available grinding aids, liquid and powder. Among them, the liquid has a better grinding effect, but the early strength and strengthening effects are not obvious; the powder has a better early strength effect, but the later strengthening and grinding effects are not obvious. . Since the implementation of the new cement standard, in order to give full play to the advantages of high clinker strength, some cement companies need to use pow...

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Problems solved by technology

[0003] In order to solve the problem that the current liquid grinding aid only has a good grinding effect, and has little effect on improving the early strength and later strength of cement; while the powder grinding aid only has a good early strength effect, and the grinding aid effect and cement strengthening effect are not significant. Technical problem, to provide a high-efficiency composite grinding aid with good grinding aid effect, which can not only make cement early strength but also strengthen later, and has better adaptability to different kinds of cement, and its production method

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