Cement raw material additive with grinding aiding and decomposition promoting effects

Abstract

The invention discloses a cement raw material additive with grinding aiding and decomposition promoting effects, and belongs to the technical field of building materials. The raw material additive comprises 10-40% of a grinding aid component, 10-40% of organic acid, 10-40% of a mineralization component and the balance of water. The grinding-aiding component, the organic acid component and the mineralization component in the additive are reasonably proportioned, so that the cement raw material additive which is excellent in comprehensive performance and has grinding aiding and decomposition promoting effects is obtained. According to the grinding aid component, the machine hour of the raw material can be remarkably improved, and the fineness of the raw material entering a kiln is improved; the addition of the organic acid can reduce the calcium carbonate decomposition surface activation energy, thereby reducing the calcium carbonate decomposition temperature and accelerating the calcium carbonate decomposition; and by adding the mineralization component, the firing temperature of the cement clinker can be reduced, the burnability of the clinker can be improved, and the 28d strength of the cement clinker can be improved by more than 3MPa. The additive disclosed by the invention is stable in quality, is an aqueous solution, is safe and harmless, is convenient to produce and transport, and is low in mixing amount and remarkable in effect.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a cement raw meal admixture with functions of grinding aid and decomposition acceleration. Background technique [0002] Cement is one of the three basic materials in the construction industry. It is widely used and used in large quantities. It is known as "the food of the construction industry". [0003] Today, the central issues of the world's cement industry are still resources, energy and environmental protection, and adding various cement additives to reduce energy consumption and environmental pollutant emissions in cement production is an effective way. At present, the types of domestic cement additives mainly include cement grinding aids, sulfur-fixing agents, mineralizers, and coal-saving combustion aids, which are respectively aimed at cement grinding, flue gas desulfurization, cement firing, and coal combustion. There are few studies on improvin...

AI Technical Summary

Problems solved by technology

[0004] Domestic cement raw meal additives are mainly concentrated in cement mineralization, and most of them use one or more kinds of fluorite, phosphate slag, various metal tailings, gypsum, etc. Compounding, although the effect is more significant, there are also the following defects: (1) the dosage is relatively large, generally above 1%; (2) the dosage of powder is used, and the measurement is inaccurate; (3) the quality of tailings fluctuates greatly, The working conditions of cement kilns fluctuate significantly; (4) The distribution of tailings is obvious and the transportation radius is limited

However, it has the following defects: (1) The chemical waste liquid used is hazardous waste, which will cause harm to human health during production and transportation; (2) The composition of the chemical waste liquid is unstable, the product quality fluctuates greatly, and the source is limited, making it difficult to comprehensively Popularization and application; (3) It contains a large amount of sodium, potassium and magnesium, which is a harmful component in cement production, which seriously affects the firing conditions of cement and the quality of cement clinker

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