A kind of white cement and its preparation method and application

Abstract

The invention belongs to the field of cement manufacturing, and in particular relates to white cement, and a preparation method and an application thereof. The white cement comprises the following components in parts by mass: 50-60 parts of white silicate cement clinker, 15-20 parts of sulfate aluminum cement clinker, 3-5 parts of silica fume, 5-10 parts of steel slag, 5-10 parts of phosphorus slag, 1-2 parts of quick lime, 0.03-0.05 part of triethanolamine and 2-3 parts of gypsum. The preparation process provided by the invention is simple in preparation method and low in production cost and the prepared white cement has the characteristics of being high in whiteness, bright in color and luster, high in early long-term strength, wear-resistant, corrosion-resistant, anti-freezing, good in atmospheric stability and low in heat of hydration and the like. The white cement provided by the invention, on the one hand, solves the problem that the stacked wastes pollute the environment and occupy lands, and on the other hand, recycles the wastes, so that the production cost of the cement is lowered, and the comprehensive property of the white cement is effectively improved; and therefore, an application prospect of environmental benefit, social benefit and economical benefit is realized.

Description

technical field [0001] The invention belongs to the field of cement manufacture, and in particular relates to a white cement and its preparation method and application. Background technique [0002] White cement, also known as white Portland cement, is made of raw materials with appropriate ingredients until they are partially melted, and the resulting white hydraulic cement is made of calcium silicate as the main component, and clinker with low iron content is added with an appropriate amount of gypsum. gelling material. White cement is mostly used for decoration. Its manufacturing process is better than ordinary cement, and it has higher whiteness and bright color. It is generally used as various building decoration materials, typically including stucco, sculpture, floor, terrazzo products, etc. , White Portland cement can also be used to make white and colored concrete components, and it is the largest decorative cement variety in production. [0003] As an independent ...

AI Technical Summary

Problems solved by technology

[0003] As an independent product of special cement, white cement not only requires high-quality raw materials and fuels, but also requires stricter management and production technology. The two most important indicators of white cement are whiteness and strength. White cement, most of which have poor whiteness, color and luster and low strength and quality, when used for jointing between white porcelain sheets, the effect is poor and the appearance of the product is reduced

[0004] In addition, the production process of white cement is complicated. The basic production process is "two grindings and one burning". After mixing various raw materials and fuels, they are first ground by a mill, then water is added to form balls, and then clinker is fired. Finally, a certain amount of cement is added. The gypsum is ground again, which is "two grinding and one burning", which consumes a lot of energy, costs high, and causes serious environmental pollution

It is usually difficult to achieve high strength and whiteness with existing technologies, and only one of them can be taken into account

In the production process, various measures need to be taken to control the content and state of the coloring components to improve the whiteness of the product; the selection of raw materials, equipment and process parameters is relatively strict, and the known high-strength components cannot be separated from the iron-aluminum components, which have high content and high strength. However, the whiteness decreases significantly, and it is difficult to find raw materials with low iron and aluminum components. In addition, it is not possible to increase too much iron material powder during grinding.

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