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Cement modifier and production and application method thereof

A technology of cement modifier and production method, which is applied in the field of cement modifiers, can solve problems such as environmental pollution, and achieve the effects of shortening the setting time, shortening the induction period, and shortening the initial setting time

Inactive Publication Date: 2014-01-15
四川利森建材集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the papermaking white mud is not handled properly, it will cause huge environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In the cement modifier of the present invention, papermaking white mud and cement rotary kiln dust are calculated as dry matter, and the cement modifier is obtained by mixing uniformly at a mass ratio of 1:1, based on the properties of kiln dust and The amount of kiln dust blended in the modifier is not high, and the chlorine content of the kiln dust does not need to be considered in this embodiment. The water content of the cement modifier should be fully volatilized during grinding.

[0029] When the cement modifier is used, it is calculated as a dry material, and it is blended into cement clinker for grinding together according to 4% of the total mass of cement.

Embodiment 2

[0031] According to the cement modifier of the present invention, papermaking lime mud and cement rotary kiln dust are calculated as dry matter, mixed evenly at a mass ratio of 1:1.5, and then the mixed components are dried with steam to contain water The ratio is not more than 1%, and the cement modifier is obtained. Based on the properties of the kiln dust and the blending amount of the raw material kiln dust in the modifier is not high, it is used directly without considering the chlorine content of the kiln dust in this embodiment.

[0032] When the cement modifier is used, it is calculated as a dry material, and it is blended into cement clinker for grinding together according to 7% of the total mass of cement.

Embodiment 3

[0034] The cement modifying agent of the present invention of the present invention, paper-making lime mud and cement rotary kiln kiln dust are calculated as dry matter, are 1:2 to mix evenly by mass ratio, in order to further improve cement quality, should consider in the present embodiment Chlorine content of kiln dust. When the chloride ion content of kiln dust is greater than 1.5%, add the homogenized mixed components into clean water and stir for washing. Since the particles of kiln dust are fine, let the washing components be washed at a temperature of 10-20°C. Aging for 3-6 hours, in order to facilitate the full overflow of chloride ions, due to the adoption of the scheme of washing the mixed components, it overcomes the shortcomings of washing the kiln dust alone because the kiln dust is too fine and easy to lose; machine to remove most of the water, dry the mixed components until the moisture content is not more than 1%, and obtain the finished cement modifier, filter ...

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PUM

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Abstract

The invention discloses a cement modifier and a production and application method thereof, particularly relates to a cement modifier which can effectively improve the pre-setting and final-setting time and water consumption of cement, and belongs to the technical field of cement production. The cement modifier composed of paper-making white clay and cement rotary kiln ash is directly mixed into cement clinkers, and the resulting mixture is ground and gets ready for use. The cement modifier using paper-making white clay and cement rotary kiln ash as raw materials, has low cost and high economic benefit, also reduces the environmental pollution and develops a new approach to utilization of paper-making white clay. The method can make full use of kiln ash in the cement industry, particularly kiln ash of a large-size predecomposition kiln with a bypass exhaust system, high-chloride ion kiln ash and even waste fly ash, so as to reduce the cost of cement enterprises. A cement product using the cement modifier is good in product quality and performance, and has low-alkali and chlorine-free characteristics, and achieves the purpose of shortening the cement pre-setting time while reducing the water consumption required for cement standard consistency.

Description

technical field [0001] The invention relates to a cement modifier and its production and use method, in particular to a cement modifier capable of effectively improving initial setting and final setting time and cement water consumption, and belongs to the technical field of cement production. Background technique [0002] The setting time of cement paste is of great significance to engineering construction. During the induction period of hydration, the plasticity of the cement slurry basically remains unchanged. As the hydration progresses, the slurry gradually loses its fluidity and begins to condense, and then the slurry continues to harden so that it completely loses its plasticity and has a certain mechanical strength. Therefore, the setting time of cement is divided into initial setting time and final setting time. The time from mixing cement with water to cement slurry beginning to lose plasticity is called initial setting time. From mixing cement with water to cement...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/00C04B22/06
Inventor 唐勇王邦万张继堂刘德强
Owner 四川利森建材集团有限公司