Cement grinding aid and preparation method thereof

A technology of cement grinding aids and amide compounds, which is applied in the field of cement grinding aids and its preparation, can solve problems such as poor product quality stability, and achieve good superimposed synergistic effect, low reaction temperature, and excellent grinding aid effect

Active Publication Date: 2018-06-12
北京金隅节能科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Under the severe situation of overcapacity in the cement industry, the pressure of energy conservation and emission reduction in the cement industry is increasing. Cement enterprises must truly meet the national requirements for energy conservation and consumption reduction. Cement production enterprises must pay attention to the use of grinding aids in the cement grinding process. However, the actual situation is not the case. At present, the main raw materials of grinding aid products in my country are less (the main raw materials are triethanolamine, diethanol monoisopropanolamine, triisopropanolamine), and the product quality stability is poor (using chemical by-products Synthetic products) and other defects affect the popularization and application of grinding aids, so it is urgent to develop a new cement grinding aid with stable quality and excellent grinding aid enhancement performance through experimental research, which will help my country's cement grinding aid industry. great development

Method used

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  • Cement grinding aid and preparation method thereof
  • Cement grinding aid and preparation method thereof
  • Cement grinding aid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Each raw material consumption of the cement grinding aid described in the present embodiment is respectively:

[0044] Diethanolamine 105g and hydroxyethyl acrylate 116g.

[0045] The preparation method of cement grinding aid described in the present embodiment, comprises the steps:

[0046] Weigh 105g of diethanolamine, add it to the reaction vessel, start stirring, set the stirring speed to 300rpm / min, and add 116g of hydroxyethyl acrylate dropwise to the reaction vessel at 20°C, and the dropping time is controlled at 1.5h. After the dropwise addition, react for 4 hours. After the reaction, the reaction liquid returns to room temperature, and the cement grinding aid can be obtained.

[0047] The cement grinding aid prepared by the present invention, after testing, consists of 48% by weight 19% ethylene glycol, 15% diethanolamine and 17% hydroxyethyl acrylate.

Embodiment 2

[0049] Each raw material consumption of the cement grinding aid described in the present embodiment is respectively:

[0050] Diethanolamine 157.5g and hydroxypropyl acrylate 130g.

[0051] The preparation method of cement grinding aid described in the present embodiment, comprises the steps:

[0052] Weigh 157.5g of diethanolamine, add it to the reaction vessel, start stirring, set the stirring speed to 300rpm / min, and add 130g of hydroxypropyl acrylate dropwise into the reaction vessel at 50°C, and the dropping time is controlled in 1h. After the dropwise addition, react for 0.5 h, and cool to room temperature after the reaction, the cement grinding aid can be obtained.

[0053] The cement grinding aid prepared by the present invention, after testing, consists of 49% by weight percentage Composition of 24% 1,2-propanediol, 22% diethanolamine and 5% hydroxypropyl acrylate.

Embodiment 3

[0055] Each raw material consumption of the cement grinding aid described in the present embodiment is respectively:

[0056] Diethanolamine 105g, hydroxyethyl methacrylate 60g and hydroxypropyl acrylate 60g.

[0057] The preparation method of cement grinding aid described in the present embodiment, comprises the steps:

[0058] Weigh 105g of diethanolamine, put it into the reaction container, start stirring, set the stirring speed to 300rpm / min, mix 60g of hydroxyethyl methacrylate and 60g of hydroxypropyl acrylate, and add dropwise at 40°C In the reaction vessel, the dropwise addition time is controlled at 1h. After the dropwise addition, react for 2 hours and cool to room temperature after the reaction, the cement grinding aid can be obtained.

[0059] The cement grinding aid prepared by the present invention, after testing, consists of 29% by weight 26% 13% 1,2-propanediol, 10% ethylene glycol, 12% diethanolamine, 5% hydroxyethyl methacrylate and 5% hydroxypropyl acr...

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Abstract

The invention relates to the technical field of cement additives, in particular to a cement grinding aid and a preparation method thereof. The cement grinding aid comprises an amide compound and a polyol compound. The preparation method includes: mixing and stirring diethanol amine and acrylate derivatives to perform ester aminolysis reaction so as to obtain the cement grinding aid. The cement grinding aid is capable of satisfying the standard requirements of the cement grinding aids, excellent in grinding aiding effect and quality stability, capable of increasing compressive strength and capable of being used along with an existing cement grinding aid to improve the quality stability of the existing cement grinding aid and increase the grinding aiding effect.

Description

technical field [0001] The invention relates to the technical field of cement admixtures, in particular to a cement grinding aid and a preparation method thereof. Background technique [0002] my country is the world's largest country in the production and use of cement market. The cement industry consumes limestone, coal ash, electricity and other resources and energy, as well as the industrial dust CO produced by the cement industry. 2 , SO 2 , NO x Such as atmosphere, bring huge environmental load to nature. In the total power consumption of the cement production process, the power consumption for raw material preparation and cement grinding accounts for more than 60%. From the development of cement industry grinding technology in recent decades, in order to improve the grinding situation, effective One of the methods is to add cement grinding aids during the grinding process. [0003] Cement grinding aid is an admixture added during cement grinding to aid in grinding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/12C04B103/52
CPCC04B40/0039C04B2103/52C04B24/124C04B24/026
Inventor 赵虎奎李方忠朱立新王振华赵志超孔令强王晓英刘洋秦怀侠宋肖贤任建波
Owner 北京金隅节能科技有限公司
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