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Efficient cement grinding aid

A cement grinding aid and high-efficiency technology, applied in the field of high-efficiency cement grinding aids, can solve the problems of corrosion of steel bars, affecting the service life and durability of concrete, and high potential safety hazards, so as to increase the compressive strength and improve the effect of grinding. , the effect of increasing production

Inactive Publication Date: 2019-08-20
JIANGXI WANNIANQING ENGINEERING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But existing cement grinding aid still has a lot of problems in use, as in order to strengthen the use effect of grinding aid, usually add a certain amount of chloride salt (as sodium chloride, calcium chloride etc.), but chloride ion The existence of the steel bars in the concrete will corrode, thus affecting the service life and durability of the concrete, and the safety hazard is relatively large

Method used

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Examples

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Embodiment 1

[0024] The present embodiment provides a kind of efficient cement grinding aid, comprises the component of following percentage by weight:

[0025] Modified triethanolamine 30%, triisopropanolamine 22%, modified glycerol 33%, modified molasses 5%, sodium thiocyanate 3.5%, expanded perlite 0.5%, cocamidopropyl betaine 3 %, calcium lignin sulfonate 3%.

[0026] In the above formula, the preparation method of the modified triethanolamine is: mix triethanolamine and maleic anhydride in a molar ratio of 2:1, and add 2% by weight of p-toluenesulfonic acid, and mix it uniformly again. Place it at 115° C. for 2.5 h to obtain triethanolamine maleate, and finally prepare triethanolamine maleate into an aqueous solution with a volume concentration of 50% with distilled water.

[0027] The preparation method of the modified glycerol is as follows: first mix glycerin and formic acid in a molar ratio of 1:1.2, then add 0.5% volume of sulfuric acid, mix again, and finally place it at 85°C f...

Embodiment 2

[0039] The present embodiment provides a kind of efficient cement grinding aid, comprises the component of following percentage by weight:

[0040] Modified triethanolamine 25%, triisopropanolamine 20%, modified glycerol 35%, modified molasses 6%, sodium thiocyanate 3.3%, expanded perlite 0.7%, cocamidopropyl betaine 5 %, calcium lignin sulfonate 5%.

[0041]In the above formula, the preparation method of the modified triethanolamine is: mix triethanolamine and maleic anhydride in a molar ratio of 2:1, and add 2% by weight of p-toluenesulfonic acid, and mix it uniformly again. Place it at 110° C. for 3 h to obtain triethanolamine maleate, and finally prepare triethanolamine maleate into an aqueous solution with a volume concentration of 50% with distilled water.

[0042] The preparation method of the modified glycerol is as follows: first mix glycerin and formic acid in a molar ratio of 1:1.2, then add 0.5% volume of sulfuric acid, mix again, and finally place it at 80°C for ...

Embodiment 3

[0055] The present embodiment provides a kind of efficient cement grinding aid, comprises the component of following percentage by weight:

[0056] Modified triethanolamine 35%, triisopropanolamine 25%, modified glycerol 30%, modified molasses 4%, sodium thiocyanate 2%, expanded perlite 0.3%, cocamidopropyl betaine 1.9 %, Calcium lignin sulfonate 1.8%.

[0057] In the above formula, the preparation method of the modified triethanolamine is: mix triethanolamine and maleic anhydride in a molar ratio of 2:1, and add 2% by weight of p-toluenesulfonic acid, and mix it uniformly again. Place it at 120° C. for 2 h to obtain triethanolamine maleate, and finally use distilled water to prepare triethanolamine maleate into an aqueous solution with a volume concentration of 50%.

[0058] The preparation method of the modified glycerol is as follows: first mix glycerin and formic acid in a molar ratio of 1:1.2, then add 0.5% volume of sulfuric acid, mix again, and finally place it at 90°C...

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Abstract

The invention relates to the field of production of cement and particularly relates to an efficient cement grinding aid. The cement grinding aid is prepared from the ingredients in percentage by weight: 25% to 35% of modified triethanolamine, 20% to 25% of tri-isopropanolamine, 30% to 35% of modified propanetriol, 4% to 8% of modified molasses, 2% to 5% of sodium thiocyanate, 0.3% to 0.5% of expanded perlite, 1% to 5% of surfactant and 1% to 5% of water reducer. The efficient cement grinding aid provided by the invention is free of chloride ions, the effect of pulverizing can be improved, theyield of a cement mill is increased, and the strength of cement prepared by adding the cement grinding aid provided by the invention is improved obviously.

Description

technical field [0001] The invention relates to the field of cement production, in particular to a high-efficiency cement grinding aid. Background technique [0002] At present, the country's requirements for low-carbon environmental protection are getting higher and higher, the price of cement is sluggish, the price of raw materials and energy is soaring, and the competition in the industry is fierce, which makes the benefits of cement enterprises stretched. In order to save energy and reduce emissions, develop a low-carbon economy, reduce cement production costs, and improve cement production efficiency, the most direct and effective method is to add a small amount of cement grinding aids in the cement grinding process. In the grinding process of cement clinker, adding a small amount of cement grinding aid can significantly improve the fluidity of cement, improve the grinding effect of the mill and the powder selection efficiency of the powder separator, and can improve th...

Claims

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Application Information

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IPC IPC(8): C04B24/38C04B103/52
CPCC04B40/0039C04B2103/52C04B24/122C04B24/02C04B24/38C04B22/14C04B14/185C04B2103/40C04B24/18
Inventor 余红忠徐世浪李斌刘明张建周勇
Owner JIANGXI WANNIANQING ENGINEERING CO LTD
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