Cement grinding aid reinforcing agent and preparation method thereof

A grinding aid and cement technology, which is applied in the field of cement admixtures, can solve the problems of unstable performance, high price and high cost of cement grinding aid enhancer, and achieves obvious grinding aid enhancement effect and stable performance. , the effect of low dosage

Active Publication Date: 2012-06-20
安徽海螺材料科技股份有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, since the cement grinding aid enhancer reported above is prepared by a simple physical mixing method, the performance of the cement grinding aid enhancer is unstable, and phenomena such as precipitation and deterioration are prone to occur in practical applications; secondly, the above cement grinding aid enhancer The triethanolamine used in the process is a downstream product of the petrochemical industry, and the price is relatively high, which makes the cost of cement grinding aids high

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] The invention discloses a preparation method of a cement grinding aid enhancer, which comprises the following steps:

[0031] Step a) Under the action of a catalyst, the urea and the first formaldehyde are subjected to an addition reaction in water;

[0032] Step b) subjecting the reaction product of the addition reaction, sodium p-aminobenzene sulfonate and the second formaldehyde to a condensation reaction to obtain a cement grinding aid enhancer.

[0033] In the above preparation process, the present invention first uses the addition reaction of urea and formaldehyde to prepare methylolurea with a molecular structure similar to triethanolamine with grinding aid enhancement effect, and then combines methylolurea, formaldehyde and formaldehyde with strong surface activity. The polycondensation reaction of sodium p-aminobenzene sulfonate is carried out to prepare a macromolecular substance with a grinding-assisting and enhancing effect.

[0034] The step a) is specifically: ste...

Example Embodiment

[0046] Example 1

[0047] (1) Add 60g of urea and 60g of water into the reaction flask, stir until the urea is dissolved, add 10g of sodium hydroxide; heat the system to 50°C, drop 100g of formaldehyde solution within 1h, and continue the reaction for 1h;

[0048] (2) Add 50g of sodium p-aminobenzene sulfonate into the reaction flask, continue to stir and keep the above temperature unchanged, start to drip the remaining 65g of formaldehyde solution, and keep it for completion within 2 hours;

[0049] (3) The reaction system is heated to 75° C., and the reaction is maintained for 3 hours; then the temperature is lowered and the material is discharged to obtain a light red liquid, namely, a cement grinding aid enhancer.

Example Embodiment

[0050] Example 2

[0051] (1) Add 70g of urea and 70g of water to the reaction flask, stir until the urea is dissolved, add 15g of potassium hydroxide; heat the system to 55°C, drop 182g of formaldehyde solution within 2h, and continue the reaction for 1h;

[0052] (2) Add 50g of sodium p-aminobenzene sulfonate into the reaction flask, continue to stir and keep the above temperature unchanged, start to drip the remaining 78g of formaldehyde solution, and keep the addition completed within 2.5 hours;

[0053] (3) The reaction system is heated to 80° C., and the reaction is maintained for 4 hours; then the temperature is lowered and the material is discharged to obtain a light red liquid, namely, a cement grinding aid enhancer.

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Abstract

The invention discloses a preparation method of a cement grinding aid reinforcing agent, which comprises the following steps: adding first formaldehyde to urea in water in the presence of a catalyst; condensing the product of the addition reaction, sodium sulfanilate and a second formaldehyde; and obtaining the cement grinding aid reinforcing agent. Designed on the basis of a molecular structure,the preparation method provided by the invention bonds reinforcing and grinding aiding active functional groups into a molecular chain and synthesizes the homogenous material which is insusceptible to temperature, pH value and the like and has stable performance by chemical reactions. Experiment results indicate the method does not need a triethanolamine raw material and that the prepared cement grinding aid reinforcing agent is doped in small amount and has obvious grinding aiding function and stable performance.

Description

technical field [0001] The invention relates to the technical field of cement admixtures, in particular to a cement grinding aid enhancer and a preparation method thereof. Background technique [0002] Energy saving and consumption reduction and improvement of cement quality are long-term and important tasks of my country's cement industry. Among them, the crushing and powder links in the cement production process are the main factors affecting cement quality and energy consumption in the whole production process. For example, in the cement grinding process In the process, when the fineness of cement increases, the fine particles of cement tend to aggregate, which leads to a sharp decline in the grinding efficiency of cement. Cement grinding aid enhancer is an additive that has grinding aid without damaging the performance of cement. The promotion and selection of suitable cement grinding aid enhancer can greatly improve the efficiency of cement powder. Further, the cement g...

Claims

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Application Information

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IPC IPC(8): C08G12/12C08G12/08C04B24/22C04B103/52
Inventor 宋南京赵洪义朱化雨孟凡军徐明双
Owner 安徽海螺材料科技股份有限公司
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