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Liquid grinding aid capable of promoting coagulating, and preparation method thereof

A grinding aid and liquid technology, which is applied in the field of coagulation-accelerating liquid grinding aid and its preparation, can solve the problems of restricting the popularization and application of cement grinding aid, unstable quality of grinding aid, fluctuation of cement quality, etc., and achieve adaptability Good performance, reasonable proportion, change the effect of hardness and strength

Active Publication Date: 2019-10-15
安徽海螺材料科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, triethanolamine is one of the main raw materials of grinding aids, accounting for about 70% of the total amount of grinding aids. The commercially available compound cement grinding aids has a large amount. At the same time, with the price increase of chemical raw materials such as petroleum , the price of triethanolamine is also rising, resulting in high cost of grinding aids, which seriously restricts the promotion and application of cement grinding aids; at the same time, the quality of commercially available grinding aids is unstable and the dosage is large, which leads to fluctuations in cement quality , unstable performance

Method used

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  • Liquid grinding aid capable of promoting coagulating, and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0025] A coagulation-promoting liquid grinding aid, which is made of the following components and mass fractions of raw materials: 5% aluminum sulfate, 5% magnesium sulfate, 40% modified alcohol amine organic small molecules, 3% sodium lignosulfonate %, calcium formate 1.5%, the rest is deionized water;

[0026] The modified small organic molecules of alcohol amines are prepared by the following method: the polyamines and the small organic molecules of epoxy are placed in a reaction vessel, the temperature is raised to 30° C., and after reacting for 1 hour under the action of a catalyst, the obtained Then add an organic acid to the solution and react for 0.5h to obtain a modified alcohol amine organic small molecule; the molar ratio of the polyamine, epoxy organic small molecule, catalyst and organic acid is: 1:2:0.001:2 .

[0027] The polyamines are ethylenediamine.

[0028] The epoxy organic small molecule is ethylene oxide.

[0029] The catalyst is ferric chloride.

[0...

Embodiment 2

[0039] A coagulation-promoting liquid grinding aid, which is made of the following components and mass fractions of raw materials: 7% aluminum sulfate, 7% magnesium sulfate, 42% modified alcohol amine small organic molecules, 5% sodium lignosulfonate %, calcium formate 2%, the rest is deionized water;

[0040] The modified small organic molecules of alcohol amines are prepared by the following method: the polyamines and the small organic molecules of epoxy are placed in a reaction vessel, the temperature is raised to 35° C., and after reacting for 1.5 hours under the action of a catalyst, the Add an organic acid to the obtained solution and react for 1 hour to obtain a modified alcohol amine organic small molecule; the molar ratio of the polyamine, epoxy organic small molecule, catalyst and organic acid is: 1.5:3:0.0015:3 .

[0041] The polyamines are p-phenylenediamine.

[0042] The epoxy organic small molecule is propylene oxide.

[0043] The catalyst is aluminum chloride...

Embodiment 3

[0053] A coagulation-promoting liquid grinding aid, which is made of the following components and mass fractions of raw materials: 8% aluminum sulfate, 8% magnesium sulfate, 43% modified alcohol amine small organic molecules, 6% sodium lignosulfonate %, calcium formate 2%, the rest is deionized water;

[0054] The modified small organic molecules of alcohol amines are prepared by the following method: the polyamines and the small organic molecules of epoxy are placed in a reaction vessel, the temperature is raised to 45° C., and after reacting for 2 hours under the action of a catalyst, the obtained Then add an organic acid to the solution and react for 1.5h to obtain a modified alcohol amine organic small molecule; the molar ratio of the polyamine, epoxy organic small molecule, catalyst and organic acid is: 2:4:0.002:3 .

[0055] The polyamines are 1,4-butanediamine.

[0056] The epoxy organic small molecule is 1,2-epoxybutane.

[0057] The catalyst is tin chloride.

[00...

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Abstract

The invention discloses a liquid grinding aid capable of promoting coagulating, and a preparation method thereof, and belongs to the technical field of cement additive. The liquid grinding aid capableof promoting coagulating is prepared from, by mass, aluminum sulfate of 5% to 15%, magnesium sulfate of 5% to 10%, modified alcohol amine small organic molecules of 40% to 50%, sodium lignosulfonateof 3% to 10%, calcium formate of 1.5% to 3%, and balance deionized water. According to the preparation method, aluminum sulfate and magnesium sulfate are mixed as a coagulating promoting main component, so that cement hydration process is accelerated; chemical imbalance caused by high content aluminium ions is capable of realizing dissolving of gypsum and C3A easily, promoting early stage generation of a large amount of ettringite, and realizing rapid coagulation; the modified alcohol amine small organic molecules are taken as a grinding aid enhancing component, and is high in stability; the preparation technology is simple; reaction is relatively mild; the liquid grinding aid is capable of promoting cement early stage rapid coagulation, and at the same time, early stage strength is ensured, later stage strength increasing is not influenced, and the adaptability on cement is excellent.

Description

technical field [0001] The invention belongs to the technical field of cement admixtures, and in particular relates to a coagulation-promoting liquid grinding aid and a preparation method thereof. Background technique [0002] Grinding aid refers to the admixture used in cement concrete, which can significantly improve the grinding efficiency of the mill, reduce power consumption and steel ball loss, and increase cement production. It can effectively shorten the grinding time, improve cement performance, save energy and reduce emissions. , has become recognized as an important cement additive. Cement grinding aids can be adsorbed on the high-energy active points of particle fracture fine grains, reduce free energy, and at the same time penetrate into fine particle crevices, provide foreign ions or molecules, reduce powder electrostatic effect, prevent coalescence, and increase the ratio of cement Increase the surface area and increase the content of 3-32μm cement particles....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/18C04B103/52
CPCC04B40/0039C04B2103/52C04B22/148C04B22/142C04B24/122C04B24/18C04B24/04
Inventor 王志强陈烽张辉宋南京司宏振吕晓秦尤敏冯恩娟李耀赵晓芳
Owner 安徽海螺材料科技股份有限公司
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