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Cement grinding aid

A cement grinding aid and catalyst technology, applied in the field of cement grinding aids, can solve problems such as poor adaptability, and achieve the effects of good grinding aid effect, increasing diffusion rate and improving early performance.

Active Publication Date: 2019-03-22
SHANDONG HONGYI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the unique molecular structure of alcohol amines such as triethanolamine and triisopropanolamine has good adsorption, dispersion and induction of early hydration, which can improve cement grinding efficiency and early strength, but in the face of many varieties of cement and The adaptability of various types of industrial solid waste as mixed materials is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A cement grinding aid is composed of the following raw materials in parts by weight: 40 parts of nitrilotriacetic acid and ethylene glycol reactant, 20 parts of isooctanyl phosphate, 15 parts of alcohol amine compound, and 8 parts of surfactant; The reactant of nitrilotriacetic acid and ethylene glycol is prepared by the following method: adding ethylene glycol in molar ratio: nitrilotriacetic acid=0.8:1 into the reactor, and then adding 2% of the total mass of nitrilotriacetic acid and ethylene glycol Catalyst, stirred, heated up to 120°C for 4 hours of constant temperature reaction, and lowered to room temperature to obtain the reactant of nitrilotriacetic acid and ethylene glycol.

[0021] The catalyst is sulfamic acid.

[0022] The isooctyl phosphate is isooctyl phosphate monoester.

[0023] The alcohol amine compound is diethanol monoisopropanolamine.

[0024] The surfactant is polyoxyethylene octylphenol ether.

Embodiment 2

[0026] A cement grinding aid, which is composed of the following raw materials in parts by weight: 55 parts of nitrilotriacetic acid and ethylene glycol reactant, 15 parts of isooctyl phosphate, 20 parts of alcohol amine compound, and 3 parts of surfactant; The reactant of nitrilotriacetic acid and ethylene glycol is prepared by the following method: adding ethylene glycol in molar ratio: nitrilotriacetic acid=1.5:1 into the reactor, and then adding 0.5% of the total mass of nitrilotriacetic acid and ethylene glycol Catalyst, stirred, heated up to 150°C for 3 hours at a constant temperature, and cooled down to room temperature to obtain the reactant of nitrilotriacetic acid and ethylene glycol.

[0027] The catalyst is concentrated sulfuric acid.

[0028] The isooctyl phosphate is isooctyl phosphate diester.

[0029] The alcohol amine compound is monoethanol diisopropanolamine.

[0030] The surfactant is polyvinylpyrrolidone.

Embodiment 3

[0032] A cement grinding aid, which is composed of the following raw materials in parts by weight: 50 parts of nitrilotriacetic acid and ethylene glycol reactant, 18 parts of isooctyl phosphate, 17 parts of alcohol amine compound, and 5 parts of surfactant; The reaction product of nitrilotriacetic acid and ethylene glycol is prepared by the following method: adding 1% of the total mass of nitrilotriacetic acid and ethylene glycol into the reactor at a molar ratio of ethylene glycol: nitrilotriacetic acid = 1:1 Catalyst, stirred, heated up to 130°C for 3.5 hours at a constant temperature, and cooled down to room temperature to obtain the reactant of nitrilotriacetic acid and ethylene glycol.

[0033] The catalyst is boric acid.

[0034] The isooctyl phosphate is formed by mixing isooctyl phosphate diester and isooctyl phosphate monoester according to a molar ratio of 2.5:1.

[0035] The alcohol amine compound is monoethanol diisopropanolamine.

[0036] The surfactant is sodiu...

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Abstract

The invention discloses a cement grinding aid, and belongs to the technical field of additives of a cement process. The grinding aid comprises the following raw materials in parts by weight: 40-55 parts of reactants of nitrilotriacetic acid and ethylene glycol, 15-20 parts of iso-octanol phosphate, 15-20 parts of an alcohol-amine compound and 3-8 parts of a surfactant, wherein the reactants of thenitrilotriacetic acid and the ethylene glycol are prepared by the following steps: adding ethylene glycol and nitrilotriacetic acid into a reactor at a molar ratio of (0.8-1.5):1, adding a catalyst with the weight being 0.5-2% of the total weight of the nitrilotriacetic acid and the ethylene glycol into the reactor, stirring the mixture, raising the temperature to 120-150 DEG C, performing a thermostatic reaction for 3-4h and reducing the temperature to room temperature to obtain the grinding aid. In the product disclosed by the invention, under the 0.01%-0.015% of mixing volume, the 3d (three-dimensional) strength can be improved by 4MPa or more, and the 28d (twenty eight-dimensional) strength can be improved by 6MPa or more, therefore, the grinding aid has good effects of grind aiding and reinforcement, and the grinding efficiency of high-volume smelting slag cement can be obviously improved.

Description

technical field [0001] The invention belongs to the technical field of cement process admixtures, in particular to a cement grinding aid. Background technique [0002] Cement grinding aid is an admixture added during cement grinding to aid in grinding without harming human health and cement concrete performance. The power consumption of cement grinding not only saves the cost of cement production and increases the economic benefits of the enterprise, but also facilitates the comprehensive utilization of industrial waste, realizes low-carbon, circular economic production, and accelerates the process of energy conservation and emission reduction in the cement industry and the green revolution. a good helper. [0003] At present, the cement grinding aids used in China are still produced by the technical route of preparing alcohol amines such as triethanolamine and triisopropanolamine as the main raw materials. Although the unique molecular structure of alcohol amines such as ...

Claims

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Application Information

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IPC IPC(8): C04B24/32C04B24/26C04B24/20C04B103/52
CPCC04B40/0039C04B2103/52C04B24/121C04B24/003C04B24/122C04B24/32C04B24/2652C04B24/20
Inventor 冯恩娟司宏振秦尤敏董芹玺宋南京李耀王志强张辉
Owner SHANDONG HONGYI TECH
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