Cement grinding aid, preparation method thereof and cement

A cement grinding aid and cement technology, which is applied in the field of cement manufacturing, can solve the problems of wide distribution of cement particles, limited grinding force, and rough products, and achieve a high electric charge capacity, excellent grinding effect, and high compressive strength. Effect

Pending Publication Date: 2022-07-08
唐山冀东水泥外加剂有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main components of related grinding aids are amine organic substances, polyol organic substances and inorganic salts. When using such liquid grinding aids compounded with small molecular substances, their stability is poor, the grinding aiding force is limited, and cement is prone to appear. Wide particle distribution and coarse product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0034] A kind of modified diethanolamine, its preparation method is as follows:

[0035] 1) In 17g of DMF, add 4.5g of diethanolamine and maleic anhydride with the same molar amount as diethanolamine, and stir and react for 4h at 25°C to obtain mixed solution A;

[0036] 2) Under nitrogen atmosphere, add 3g of methacrylic acid to the mixed solution A, after stirring, add 0.12g of initiator, which is azobisisobutyronitrile, heat to 75℃, stir for 22h, and then add 8g Sodium hydroxide solution with a concentration of 5 mol / L, rotary evaporation to obtain modified diethanolamine.

preparation example 2

[0038] A modified diethanolamine is different from Preparation Example 2 in that the initiator is an equal amount of azobisisoheptanenitrile, and the remaining steps are the same as those in Preparation Example 1.

Embodiment 1-3

[0041] A kind of cement grinding aid of embodiment 1-3, its each raw material is as shown in table 1, and its preparation step is as follows:

[0042] Add modified diethanolamine, sodium lignosulfonate and surfactant in water, stir until dissolved, then add triethanolamine and glycerol, stir until dissolved to obtain cement grinding aid.

[0043] Wherein, the modified diethanolamine is from Preparation Example 1; the surfactant is sodium dodecylbenzenesulfonate.

[0044] Table 1 Each raw material and the amount of each raw material (kg) of Examples 1-3

[0045] Example 1 Example 2 Example 3 Modified Diethanolamine 40 45 50 Surfactant 0.5 1 2 Triethanolamine 9 5 1 Glycerol 1 4 9 Sodium lignosulfonate 5 3 2 water 120 130 140

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PUM

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Abstract

The invention relates to the technical field of cement manufacturing, in particular to a cement grinding aid, a preparation method of the cement grinding aid and cement, and the cement grinding aid comprises the following raw materials in parts by weight: 40-50 parts of modified diethanol amine, 0.5-2 parts of a surfactant, 1-9 parts of triethanolamine, 1-9 parts of glycerol, 2-5 parts of sodium lignin sulfonate and 120-140 parts of water. Wherein the modified diethanol amine is obtained by reacting diethanol amine with maleic anhydride and then carrying out copolymerization reaction with methacrylic acid; the cement grinding machine has the advantage of improving the phenomenon that the product is rough during cement grinding.

Description

technical field [0001] The present application relates to the technical field of cement manufacturing, in particular to a cement grinding aid, a preparation method thereof, and cement. Background technique [0002] At present, with the rapid economic development and the improvement of living standards, the construction industry has gradually developed. In all kinds of construction, cement is an essential basic material. The cement industry has attracted much attention as a high energy consumption and high pollution industry. In the related art, when the cement is ground, a cement grinding aid is added to the cement to improve the grinding efficiency of the cement and achieve the purpose of developing green energy-saving cement and building a resource-saving and environment-friendly society. [0003] Cement grinding aids can be adsorbed on the surface of cement particles when the cement is ground, and exert physical and chemical effects. The output, or under the condition ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/18C04B7/52C04B103/52
CPCC04B40/0039C04B7/52C04B2103/52C04B24/026C04B24/18C04B24/122C04B24/12C04B22/16C04B24/16Y02W30/91
Inventor 郑伟任建波陈宏王立彬张露瑶边淑芳陈凤琪郭自刚刘禹杉苏晓强毛泽南
Owner 唐山冀东水泥外加剂有限责任公司
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