Cement grinding aid and preparation method thereof

A technology of cement grinding aid and silane coupling agent, which is applied in the field of cement additives, can solve the problems of urgent improvement of fineness and specific surface area, no obvious improvement of cement grinding energy consumption, and no obvious improvement of strength, etc., to achieve Both grinding aid and strengthening effect are excellent, improving grinding efficiency and enhancing effect are good

Active Publication Date: 2016-01-27
内蒙古同佳技术发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the current cement liquid grinding aids still have the following deficiencies in the role of cement grinding aids in the cement grinding process: 1. The grinding aid effect is unstable, and the fineness and specific surface area of ​​the ground cement need to be improved urgently; 2. The application of cement Performance, especially the impact on the strength of cement at various ages, so that the strength cannot be significantly improved; 3. The energy consumption of cement grinding is not significantly improved
Moreover, although the cement grinding aids currently on the cement grinding aid market can increase the amount of admixtures and reduce costs, they will affect the later strength of cement; and cement grinding aids with excellent performance have higher costs, and most of them are It is made of a mixture of small molecular organic matter. This type of grinding aid has poor stability, large fluctuations in the use effect, and narrow application. In order to increase the output, it is often necessary to increase the amount of grinding aid, which increases the cost of cement production.

Method used

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  • Cement grinding aid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A cement grinding aid is made from the following raw materials in parts by weight:

[0028] Polymerized polyol 13 parts; Triisopropanolamine 12 parts; Polyol ether 13 parts; Ethylene glycol 18 parts; Triethanolamine 25 parts; Molasses 17 parts; Lignin 13 parts; Sodium chloride 0.03 parts; Alkenyl silicon 0.5 parts of oxane; 40 parts of water.

[0029] The lignin is extracted from papermaking black liquor, and the extraction method is as follows: adding a mass fraction of 25% sulfuric acid solution to papermaking black liquor until the pH value of papermaking black liquor is 4, and adjusting the temperature of the black liquor to 50 ℃, there is a precipitate, and after standing for 2 hours, the precipitate is filtered, washed, and dried to obtain lignin.

[0030] The alkenyl siloxane is vinyltrichlorosilane, vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris(β-methoxyethoxy)silane, vinyltriacetic acid butylsilane, tri-tert-butoxyvinylsilane, vinyltri-tert-butylpero...

Embodiment 2

[0035] A cement grinding aid is made from the following raw materials in parts by weight:

[0036] Polymerized polyol 15 parts; Triisopropanolamine 8 parts; Polyol ether 15 parts; Ethylene glycol 15 parts; Triethanolamine 28 parts; Molasses 18 parts; Lignin 14 parts; Sodium chloride 0.04 parts; Aminosiloxane 0.6 parts; 43 parts of water.

[0037] The lignin is extracted from the papermaking black liquor. The extraction method is as follows: add a sulfuric acid solution with a mass fraction of 30% in the papermaking black liquor until the pH value of the papermaking black liquor is 3, and adjust the temperature of the black liquor to 55 ℃, there is a precipitate, and after standing for 1 hour, the precipitate is filtered, washed, and dried to obtain lignin.

[0038] The aminosiloxane is anilinomethyltrimethoxysilane, anilinomethyltriethoxysilane, N-(4-aminobutyl)aminomethyltriethoxysilane, γ-aminopropyltrimethoxysilane ylsilane, (3-aminopropyl)triethoxysilane, N-methyl-3-amin...

Embodiment 3

[0043] A cement grinding aid is made from the following raw materials in parts by weight:

[0044] Polymerized polyol 18 parts; Triisopropanolamine 10 parts; Polyol ether 12 parts; Ethylene glycol 20 parts; Triethanolamine 30 parts; Molasses 15 parts; Lignin 15 parts; Sodium chloride 0.05 parts; Vinyl trichloride 0.3 parts of silane, 0.5 parts of anilinomethyltriethoxysilane; 45 parts of water.

[0045] The lignin is extracted from the papermaking black liquor, and the extraction method is as follows: adding a sulfuric acid solution with a mass fraction of 25% in the papermaking black liquor until the pH value of the papermaking black liquor is 4, and adjusting the temperature of the black liquor to 53 ℃, there is precipitation, and after standing for 1.5 hours, the precipitate is filtered, washed, and dried to obtain lignin.

[0046] Described cement grinding aid, its preparation method, the steps are as follows:

[0047] (1) Take parts by weight of water in a reactor, heat...

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Abstract

The invention relates to a cement grinding aid, in particular to a cement grinding aid and a preparation method thereof. The cement grinding aid is prepared from, by weight, 13-18 parts of polymeric polylol, 8-12 parts of tri-isopropanolamine, 12-15 parts of polyol ether, 15-20 parts of ethanediol, 25-30 parts of triethanolamine, 15-18 parts of molasses, 13-15 parts of lignin, 0.03-0.06 part of sodium chloride, 0.5-1 part of silane coupling agents and 40-45 parts of water. By means of the obtained cement grinding aid, in the cement production process, the phenomena of clinker fine particle aggregation and ball pasting can be effectively improved, mobility of clinker particles is enhanced, thereby the pulverization effect of grinding media in a grinding machine for materials is enhanced, grinding efficiency can be improved by 15-20%, the cement machine-hour yield is increased, electricity consumption is greatly lowered, production cost is lowered, in addition, strength of cement at different ages can be remarkably improved, and flowability of the cement is improved.

Description

technical field [0001] The invention relates to a cement grinding aid, in particular to a cement grinding aid and a preparation method thereof, belonging to the technical field of cement additives. Background technique [0002] Cement grinding aids are process admixtures used to increase cement mill output, reduce cement grinding power consumption or / and increase cement fineness (grinding aid), or / and improve cement quality (for example: significantly increase cement strength) , The state stipulates that its addition should not exceed 0.5% of the cement mass. [0003] The equipment used in cement grinding operations is mainly ball mills, and the energy utilization rate of ball mills is less than 5%. The cement grinding operation consumes a large amount of electric energy, accounting for about 35% of the total electric energy consumption of cement production; moreover, the production of cement clinker as a semi-finished product of cement production needs to consume a large a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C04B24/38C04B24/12C04B24/02C04B103/52
Inventor 吴金文
Owner 内蒙古同佳技术发展有限公司
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