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Special grinding aid for grinding cement by vertical mill and application thereof

A grinding aid and grinding technology, which is applied in the field of cement grinding aids, can solve problems such as strength attenuation, achieve the effect of improving cement strength, solving hydration agglomeration and strength attenuation problems

Active Publication Date: 2022-01-04
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

When it is used as a grinding aid for vertical mill grinding cement, it can realize no water spraying inside the vertical mill grinding cement mill, improve the vertical mill table, and significantly improve the strength of cement, which solves the problem of hydration agglomeration of stock cement. The problem of strength attenuation will not affect the performance and application of cement at the same time

Method used

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  • Special grinding aid for grinding cement by vertical mill and application thereof
  • Special grinding aid for grinding cement by vertical mill and application thereof
  • Special grinding aid for grinding cement by vertical mill and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A special grinding aid for vertical mill grinding cement, comprising the following raw materials in weight percentage: 20% of water-soluble polyester; 10% of sodium acetate; 5% of sodium sulfate; 10% of diethylene glycol; 5% of monoethanol diisopropanolamine %, water 50%.

[0028] The preparation method of the water-soluble polyester is: mixing diethanol monoisopropanolamine and oxalic acid in equimolar amounts, adding catalyst ethylene glycol antimony, and the consumption of catalyst is diethanol monoisopropanolamine and oxalic acid 0.01% of the total mass; react at 160°C for 2h under the protection of an inert gas; then decompress the system to below -0.1MPa, and continue to react at 250°C for 1h to obtain a water-soluble polyester.

[0029] The preparation method of the special grinding aid for vertical mill grinding cement is as follows: mixing and stirring each raw material in the formula amount evenly.

Embodiment 2

[0031] A special grinding aid for vertical mill grinding cement, comprising the following raw materials in weight percentage: 10% of water-soluble polyester; 10% of sodium chloride; 10% of sodium citrate; 10% of triethanolamine; 60% of water.

[0032] The preparation method of described water-soluble polyester is: neopentyl glycol, glycerol, trimethylol propane, methyl succinic acid, azelaic acid, 1,3-isophthalic acid-5-sodium sulfonate according to The molar ratio is 1:1:1:1:1:1, and p-toluenesulfonic acid and phosphorous acid are added as a catalyst with a molar ratio of 1:1. The amount of the catalyst is 0.1% of the total mass of the polymerized monomers; The reaction was carried out at 120°C for 2 hours under the protection of a protective film; then the system was decompressed to below -0.1MPa, and the reaction was continued at 200°C for 1 hour to obtain a water-soluble polyester.

[0033] The preparation method of the special grinding aid for vertical mill grinding cemen...

Embodiment 3

[0035] A special grinding aid for vertical mill grinding cement, comprising the following raw materials in weight percentage: 40% of water-soluble polyester; 5% of sodium stearate; 2.5% of ethylene glycol; 2.5% of propylene glycol; 10% of triisopropanolamine ; Water 40%.

[0036] The preparation method of the water-soluble polyester is as follows: triethanolamine, monoethanol diisopropanolamine and succinic acid are mixed according to a molar ratio of 1:1:2, and stannous chloride is added as a catalyst, and the consumption of the catalyst is 0.15% of the total mass; under the protection of an inert gas, react at 200°C for 4h; then depressurize the system to below -0.1MPa, and continue to react at 350°C for 1h to obtain a water-soluble polyester.

[0037] The preparation method of the special grinding aid for vertical mill grinding cement is as follows: mixing and stirring each raw material in the formula amount evenly.

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Abstract

The invention discloses a special grinding aid for grinding cement by a vertical mill and application thereof. The grinding aid comprises the following raw materials in percentage by weight: 5-40% of water-soluble polyester; 5-20% of an inorganic dispersion enhancer; 5-20% of polyol or alcohol amine; 40-70% of water; in the formula of the special grinding aid for grinding the cement by the vertical mill, the high viscosity of the water-soluble polyester can inhibit the dispersion effect of the grinding aid in the grinding process so as to stabilize the material layer, the material is sufficiently ground by the grinding roller on the grinding disc, and along with the proceeding of the cement grinding, the water-soluble polyester is hydrolyzed or cracked into polyol, and / or alcohol amine, polybasic acid and a low-molecular-weight water-soluble polyester polymer in a high-temperature and alkaline environment under the grinding pressure of the grinding roller, and the low-molecular-weight water-soluble polyester polymer is matched with polyol, and / or alcohol amine and an inorganic dispersion enhancer in the formula of the grinding aid to improve the dispersity of the ground fine powder and improve the powder selecting efficiency.

Description

technical field [0001] The invention belongs to the field of cement grinding aids, and in particular relates to a special grinding aid for vertical mill grinding cement and an application thereof. Background technique [0002] Vertical mill is an ideal large-scale grinding equipment, which is widely used in cement, electric power, metallurgy, chemical industry, non-metallic minerals and other industries. It integrates crushing, drying, grinding, grading and conveying, and has high production efficiency. It can grind block, granular and powder raw materials into required powder materials. Compared with the ball milling process, it has obvious advantages. It is gradually accepted by domestic cement enterprises due to its simple process, small footprint, high grinding efficiency and low energy consumption. [0003] Cement grinding aid is a process admixture added during cement grinding. The addition of grinding aid can greatly improve the cement grinding process and increase ...

Claims

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Application Information

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IPC IPC(8): C04B24/28C04B103/52
CPCC04B40/0039C04B24/283C04B2103/52C04B24/04C04B22/147C04B24/023C04B24/122C04B22/124C04B24/06C04B24/085C04B24/02Y02P40/10
Inventor 孟凡军陈烽曾君赵伟潘玉杰武春江张胜男
Owner 安徽海螺材料科技股份有限公司