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Raw material grinding aid used in cement clinker firing process

A technology of cement clinker and grinding aids, applied in the field of raw meal grinding aids, can solve the problems of low output of raw meal mills, poor quality of cement clinker, and low coal-saving efficiency, so as to reduce desulfurization costs and resist pressure Improve the strength and improve the effect of kiln production

Pending Publication Date: 2021-09-21
山西天润恒德新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a raw meal grinding aid used in the firing process of cement clinker, aiming to solve the problem of low desulfurization efficiency, high desulfurization cost, low output of raw meal mill, low coal saving efficiency, and problems in the prior art. The problem of poor material quality

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0027] The present inventors have conducted in-depth research on the raw materials and preparation methods of carbonyl pyraldehyde derivatives. The type of sulfonating agent, reaction temperature and the order of addition have a high impact on the dispersibility of carbonyl pyraldehyde derivatives. The preparation method of carbonylpyroaldehyde derivatives is as follows: add water, sodium sulfite, acetone and benzylidene acetone in sequence in a reaction flask with a reflux condenser, stir evenly, heat to 50-60°C for 1 hour; drop Add a certain amount of formaldehyde and 4-aminobutyraldehyde mixture, and keep the temperature at 65°C during the addition process; after the aldehyde is added, react at a constant temperature of 90°C for 3 hours; cool to room temperature, and it can be prepared. Wherein, the molar ratio of acetone, benzylidene acetone, formaldehyde and 4-aminobutanal is (0.7-0.95): (0.05-0.3): (1.6-1.95): (0.05-0.4), the molar ratio of sodium sulfite and acetone The...

Embodiment approach

[0029] As an embodiment of the present invention, the raw materials for the preparation of the raw meal grinding aid are: triterpene saponins, aliphatic water reducer, potassium carbonate, sodium carbonate, sodium formate, caprolactam and water.

[0030]As an embodiment of the present invention, the caprolactam can be prepared by cyclohexanone oxime and 85% sulfuric acid solution, the cyclohexanone oxime is prepared by the ammoximation reaction of cyclohexanone, and the cyclohexanone The oxidation reaction includes ammonia being oxidized to hydroxylamine by hydrogen peroxide under the action of a catalyst, and hydroxylamine and cyclohexanone undergoing an uncatalyzed reaction to generate cyclohexanone oxime.

[0031] The caprolactam of the present invention can be prepared by cyclohexanone oxime and 85% sulfuric acid solution, and the steps include: adding cyclohexanone oxime and 85% sulfuric acid in a reaction vessel, stirring and dissolving; then heating until the reaction be...

Embodiment 1

[0052] A raw meal grinding aid used in the firing process of cement clinker, the formula of the raw meal grinding aid in terms of mass ratio is 0.5% triterpene saponin, 5% aliphatic water reducer, 8% potassium carbonate, Sodium carbonate 2%, sodium formate 6%, caprolactam 30%, water 48.5%.

[0053] The aliphatic water reducer in this example is a carbonylpyroaldehyde derivative, and its preparation method is: add water, sodium sulfite, acetone and benzylidene acetone in sequence in a reaction flask with a reflux condenser, stir well , after heating to 50-60°C for 1 hour; drop a quantitative mixture of formaldehyde and 4-aminobutyraldehyde, and keep the temperature at 65°C during the feeding process; after the aldehyde is added, react at a constant temperature of 90°C for 3 hours; After cooling to room temperature, it can be prepared. Wherein, the molar ratio of the acetone, benzylidene acetone, formaldehyde and 4-aminobutyraldehyde is 0.92:0.08:1.85:0.15. In this embodiment,...

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Abstract

The invention is applicable to the technical field of cement production admixtures, and provides a raw material grinding aid used in a cement clinker firing process, the raw material grinding aid is brown liquid and comprises the following components in percentage by mass: 0.1-1% of triterpenoid saponin, 1-10% of aliphatic water reducer, 2-8% of potassium carbonate, 1-3% of sodium carbonate, 2-10% of sodium formate, 20-35% of caprolactam and the balance of water. A certain amount of water is taken to enter a reaction kettle, then stirring is started, heating is conducted till the liquid temperature reaches 70 DEG C, caprolactam is added, hydrolysis ring opening is conducted, sodium formate, sodium carbonate and potassium carbonate are sequentially added, stirring is conducted for 1-1.5 h, triterpenoid saponin and an aliphatic water reducer are added, stirring continues to be conducted for 1 h, the product is obtained, and the product is filtered and guided into a finished product storage tank. After the raw material grinding aid is adopted, the desulfurization efficiency can be up to 98% or above, the desulfurization cost is reduced, the yield of a raw material mill can be increased by 12-25%, the yield in the prior art can only be increased by about 10%, the cement clinker kiln yield can be increased by 10% or above, or standard coal can be saved by 5 kilograms or above, while the yield in the prior art can only be increased by about 5% or coal can be saved by about 3 kilograms.

Description

technical field [0001] The invention belongs to the technical field of cement production admixtures, in particular to a raw meal grinding aid used in the firing process of cement clinker. Background technique [0002] At present, the raw meal grinding aids in the cement clinker firing process on the market have poor desulfurization effect. Due to the fluctuation of sulfur content in raw materials and fuels, the emission of sulfur dioxide fluctuates. At the highest value, even after using raw meal grinding aids , also can not reach the national GB4915-2013 "Cement Industry Emission Standard of Air Pollutants" stipulated in the emission limit of sulfur dioxide, so that part of the cement clinker production line sulfur dioxide emission exceeds the standard, after being detected online by the environmental protection department, they face high fines, while powder The process of adding solid raw meal grinding aid is difficult, which also limits its use. Moreover, the desulfurizat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/42
CPCC04B7/42
Inventor 郭建华李阮
Owner 山西天润恒德新材料有限公司
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