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Preparation method of enhanced fly ash grinding aid

A technology of fly ash and grinding aid, which is applied in the field of preparation of enhanced fly ash grinding aid, can solve the problems of reduced building strength, insufficient performance of clinker, difference in wear resistance, etc. Compressive and flexural strength, uncomplicated production and processing technology, and simple production and processing technology

Pending Publication Date: 2022-04-01
湖南格林朗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When mixing and grinding, due to the difference in wear resistance between the clinker and the mixed material in the cement, the performance of the clinker cannot be fully utilized, resulting in a waste of resources
Moreover, when cement clinker and mixed materials are put into the mill together for grinding, due to the intense and frequent friction and impact between the materials and between the materials and the grinding body, the materials will generate static electricity. Charged materials will be adsorbed on the surface of steel balls and grinding bodies, resulting in serious ball wrapping and forging phenomenon in cement mills, which will greatly reduce the output and quality of cement
In order to solve the above problems, the existing common method is the method of adding cement grinding aids. The existing cement grinding aids are mainly composed of triethanolamine and various chloride salts. Chloride salts are highly corrosive. When the cement grinding aid is mixed with cement, it will greatly increase the corrosion of building steel, reduce the building strength, and greatly shorten the service life of the building. At the same time, the existing grinding aid has low activity, and the grinding aid efficiency is low during use. , higher cost

Method used

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  • Preparation method of enhanced fly ash grinding aid
  • Preparation method of enhanced fly ash grinding aid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: a kind of preparation method of enhanced fly ash grinding aid is specifically as follows:

[0021] (1) Using concentrated sulfuric acid as a catalyst, mix triethanolamine and glacial acetic acid in a 1:1 molar ratio in a distillation flask, and react at a temperature of 130-140° C. for 6-8 hours;

[0022] (2) reclaim dehydrating agent and unreacted raw material by vacuum distillation, finally obtain A additive;

[0023] (3) Put 20 parts of 20-mesh fly ash into the ultrasonic mixer, and add 40 parts of Ca(OH) into the ultrasonic mixer 2 and 35 parts of CaCO 3 ;

[0024] (4) Adjust the ultrasonic mixer to keep the ultrasonic mixer at a frequency of 20-40KHz, stir at a temperature of 20-30°C for 3 hours, and dry to obtain the B additive;

[0025] (5) Mix 5 parts of additive A, 30 parts of additive B, 5 parts of gypsum and 5 parts of limestone, and stir to obtain enhanced fly ash grinding aid.

Embodiment 2

[0027] (1) Using concentrated sulfuric acid as a catalyst, mix triethanolamine and glacial acetic acid in a 1:1 molar ratio in a distillation flask, and react at a temperature of 130-140° C. for 6-8 hours;

[0028] (2) reclaim dehydrating agent and unreacted raw material by vacuum distillation, finally obtain A additive;

[0029] (3) Put 20 parts of 20-mesh fly ash into the ultrasonic mixer, and add 40 parts of Ca(OH) into the ultrasonic mixer 2 and 35 parts of CaCO 3 ;

[0030] (4) Adjust the ultrasonic mixer to keep the ultrasonic mixer at a frequency of 20-40KHz, stir at a temperature of 20-30°C for 3 hours, and dry to obtain the B additive;

[0031] (5) Mix 5 parts of additive A, 20 parts of additive B, 5 parts of gypsum and 5 parts of limestone, and stir to obtain a fly ash grinding aid.

Embodiment 3

[0033] (1) Using concentrated sulfuric acid as a catalyst, mix triethanolamine and glacial acetic acid in a 1:1 molar ratio in a distillation flask, and react at a temperature of 130-140° C. for 6-8 hours;

[0034] (2) reclaim dehydrating agent and unreacted raw material by vacuum distillation, finally obtain A additive;

[0035] (3) Put 20 parts of 20-mesh fly ash into the ultrasonic mixer, and add 40 parts of Ca(OH) into the ultrasonic mixer 2 and 35 parts of CaCO 3 ;

[0036] (4) Adjust the ultrasonic mixer to keep the ultrasonic mixer at a frequency of 20-40KHz, stir at a temperature of 20-30°C for 3 hours, and dry to obtain the B additive;

[0037] (5) Mix 5 parts of additive A, 40 parts of additive B, 5 parts of gypsum and 5 parts of limestone, and stir to obtain a fly ash grinding aid.

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Abstract

The invention discloses a preparation method of an enhanced fly ash grinding aid, and the specific method is as follows: firstly preparing an additive A, then preparing an additive B, then mixing the additive A, the additive B, gypsum and limestone according to a certain proportion, and stirring to obtain the enhanced fly ash grinding aid. According to the cement grinding aid, the stability of cement is guaranteed, the setting strength of the cement is enhanced, meanwhile, the compressive strength and the breaking strength of cement mortar are guaranteed, the prepared grinding aid is high in activity, the grinding efficiency is greatly improved, in the grinding process of the cement, the over-grinding reality and the ball and forging wrapping phenomena are avoided, the use amount of the cement is greatly reduced, and the cost is reduced. According to the invention, the carboxylic acid compound is used as the raw material, and the preparation process is free of chlorine element, so that the reinforcing steel bar cannot be rusted when the cement is used.

Description

technical field [0001] The invention belongs to the technical field of preparation of grinding aids, and relates to a preparation method of enhanced fly ash grinding aids. Background technique [0002] Grinding of cement includes two methods of separate grinding and mixed grinding. At present, the more commonly used method is mixed grinding. During mixing and grinding, due to the difference in wear resistance between the clinker and the mixed material in the cement, the performance of the clinker cannot be fully utilized, resulting in a waste of resources. Moreover, when cement clinker and mixed materials are put into the mill together for grinding, due to the intense and frequent friction and impact between the materials and between the materials and the grinding body, the materials will generate static electricity. The charged material will be adsorbed on the surface of the steel ball and the grinding body, causing serious ball wrapping and forging phenomenon in the cemen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/12C04B103/52
Inventor 文伯才文柏贞胡灏刘军峰
Owner 湖南格林朗科技有限公司
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