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Cement grinding aid and preparation method thereof

A technology of cement grinding aids and surfactants, which is applied in the field of cement grinding aids and its preparation, which can solve the problems of restricting the production cost control of cement grinding aids, poor strength stability, and unstable quality, and achieve the elimination of ball paste Grinding phenomenon, enhanced compressive strength, improved grinding fineness and specific surface area

Inactive Publication Date: 2020-01-21
衡阳县海华水泥有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the domestic research and application of cement grinding aids, there are two types of liquid grinding aids and solid grinding aids, mainly amines, alcohols, alcohol amines, lignosulfonates, fatty acids and their salts and Alkane sulfonate substances, unstable quality, large dosage, poor strength stability
At the same time, there is also the problem of high purchase price, which restricts the production cost control of cement grinding aids

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Select 2200g of triethanolamine, 1800g of polyol, 1000g of modified cyanamide, 1000g of pulp, 900g of molasses, 1100g of biochemical waste liquid, 500g of surfactant, 500g of magnesium silicate, and 1000g of water as raw materials to prepare cement grinding aid. Among them, the pulp is virgin pulp from paper mills, and the fiber solid content is 12%; the surfactant is monolauryl phosphate; the biochemical waste liquid is forest product waste fermentation waste liquid; the polyol is ethylene glycol and glycerine Alcohol mass ratio of 4:3 mixture.

[0031] During preparation, add water, triethanolamine, and modified cyanamide into the reaction kettle, stir for 30 minutes at a speed of 300r / min, then add polyol, stir for 110 minutes at a speed of 800r / min, and obtain the mixture Add pulp, molasses and magnesium silicate, control the reaction kettle at 80°C and 900r / min, stir for 100 minutes, keep it warm for 80 minutes, add biochemical waste liquid and surfactant and stir ...

Embodiment 2

[0033] Select 2200g of triethanolamine, 1800g of polyol, 800g of modified cyanamide, 1000g of pulp, 900g of molasses, 1800g of biochemical waste liquid, 600g of surfactant, 400g of magnesium silicate and 500g of water as raw materials to prepare cement grinding aid. Wherein, the pulp adopts the waste paper pulp after waste paper recovery treatment, wherein the content of fiber solids is 16%; the surfactant is the mass ratio of disodium lauryl sulfosuccinic acid monoester and monolauryl phosphate 1: 1; the biochemical waste liquid is the fermentation waste liquid of forestry waste, that is, the fermentation waste liquid after landfill fermentation of the roots, stems, branches and other parts of woody plants with high lignin content, and passes through hydrogen before use. The sodium oxide solution is mixed for modification pretreatment; the polyol is a mixture of ethylene glycol, glycerol and pentaerythritol in a mass ratio of 1:1:1.

[0034] During preparation, add water, tri...

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Abstract

The invention discloses a cement grinding aid, which is prepared from triethanolamine, polyol, modified cyanamide, paper pulp, molasses, biochemical waste liquid, a surfactant, magnesium silicate andwater as raw materials, and is prepared by the following steps: adding water, triethanolamine and modified cyanamide into a reaction kettle, carrying out stirring reaction, adding polyol, and continuing stirring the components to obtain a mixture; and adding paper pulp, molasses and magnesium silicate into the mixture, controlling the temperature of the reaction kettle to be 75-80 DEG C and the speed to be 600-900 r / min, stirring the mixture, performing standing treatment with heat preservation, adding biochemical waste liquid and a surfactant, and carrying out stirring reaction for 10-15 minto obtain the cement grinding aid. The cement grinding aid is low in manufacturing cost, the grinding efficiency of a mill system can be obviously improved, hydration reaction of cement is induced, and the strength of the cement at all ages is improved.

Description

technical field [0001] The invention relates to the field of admixtures in cement production technology, in particular to a cement grinding aid and its preparation method and application. Background technique [0002] With the implementation of the sustainable development strategy, resource, energy and environmental issues greatly restrict the development of the cement industry. When cement production enterprises produce cement, in order to solve the problems of high grinding power consumption and low grinding efficiency in the cement production process, cement grinding aids are usually added to the cement cement grinding process for grinding aid, and the amount of very little Cement grinding aids can improve the gradation of cement particles, improve grinding efficiency and cement quality indicators. consumption and reduce emissions of air pollutants. [0003] At present, the domestic research and application of cement grinding aids, there are two types of liquid grindi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/16C04B24/12C04B103/52
CPCC04B40/0039C04B2103/52C04B24/122C04B24/02C04B24/125C04B24/001C04B24/10C04B24/16C04B24/003C04B22/08
Inventor 刘品张桂
Owner 衡阳县海华水泥有限责任公司
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