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Composite grinding aid, production method and uses thereof

A technology of grinding aids and organic aids, applied in the field of composite grinding aids, can solve the problems of cement grinding aids reducing energy consumption in the early and late stages, reducing the early and late strength of cement, and increasing cement water consumption. The effect of reducing unit power consumption, increasing water consumption, and improving compressive strength

Inactive Publication Date: 2011-09-14
魔水科技(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pozzolanic materials include slag, fly ash, slag, natural volcanic ash, etc. Most of the traditional grinding aids and reinforcing agents are suitable for the cement process mainly mixed with slag. At present, slag has become a scarce material in most areas, and the price It is expensive, but if fly ash and slag are used as the main additives instead of cement clinker, although the cost can be reduced, but with the increase of fly ash and slag, the early strength and later strength of cement will decrease, and the cement’s The water consumption of standard consistency has increased significantly, therefore, the market needs a new cement grinding aid for improving the early and late strength of cement mixed with fly ash while reducing water consumption
[0005] At present, there is no cement grinding aid on the market that can simultaneously reduce energy consumption, improve early and late strength, and do not increase the water consumption of cement at the same time.

Method used

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  • Composite grinding aid, production method and uses thereof
  • Composite grinding aid, production method and uses thereof
  • Composite grinding aid, production method and uses thereof

Examples

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preparation example Construction

[0024] Another embodiment of the present invention provides a kind of preparation method of composite grinding aid, comprises the following steps:

[0025] (1) at least one of polycarboxylic acid and lignin sulfonate, polyhydric fatty alcohol amine, polyhydric fatty alcohol, gluconate that will account for the 1-10% of grinding aid gross weight joins in the reactor, in Stir at room temperature to 100°C for 0.5 to 3 hours to obtain a mixed solution of organic additives for later use;

[0026] (2) at least one of 90-99% sodium silicate and sodium carbonate, sulfate calcined gypsum, and quick lime will be mixed and stirred in a stirrer while the organic compound described in step (1) is The additive mixed solution is evenly sprayed into the agitator, and continuously stirred for 20 to 30 minutes until the mixture is evenly mixed to obtain a composite grinding aid.

[0027] According to another preferred embodiment of the present invention, wherein the polyhydric fatty alcohol am...

Embodiment 1

[0035] Weigh 3g of triethanolamine, 50g of triisopropanolamine, 5g of ethylene glycol, 5g of propylene glycol, 5g of sodium gluconate, and 30g of sodium lignosulfonate, put them into the reaction kettle and stir in turn, and continue stirring when the temperature rises to 80°C After 60 minutes, a uniform mixed solution was prepared for subsequent use. Then weigh 100g of anhydrous sodium sulfate, 600g of calcined gypsum, 50g of quicklime, and 152g of sodium silicate, and put them into the mixer in turn to stir, and at the same time, spray the mixed solution prepared above evenly into the mixer, and continue stirring for 20 minutes to obtain the required Compound grinding aid. The addition weight percentage of this invention product in cement is 0.5%. The cement test results are shown in the table below. It can be seen that the 3-day and 28-day compressive strength increased by 3.1MPa and 5.7MPa respectively, and the water consumption of cement standard consistency decreased b...

Embodiment 2

[0039] Weigh 3g of triethanolamine, 3g of triisopropanolamine, 5g of ethylene glycol, 50g of glycerol, 30g of sodium gluconate, and 9g of polycarboxylic acid, put them into the reaction kettle and stir in turn, and continue stirring when the temperature rises to 95°C After 40 minutes, a uniform mixed solution was prepared for subsequent use. Then take by weighing 150g of anhydrous sodium sulfate, 80g of aluminum sulfate, 170g of calcined gypsum, 300g of quicklime, 200g of sodium carbonate, put into the mixer successively and stir, simultaneously the mixed solution of above-mentioned preparation is evenly sprayed in the mixer, continue to stir again 20 minutes, namely Get the required compound grinding aid. The addition weight percentage of this invention product in cement is 0.5%. The cement test results are shown in the table below. It can be seen that the 3-day and 28-day compressive strength increased by 2.6MPa and 4.3MPa respectively, and the water consumption of cement ...

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Abstract

The invention relates to a composite grinding aid for cement production and a preparation method and application thereof. The grinding aid contains 1 to 10 percent weight of organic aid and 90 to 99 percent weight of inorganic matrix material. The organic aid comprises at least one of polycarboxylic acid and lignosulphonate, C2-C5 polyfatty alcohols, C2-C5 polyfatty alcohol amines and gluconate, and the inorganic matrix material comprises at least one of sodium silicate and sodium carbonate, sulfate, calcined gypsum and calcium oxide. The invention also discloses the preparation method and the application for the composite grinding aid. The product can remarkably improve early and later strengths of cement, reduce the electric consumption of the grinding, and reduce the using amount of clinker. The compressive strength of the cement is obviously improved, the grinding efficiency is improved by between 10 and 20 percent, and the water consumption of the standard consistency of the cement is kept unchanged basically when 10 to 15 percent of the using amount of the clinker is reduced. The composite grinding aid is particularly suitable for a cement production technology which uses pulverized fuel ash and furnace bottom slag of coal-fired power plants as a composite material.

Description

technical field [0001] The present invention relates to a compound grinding aid used in the production of cementitious materials, its preparation method and its application, in particular, the present invention relates to a method that can reduce the power consumption of cement grinding and improve the early and late strength of cement in cement production. A solid compound reinforced grinding aid. Background technique [0002] Energy saving, emission reduction, and consumption reduction are major issues in cement production at present. There are currently two approaches. One is to try to reduce the power consumption of cement grinding, and the other is to replace part of the cement clinker with industrial solid waste to reduce cement production costs. , also reduces greenhouse gas emissions. [0003] The power consumption of cement grinding operation accounts for 70% of the power consumption of cement production, and the energy utilization rate of the ball mill used for gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/24C04B24/18C04B24/04C04B7/52C04B103/52
CPCC04B2103/52C04B40/0039Y02P40/10Y02W30/91C04B12/04C04B22/064C04B22/10C04B22/143C04B22/147C04B22/148C04B24/02C04B24/06C04B24/122C04B24/18C04B24/2641C04B28/00C04B18/08C04B18/141
Inventor 徐跃峰李俊录陈军庄起龙
Owner 魔水科技(北京)有限公司
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