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Liquid grinding aid for improving later strength of cement and preparation method of liquid grinding aid

A late-stage strength and grinding aid technology, applied in the field of liquid grinding aids, can solve problems such as the adaptability of grinding aids and admixtures, the lack of main raw materials for products, and unstable product quality, so as to prevent delamination or precipitation , good grinding effect, and the effect of improving the distribution of cement particles

Inactive Publication Date: 2021-03-09
山东天汇科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the following problems generally exist in the cement grinding aid industry in my country at present: (1) The product quality is unstable and the grinding aid effect is poor; (2) There are adaptability problems between grinding aids and admixtures; (3) There are ingredients harmful to the human body ; (4) The product has few main raw materials and poor stability

Method used

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  • Liquid grinding aid for improving later strength of cement and preparation method of liquid grinding aid
  • Liquid grinding aid for improving later strength of cement and preparation method of liquid grinding aid
  • Liquid grinding aid for improving later strength of cement and preparation method of liquid grinding aid

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preparation example Construction

[0056] The present invention also provides a preparation method of the modified diethanolamine, comprising the following steps:

[0057] 1) Dissolve a certain amount of sodium chloroacetate in deionized water and keep a constant temperature of 50-80°C;

[0058] 2) adding dropwise a sodium hydroxide solution with a concentration of 30-40% to the aqueous solution of sodium chloroacetate, controlling the pH value of the reaction system to be 10-12, and the temperature to be 55-65° C.;

[0059] 3) Add diethanolamine dropwise to the system for 1-2 hours;

[0060] 4) Control the temperature of the reaction system to 50-70° C. and react for 1-2 hours to obtain modified diethanolamine.

[0061] The molar ratio of sodium chloroacetate, sodium hydroxide, diethanolamine and deionized water is 0.8-1.2:0.8-1.2:0.8-1.2:5.

[0062] The present invention also provides the preparation method of described polycarboxylate urethane, comprises the following steps:

[0063] 1) Mix maleic anhydride...

Embodiment 1

[0076] A liquid grinding aid capable of improving the late strength of cement, consisting of the following raw materials in parts by weight:

[0077] 10 parts of glycerol,

[0078] 10 parts of modified diethanolamine,

[0079] 10 parts of polycarboxylate urethane,

[0080] 5 parts of anhydrous sodium sulfate,

[0081] 5 parts of ammonium acetate,

[0082] 2 parts paraffin oil,

[0083] 5 parts of sodium lignosulfonate,

[0084] 5 parts of calcium lignosulfonate,

[0085] 50 parts of deionized water.

[0086] The preparation method of described modified diethanolamine is as follows:

[0087] 1) Dissolve a certain amount of sodium chloroacetate in deionized water and keep a constant temperature of 50°C;

[0088] 2) adding dropwise a sodium hydroxide solution with a concentration of 30% in the sodium chloroacetate aqueous solution, controlling the pH value of the reaction system to be 10, and the temperature to be 55° C.;

[0089] 3) Add diethanolamine dropwise to the sy...

Embodiment 2

[0103] A liquid grinding aid capable of improving the late strength of cement, consisting of the following raw materials in parts by weight:

[0104] 30 parts of glycerol,

[0105] 30 parts of modified diethanolamine,

[0106] 30 parts of polycarboxylate urethane,

[0107] 15 parts of anhydrous sodium sulfate,

[0108] 15 parts of ammonium acetate,

[0109] 10 parts paraffin oil,

[0110] 7 parts of sodium lignosulfonate,

[0111] 7 parts of calcium lignosulfonate,

[0112] 5 parts sodium tripolyphosphate,

[0113] 70 parts of deionized water.

[0114] The preparation method of described modified diethanolamine is as follows:

[0115] 1) Dissolve a certain amount of sodium chloroacetate in deionized water and keep a constant temperature of 80°C;

[0116] 2) adding dropwise a sodium hydroxide solution with a concentration of 40% in the sodium chloroacetate aqueous solution, controlling the pH value of the reaction system to be 12, and the temperature to be 65° C.;

[...

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Abstract

The invention discloses a liquid grinding aid for improving the later strength of cement and a preparation method of the liquid grinding aid. The grinding aid is prepared from glycerol, modified diethanol amine, polycarboxylate alcohol amine ester, anhydrous sodium sulfate, ammonium acetate, paraffin oil, sodium lignin sulfonate, calcium lignosulphonate, sodium tripolyphosphate and deionized water. The grinding aid is simple in preparation process, low in cost, good in adaptability, capable of remarkably reducing the grinding energy consumption and improving the grinding efficiency and the later strength of cement, environmentally friendly, free of adverse effects on human health and good in application prospect.

Description

technical field [0001] The invention relates to the technical field of production and processing of cement grinding aids, in particular to a liquid grinding aid capable of improving the later strength of cement. Background technique [0002] The cement industry is an industry with high resource consumption, high energy consumption and high pollution. The energy consumption per unit product of my country's cement production is significantly higher than the world's advanced level. The total annual power consumption of the cement industry exceeds 10 billion kWh, which is about 9% of the country's total power generation. Every ton of cement needs to grind about 3 tons of various materials, and at the same time discharge 20kg of dust, as well as 0.8 tons of carbon dioxide, 2.4kg of sulfur dioxide, and 1.5kg of nitrogen oxides. The emissions of the three are respectively 27.10% of the total emissions of national industrial production. , 21.8%, 4.85%. And my country is a big ceme...

Claims

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Application Information

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IPC IPC(8): C04B24/36C04B103/52
CPCC04B40/0039C04B2103/52C04B24/026C04B24/122C04B24/28C04B22/147C04B24/12C04B24/36C04B24/18C04B22/16
Inventor 王超赵国庆王征夏凯
Owner 山东天汇科技有限公司
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