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A preparing method of a cement additive

A cement additive and cement powder technology, applied in the field of cement production, can solve the problems of low grinding efficiency, low cement strength, agglomeration, etc., and achieve the effects of simple and easy preparation, increased cement strength, and improved grinding efficiency

Inactive Publication Date: 2018-12-18
董彩琴
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, during the grinding process of cement production, the fine powder of the material in the mill is prone to agglomeration or adhering to the grinding body and the surface of the liner to form a cushion layer (buffer layer) due to electrostatic adsorption and high surface energy, resulting in grinding efficiency. not tall
As a result, a series of follow-up problems have arisen: large emissions of greenhouse gases such as carbon dioxide and sulfur dioxide have caused environmental pollution, unreasonable cement particle gradation has resulted in low cement strength; new industry regulations have continuously increased requirements for cement, especially for cement that can corrode The chloride ion content of metals has been clearly regulated, which greatly restricts the use of cement admixtures containing chloride ions; at present, industrial waste and mining waste are urgently needed to be digested and resolved by the cement industry, and these waste materials are similar to cement and have a certain Potential hydration activity, but the activity needs to be stimulated by external substances; this creates conditions for the use of cement additives

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A method for preparing cement additives, characterized in that the specific steps are:

[0013] (1) The mass fraction of each component in the cement additive is: sodium hydrogen acetate 3%, deionized water 70%, triisopropanolamine 8%, triethanolamine 12%, polyethylene glycol 6%, urea 1% ; The molecular weight of the polyethylene glycol is 200-700;

[0014] (2) Mix the components of step (1) evenly to obtain cement additives.

[0015] (3) The cement additive obtained in step (2) is added in the cement grinding process or added together with the mixing water when the cement is used, and the mass fraction of the cement additive is 0.3‰-0.8‰.

[0016] When the amount of cement additives in fly ash cement is 0.3‰ and 0.5‰, the early strength of fly ash cement increases by 1.5MPa and 3.5MPa, respectively; the later strength increases by 7MPa and 10MPa, respectively.

Embodiment 2

[0018] A method for preparing cement additives, characterized in that the specific steps are:

[0019] (1) The mass fraction of each component in the cement additive is: sodium hydrogen acetate 6%, deionized water 51%, triisopropanolamine 12%, triethanolamine 18%, polyethylene glycol 8%, urea 5% ; The molecular weight of the polyethylene glycol is 200-700;

[0020] (2) Mix the components of step (1) evenly to obtain cement additives.

[0021] (3) The cement additive obtained in step (2) is added in the cement grinding process or added together with the mixing water when the cement is used, and the mass fraction of the cement additive is 0.3‰-0.8‰.

[0022] When the content of cement additives in fly ash cement was 0.3‰ and 0.5‰, the early strength of fly ash cement increased by 1.8MPa and 4MPa, respectively; the later strength increased by 5MPa and 10MPa, respectively.

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PUM

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Abstract

A preparing method of a cement additive is disclosed. The cement additive includes, by mass, 3-6% of sodium acetate, 51-70% of deionized water, 8-12% of triisopropanolamine, 12-18% of triethanolamine,6-8% of polyethylene glycol and 1-5% of urea, with the molecular weight of the polyethylene glycol being 200-700. The method includes fully stirring and mixing the components to obtain the cement additive. The cement additive prepared by the method is added in a cement grinding process or added together with blending water when the cement is put into use, with the dosage of the cement additive being 0.03-0.08% by mass. The cement additive prepared can save electric consumption and coal consumption, can improve cement quality and performance, and has a cost lower than the average cost of products of the same type in China. The additive is simple and feasible to prepare.

Description

Technical field [0001] The invention relates to the technical field of cement production, in particular to a method for preparing cement additives. Background technique [0002] At present, during the grinding process of cement production, the fine powder of the material in the mill is easily agglomerated or attached to the surface of the grinding body and liner due to electrostatic adsorption and large surface energy to form a cushion (buffer layer), resulting in grinding efficiency not tall. As a result, a series of follow-up problems have arisen: large emissions of carbon dioxide, sulfur dioxide and other greenhouse gases cause environmental pollution; unreasonable cement particle gradation results in low cement strength; new industry regulations have continuously increased requirements for cement, especially the corrosion of cement The chloride ion content of metals has been clearly stipulated, which has greatly restricted the use of cement admixtures containing chloride ion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/32
CPCC04B40/0039C04B24/04C04B24/122C04B24/32C04B24/126
Inventor 董彩琴
Owner 董彩琴