Composite cement grinding aid and preparation method thereof
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A compound cement and grinding aid technology, which is applied in the field of cement manufacturing, can solve the problems of single function, insufficient attention to cement performance and quality, etc., and achieve the effects of improving adaptability, reducing over-grinding phenomenon, and promoting hydration rate
Inactive Publication Date: 2012-12-26
ZHEJIANG HUAJUN BUILDING MATERIAL
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Problems solved by technology
At present, the cement grinding aids produced have a single function, especially in the improvement of cement performance and quality.
Method used
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Embodiment 1
[0022] Weigh each component according to the following mass percentages, diethylene glycol 3.2%, triethanolamine 2.8%, diethanol monoisopropanolamine 22.6%, molasses 4.0%, potassium chloride 1.0%, sodium chloride 5%, polymeric alcohol amine 20%, water 41.4%.
[0023] Put the macromolecule surfactant and water into the reaction kettle, add molasses, potassium chloride, sodium chloride, homogenize (stir well) for 30 minutes, add diethanol monoisopropanolamine, homogenize (stir well ) for 30 minutes, then add diethylene glycol and triethanolamine, homogenize (fully stir evenly) for 60 minutes, and filter through a 200-mesh filter screen to discharge and load into barrels.
Embodiment 2
[0025] Weigh each component according to the following mass percentages, diethylene glycol 3.3%, triethanolamine 3.1%, diethanol monoisopropanolamine 23.0%, molasses 4.3%, potassium chloride 1.2%, sodium chloride 7%, macromolecular surface Active agent polyalcohol amine 25%, water 33.1%.
[0026] Stir diethylene glycol, triethanolamine, diethanol monoisopropanolamine, molasses, potassium chloride, sodium chloride, macromolecule surfactant and water evenly, and react for 2 hours to obtain a composite cement grinding aid.
Embodiment 3
[0028] Weigh each component according to the following mass percentages, diethylene glycol 3.2%, triisopropanolamine 3%, diethanol monoisopropanolamine 23%, molasses 4.2%, potassium chloride 1.1%, sodium chloride 6%, Polymerized alcohol amine 22%, water 37.5%.
[0029] Stir diethylene glycol, triisopropanolamine, diethanol monoisopropanolamine, molasses, potassium chloride, sodium chloride, macromolecule surfactant and water evenly, and react for 2.5 hours to obtain a composite cement grinding aid.
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Abstract
The invention discloses a composite cement grinding aid and its preparation method. According to a formula, the composite cement grinding aid comprises: a grinding agent, a reinforcing agent, a surfactant, molasses, N, N-bis(2-hydroxyethyl)isopropanolamine and water. The composite cement grinding aid can enhance the fluidity of materials during grinding, effectively reduce overgrinding phenomenon of a mill, improve adhesion of the materials to a grinding body, a lining board, and a bin partition board as well as the self agglomeration phenomenon of the materials, thus increasing the machine-hour yield of the cement grinding mill by l0%-20%, enhancing the cement specific surface area to 20-40m<2>/Kg, reducing the sieve residue, optimizing cement particle gradation, promoting cement clinker hydration, and improving the cement mixture activity. The 3-day compressive strength is increased by 3-5MPa, and the 28-day compressive strength is increased by 4-8MPa. The clinker consumption is reduced by 6-10%. The cement production cost is effectively reduced, the cement security is improved, and the adaptability of cement and concrete admixtures are improved.
Description
technical field [0001] The invention relates to the technical field of cement production, in particular to a composite cement grinding aid and a preparation method thereof. Background technique [0002] Cement grinding aid is a chemical additive that improves the grinding effect and performance of cement. It can significantly increase the output of cement table, the strength of cement of all ages, and improve its fluidity. Cement grinding aids can greatly reduce the phenomenon of electrostatic adsorption and ball formation during the grinding process, and can reduce the tendency of re-agglomeration of ultrafine particles formed during the grinding process. Cement grinding aids can also significantly improve the fluidity of cement, improve the grinding effect of the mill and the powder selection efficiency of the powder separator, thereby reducing the energy consumption of grinding. Cement produced with grinding aids has a lower tendency to compact and agglomerate, which fac...
Claims
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Application Information
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