Granular neutral cement grinding aid and its prepn process

Abstract

The present invention discloses one kind of granular neutral cement grinding aid and its preparation process. The grinding aid is produced with anhydrous sodium sulfate 40-50 wt%, gypsum dehydrate 10-20 wt%, elite calx 25-45 wt% and triehtanolamine 1-5 wt%. The grinding aid can activate the effective components in cement to raise the strength of cement, save cement clinker and reduce pollutant gas exhaust. The granular grinding aid has less stickness to bin.

Description

technical field [0001] The invention relates to a granular cement grinding aid and a corresponding preparation process. Background technique [0002] In the process of manufacturing cement, when the clinker, additional materials and gypsum mixture of cement are added to the mill, during the grinding process, due to the violent, frequent and complex friction and impact between materials, between materials and grinding bodies , make the material generate static electricity, and the charged material will be adsorbed on the surface of the steel ball and the grinding body, resulting in serious ball wrapping and forging in the cement mill; when the humidity of the added additional material is higher than 5%, it will be A large amount of water vapor is generated in the mill, which increases the humidity of the grinding material, and also produces the above-mentioned phenomenon of balling and forging, which greatly reduces the output and quality of cement. [0003] In order to solv...

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Problems solved by technology

[0002] In the process of making cement, when the cement clinker, additional materials and gypsum mixture are added to the mill, during the grinding process, due to the intense, frequent and complicated friction and impact between materials, materials and grinding bodies , so that the material generates static electricity, and the charged material will be adsorbed on the surface of the steel ball and the grinding body, causing serious ball wrapping and forging phenomenon in the cement mill; when the humidity of the added additional material is higher than 5%, it will A large amount of water vapor is generated in the mill, which increases the humidity of the grinding material, and also causes the above-mentioned phenomenon of ball encapsulation and encapsulation, which greatly reduces the output and quality of cement.

[0003] In order to solve the problem of static electricity generated during the grinding process of cement mills, some use external electricity to eliminate static electricity, but the effect is not very good; some also use cement grinding aids, but the existing grinding aids are single in variety, expensive in price and unstable in quality