High-efficiency and low-cost cement grinding aid and preparation method thereof

Abstract

The invention discloses a high-efficiency and low-cost cement grinding aid, which comprises: 6-8 wt% of triethanolamine, 3-5 wt% of molasses, 4-8 wt% of polyether polyol, 22-35 wt% of paper pulp wastewater, 7-10 wt% of sodium thiosulfate, 1.5-3 wt% of anhydrous sodium acetate, 1-6 wt% of an air entraining agent, 3-6 wt% of polyhydroxycarboxylic acid, and the balance of distilled water, wherein theair entraining agent is sodium lignosulfonate or triterpene saponin, the polyhydroxycarboxylic acid is a product obtained by oxidizing polysaccharide, chlorine ions are removed from the paper pulp wastewater through resin exchange treatment, and the paper pulp wastewater has the Baume degree of 16-20 DEG Be and the pH value of 7. According to the present invention, the cement grinding aid uses the paper pulp wastewater as the raw material so as to effectively treat the wastewater of papermaking enterprises and reduce the production cost of the grinding aid; and by adding the polyhydroxycarboxylic acid, the water-cement ratio is reduced, the strength of the cement is increased, and the quality of the cement is ensured.

Description

technical field [0001] The invention relates to an additive in the cement production process, in particular to a high-efficiency and low-cost cement grinding aid; in addition, it also relates to a preparation method of the cement grinding aid. Background technique [0002] Grinding is an important process in the cement production process. It mechanically powders cement clinker, retarder and other regulating materials to a suitable particle size to meet the requirements of cement paste coagulation and hardening. During the grinding process, due to the frequent collision and friction between the material and the grinding body in the ball mill, a large amount of static electricity will be generated, which will lead to electrostatic adsorption between the material and the grinding body, so that the material wraps the grinding body and the inner lining of the mill. The partition board will cause the reduction of grinding efficiency and material blockage, and even affect the norma...

AI Technical Summary

Problems solved by technology

However, the existing liquid cement grinding aids still have the following deficiencies: a large amount of triethanolamine is used in the grinding aid products, resulting in high cost of the grinding aid; the effect of strengthening the cement with a large amount of limestone is not obvious; Harmful ingredients such as chloride ions

[0007] Pulp wastewater is liquid waste produced by papermaking enterprises. If it is discharged into land or water sources without treatment, it will cause eutrophication of water and soil, seriously affect the quality of water and land, cause the death of plants and animals, and threaten human health.

Although the existing methods for treating pulp wastewater can reduce its harm to the environment, the cost of treatment is high, and a large amount of land will be occupied for waste accumulation, requiring a lot of manpower and financial resources for maintenance

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