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

A cement grinding aid, low-cost technology, applied in the preparation of cement grinding aid, low-cost cement grinding aid, high-efficiency field, can solve the problem of affecting the service life of buildings, affecting the quality of land water quality, and the improvement effect is not obvious and other problems, to achieve the effect of inhibiting agglomeration, solving processing problems, and reducing production costs

Inactive Publication Date: 2018-08-24
QUANZHOU CHAOXU NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

Experimental program
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Effect test

preparation example Construction

[0031] The preparation method of above-mentioned efficient and low-cost cement grinding aid comprises the steps:

[0032] (a) Get the waste paper pulp wastewater produced by the paper mill, remove chloride ions therein by ion exchange resin, then measure the pH value, add a pH regulator to pH=7, and finally adjust its Baume degree to be 16~20°Bé;

[0033] (b) Accurately weigh each substance for subsequent use according to the amount of each substance in the above-mentioned high-efficiency and low-cost cement grinding aid;

[0034] (c) Add triethanolamine and polyether polyol to an appropriate amount of distilled water, stir evenly with magnetic force while raising the temperature to 40-50°C, then add sodium thiosulfate to dissolve evenly, finally add molasses, stir evenly and maintain at 40°C 50°C for use;

[0035] (d) Add anhydrous sodium acetate and polyhydroxy carboxylic acid to the remaining distilled water, add air-entraining agent after stirring, stir evenly, finally ad...

Embodiment 1

[0039] The pulp wastewater from the paper mill was determined to be alkaline, and its main components were lignin derivatives, organic salts, sodium sulfide, sodium hydroxide, hypochlorite, etc. First, the pulp wastewater is treated with 732 cation exchange resin to remove chloride ions, and then according to its pH value, acetic acid is added dropwise in a titration method until pH = 7, and distilled water is added to the titrated pulp wastewater to adjust its Baume degree to 16. °Bé;

[0040] Weigh 6kg of triethanolamine, 3kg of molasses, 5kg of polyether polyol, 30kg of treated pulp wastewater, 7kg of sodium thiosulfate, 3kg of anhydrous sodium acetate, 4kg of sodium lignosulfonate, 6kg of citric acid, and 36L of distilled water;

[0041] Take 10L of water, add the weighed triethanolamine and polyether polyol into it, heat up to 40°C while magnetically stirring evenly, then add sodium thiosulfate to dissolve evenly, finally add molasses, stir evenly and maintain at 40°C unt...

Embodiment 2

[0045] The operation is the same as in Example 1, wherein the difference is: take by weighing 8kg of triethanolamine, 5kg of molasses, 7kg of polyether polyol, 24kg of treated pulp wastewater, 10kg of sodium thiosulfate, 2kg of anhydrous sodium acetate, 2kg of triterpene saponins, Citric acid 4kg, distilled water 38L.

[0046] According to the preparation method of Example 1, cement grinding aid S2 was obtained.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B103/52
CPCC04B40/0039C04B2103/52C04B24/122C04B24/38C04B24/32C04B22/002C04B22/14C04B24/04C04B2103/304C04B24/06
Inventor 罗贤辉
Owner QUANZHOU CHAOXU NEW ENERGY TECH CO LTD
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