High-efficiency cement chromium-removing grinding aid

A grinding aid and cement technology, applied in the field of cement admixtures, can solve the problems of unreliable reduction of hexavalent chromium and low removal rate of hexavalent chromium, and achieve the effects of low cost, good use effect and low dosage

Inactive Publication Date: 2020-11-03
南京神仂建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reductant for reducing the content of soluble chromate in cement and its manufacturing method in the above-mentioned patents have the following disadvantages: it cannot guarantee that the hexavalent chromium that enters the cement in the later stage of grinding is also reduced, and the removal rate of hexavalent chromium is relatively low. Low

Method used

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  • High-efficiency cement chromium-removing grinding aid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Efficient cement dechrome grinding aids, such as figure 1 As shown, it includes the following components by weight: 20% of water, 30% of alcohol amine compounds, 49% of extraction powder, 0.4% of reinforcing agent, and 0.6% of reducing agent.

[0033] The alcohol amine compound is triethanolamine, the raw material has a wide application range and low cost.

[0034] The preparation method of described enhancing agent, comprises the steps:

[0035] S21: Take 65% of aluminum slag, 12% of silicon sludge, 13% of carbide slag and 10% of wet fly ash, mix and stir evenly;

[0036] S22: Put the mixture into the billet forming machine to form billets;

[0037] S23: aging the formed product for 24 hours and then drying to remove ethylene glycol to form tricalcium aluminate;

[0038] S24: crush the dried material, send it to a dryer for 30 minutes, and control the drying temperature at 300-350°C;

[0039] S25: Cooling pack.

[0040] The reducing agent is 0.1% of thiourea dioxi...

Embodiment 2

[0050] Efficient cement dechrome grinding aids, such as figure 1 As shown, it includes the following components by weight: 20% of water, 20% of alcohol amine compounds, 59.2% of extraction powder, 0.3% of reinforcing agent, and 0.5% of reducing agent.

[0051] The alcohol amine compound is triethanolamine, the raw material has a wide application range and low cost.

[0052] The preparation method of described enhancing agent, comprises the steps:

[0053] S21: Take 65% of aluminum slag, 12% of silicon sludge, 13% of carbide slag and 10% of wet fly ash, mix and stir evenly;

[0054] S22: Put the mixture into the billet forming machine to form billets;

[0055] S23: aging the formed product for 24 hours and then drying to remove ethylene glycol to form tricalcium aluminate;

[0056] S24: crush the dried material, send it to a dryer for 30 minutes, and control the drying temperature at 300-350°C;

[0057] S25: Cooling pack.

[0058] The reducing agent is 0.1% of thiourea dio...

Embodiment 3

[0067] Efficient cement dechrome grinding aids, such as figure 1 As shown, it includes the following components by weight: 15% of water, 25% of alcohol amine compounds, 59.1% of extraction powder, 0.5% of reinforcing agent, and 0.4% of reducing agent.

[0068] The alcohol amine compound is triethanolamine, the raw material has a wide application range and low cost.

[0069] The preparation method of described enhancing agent, comprises the steps:

[0070] S21: Take 65% of aluminum slag, 12% of silicon sludge, 13% of carbide slag and 10% of wet fly ash, mix and stir evenly;

[0071] S22: Put the mixture into the billet forming machine to form billets;

[0072] S23: aging the formed product for 24 hours and then drying to remove ethylene glycol to form tricalcium aluminate;

[0073] S24: crush the dried material, send it to a dryer for 30 minutes, and control the drying temperature at 300-350°C;

[0074] S25: Cooling pack.

[0075] The reducing agent is 0.1% of thiourea dio...

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Abstract

The invention discloses an efficient cement chromium removal grinding aid, and relates to the technical field of cement admixtures. The problem that the removal rate of hexavalent chromium is low is solved. The additive specifically comprises the following components in percentage by weight: 20% of water, 30% of alcohol amine compounds, 49% of yield increasing powder, 0.4% of a reinforcing agent and 0.6% of a reducing agent. The alcohol amine compound is triethanolamine; the preparation method of the reinforcing agent comprises the following steps: taking 65% of the aluminum slag, 12% of the silicon sludge, 13% of the carbide slag and 10% of the wet discharged fly ash, uniformly mixing and stirring the components, putting the mixture into a blank forming machine to form a blank, aging theblank-formed product for 24 hours, and drying the product. The efficient reducing agent is added into the formula of the grinding aid, so that the hexavalent chromium ions in cement can be effectivelyreduced into trivalent chromium ions, the hexavalent chromium ions are radioactive, the trivalent chromium ions are stable and harmless; multiple reducing agents are used at the same time, so that itis guaranteed that the mixing amount is low, the using effect is good, preparation is easy and efficient, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of cement admixtures, in particular to a high-efficiency cement dechrome grinding aid. Background technique [0002] The cement production process includes: crushing and pre-homogenization - raw meal preparation - raw meal homogenization - preheating decomposition - clinker firing - grinding, cement grinding is the most important link in the cement production process, grinding aids It can prevent cracks from closing through adsorption during the grinding process to promote crack expansion, reduce grinding power consumption during the grinding process, improve the efficiency of the powder separator through dispersion during the powder selection process, and prevent qualified fine powder from returning to the powder. In the grinding cycle, so as to achieve the effect of energy saving and consumption reduction, hexavalent chromium will be produced in the cement raw materials and in the production process and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/16C04B22/08C04B103/52
CPCC04B7/60C04B22/0093C04B40/0039C04B2103/52C04B24/122C04B24/16C04B2103/0096C04B2103/0068
Inventor 曾国斌
Owner 南京神仂建材科技有限公司
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