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Low-dosage cement chromium-removing grinding aid and preparation method thereof

A technology of grinding aids and cement, which is applied in the field of low-volume cement chromium removal grinding aids and its preparation, can solve the problems of inability to compound grinding aids, high use costs, and inconvenient promotion, and achieve low production costs, Improved physical properties and good stability

Active Publication Date: 2019-12-13
安徽海螺材料科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method commonly used at present to eliminate hexavalent chromium is to use a reducing agent to reduce the toxic hexavalent chromium to non-toxic trivalent chromium. Alcoholamines have poor compatibility and are used in large amounts. Generally, they cannot be used in combination with traditional grinding aids, and most of them are used as powder products. The use cost is high and it is inconvenient to promote.

Method used

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  • Low-dosage cement chromium-removing grinding aid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A low-volume cement chromium removal grinding aid is specifically prepared from the following raw materials in parts by weight: 20 parts of triethanolamine, 20 parts of ethylene glycol, 25 parts of antimony trichloride, and 5 parts of ethanol.

[0025] Described triethanolamine is the industrial product of content 85%;

[0026] Described ethylene glycol is the industrial product of content 95%.

[0027] The antimony trichloride is 99.5% of industrial product.

[0028] The ethanol is industrial ethanol with a content of 95%.

[0029] A preparation method of a low-volume cement chromium removal grinding aid:

[0030] (1) Dissolving certain parts by weight of antimony trichloride in ethylene glycol to form a solution;

[0031] (2) Add triethanolamine to the above solution, and pass cooling water into the reaction kettle. After the dropwise addition is complete and the temperature of the system is stable after the reaction is complete, the temperature is raised to 60° C...

Embodiment 2

[0034] A low-volume cement chromium removal grinding aid is specifically prepared from the following raw materials in parts by weight: 30 parts of diethanol monoisopropanolamine, 30 parts of ethylene glycol, 35 parts of antimony trichloride, and 10 parts of ethanol.

[0035] Described diethanol monoisopropanolamine is a content 85% industrial product:

[0036] Described ethylene glycol is the industrial product of content 95%.

[0037] The antimony trichloride is 99.5% of industrial product.

[0038] The ethanol is industrial ethanol with a content of 95%.

[0039] A preparation method of a low-volume cement chromium removal grinding aid:

[0040] (1) Dissolving certain parts by weight of antimony trichloride in ethylene glycol to form a solution;

[0041] (2) Add diethanol monoisopropanolamine to the above solution, and pass cooling water into the reaction kettle. After the dropwise addition is complete and the temperature of the system is stable after the reaction is com...

Embodiment 3

[0044] A low-volume cement chromium removal grinding aid is specifically prepared from the following raw materials in parts by weight: 40 parts of diethanol monoisopropanolamine, 20 parts of ethylene glycol, 40 parts of antimony trichloride, and 15 parts of ethanol.

[0045] Described diethanol monoisopropanolamine is a content 85% industrial product:

[0046] Described ethylene glycol is the industrial product of content 95%.

[0047] The antimony trichloride is 99.5% of industrial product.

[0048] The ethanol is industrial ethanol with a content of 95%.

[0049] A preparation method of a low-volume cement chromium removal grinding aid:

[0050] (1) Dissolving certain parts by weight of antimony trichloride in ethylene glycol to form a solution;

[0051] (2) Add alcohol amine substances to the above solution, and pass cooling water into the reaction kettle. After the dropwise addition is complete and the temperature of the system is stable after the reaction is complete,...

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Abstract

The invention discloses a low-dosage cement chromium removal grinding aid and a preparation method thereof, and belongs to the technical field of cement admixtures. The cement chromium removal grinding aid is prepared from the following raw materials in parts by weight: 20-40 parts of alcohol amine substances, 20-40 parts of alcohol substances, 25-40 parts of antimony trichloride and 5-15 parts ofethanol. The antimony trichloride is used as a hexavalent chromium reducing agent and can be well compatible with main raw materials, namely the alcohol amine and alcohol substances, of the grindingaid, and the grinding aid and the hexavalent chromium reducing agent are compounded for use. According to the invention, the antimony trichloride and the alcohol amine substances are ingeniously utilized to form an acid-base complex; according to the present invention, the reduction effect of Sb < 3 + > on Cr < 6 + > is retained, and the formed acid-base complex has good stability compared to theantimony trichloride, and the low-dosage cement chromium removal grinding aid has characteristics of low doping amount, low production cost, convenient use, chromium removing effect and grinding aid effect, and has good promotion and application value.

Description

technical field [0001] The invention belongs to the technical field of cement admixtures, in particular to a low-volume cement chromium removal grinding aid and a preparation method thereof. Background technique [0002] Cement grinding is the most important link in the cement production process, and the power consumption in the grinding process accounts for about 60%-70% of the total energy consumption of cement production, of which the power consumption of cement product grinding accounts for 30% of the total power consumption -40%. The grinding process of cement is a process in which cement material particles change from large to small. It is also an energy conversion process that converts electrical energy into mechanical energy and then into surface energy of cement powder. The energy conversion efficiency determines the utilization rate of energy and improves the grinding process. The conversion efficiency of energy in the process can improve the utilization rate of e...

Claims

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Application Information

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IPC IPC(8): C04B7/60C04B7/52
CPCC04B7/52C04B7/60
Inventor 李耀陈烽张辉宋南京司宏振吕晓秦尤敏冯恩娟王志强刘秀敏张晓莺
Owner 安徽海螺材料科技股份有限公司
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