Steel slag grinding aid and preparation method thereof

A grinding aid and steel slag technology, applied in the field of chlorine-free grinding aids, can solve the problems of low utilization rate of steel slag, poor safety, poor activity of steel slag products, etc., and achieves excellent grinding aid effect, improved safety and simple preparation method. Effect

Inactive Publication Date: 2012-02-15
孙贤文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a steel slag grinding aid and its preparation method to solve the problems of low utilization rate of steel slag, poor activity and poor safety of steel slag products

Method used

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  • Steel slag grinding aid and preparation method thereof
  • Steel slag grinding aid and preparation method thereof
  • Steel slag grinding aid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The steel slag grinding aid comprises the following raw material components in parts by mass:

[0015]

[0016] At room temperature of 25°C, according to the above ratio, first dissolve urea and sodium hydroxide in tap water at 40°C, and remove the precipitate after standing for precipitation to obtain a clear solution; then ethylene glycol, 20% polycarboxylic acid, Triethanolamine and glycerin are sequentially added to the above clear solution and stirred evenly.

[0017] The steel slag grinding aid prepared above is 1.66 tons, the steel slag is 830 tons after magnetic separation in Angang, and the steel slag powder is produced by a ball mill with a diameter of 2.2×7.5 meters, and the output is increased by about 30%. The specific area of ​​steel slag powder: 500~600m 2 / kg, the strength increased by 3-5mPa.

[0018] The steel slag powder prepared above is used to produce cement, the strength grade is 32.5 grade cement, the steel slag powder doping amount is 20-30w...

Embodiment 2

[0021] The steel slag grinding aid comprises the following raw material components in parts by mass:

[0022]

[0023] At room temperature of 25°C, according to the above ratio, first dissolve urea and sodium hydroxide in tap water at 40°C, and remove the precipitate after standing for precipitation to obtain a clear solution; then ethylene glycol, 20% polycarboxylic acid, Triethanolamine and glycerin are sequentially added to the above clear solution and stirred evenly.

[0024] The steel slag grinding aid prepared above is 1.66 tons, the steel slag is 830 tons after magnetic separation in Angang, and the steel slag powder is produced by a ball mill with a diameter of 2.2×7.5 meters, and the output is increased by about 30%. The specific area of ​​steel slag powder: 500~600m 2 / kg, the strength increased by 3-5mPa.

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Abstract

The invention discloses a steel slag grinding aid, comprising the following ingredients: 15-16 weight portions of tap water, 16.4-15.4 weight portions of urea, 0.4-0.6 weight portions of sodium hydroxide, 2-4 weight portions of glycol, 28-20 weight portions of 20% polycarboxylic acid, 20-22 weight portions of triethanolamine, and 20-22 weight portions of glycerin. The steel slag grinding aid is prepared by mixing the raw material according to the order, uniformly stirring, wherein, the ambient temperature of the mixing process is no lower than 20 DEG C, and the system temperature of the raw material solution in the mixing process is controlled to 40 DEG C. The preparation method is simple, and the steel slag grinding aid has excellent aid-grinding effect with small dosage and can well activate the activity of the steel slag powder because of no chloride ion included. According to the invention, the yield of the steel slag powder is increased by more than 30 %, and the quality of the steel slag powder meets the national quality standard, thus the steel slag grinding aid is an auxiliary agent with advantages of high efficiency and environmental protection.

Description

technical field [0001] The invention relates to an additive for steel slag grinding, in particular to a chlorine-free grinding aid for stimulating the activity of steel slag. Background technique [0002] At present, my country's steel slag output is about 12-20% of crude steel output. According to statistics, steel mills across the country have stockpiled more than 200 million tons of steel slag, covering an area of ​​more than 10,000 mu, and the annual output of waste slag is increasing by more than 30 million tons. The stacking of a large amount of steel slag not only occupies land, but also causes serious pollution to the surrounding environment of the slag yard. [0003] Steel slag has a similar mineral composition to silicate clinker and is a potentially reactive cementitious material. However, steel slag cement has not been fully utilized due to its low activity, large fluctuations in chemical composition, poor safety, hard texture and difficult to break, and rich m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/26C04B103/52
Inventor 孙贤文
Owner 孙贤文
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