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A kind of superfine powder admixture of vanadium-titanium slag and its preparation method

A technology of ultra-fine powder and vanadium-titanium slag, which is applied in cement production and other directions, can solve the problems of low hydraulic activity, high comprehensive power consumption, and difficult grinding, etc., to achieve increased hydration reaction activity, improved grinding efficiency, and improved The effect of powder activity

Active Publication Date: 2022-03-15
中建材科创新技术研究院(山东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] A large amount of granulated blast furnace vanadium-titanium slag will be produced in the process of smelting vanadium-titanium magnetite, due to TiO 2 The content is high, the hydraulic activity is low, and it is not easy to grind, so the comprehensive utilization of resources cannot be effectively carried out
[0003] At present, some scholars have used vanadium-titanium slag to be used in cement production and concrete engineering after grinding, and the grinding fineness is 400-500m. 2 / kg or so, it is mostly used in combination with fly ash, steel slag, limestone, etc., or the potential hydraulicity of vanadium-titanium ore powder is stimulated by adding an appropriate amount of activator. As an admixture alone, its activity index can only reach S75 level , the dosage is generally low, which limits its large-scale application in the building materials industry
Due to the presence of refractory phases in the slag, the comprehensive power consumption in the ultrafine powder grinding process is too high. Therefore, it is urgent to provide an efficient method for preparing vanadium-titanium slag ultrafine powder admixtures. Grinding phase, so as to improve the grinding efficiency of powder, so as to realize its efficient resource utilization in cement and concrete

Method used

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  • A kind of superfine powder admixture of vanadium-titanium slag and its preparation method
  • A kind of superfine powder admixture of vanadium-titanium slag and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0021] For the vanadium-titanium slag superfine powder admixture of this embodiment, wash the vanadium-titanium slag with industrial water at 20±1°C for 3 to 4 times until the washing solution is clarified, and dry the material at a temperature of 105°C to 110°C until the moisture content of the material is 2 / kg, the set speed is 10-20r / min, and the grinding time is 120min; after the centrifugal powder classifier sorts the 200-mesh qualified product, it is added to the ultra-fine mill with a speed of 400r / min to continue grinding for 60min. After being sorted by an ultrafine powder separator with a rotating speed of 100-150r / min, the specific surface area of ​​the final ultrafine powder is 710-730m 2 / kg.

Embodiment 2

[0023] For the superfine powder admixture of vanadium-titanium slag in this embodiment, wash the slag with industrial water at 20±1°C for 3 to 4 times until the washing solution is clarified, and dry the material at a temperature of 105°C to 110°C until the moisture content of the material is 2 / kg, the set speed is 10-20r / min, and the grinding time is 150min; after the centrifugal powder classifier sorts the 200-mesh qualified product, it is added to the ultra-fine mill to continue grinding for 90min, and the speed is 400r / min. After being sorted by an ultra-fine powder separator with a speed of 100-150r / min, the specific surface area of ​​the final ultra-fine powder is 780-800m 2 / kg.

Embodiment 3

[0025] For the superfine powder admixture of vanadium-titanium slag in this embodiment, wash the slag with industrial water at 20±1°C for 3 to 4 times until the washing solution is clarified, and dry the material at a temperature of 105°C to 110°C until the moisture content of the material is 2 / kg, the set speed is 10-20r / min, and the grinding time is 180min; after the centrifugal powder classifier sorts the 200-mesh qualified product, it is added to the ultra-fine mill with a speed of 300r / min to continue grinding for 90min. After being sorted by an ultra-fine powder separator with a speed of 100-150r / min, the specific surface area of ​​the final ultra-fine powder is 700-750m 2 / kg, SO 3 Content ≤ 0.50%, chloride ion content ≤ 0.04%.

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Abstract

The invention relates to a vanadium-titanium slag superfine powder admixture and a preparation method thereof. The selected discharge powder has a specific surface area of ​​400-500m 2 / kg; the specific surface area of ​​the re-sorted discharged powder is 700-800m 2 / kg. The invention provides a high-efficiency preparation method of vanadium-titanium slag ultrafine powder admixture, obtains ultrafine powder with high specific surface area, greatly improves the hydration activity of vanadium-titanium slag, contributes more to cement strength, and improves grinding efficiency High, realize its efficient resource utilization in cement and concrete.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a vanadium-titanium slag superfine powder admixture and a preparation method thereof. Background technique [0002] A large amount of granulated blast furnace vanadium-titanium slag will be produced in the process of smelting vanadium-titanium magnetite, due to TiO 2 The content is high, the hydraulic activity is low, and it is not easy to grind, so the comprehensive utilization of resources cannot be effectively carried out. [0003] At present, some scholars have used vanadium-titanium slag to be used in cement production and concrete engineering after grinding, and the grinding fineness is 400-500m. 2 About / kg, most of them are used in combination with fly ash, steel slag, limestone, etc., or the potential hydraulicity of vanadium-titanium ore powder is stimulated by adding an appropriate amount of activator. As an admixture alone, its activity index can only reac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B5/00C04B7/147C04B7/38
CPCC04B5/00C04B7/147C04B7/38Y02P40/10
Inventor 张忠伦王明铭辛志军
Owner 中建材科创新技术研究院(山东)有限公司
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