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Method and system for reducing reduction degradation of vanadium-titanium magnet pellets

A technology of vanadium-titanium magnetite and vanadium-titanium magnet, which is applied in the field of metallurgical pellet production of vanadium-titanium magnetite, can solve problems such as failure to take preventive measures, failure to prevent pulverization, and reduction of sinter strength, etc., to achieve improvement Improvement of mechanical and kinetic properties, metallurgical performance indicators, and reduction of pulverization rate

Inactive Publication Date: 2017-05-24
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this process is that it only provides a method of using vanadium-titanium magnetite to produce vanadium-titanium magnetite sintered ore according to the sintering process, but no preventive measures are taken to solve the problem of pulverization during the smelting reduction process
The disadvantage of this process is that the use of pellet technology to process vanadium-titanium magnetite is also a physical treatment of the vanadium-titanium magnetite raw material. The effect occurs in the pellet roasting stage, which improves the grade of the furnace ore. There are no preventive measures for the pulverization of pellets in the reduction stage of smelting
The disadvantage of this process is that the finished sinter is sprayed with aqueous solution, which will increase the internal stress due to high temperature and rapid cooling, which will reduce the strength of the sinter

Method used

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  • Method and system for reducing reduction degradation of vanadium-titanium magnet pellets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Grinding vanadium-titanium magnetite to obtain vanadium-titanium magnetite powder, the ratio of which the particle size is required to be less than 0.074mm is between 60% and 80%;

[0045] (2) mixing the vanadium-titanium-magnetite powder and bentonite to obtain a mixture; the specific proportioning is, vanadium-titanium-magnetite powder 95kg, bentonite 5kg;

[0046] (3) The mixture is made into green balls on a pelletizing machine (disc pelletizing machine), and the green balls are balls with a diameter of 10-18mm; wherein, boric acid aqueous solution is added during the pelletizing process as pelletizing pellets Water, the concentration of boric acid aqueous solution is 0.1% (mass percentage); In the water tank, the boric acid aqueous solution is evenly added to the green balls during the growth process of the green balls. Based on the total mass of vanadium-titanium magnetite and bentonite as 100%, the addition amount of boric acid aqueous solution is 1%.

[00...

Embodiment 2

[0050] (1) Grinding vanadium-titanium magnetite to obtain vanadium-titanium magnetite powder, the ratio of which the particle size is required to be less than 0.074mm is between 60% and 80%;

[0051] (2) mixing the vanadium-titanium-magnetite powder and bentonite to obtain a mixture; the specific proportioning is, vanadium-titanium-magnetite powder 99kg, bentonite 1kg;

[0052] (3) The mixture is made into green balls on a pelletizing machine (cylindrical pelletizing machine), and the green balls are balls with a diameter of 10-18mm; wherein, boric acid aqueous solution is added during the pelletizing process as pelletizing pellets Water, the concentration of boric acid aqueous solution is 0.25% (mass percentage); In the water tank, the boric acid aqueous solution is evenly added to the green balls during the growth process of the green balls. Based on the mass of vanadium-titanium magnetite and bentonite as 100%, the addition amount of boric acid aqueous solution is 2%.

[...

Embodiment 3

[0056] (1) Grinding vanadium-titanium magnetite to obtain vanadium-titanium magnetite powder, the ratio of which the particle size is required to be less than 0.074mm is between 60% and 80%;

[0057] (2) mixing the vanadium-titanium-magnetite powder and bentonite to obtain a compound; the specific proportioning is, vanadium-titanium-magnetite powder 97kg, bentonite 3kg;

[0058] (3) The mixture is made into green balls on a pelletizing machine (cylindrical pelletizing machine), and the green balls are balls with a diameter of 10-18mm; wherein, boric acid aqueous solution is added during the pelletizing process as pelletizing pellets With water, the concentration of boric acid aqueous solution is 0.5% (mass percentage); the addition point of boric acid is the water addition point of the pelletizer, and boric acid and water are first prepared into a boric acid aqueous solution of the required concentration, and then added to the water tank of the pelletizer In the process of gro...

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Abstract

The invention discloses a method and system for reducing reduction degradation of vanadium-titanium magnet pellets. The method for reducing reduction degradation of the vanadium-titanium magnet pellets includes the following steps that firstly, vanadium-titanium magnetite is ground to be fine, and vanadium-titanium magnetite powder is obtained; secondly, the vanadium-titanium magnetite powder is mixed with bentonite, and a mixture is obtained; thirdly, the mixture is pelletized, and green pellets are obtained, wherein a boric acid water solution is added in the pelletizing process to serve as water for pellet pelletizing; and fourthly, the green pellets are roasted, and the vanadium-titanium magnet pellets are obtained. The invention further discloses a system implementing the method, and the system includes a fine grinding device, a material mixing device, a pelletizing device and a roasting device. According to the method and the device, in the pelletizing process, the boric acid water solution is evenly sprayed into the green pellets, the reduction degradation rate of the vanadium-titanium magnet pellets is effectively reduced, and the metallurgical performance in the pellet smelting reduction process is improved.

Description

technical field [0001] The invention relates to a method and a system for reducing reduction pulverization of vanadium-titanium magnetite pellets, belonging to the field of vanadium-titanium magnetite metallurgical pellet production. Background technique [0002] During the smelting and reduction process of vanadium-titanium magnetite pellets, different degrees of pulverization will occur. With the change of smelting conditions, the degree of pulverization varies greatly. The impact of the furnace condition is forward, reducing the smelting efficiency and increasing the smelting cost. Therefore, it is of practical significance for the utilization of vanadium-titanium magnetite resources to find a technology to suppress and reduce pulverization during the reduction process in the pellet production stage. [0003] Chinese Patent Application Publication No. CN 104060083 A discloses a sintering method of vanadium-titanium magnetite. Its main technical features are: according to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/24
CPCC22B1/2406
Inventor 吴道洪曾刚
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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