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High-chromium type vanadium-titanium magnetic pellets and method for improving quality of high-chromium type vanadium-titanium magnetic pellets

A vanadium-titanium-magnetite concentrate and vanadium-titanium-magnetite technology are applied in the field of metallurgy and can solve the problems of lack of application of pellets entering the furnace, poor quality and metallurgical properties of high-chromium-type vanadium-titanium magnetite pellets, etc.

Inactive Publication Date: 2017-09-29
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] High-chromium vanadium-titanium magnetite concentrate is a kind of vanadium-titanium magnetite with high chromium content. In the prior art, the quality and metallurgical properties of high-chromium vanadium-titanium magnetite pellets prepared by production are poor, especially The application of furnace pellets for extra large blast furnaces is relatively lacking

Method used

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  • High-chromium type vanadium-titanium magnetic pellets and method for improving quality of high-chromium type vanadium-titanium magnetic pellets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Present embodiment provides a kind of method that improves high-chromium type vanadium-titanium magnetite pellet quality and comprises:

[0048] Mixing high-chromium vanadium-titanium magnetite concentrate and bentonite with a moisture mass percentage of 6-7% and bentonite according to the ratio of 98.4:1.5 to obtain a mixture;

[0049] Among them, the main components of high-chromium vanadium-titanium magnetite concentrate are calculated by mass percentage:

[0050] Cr 2 o 3 : 0.8%, TFe: 50%, Ti: 11%, V: 0.5%.

[0051] The mixture is pelletized, and the moisture mass percentage content of the green pellets after pelletizing is 9%;

[0052] Among them, pelletizing is carried out in a disk pelletizing machine, the rotating speed of the pelletizing machine is controlled at 6r / min, and the inclination angle of the pelletizing machine is controlled at 48.5°.

[0053] The raw balls are sieved and roasted successively to obtain cooked balls. After the green balls are scr...

Embodiment 2

[0057] The present embodiment provides a kind of method that improves high chromium type vanadium-titanium magnetite pellet quality, and the difference of this method and the method that embodiment 1 provides is, comprises:

[0058] Mixing high-chromium vanadium-titanium magnetite concentrate and bentonite with a moisture content of 6.5% in a ratio of 98.4:1.6 to obtain a mixture;

[0059] Among them, the main components of high-chromium vanadium-titanium magnetite concentrate are calculated by mass percentage:

[0060] Cr 2 o 3 : 1.0%, TFe: 52%, Ti: 11.5%, V: 0.55%.

[0061] The mixture is pelletized, and the moisture mass percentage content of the green pellets after pelletizing is 9.5%;

[0062] Among them, pelletizing is carried out in a disk pelletizing machine, the rotating speed of the pelletizing machine is controlled at 7r / min, and the inclination angle of the pelletizing machine is controlled at 50°.

[0063] The raw balls are sieved and roasted successively to o...

Embodiment 3

[0067] The present embodiment provides a kind of method that improves high chromium type vanadium-titanium magnetite pellet quality, and the difference of this method and the method that embodiment 1 provides is, comprises:

[0068] Mixing high-chromium vanadium-titanium magnetite concentrate and bentonite with a moisture content of 7% in a ratio of 98.4:1.7 to obtain a mixture;

[0069] Among them, the main components of high-chromium vanadium-titanium magnetite concentrate are calculated by mass percentage:

[0070] Cr 2 o 3 : 1.1%, TFe: 55%, Ti: 12%, V: 0.6%.

[0071] The mixture is pelletized, and the moisture content of the green pellets after pelletizing is 10%;

[0072] Among them, pelletizing is carried out in a disk pelletizing machine, the rotating speed of the pelletizing machine is controlled at 8r / min, and the inclination angle of the pelletizing machine is controlled at 51.5°.

[0073] The raw balls are sieved and roasted successively to obtain cooked balls. ...

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Abstract

The invention provides high-chromium type vanadium-titanium magnetic pellets and a method for improving the quality of the high-chromium type vanadium-titanium magnetic pellets and relates to the technical field of metallurgy. The high-chromium type vanadium-titanium magnetic pellets are prepared by the following steps that high-chromium type vanadium-titanium magnetic concentrates with the water content being 6%-7% in mass percent and binding agents are mixed and stirred according to the ratio of 98.4: 1.5-1.7, and a mixture is obtained; the mixture is pelletized, and the water content of each pelletized green pellet is made to be 9%-10% in mass percent; and the green pellets are screened and roasted sequentially, then roasted pellets are obtained, and roasting is conducted under the oxidizing atmosphere. The high-chromium type vanadium-titanium magnetic pellets obtained by the method for improving the quality of the high-chromium type vanadium-titanium magnetic pellets are excellent in metallurgical performance and high in quality, the requirement of medium-small blast furnaces for the in-furnace pellets can be met, and the requirement of extra-large blast furnaces for the in-furnace pellets is further met, and the high-chromium type vanadium-titanium magnetic pellets have wide industrial production prospects.

Description

technical field [0001] The invention relates to the technical field of metallurgy, and in particular to a high-chromium vanadium-titanium magnetite pellet and a method for improving the quality of the high-chromium vanadium-titanium magnetite pellet. Background technique [0002] So far, among the global iron ore resources, the proven iron ore with a grade greater than 40% is about 850 billion tons. With the development of the iron and steel industry, the amount of raw materials required for ironmaking will increase, but the rich ore that can be directly fed into the furnace only accounts for about 45% of the proven reserves, and most of them are lean ore with harmful impurities. This kind of ore needs to be finely ground and selected into pellets before it can be smelted in the furnace. [0003] Due to its good metallurgical properties, pellets can meet the requirements of smelting to the greatest extent and greatly strengthen the smelting process. Therefore, industrial pr...

Claims

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Application Information

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IPC IPC(8): C22B1/24
CPCC22B1/2406
Inventor 唐文博
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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