High-grade vanadium-titanium pellet and preparation method of high-grade vanadium-titanium pellet

A high-grade pelletizing technology, applied in the field of steelmaking, can solve the problems of high cost and low smelting performance of vanadium-titanium pellets, and achieve the effect of reducing ironmaking cost and improving smelting performance

Inactive Publication Date: 2021-03-26
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

The cost of the above method is high, and the smelting performance of vanadium-titanium pellets is low

Method used

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  • High-grade vanadium-titanium pellet and preparation method of high-grade vanadium-titanium pellet

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preparation example Construction

[0023]The present application also provides the preparation method of high-quality vanadium titanium balls, including the following steps:

[0024]Mixing high-grade vanadium titanium iron concentrate, steel slag powder, dust removal ash and bentonite to obtain a mixture;

[0025]The mixture was sequentially carried out, dry, preheated, and calcined to give high-grade vanadium balls.

[0026]During the above process, the process of high-quality vanadium titanium iron concentrate, steel slag powder, dust removal ash, and bentonite, the application is not particularly limited, as long as mixing uniform, in the specific embodiment, the cylindrical mixer can be used Mix well.

[0027]After mixing, the mixture was sequentially carborn, dried, preheated, and calcined to give high-grade vanadium balls. In the above process, the ball after the ball after the ball is h.2The content of O is 5 to 10% by weight, and the particle size is 5 to 20 mm. The dried temperature is from 100 to 200 ° C, the time is f...

Embodiment

[0035]Step 1: The mass ratio of vanadium titanium concentrate in the ball mining is controlled at 80 ~ 90% by weight, steel slag powder 5.0.0% by weight, blast furnace dusting ash: 5 ~ 10% by weight, bentonite: 0 ~ 3 wt%, pellets The alkalinity is controlled from 0.6 to 1.2;

[0036]Step 2: Mixing the ball: Mix the above materials into the cylindrical mixer by matching the cylinder mixture, to the garden pots, the particle size is 8 ~ 20mm;

[0037]Step 3: Drying, preheating and calcination: The drying system is a blast drying, drying temperature 180 ° C, drying time 4 min; drying the ball, preheating, preheating temperature 800 ° C, time 12 min; preheating the ball after oxidation The calcination temperature was 1250 ° C, and the calcination time was 20 min.

[0038]According to the above, the following three programs were prepared by the following three programs: Solution 1: 85 wt% vanadium iron concentrate + 8WT% steel slag powder + 6 wt% Dust removal ash + 1 wt% bentonite; Solution 2: 85...

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Abstract

The invention provides a high-grade vanadium-titanium pellet. The high-grade vanadium-titanium pellet is prepared from a high-grade vanadium-titanium-iron concentrate, steel slag powder, fly ash and bentonite. The invention further provides a preparation method of the high-grade vanadium-titanium pellet. According to the high-grade vanadium-titanium pellet, iron and carbon in iron-making fly ash and iron, CaO and V2O5 in steelmaking steel slag are utilized, reasonable utilization of secondary resources is achieved, a positive effect is achieved on reduction of an iron-making production cost, and actual production results show that the vanadium-titanium pellet contains 57%-60% of TFe, 8%-12% of TiO2 and 0.6%-0.9% of V2O5, and a roasted pellet compressive strength reaches 2,000-2,500 N/pellet.

Description

Technical field[0001]The present invention relates to the field of steelmaking techniques, and more particularly to high-serving vanadium pellets and preparation methods thereof.Background technique[0002]With the in-depth of the steel industry, the strength, particle size, chemical composition, and metallurgical characteristics of the raw materials are increasingly strict. Similarly, with the advancement of modern blast furnace steelmaking technology, the pellet mine has the advantages of high iron-containing and high mechanical strength, and has become an indispensable component of smelting furnace.[0003]At present, the preparation process of the ball is generally: the fine powder, binder, and additives are mixed, mix well, and then roll over the potentially in the mushroom, and finally use dry or The firing method causes a series of physicochemical changes in the ball to harde the ball to obtain the ball. Usually the main method of the production of vanadium titanium pellets is th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/24C22B1/02
CPCC22B1/2406C22B1/02
Inventor 付卫国胡鹏郑魁王禹键
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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