A kind of vanadium nitrogen alloy and preparation method thereof

A vanadium-nitrogen alloy and raw material preparation technology, which is applied in the field of metallurgy, can solve the problems of not being able to meet production needs and low density of vanadium-nitrogen alloys, and achieve the effects of realizing high-value utilization, increasing the degree of densification, and reducing investment costs

Active Publication Date: 2018-11-30
SICHUAN PAN YAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that the density of vanadium-nitrogen alloy prepared by using low-density vanadium trioxide in the prior art is too low to meet production needs, the purpose of the present invention is to provide a method for preparing high-density vanadium-nitrogen alloy by mixing vanadium oxide raw materials

Method used

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Examples

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preparation example Construction

[0028] The invention provides a kind of preparation method of vanadium nitrogen alloy, comprises the following steps:

[0029] a. Abrasives: Add 8-16 parts of vanadium pentoxide, 50-60 parts of vanadium trioxide, 20-30 parts of flake graphite, 0.8-1.6 parts of iron-based sintering aid, and 0.8-2 parts of liquid phase inducer to -140 mesh or less;

[0030] b. Mixing and forming: dry mix all raw materials for 25-40 minutes first, then add 8 to 12 parts of water, and perform wet mixing for 25-40 minutes. After mixing, press molding to obtain molding balls;

[0031] c. React the pellets obtained in step b in a pusher kiln protected by a nitrogen atmosphere for 6-8 hours, take them out of the furnace at 400-1520°C, and cool to 200-250°C to obtain a vanadium-nitrogen alloy;

[0032] The liquid phase inducer in step a is at least one of vanadium carbide, vanadium nitride or vanadium carbonitride, and the iron-based sintering aid is reduced iron powder, red iron oxide, ferric oxide o...

Embodiment 1

[0044] Example 1 Preparation of vanadium nitrogen alloy with the technical solution of the present invention

[0045] a. Abrasive: 12 parts of vanadium pentoxide (V 2 o 5 ), 52 parts of vanadium trioxide (V 2 o 3 ), 24 parts of graphite flakes, 1.2 parts of iron-based sintering aids (0.6 parts of reduced iron powder, 0.6 parts of ferric oxide) and 0.8 parts of liquid phase inducer VN16 alloy abrasives to below -140 mesh;

[0046] b. Mixing and molding: import all the materials in step a into the mixer for 30 minutes of dry mixing operation, then add 10 parts of tap water, and perform 30 minutes of wet mixing operation on the wet mixing equipment. Ball making operation to make balls with a certain shape and strength, and the quality of each ball is controlled at about 50g;

[0047] c. Calcination of pellets: feed pellets into a double-channel pusher kiln with nitrogen atmosphere, react with nitrogen at 400°C to 1520°C, and cool to obtain a vanadium-nitrogen alloy.

[0048]...

Embodiment 2

[0050] Example 2 Preparation of vanadium nitrogen alloy with the technical solution of the present invention

[0051] a. Abrasive: mix 8 parts of vanadium pentoxide (V 2 o 5 ), 56 parts of vanadium trioxide (V 2 o 3 ), 23.4 parts of flake graphite, 1.0 part of iron-based sintering aid (0.5 part of reduced iron powder, 0.5 part of ferric oxide) and 1.2 parts of liquid phase inducer VN16 alloy abrasive to -140 mesh or less;

[0052] b. Mixing and molding: import all the materials in step a into the mixer for 30 minutes of dry mixing operation, then add 10 parts of tap water, and perform 30 minutes of wet mixing operation on the wet mixing equipment. Ball making operation to make balls with a certain shape and strength, and the quality of each ball is controlled at about 50g;

[0053] c. Calcination of pellets: feed pellets into a double-channel pusher kiln with nitrogen atmosphere, react with nitrogen at 400°C to 1520°C, and cool to obtain a vanadium-nitrogen alloy.

[0054...

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Abstract

The invention belongs to the technical field of metallurgy and particularly relates to vanadium-nitrogen alloy and a preparation method thereof. The problems that vanadium-nitrogen alloy prepared through low-density vanadium trioxide is too low in purity and the like in the prior art are solved. The preparation method of the vanadium-nitrogen alloy comprises the steps of material grinding, material mixing, forming, pellet calcinating and the like. According to the preparation method of the vanadium-nitrogen alloy, raw material composition and proportioning are adjusted; vanadium pentoxide and an iron-based sintering auxiliary are added; the carbon thermal reduction reaction gibbs free energy is reduced through the vanadium pentoxide, and the nitriding deoxidizing process is promoted; the contact wetting angle of liquid Fe3C generated through reaction between the iron-based sintering auxiliary and graphite powder and a carbide is small, and the wetting effect is obvious; liquid phase intensifying sintering is conducted, so that the density of the vanadium-nitrogen alloy is improved; and the preparation method is easy to operate, free of waste and capable of significantly reducing the production cost.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a vanadium nitrogen alloy and a preparation method thereof. Background technique [0002] As an important alloying element, vanadium can play the role of precipitation strengthening and dispersion strengthening in steel, and is widely used in various steels, especially low-alloy high-strength steel. The density of vanadium-nitrogen alloy directly affects the recovery rate of vanadium in the steelmaking process. High-density vanadium-nitrogen alloy can prevent additives from floating on the surface of steel slag, promote contact with molten steel, and increase the recovery rate of vanadium in the steelmaking process. . [0003] The vanadium trioxide produced by the prior art has a relatively low density, ranging from 0.60 to 0.80 g cm -3 between, and the existing vanadium-nitrogen alloy production process requires the density of vanadium trioxide to be no less tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/10
CPCC22C1/10
Inventor 唐红建孙朝晖余彬陈海军甘信德王乖宁杜光超景涵尹丹凤王唐林
Owner SICHUAN PAN YAN TECH
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