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Preparation method of ferrovanadium nitride

A technology of ferrovanadium nitride and nitrogen, which is applied in the field of metallurgy, can solve the problems of easy mixing of elemental iron and poor quality, and achieve the effects of good working environment, stable quality and simple operation

Active Publication Date: 2020-05-19
PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: easy to mix elemental iron in the ferrovanadium nitride product prepared by the existing method, and defects such as poor quality

Method used

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  • Preparation method of ferrovanadium nitride

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preparation example Construction

[0017] The invention provides a kind of preparation method of ferrovanadium nitride, comprises the following steps:

[0018] a. Grind VFe50 and VFe80 and mix them evenly;

[0019] b. Transfer the prepared materials into a graphite crucible, the thickness of the cloth is 20-50mm, and add 30-50g of titanium powder as an ignition agent;

[0020] c. Transfer the graphite crucible to the reaction device, vacuumize after sealing, fill nitrogen to normal pressure, vacuumize again, fill nitrogen again to 7-9MPa, use electronic ignition to ignite the ignition agent, react for 30-45min, and cool to 45~55℃, ferrovanadium nitride can be obtained.

[0021] Wherein, in the above-mentioned preparation method of ferrovanadium nitride, the grinding described in step a is to grind until the particle size exceeds 80 mesh sieves.

[0022] Wherein, in the above-mentioned preparation method of ferrovanadium nitride, the mixing time in step a is 3-8 minutes.

[0023] Wherein, in the above-mention...

Embodiment 1

[0028] Embodiment 1 adopts the inventive method to prepare ferrovanadium nitride

[0029] Taking the production of FeV55N11-A as an example, take 20kg of 80 iron vanadium fine powder ground to -80 mesh, 24kg of 50 iron vanadium fine powder, put them into a mixing tank, and mix them with a mixer for 8 minutes. On the graphite crucible, the thickness of the fabric is 30mm, add 50g of titanium powder as the ignition agent, put it into the nitriding reactor (nitriding reactor requirements: airtight, high temperature resistance, high pressure resistance), vacuumize to remove the air in the airtight container, and then inject Nitrogen to a pressure of 8MPa and maintain a pressure of 7-9MPa, use an electronic igniter to ignite the reaction, the reaction time is 30min, after the reaction is completed, the temperature in the container is cooled to 50°C ± 5°C, stop nitrogen filling, open the nitriding reactor, Take out the product.

Embodiment 2

[0030] Embodiment 2 adopts the inventive method to prepare ferrovanadium nitride

[0031] Taking the production of FeV55N11-A as an example, take 21kg of 80 iron vanadium fine powder ground to -80 mesh, 23kg of 50 iron vanadium fine powder, put them into a mixing tank, and mix them with a mixer for 8 minutes. On the top of the crucible, the thickness of the cloth is 40mm, add 50g of titanium powder as the ignition agent, put it into the nitriding reactor, vacuumize to remove the air in the airtight container, then inject nitrogen to the pressure of 8MPa, use the electronic igniter to ignite the reaction, and the reaction time is 45min , when the temperature is cooled to about 50°C, open the reactor and take it out.

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Abstract

The invention belongs to the technical field of metallurgy, and particularly relates to a preparation method of nitrided ferrovanadium. The defects that zero-valent iron is prone to being mixed in a nitrided ferrovanadium product prepared through an existing method and the quality is poor are overcome. The preparation method of the nitrided ferrovanadium comprises the following steps that a, VFe50and VFe80 are grinded and mixed evenly; b, prepared materials are transferred into a graphite crucible, the material distribution thickness is 20-50 mm, and 30-50 g of titanium powder is added into to serve as an ignition agent; and c, the graphite crucible is transferred into a reaction device, vacuumizing is conducted after sealing, the reaction device is inflated with nitrogen to the normal pressure, vacuumizing is conducted again, the reaction device is inflated with nitrogen again to 7-9 MPa, electronic ignition is used for igniting the ignition agent, the reaction device is cooled to 45-55 DEG C, and the nitrided ferrovanadium is prepared. According to the preparation method of the nitrided ferrovanadium, the 50 ferrovanadium, the 80 ferrovanadium and the clean nitrogen serve as rawmaterials, according to the self-propagating principle, by utilizing a nitrogen pressurized electronic ignition technology in an airtight container, the preparation method has the advantages of simple operation, small labor intensity, good working environment, stable quality of produced products, high yield and the like.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a preparation method of ferrovanadium nitride. Background technique [0002] Ferrovanadium nitride is a steelmaking alloy additive that has been gradually expanded in recent years. It can change the interphase distribution of vanadium, improve the durable strength of steel, improve the toughness and plasticity of steel, and at the same time improve the thermal strength and short-term creep resistance. . Adding ferrovanadium nitride can also reduce the consumption of expensive and rare metal vanadium. [0003] In industrial production, the method for preparing ferrovanadium nitride mainly contains the following two kinds: (1) use vanadium oxide, carbon powder, iron powder as raw material to prepare ferrovanadium nitride; the quality of raw material products of this method is unstable, and the impurity content changes greatly , it is difficult to produce qualified ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/04C22C29/16C22C35/00
CPCC22C1/04C22C29/16C22C35/00
Inventor 任俊王永钢吴封侯海军汤文江赵小平张仲正韦善
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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