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Method for preparing vanadium-nitrogen alloy

A technology of vanadium nitrogen alloy and vanadium oxide, which is applied in the field of designing and using iron powder as a catalyst to prepare vanadium nitrogen alloy, can solve the problems of low production yield and purity, achieve the effect of improving purity, reducing excessive reaction problems, and increasing speed

Inactive Publication Date: 2015-04-22
NANTONG HANRUI IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention proposes a method for preparing vanadium-nitrogen alloy, which uses iron powder as a catalyst and gradually raises the temperature to solve the problem of low production yield and purity in the prior art when vanadium oxide is used as a raw material to prepare vanadium-nitrogen alloy

Method used

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Effect test

Embodiment 1

[0014] Mix vanadium oxide (vanadium pentoxide, vanadium tetroxide, vanadium trioxide or a mixture of the three), graphite powder and iron powder evenly, and the iron powder accounts for 0.3% of the total mass. The above mixture is pressed in a ball press to obtain spherical raw meal. Put the raw material into the sintering furnace. The sintering process of the sintering furnace is as follows: 6 hours from normal temperature to 1300 ℃, and keep at the highest temperature for 4 hours; ensure that the furnace is filled with nitrogen during the sintering process. After the sintering is completed and the furnace cools down naturally, the product is sintered. Wherein, in the finally obtained vanadium-nitrogen alloy, the proportion of vanadium element and nitrogen element is 98.9%, and the content of other elements is relatively small.

Embodiment 2

[0016] Mix vanadium oxide (vanadium pentoxide, vanadium tetroxide, vanadium trioxide or a mixture of the three), graphite powder and iron powder evenly, and the iron powder accounts for 1% of the total mass. The above mixture is pressed in a ball press to obtain spherical raw meal. Put the raw material into the sintering furnace. The sintering process of the sintering furnace is as follows: 6 hours from normal temperature to 1400 ℃, and keep at the highest temperature for 2 hours; ensure that the furnace is filled with nitrogen during the sintering process. After the sintering is completed and the furnace cools down naturally, the product is sintered. Wherein, in the finally obtained vanadium-nitrogen alloy, the proportion of vanadium element and nitrogen element is 98.8%, and the content of other elements is relatively small.

Embodiment 3

[0018] Mix vanadium oxide (vanadium pentoxide, vanadium tetroxide, vanadium trioxide or a mixture of the three), graphite powder and iron powder evenly, and the iron powder accounts for 0.8% of the total mass. The above mixture is pressed in a ball press to obtain spherical raw meal. Put the raw material into the sintering furnace. The sintering process of the sintering furnace is as follows: 6 hours from normal temperature to 1500 ℃, and keep at the highest temperature for 3 hours; ensure that the furnace is filled with nitrogen during the sintering process. After the sintering is completed and the furnace cools down naturally, the product is sintered. Wherein, in the finally obtained vanadium-nitrogen alloy, the proportion of vanadium element and nitrogen element is 99.0%, and the content of other elements is relatively small.

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Abstract

The invention provides a method for preparing vanadium-nitrogen alloy. The method comprises the steps that vanadium oxide, graphite powder and a catalyst are evenly mixed, and the mixed materials are compressed to be spherical or elliptical raw materials; afterwards, the raw materials are placed in a sintering furnace full of nitrogen to be sintered, and the vanadium-nitrogen alloy can be obtained after sintering is completed; the catalyst is iron powder; the sintering process of the sintering furnace is that the temperature is made to rise to 1300-1500 DEG C, which is the highest temperature, within six hours; the vanadium oxide comprises at least one of vanadium pentoxide, vanadium tetraoxide and vanadium trioxide.

Description

technical field [0001] The invention relates to the field of preparation of chemical materials, in particular to a method for preparing a vanadium-nitrogen alloy by using iron powder as a catalyst. Background technique [0002] Vanadium-nitrogen alloy is a new type of steel additive. The current method of producing vanadium-nitrogen alloy is to compress vanadium oxide (vanadium pentoxide, vanadium tetroxide, vanadium trioxide or a mixture of the three) and reducing agent graphite into blocks. The powder metallurgy is placed in a high-temperature nitrogen atmosphere, and the vanadium-nitrogen alloy is formed through reduction and nitriding reactions. Due to the nature of vanadium, the theoretical temperature of its reduction and nitriding reactions must be higher than 1250°C. In production, the temperature is generally above 1600°C for the sake of production efficiency. Excessively high temperatures lead to higher energy consumption and loss of refractory materials. The equi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B5/10C22B34/22
Inventor 葛广凯戴红梅
Owner NANTONG HANRUI IND
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