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Preparation method of iron vanadium nitride

A technology for nitriding vanadium iron and vanadium compounds, applied in the field of vanadium metallurgy, can solve the problems of high impurity content, pollution, irregular products, etc., and achieve the effects of simple process flow, high recovery rate, saving production energy consumption and manpower and material resources.

Inactive Publication Date: 2013-03-20
ANYANG YUQIANXIN METALLURGY REFRACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is that ferrovanadium is obtained by smelting vanadium oxide compound and reducing agent slagging agent. The yield of vanadium after refining is generally 90%-95%. Spreading production to produce ferrovanadium nitride, the production process determines the high content of impurities in the product, burning and heating with fuel during the production process, which is easy to cause pollution, and the obtained product is irregular and needs to be crushed

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0019] A preparation method for ferrovanadium nitride, which comprises the following steps:

[0020] A: Mix ammonium metavanadate, carbonaceous powder, and reduced iron powder uniformly in a molar ratio of 1:4.5:2;

[0021] B: The material obtained in step A is placed in a rotary kiln under a nitrogen protective atmosphere, and the furnace is heated by electric heating at a high temperature of 1300 ° C for 10 hours;

[0022] C: The product obtained in step B is removed and cooled, and ferrovanadium nitride product is obtained when the temperature is less than 120°C.

Embodiment 2

[0024] A preparation method for ferrovanadium nitride, which comprises the following steps:

[0025] A: Mix ammonium polyvanadate, graphite powder, and reduced iron powder uniformly in a molar ratio of 1:4.5:1.5;

[0026] B: The material obtained in step A is placed in a roller kiln under a nitrogen protective atmosphere, and the furnace is heated by electric heating at a high temperature of 1400 ° C for 9 hours;

[0027] C: The product obtained in step B is removed and cooled, and ferrovanadium nitride product is obtained when the temperature is less than 120°C.

Embodiment 3

[0029] A preparation method for ferrovanadium nitride, which comprises the following steps:

[0030] A: Evenly mix vanadium pentoxide, carbon black, and reduced iron powder in a molar ratio of 1:4.5:1;

[0031] B: The material obtained in step A is placed in a tunnel kiln under a nitrogen protective atmosphere, and the furnace is heated by electric heating at a high temperature of 1500 ° C for 8 hours;

[0032] C: The product obtained in step B is removed and cooled, and ferrovanadium nitride product is obtained when the temperature is less than 120°C.

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Abstract

The invention relates to the technical field of vanadium metallurgy, and especially relates to a method for preparing iron vanadium nitride. The method comprises the steps that: A, a vanadium-containing compound, a solid reducing agent, and reduced iron powder are uniformly mixed and molded; B, the material obtained in the step A is placed in a reactor in a nitrogen protective atmosphere, and is subjected to a reaction for 6-10h under a high temperature of 1300-1600 DEG C; and C, the product obtained by the step B is fetched and cooled, and the iron vanadium nitride product is obtained when a temperature is lower than 120 DEG C. The iron vanadium nitride preparation method provided by the invention is energy-saving and consumption-reducing, and has the advantages of simple and feasible technology, high operability, and low investment. With the method, production capacities of vanadium-nitrogen alloy products can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of vanadium metallurgy, in particular to a method for preparing ferrovanadium nitride. Background technique [0002] Ferrovanadium nitride is a new vanadium element additive product. It is another high-efficiency vanadium element additive after vanadium nitrogen alloy products. Ferrovanadium nitride can greatly improve the strength of steel through grain refinement and precipitation strengthening. Comprehensive characteristics such as strength and improved toughness of steel: steel bars added with ferrovanadium nitride have the characteristics of low cost, stable performance, small strength fluctuation, cold bending, excellent welding performance, and basically no aging. Ferrovanadium nitride is also widely used in thin slab high-strength strip steel, non-quenched and tempered steel, high-strength pipeline steel and other products. Ferrovanadium nitride has certain advantages over vanadium nitrogen alloys. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/00C21C7/076C22B34/22C22C32/00C22C33/06
CPCY02P10/20
Inventor 郭官存张晶晶韩菲郭官云
Owner ANYANG YUQIANXIN METALLURGY REFRACTORY
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