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Method and system for preparing nitrogen-vanadium alloy

A nitrogen-vanadium alloy and nitrogen synthesis technology, which is applied in the system field of preparing nitrogen-vanadium alloy, can solve the problems of low yield, expensive, unstable, etc., and achieve the effects of low impurity content, low production cost, and easy operation

Pending Publication Date: 2016-11-23
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Nitrogen-increasing methods in steel usually include: (1) adding nitrogen-rich ferromanganese; (2) adding calcium cyanamide; (3) blowing nitrogen, but these methods have disadvantages: method (1) is expensive; method (2) ) yield is low and unstable; method (3) needs special device when blowing nitrogen

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  • Method and system for preparing nitrogen-vanadium alloy
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  • Method and system for preparing nitrogen-vanadium alloy

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Embodiment 1

[0065] Utilize the method for the embodiment of the present invention to prepare nitrogen vanadium alloy, concrete method is as follows:

[0066] (1) Put V 2 o 3 1. Graphite powder and water are mixed according to the mass ratio of 100:45:8 for pelletizing to obtain mixed pellets;

[0067] (2) drying the mixed pellets to obtain dried pellets;

[0068] (3) Put the dried pellets into the rotary hearth furnace. The temperature of the carbonization reaction zone of the rotary hearth furnace is set at 1210°C±10°C, the reaction time is 0.8h, and the temperature of the nitriding reaction zone is set at 1300±10°C. The reaction time is 1 hour, the nitriding reaction is finished, the vanadium-nitrogen alloy enters the cooling zone, is cooled to below 200° C., and is released from the furnace to obtain a nitrogen-vanadium alloy product. The obtained nitrogen-vanadium alloy product has a nitrogen content of 13% and a vanadium content of 73%.

Embodiment 2

[0070] Utilize the method for the embodiment of the present invention to prepare nitrogen vanadium alloy, concrete method is as follows:

[0071] (1) Put V 2 o 3 1. Graphite powder and water are mixed according to the mass ratio of 100:50:10 for pelletizing to obtain mixed pellets;

[0072] (2) drying the mixed pellets to obtain dried pellets;

[0073] (3) Put the dried pellets into the rotary hearth furnace. The temperature of the carbonization reaction zone of the rotary hearth furnace is set at 1210°C±10°C, the reaction time is 1h, and the temperature of the nitriding reaction zone is set at 1350±10°C. After 1.5 hours, the nitriding reaction ends, the vanadium-nitrogen alloy enters the cooling zone, and is cooled to below 200° C. to be released from the furnace to obtain a nitrogen-vanadium alloy product. The obtained nitrogen-vanadium alloy product has a nitrogen content of 14.5% and a vanadium content of 76%.

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Abstract

The invention discloses a method and a system for preparing a nitrogen-vanadium alloy. Wherein, the method for preparing the nitrogen-vanadium alloy includes: molding the vanadium trioxide powder and the graphite powder to obtain the mixed material agglomerate; transporting the mixed material agglomerate to the feeding area of ​​the rotary hearth furnace for distribution, the The agglomerates of the mixed material pass through the carbonization reduction zone, the nitriding synthesis zone and the cooling zone in sequence, and then are discharged through the discharge zone, wherein the agglomerates of the mixed material enter the carbonization reduction zone for carbonization and reduction treatment to obtain vanadium carbide and carbon monoxide; The vanadium carbide enters the nitriding synthesis zone and undergoes nitriding treatment with nitrogen to obtain a nitrogen-vanadium alloy; the nitrogen-vanadium alloy enters the cooling zone for cooling treatment to obtain a cooled nitrogen-vanadium alloy. The method uses vanadium trioxide and graphite as raw materials to prepare mixed material agglomerates, and carries out carbonization reduction treatment and nitriding treatment step by step in a rotary hearth furnace to obtain a vanadium nitrogen alloy with high nitrogen content and low impurity content.

Description

technical field [0001] The invention relates to a method for preparing nitrogen vanadium alloy and a system for preparing nitrogen vanadium alloy. Background technique [0002] Ferrovanadium nitride is a new type of vanadium-nitrogen alloy additive. Its performance is superior to that of ferrovanadium and vanadium nitride. steel, angle steel), thin slab continuous casting and rolling high-strength steel strip, non-quenched and tempered steel, high-speed tool steel and other products. Ferrovanadium nitride can reach 5.0g / cm2 because of its specific gravity 3 Above, it has a higher absorption rate than adding vanadium nitride (the specific gravity is about 3.5), and the recovery rate of ferrovanadium nitride can reach more than 95%, which is 3% to 5% higher than the absorption rate of vanadium nitrogen alloy on average, and the performance is more stable. It has higher grain refinement and improved strength, toughness, ductility, etc. [0003] Nitrogen-increasing methods in...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C27/02C22B34/22
CPCC22C1/1036C22B34/22C22C27/025
Inventor 吴佩佩王健月王福佳曹志成薛逊吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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