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Method for ensuring shaft furnace device to continuously produce vanadium nitride

A technology of vanadium nitride and vanadium nitride raw material, applied in the direction of nitrogen-metal/silicon/boron binary compound, etc., can solve the problems of sintering and sticking of reaction materials, and achieve the increase of nitriding amount, sufficient reaction, and improvement of nitrogen reduction. effect of

Active Publication Date: 2012-09-26
HEBEI IRON AND STEEL
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  • Description
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for ensuring the continuous production of vanadium nitride by the shaft furnace device, which can not only prevent the overall sintering and bonding of the reaction materials and ensure the smooth production of the shaft furnace, but also can be implemented without changing the original process and equipment, from It fundamentally solves the problem of sintering stickiness of reaction materials in the production process of vanadium nitride

Method used

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  • Method for ensuring shaft furnace device to continuously produce vanadium nitride
  • Method for ensuring shaft furnace device to continuously produce vanadium nitride

Examples

Experimental program
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Effect test

Embodiment 1

[0022] The vanadium nitride raw meal balls are continuously added to the vertical reaction furnace, and the temperature is raised to 1350°C for reaction. The residence time of the materials in the furnace is 4 hours. Pestle and chisel before discharging, the obtained product contains V77.86%, N 6.95%, C3.41%, P0.03%, S0.04%.

Embodiment 2

[0024] Mix vanadium nitride raw material balls and graphite blocks with a particle size of about 100mm at a ratio of 2:1, and then continuously add them to the vertical reaction furnace. Qualified products are obtained through manual sorting. There is no bonding between products and between products and graphite blocks, and the obtained products contain V77.53%, N 13.05%, C5.35%, P0.03%, S0.06%.

Embodiment 3

[0026] Vanadium nitride raw material balls and graphite blocks with a particle size of about 100 mm are mixed evenly at a ratio of 2:1, and then continuously added to the vertical reaction furnace, and the temperature is raised to 1400 °C. Qualified products are obtained through manual sorting. There is no bonding between products and between products and graphite blocks, and the obtained products contain V77.67%, N 14.33%, C3.25%, P0.04%, S0.07%.

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Abstract

The invention relates to a method for ensuring a shaft furnace device to continuously produce vanadium nitride, belonging to the technical field of vanadium nitride alloy production. The technical scheme comprises the following steps: in the process of vanadium nitride production, evenly mixing raw material balls with a high temperature-resistant addition material before the vanadium nitride raw material balls enter into the furnace, wherein the high temperature-resistant addition material is one of graphite block and coke briquette or a mixture of graphite block and coke briquette; after evenly mixing, continuously adding the mixture into the shaft furnace device from the top of the furnace body for heating and reacting; and operating the raw material balls and the high temperature-resistant addition material from top to bottom, operating nitrogen from bottom to top, discharging waste gas from the furnace top, discharging the material from the furnace bottom, and separating out a finished vanadium nitride product and the high temperature-resistant addition material. In the invention, the finished vanadium nitride product is packaged, and the high temperature-resistant material (graphite block or coke briquette) is recycled. By using the method, the sintering and adhering problems in the process of vanadium nitride production are solved, continuous and smooth discharging in the production process is ensured, and the content of nitrogen in the vanadium nitride is improved, thus the method has the advantages of low production cost, good economic benefits and environmental benefits and the like.

Description

technical field [0001] The invention relates to a method for ensuring that a shaft furnace device can continuously produce vanadium nitride, and belongs to the technical field of vanadium nitride alloy production. Background technique [0002] Nitrogen is a very beneficial alloying element in vanadium-containing microalloyed steels. Adding nitrogen in steel can strengthen the precipitation of vanadium, change the interphase distribution of vanadium, improve the durable strength of steel, improve the toughness and plasticity of steel, and also improve the thermal strength and short-term creep resistance. For every 10 ppm of nitrogen added in vanadium steel, the strength of the steel increases by 6 MPat. Studies have shown that adding vanadium nitride to steel saves 20%-40% vanadium than adding ferrovanadium, and reduces steelmaking costs by 30-50 yuan / t. This not only saves the expensive and rare metal vanadium, but also utilizes cheap nitrogen resources. At present, the m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B21/06
Inventor 陈东辉李九江栗金刚朱立杰解万里王会娟
Owner HEBEI IRON AND STEEL
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