Efficient vanadium-nitrogen alloy production process

A vanadium-nitrogen alloy and production process technology, applied in the field of additive production in iron and steel metallurgy, can solve the problems of short service life, uneconomical, high maintenance cost, and achieve accelerated mass transfer and heat transfer rate, accelerated adsorption and desorption, and equipment service life. long effect

Inactive Publication Date: 2022-04-22
王兆兵
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Problems solved by technology

[0020] (2) It takes a long time to start and stop the furnace, and the equipment and components are easily damaged
It takes 15 days to start the furnace for drying and commissioning, and 7 days for the shutdown to cool down. It is inconvenient to start and stop the furnace
It takes at least 25 days for the furnace to be shut down for heat preservation to repair the furnace body, and the time for laying the furnace and drying the furnace is at least 25 days.
The reaction is carried out at high temperature, and the sliding wear of the graphite material tank in the kiln is serious; the silicon-molybdenum rod and silicon-carbon rod of the heating device are kept in a high-temperature environment for a long time, and the service life is short
[0021] (3) The product quality needs to be continuously improved. ...

Method used

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  • Efficient vanadium-nitrogen alloy production process
  • Efficient vanadium-nitrogen alloy production process

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Embodiment Construction

[0053] Combine below figure 1 , the present invention is described by example. On the basis of the original experimental device for preparing active aluminum powder by nitrogen atomization method, the experimental device was modified, the atomizer was originally connected to the nitrogen pipe, and now it is connected to the carbon powder pneumatic conveying pipe, and a preheater was added to the pneumatic conveying pipe. Originally connected to the aluminum liquid pipe is now connected to the molten state V 2 o 5 Liquid outlet pipe; increase the connection between the fluidized bed device and the outlet of the atomization chamber, and add a Venturi powder sprayer to connect with the bottom of the fluidized bed device, so that carbon agent powder can be replenished while supplying nitrogen, and a heating carbon electrode is installed on the wall of the atomization chamber , the lower part of the boiling device is also equipped with a heating carbon electrode, and the upper p...

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Abstract

The invention discloses an efficient vanadium-nitrogen alloy production process which comprises the following steps: performing nitrogen atomization mixing primary reduction on carbon agent powder and molten-state V2O5, further performing carbon thermal reduction and nitridation to obtain vanadium-nitrogen alloy powder, cooling, adding iron powder, mixing, pressing and molding, and sintering and nitriding to obtain a vanadium-nitrogen alloy finished product. The method is good in product quality, high and stable in vanadium and nitrogen content, low in production cost, low in energy and material consumption and small in equipment occupied area.

Description

technical field [0001] The invention relates to the field of additive production in iron and steel metallurgy, in particular to the production technology of vanadium nitrogen alloy. Background technique [0002] In the industrialized large-scale production of existing vanadium-nitrogen alloys, the oxides of vanadium are used as raw materials, mainly V 2 o 5 As a raw material, it is obtained by carbothermal reduction nitriding, and the mainstream process of vanadium nitrogen alloy production is shown in the appendix figure 2 . [0003] Carbothermal reduction reaction and nitriding reaction occur in vertical kiln or pusher kiln, and the carbothermal reduction reaction formula is. [0004] V 2 o 5 ( s) + 6C( s) = 2VC( s) + CO 2 ( g) ↑+ 3CO( g) ↑ [0005] Nitriding reaction formula is. [0006] 2VC( s) + N 2 (g) = 2VN(s) + 2C [0007] The general reaction formula for forming vanadium nitrogen alloy is. [0008] V 2 o 5 ( s) + 4C( s) + N 2 (g) = 2VN(s) + CO 2 ( g) ...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C29/16
CPCC22C1/056C22C29/16
Inventor 王兆兵王国宁杨家冬高峰
Owner 王兆兵
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