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Simple vanadium nitride production method

A production method and technology of vanadium nitride, applied in the direction of nitrogen-metal/silicon/boron binary compounds, etc., can solve the problems of low nitrogen content in products, low life of furnace lining, poor controllability, etc., and achieve wide source of raw materials, atmosphere The effect of convenient control and high productivity

Inactive Publication Date: 2011-09-07
河北钢辰冶金材料有限公司
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Problems solved by technology

[0010] The disadvantages of the above production method are: complex process, low nitrogen content in the product, low lining life, and poor controllability

Method used

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Embodiment Construction

[0024] A kind of simple and easy production method of vanadium nitride, its process step is: ① make V 2 o 5 Powder and graphite powder are fully mixed on a dry mixer at a weight ratio of 4:1, ②Add 4% polyvinyl alcohol aqueous solution to the above mixed powder at a weight ratio of 100:15, and mix in a wet mixer for 10 minutes , ③Press the wet mixed powder into balls, ④Dry the wet ball of mixed powder, ⑤Put the dried mixed powder into the feeding cart, into the furnace, and seal the furnace door, ⑥Evacuate to -0.02MPa, ⑦ Introduce nitrogen pressure to 0.04MPa, ⑧heat to 800°C and carry out pre-reduction at this temperature for about 5 hours, ⑨then continue to heat up to 1350°C for no less than 6 hours of deep reduction and carbonization, and constantly charge during the process Inject nitrogen with a purity of more than 99.99%, and ⑩ raise the temperature to 1600°C for 6-10 hours of nitriding sintering. The pressure of this process is controlled at 0.02Mpa, and the total time i...

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Abstract

The invention discloses a simple vanadium nitride production method, which comprises the following steps of: (1) fully mixing vanadium pentoxide (V2O5) powder and graphite powder in a weight ratio of 4:1 on a dry mixer; (2) adding 4 percent of polyvinyl alcohol aqueous solution into mixed powder in a weight ratio of 100 to 15, and mixing the polyvinyl alcohol aqueous solution and the mixed powderin a wet mixer for 10 minutes; (3) carrying out ball pressing on the wet-mixed mixed powder; (4) drying wet balls of the mixed powder; (5) loading the dried balls of the mixed powder into a charging vehicle in a layered mode and then into a furnace, and sealing a furnace door; (6) vacuumizing until a pressure is equal to -0.02 megapascal (MPa); (7) introducing nitrogen until the pressure is equalto 0.04 MPa; (8) heating to 800 DEG C, and carrying out pre-reduction for about 5 hours at the temperature; (9) then keeping heating to 1,350 DEG C, continuing deep reduction and carbonization for atleast 6 hours, and continuously introducing the nitrogen with the purity of over 99.99 percent in process; and (10) carrying out nitridation sintering for 6 to 10 hours after the temperature rises to1,600 DEG C, controlling the pressure to 0.02 MPa in the process, cutting off power for cooling, and taking vanadium nitride out of the furnace until the temperature is equal to 150 DEG C.

Description

technical field [0001] The invention relates to a production method of vanadium nitride alloy, in particular to a simple and simple production method of vanadium nitride. Background technique [0002] The traditional preparation method of VN alloy is based on the oxide V of vanadium 2 o 3 , V 2 o 5 and vanadium compound ammonium vanadate (NH 4 VO 3 ), ammonium polyvanadate, etc. as raw materials, using carbonaceous, hydrogen, ammonia, CO, etc. as reducing agents, reducing at high temperature or vacuum, and then nitrogen or ammonia for nitriding. The method of preparing vanadium nitride can be divided into two categories: high-temperature vacuum method and high-temperature non-vacuum method according to the different preparation systems and conditions. In each category, it can be divided into C and V according to the different raw materials used. 2 o 3 , C and V 2 o 5 , NH 4 and VO 3 Process for preparing vanadium nitride for solid reactants. [0003] The United S...

Claims

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Application Information

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IPC IPC(8): C01B21/06
Inventor 王安仁卢世国张来顺
Owner 河北钢辰冶金材料有限公司
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