Vanadium nitride preparing method

A technology of vanadium nitride and vanadium chloride, applied in the electrolysis process, electrolysis components, etc., can solve the problems of limited application fields, high content of impurity elements, high production costs, etc., to reduce production costs, lower temperatures, and strong application prospects Effect

Inactive Publication Date: 2014-10-15
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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Problems solved by technology

[0007] The above methods all need to be prepared at high temperature, the production cost is high, and the content of impurity elements in the obtained product is relatively high, especially the carbon content, which greatly limits its application in the field of

Method used

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preparation example Construction

[0016] The preparation method of vanadium nitride of the present invention, mixes vanadium oxide and carbonaceous reductant as anode, and carbon steel bar is as cathode, implements electrolysis in alkali metal / alkaline earth metal chloride molten salt system containing low-valent vanadium chloride, Nitrogen gas is fed under the cathode, and the vanadium metal precipitated at the cathode reacts with the nitrogen gas to form vanadium nitride. The electrolyte and the vanadium nitride are separated to obtain the vanadium nitride product.

[0017] Wherein, the vanadium oxide is at least one of vanadium trioxide and vanadium pentoxide, the carbonaceous reducing agent is graphite, petroleum coke or carbon black, and the carbonaceous reducing agent and vanadium oxide are in a C / O molar ratio of 1 :1 for mixing, that is, by molar ratio, C in the carbonaceous reducing agent:O in the vanadium oxide=1:1. In order to ensure the quality of the anode, the preferred mixing method is as follo...

Embodiment 1

[0028] Weigh 100gV 2 o 5 Powder (V 2 o 5 content 95%), -320 mesh graphite 31.6g (carbon content ≥ 99%), add 3wt% PVA binder and mix, press into a Ф25 material column, dry it in an oven at 120°C for more than 12h, and use it as Anode, carbon steel rod as cathode, NaCl-KCl-VCl at 720°C 2 System (NaCl and KCl molar ratio is 1:1, VCl 2 Concentration is 4.5wt%) to implement electrolysis, electrolysis condition is voltage 2.85V, anode current density is 0.2A / cm 2 , the cathode current density is 0.1A / cm 2 , the nitrogen flow rate is 1.5L / min, after electrolysis for 2 hours, remove the cathode and anode and cool down, take out the vanadium nitride and electrolyte that sink to the bottom of the electrolytic cell, wash and remove the electrolyte, and obtain 60g of the product with a particle size of 45-75μm, refer to According to the analysis method of GB / T20567-2006, the main components are analyzed as follows: V is 78.2%, N is 21.3%, C is 0.002%, P is 0.002%, S is 0.002%, and t...

Embodiment 2

[0030] Weigh 100gV 2 o 3 Powder ((V 2 o 5 content 95%), -320 mesh carbon black 25.3g (carbon content ≥ 90%), add 2wt% PVA binder and mix, press into a material column of Ф25, dry at 120°C in an oven for more than 12h, and use its As the anode, the carbon steel rod as the cathode, at 720°C NaCl-KCl-VCl 2 System (NaCl and KCl molar ratio is 1:1, VCl 2 Concentration is 4.5wt%) to implement electrolysis, electrolysis condition is voltage 2.85V, anode current density is 0.1A / cm 2 , the cathode current density is 0.15A / cm 2 , the nitrogen flow rate is 1.5L / min, after electrolysis for 2 hours, remove the anode and cathode and cool down, take out the vanadium nitride and electrolyte that sink to the bottom of the electrolytic cell, wash with water to remove the electrolyte, and obtain 51g of the product with a particle size of 38-70μm, refer to According to the analysis method of GB / T20567-2006, the main components are as follows: V is 77.9%, N is 20.8%, C is 0.003%, P is 0.004%...

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Abstract

The invention relates to a vanadium nitride preparing method, belongs to the technical field of non-ferrous metal metallurgy and aims at solving the technical problem and providing the vanadium nitride preparing method. The vanadium nitride preparing method comprises the steps of mixing a vanadium oxide and a carbonaceous reducing agent, using a mixture as an anode, using a carbon steel bar as a cathode, performing electrolysis in an alkali metal / alkaline-earth metal chloride molten salt system containing low-valent vanadium chloride, and leading nitrogen under the cathode, wherein vanadium metal precipitated from the cathode is reacted with the nitrogen to generate vanadium nitride. In the preparing method, the vanadium nitride is obtained through an electrolysis method, the nitridation preparation temperature can be effectively reduced, and the production cost can be reduced. In addition, due to the fact that the refining and protective effect of the electrolysis enables the product quality to be good, the contents of oxygen, carbon and other impurity elements are low. Furthermore, the product particle size can be further adjusted by controlling current density and other parameters and is controllable, and the vanadium nitride preparing method is suitable for preparation of a powdery metallurgical addition agent and has wide application prospect.

Description

technical field [0001] The invention relates to a preparation method of vanadium nitride and belongs to the technical field of nonferrous metal smelting. Background technique [0002] Vanadium nitride is a new alloy additive that can replace ferrovanadium for the production of microalloyed steel. The addition of vanadium nitride to steel can improve the comprehensive mechanical properties of steel such as strength, toughness, ductility and thermal fatigue resistance, and make the steel have good weldability. When the same strength is achieved, the addition of vanadium nitride saves 30-40% of the added vanadium, thereby reducing the cost. As the strength of the steel is increased, it can effectively save the amount of steel, that is, save the cost of raw materials and smelting, and receive the double benefits of resource saving and environmental protection. [0003] Vanadium nitride can be made of vanadium pentoxide, carbon powder, activator and other raw materials. Under t...

Claims

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Application Information

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IPC IPC(8): C25B1/00
Inventor 朱福兴穆天柱邓斌何安西程晓哲马尚润陈兵郑权张瑶
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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