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Production process of high-purity vanadium pentoxide for vanadium-nitrogen alloy

A technology of vanadium pentoxide and vanadium nitrogen alloy, applied in the field of vanadium pentoxide purification, can solve the problems of high production cost, high equipment requirements, heavy pollution, etc., and achieve the effects of increasing specific surface area, good purity and simplifying process flow

Pending Publication Date: 2022-03-11
江西林力高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, choosing toxic and highly corrosive chlorine gas as the chlorinating agent will undoubtedly face many problems such as heavy pollution, high energy consumption, high requirements for equipment, and high production costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A production process for high-purity vanadium pentoxide for vanadium-nitrogen alloys, the production process for high-purity vanadium pentoxide for vanadium-nitrogen alloys mainly includes the following preparation steps:

[0030] (1) Two-stage temperature-rising chlorination: at 50°C and under the protection of argon, put industrial-grade vanadium pentoxide with a vanadium content of 96.4 in an oven and bake for 1 hour to obtain a dehydrated vanadium source; at 150°C and 120r / min Under the conditions of stirring and argon protection, add anhydrous sodium chloride of 0.65 times the mass of aluminum chloride to aluminum chloride and stir for 10 minutes, keep it warm for later use, and obtain the chlorinating agent; Vanadium source and chlorinating agent are mixed and rectified at a mass ratio of 1:4.8 for 2.4 hours, heated to 160°C, and after heat preservation and rectification for 0.9 hours, vanadium oxychloride is obtained; during this process, molten aluminum trichlori...

Embodiment 2

[0034] A production process for high-purity vanadium pentoxide for vanadium-nitrogen alloys, the production process for high-purity vanadium pentoxide for vanadium-nitrogen alloys mainly includes the following preparation steps:

[0035] (1) Two-stage heating chlorination: at 75°C and under the protection of argon, put industrial-grade vanadium pentoxide with a vanadium content of 96.5% into an oven and bake for 1.5h to obtain a dehydrated vanadium source; at 155°C and 150r Under the conditions of stirring / min and argon protection, add anhydrous sodium chloride of 0.665 times the quality of aluminum chloride to aluminum chloride and stir for 12.5 min, keep warm for standby, and obtain the chlorinating agent; Mix the dehydrated vanadium source and chlorinating agent in a mass ratio of 1:5 and rectify for 2.5 hours, then raise the temperature to 165°C, and heat-preserve and rectify for 1 hour to obtain vanadium oxychloride;

[0036] (2) Ultrasonic spray ammonium solution: under ...

Embodiment 3

[0039] A production process for high-purity vanadium pentoxide for vanadium-nitrogen alloys, the production process for high-purity vanadium pentoxide for vanadium-nitrogen alloys mainly includes the following preparation steps:

[0040] (1) Two-stage heating chlorination: at 100°C and under the protection of argon, put industrial-grade vanadium pentoxide with a vanadium content of 96.6% into an oven to dry for 2 hours to obtain a dehydrated vanadium source; at 160°C, 180r / Under the condition of stirring for 1 min and under the protection of argon, add anhydrous sodium chloride of 0.68 times the mass of aluminum chloride to the aluminum chloride and stir for 15 min, keep it warm for later use, and obtain the chlorinating agent; The vanadium source and chlorinating agent were mixed and rectified at a mass ratio of 1:5.2 for 2.6 hours, then heated to 170°C, and kept for 1.1 hours to obtain vanadium oxychloride;

[0041] (2) Ultrasonic spray ammonium solution: under the conditio...

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PUM

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Abstract

The invention discloses a production process of high-purity vanadium pentoxide for a vanadium-nitrogen alloy, and relates to the technical field of vanadium pentoxide purification. When the high-purity vanadium pentoxide for producing the vanadium-nitrogen alloy is used, industrial-grade vanadium pentoxide is used as a vanadium source, the chlorinating agent obtained by blending aluminum chloride and sodium chloride is firstly used for carrying out two-stage heating chlorination to obtain vanadium oxytrichloride, and then ultrasonic spraying ammonification is carried out, so that the specific surface area of a precipitate is increased while agglomeration of the precipitate is avoided; meanwhile, tail gas containing ammonia gas is recycled and introduced into ultrasonic spraying ammoniation equipment, so that the production process of the high-purity vanadium pentoxide for the vanadium-nitrogen alloy is more energy-saving and environment-friendly; liquid sodium tetrachloroaluminate generated in the preparation process of vanadium oxytrichloride effectively controls volatilization of aluminum chloride, so that aluminum chloride and a vanadium source are in full contact for chlorination, the yield and purity of vanadium oxytrichloride are improved, and the yield and purity of high-purity vanadium pentoxide are further improved.

Description

technical field [0001] The invention relates to the technical field of vanadium pentoxide purification, in particular to a production process for high-purity vanadium pentoxide used in vanadium-nitrogen alloys. Background technique [0002] Vanadium is an important strategic resource, with many excellent physical and chemical properties, known as the metal "vitamin". Therefore, vanadium is widely used in many fields such as iron and steel, metallurgy and chemical industry. Among many vanadium products, vanadium pentoxide is the most stable and widely used. However, in recent years, industrial-grade vanadium pentoxide is facing the current situation of overproduction, sluggish sales market, and continuously falling prices. However, the preparation of vanadium nitrogen alloy puts forward higher requirements on the purity of vanadium pentoxide, and the added value of high-purity vanadium pentoxide products is higher. At present, the high-purity vanadium pentoxide in the dome...

Claims

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Application Information

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IPC IPC(8): C01G31/02
CPCC01G31/02C01P2006/80Y02P20/10
Inventor 余翰林杨陈波邓见超
Owner 江西林力高新材料有限公司
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