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A method and device for producing metal vanadium by carbothermal reduction

A metal and carbothermal technology, applied in the field of carbothermal reduction to produce metal vanadium, can solve the problems of high cost, easy oxidation of potassium, and many electrolysis processes, and achieve the effect of saving resources and reducing impurities

Active Publication Date: 2022-04-19
HEBEI IRON AND STEEL
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] The production method of pure vanadium metal is generally to use potassium under high pressure to make V 2 o 5 Obtained by reduction, because potassium is easily oxidized and dangerous; or reduction of V with coke 2 o 5 obtained, but the purity of the obtained metal vanadium is relatively low. At present, the metal vanadium obtained by carbon reduction is generally about 94%; or the vanadium-aluminum alloy is obtained by the aluminothermic reduction method. Crude metal vanadium with a vanadium content of 94-97%, if high-purity metal vanadium is to be obtained, is mostly produced by electronic vertical smelting, but the price of electronic vertical smelting furnace is particularly high, due to the small amount and high cost; or electrolysis. For the production of vanadium metal, the electrolysis process has many procedures, complex processes, and more technical control points

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  • A method and device for producing metal vanadium by carbothermal reduction

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Embodiment 1

[0051] This embodiment provides a method for carbon reduction to produce metal vanadium, the method comprising:

[0052] (1) Mix vanadium pentoxide with a particle size of 40 mesh and graphite with a particle size of 80 mesh according to the molar ratio of carbon and oxygen elements of 1.1:1 and press into balls, and carry out reduction smelting to obtain low-priced vanadium oxide or low-priced Vanadium carbides;

[0053] (2) crushing the low-valent vanadium oxide and / or low-valent vanadium carbide obtained in step (1) to 40 mesh, and detecting the content of carbon element and oxygen element;

[0054] (3) According to the test result of step (2), use graphite to carry out carbon matching to the mol ratio of carbon element and oxygen element is 1:1, after mixing, the mixture is obtained, and the obtained mixture is pressed into balls, and the mixture is Carry out vacuum refining at a vacuum degree of 0.1Pa, the temperature of vacuum refining is 1700°C, the heating rate is 4°C...

Embodiment 2

[0057] This embodiment provides a method for carbon reduction to produce metal vanadium, the method comprising:

[0058] (1) Mix vanadium pentoxide with a particle size of 200 mesh and graphite with a particle size of 300 mesh according to the molar ratio of carbon and oxygen elements of 1.2:1 and press them into balls, and carry out reduction smelting to obtain low-priced vanadium carbides or low-valence vanadium carbides. Vanadium carbides;

[0059] (2) crushing the low-valent vanadium oxide and / or low-valent vanadium carbide obtained in step (1) to 200 mesh, and detecting the content of carbon element and oxygen element;

[0060] (3) according to the test result of step (2), it is 1:1 to mix vanadium pentoxide to the mol ratio of carbon element and oxygen element. The material is vacuum refined at a vacuum degree of 0.1Pa. The temperature of the vacuum refining is 1780°C, the heating rate is 4°C / min, the time is 3h, and the argon flow is cooled to 50°C to obtain a metal va...

Embodiment 3

[0063] This embodiment provides a method for carbon reduction to produce metal vanadium, the method comprising:

[0064] (1) Mix vanadium pentoxide with a particle size of 80 mesh and graphite with a particle size of 120 mesh according to the molar ratio of carbon and oxygen elements of 1.15:1 and press into balls, and carry out reduction smelting to obtain low-priced vanadium oxide or low-priced Vanadium carbides;

[0065] (2) crushing the low-valent vanadium oxide and / or low-valent vanadium carbide obtained in step (1) to 50 mesh, and detecting the content of carbon element and oxygen element;

[0066] (3) according to the test result of step (2), it is 1:1 to mix vanadium pentoxide to the mol ratio of carbon element and oxygen element. The material is vacuum refined at a vacuum degree of 0.1Pa. The temperature of the vacuum refining is 1730°C, the heating rate is 4°C / min, the time is 5h, and the argon flow is cooled to 50°C to obtain a metal vanadium product.

[0067] The...

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Abstract

The present invention provides a method and device for producing metal vanadium by carbon reduction. The method comprises the following steps: (1) mixing vanadium oxide compound and carbon raw material for reduction smelting to obtain low-valent vanadium oxide and / or low-valent vanadium carbonization (2) the low-valent vanadium oxide and / or low-valent vanadium carbide obtained in step (1) are broken, and detect the content of carbon and oxygen elements; (3) formulate according to the test results of step (2) Carbon or vanadium oxy compound is mixed to obtain a mixture, which is vacuum refined and cooled to obtain a metal vanadium product. The method and device can reduce energy consumption, reduce consumption of refractory materials, reduce production cost, have simple technological process, less investment amount, less land occupation, and the purity of the produced pure metal vanadium can reach more than 98%.

Description

technical field [0001] The invention belongs to the technical field of chemical and metallurgical production of vanadium metal, and relates to a method for producing vanadium metal, in particular to a method and a device for producing vanadium metal by carbothermal reduction. Background technique [0002] Vanadium is an important alloying element, mainly used in the steel industry. Vanadium-containing steel has the advantages of high strength, high toughness, and good wear resistance, so it is widely used in industries such as machinery, automobiles, shipbuilding, electronic technology, railways, aviation, bridges, and national defense industries. In addition, vanadium oxides have become chemical One of the best catalysts in the industry, known as chemical bread, so vanadium is also an important strategic metal. Metal vanadium has the characteristics of ductility, hard quality, and non-magnetic properties; it has the ability to resist hydrochloric acid and sulfuric acid, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/22C22B5/10C22B9/04
CPCC22B34/22C22B5/10C22B9/04
Inventor 张苏新李九江李兰杰张娜王海龙吴春亮
Owner HEBEI IRON AND STEEL
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