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Method for preparing vanadium pentoxide

A technology of vanadium pentoxide and vanadium slag, applied in the field of metallurgy, can solve the problems of low efficiency, safety and sanitation and environmental pollution, and cannot meet the requirements of environmental protection, etc., and achieve the effect of improving preparation efficiency, improving production efficiency, and facilitating subsequent processing

Active Publication Date: 2011-10-19
CHINA ENFI ENGINEERING CORPORATION
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Problems solved by technology

The current method of producing vanadium pentoxide generally has the problems of long process, high energy consumption, low efficiency and serious safety, sanitation and environmental pollution.
As the country's environmental protection requirements become more and more stringent, the traditional preparation method of vanadium pentoxide can no longer meet the requirements of environmental protection

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  • Method for preparing vanadium pentoxide
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  • Method for preparing vanadium pentoxide

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preparation example Construction

[0039] Preparation of fine vanadium slag

[0040] refer to figure 1 , according to an embodiment of the present invention, the method for preparing fine vanadium slag from raw material vanadium slag comprises the following steps:

[0041] like figure 1 As shown, first, the raw vanadium slag is crushed, and then iron is magnetically separated to obtain iron slag and vanadium slag after iron selection. According to the embodiment of the present invention, the raw vanadium slag used in the present invention is not particularly limited, and may be any material containing vanadium. According to a specific example of the present invention, the raw vanadium slag is the "slag" of vanadium-titanium magnetite after steelmaking, thus, vanadium can be recovered from waste materials, reducing industrial costs. The applicant found that vanadium-titanium magnetite The calcium content of the "slag" after steelmaking is low (the content of calcium oxide is less than 3.5% by weight), so the ...

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Abstract

The invention provides a method for preparing vanadium pentoxide from leachate containing sodium vanadate. The method comprises the following steps of: providing the leachate containing sodium vanadate; adding ammonium sulfate to the leachate containing sodium vanadate, and adjusting the pH value to 1.5-2, and heating at the temperature of 90-100 DEG C to generate a mixed liquid containing an ammonium poly-vanadate precipitate; filtering and washing the mixed liquid containing the ammonium poly-vanadate precipitate to obtain the ammonium poly-vanadate precipitate and vanadium precipitation mother liquor; and heating for decomposing and oxidizing the ammonium poly-vanadate precipitate at the temperature of 400-500 DEG C to generate vanadium pentoxide. The method for preparing vanadium pentoxide has at least one of the following advantages: high efficiency, low cost, low energy consumption, safety and environmental protection.

Description

technical field [0001] The invention relates to the field of metallurgy. More specifically, the present invention relates to a process for the preparation of vanadium pentoxide. Background technique [0002] Vanadium has many excellent physical and chemical properties, and is widely used in metallurgy, electronics, and chemical industries. About 85% of it is used in smelting ferrovanadium as an alloy additive, mainly in the form of vanadium pentoxide. At present, the raw material for preparing vanadium pentoxide is mainly vanadium slag, and the main methods include sodium roasting, pressurized alkali leaching, calcification roasting acid leaching and calcification roasting lye carbonation leaching and other processes. The current method for producing vanadium pentoxide generally has the problems of long process, high energy consumption, low efficiency and serious safety, sanitation and environmental pollution. As the country's environmental protection requirements become m...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/02
Inventor 甘炤坤杜国山周文龙徐月和吕东
Owner CHINA ENFI ENGINEERING CORPORATION
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