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A kind of equipment and method for producing powdery vanadium pentoxide

A vanadium pentoxide and equipment technology, which is applied in the field of equipment for producing powdery vanadium pentoxide, can solve the problems of lowering the product grade of vanadium pentoxide, insufficient dehydration and deamination of APV, and easy agglomeration and ring formation of APV. Achieve complete reaction, ensure oxidation atmosphere, and improve taste

Active Publication Date: 2018-02-02
PANGANG GRP PANZHIHUA STEEL & VANADIUM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional rotary kiln, due to the entry of new air, the temperature of the material in the rotary kiln cylinder will be reduced, and because the cylinder wall of the rotary kiln cylinder is under the action of the heating device, the temperature is high, and the cylinder is close to the cylinder along the radial direction of the rotary kiln cylinder. In the center of the cylinder, the temperature is lower than the wall of the cylinder. When the APV enters the discharge end from the feed end of the cylinder, the dehydration and deamination of the APV will be insufficient due to the uneven temperature inside the cylinder, making the APV easy to agglomerate and form rings.
Impurities are prone to appear in the produced vanadium pentoxide products, reducing the grade of vanadium pentoxide products

Method used

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  • A kind of equipment and method for producing powdery vanadium pentoxide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] When the angle between the rotary kiln shell 1 and the horizontal plane is 3°, the ordinary APV: TV: 49.1%, Si: 0.07%, S: 0.17%, Fe: 0.08%, Na 2 O+K 2 O: 0.4%, the production is organized at a feed rate of 50kg / h, the temperature of the hot air blown into the inner cavity of the rotary kiln shell 1 is 200°C, and the flow rate of the hot air is 15m 3 / h, the temperature from 1 to 6 points is 520°C, 560°C, 580°C, 580°C, 590°C, 250°C, the cylinder speed is 40s / r, the cylinder negative pressure is -100pa, and the oxygen volume concentration is 19.8%. The quality of the powdery vanadium pentoxide produced is V 2 o 5 : 99.13%, V 2 o 4 : 0.6%, Si: 0.08%, Fe: 0.09%, Na 2 O+K 2 O: 0.47%, S: 0.06%, P: 0.005%, As: 0.005%.

Embodiment 2

[0051] When the angle between the rotary kiln shell 1 and the horizontal plane is 3°, the ordinary APV: TV: 48.5%, Si: 0.18%, S: 0.26%, Fe: 0.22%, Na 2 O+K 2 O: 0.93%, the production is organized at a feed rate of 70kg / h, the temperature of the hot air blown into the inner cavity of the rotary kiln shell 1 is 200°C, and the flow rate of the hot air is 25m 3 / h, the temperature from 1 to 6 points is 500°C, 590°C, 590°C, 600°C, 590°C, 200°C, the cylinder speed is 55s / r, the cylinder negative pressure is -50pa, and the oxygen volume concentration is 19.5%. The quality of the powdery vanadium pentoxide produced is V 2 o 5 : 98.53%, V 2 o 4: 1.3%, Si: 0.21%, Fe: 0.12%, Na 2 O+K 2 O: 1.07%, S: 0.10%, P: 0.005%, As: 0.005%.

Embodiment 3

[0053] When the angle between the rotary kiln shell 1 and the horizontal plane is 7°, the ordinary APV: TV: 49.5%, Si: 0.04%, S: 0.06%, Fe: 0.03%, Na 2 O+K 2 O: 0.21%, the production is organized at a feed rate of 50kg / h, the temperature of the hot air blown into the inner cavity of the rotary kiln shell 1 is 300°C, and the flow rate of the hot air is 40m 3 / h h, temperature from 1 to 6 points is 550°C, 585°C, 600°C, 600°C, 550°C, 270°C, cylinder speed is 25s / r, cylinder negative pressure is -150pa, oxygen volume concentration is 20.8%, The quality of the powdery vanadium pentoxide produced is V 2 o 5 : 99.62%, V 2 o 4 : 0.2%, Si: 0.05%, Fe: 0.04%, Na 2 O+K 2 O: 0.26%, S: 0.04%, P: 0.005%, As: 0.005%.

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Abstract

The invention relates to equipment for producing powdery vanadium pentoxide, which belongs to the field of metallurgy. The purpose is to provide a kind of equipment specially used in producing vanadium pentoxide by APV. It can fully oxidize APV and improve the grade of vanadium pentoxide. It includes a rotary kiln device and a dust removal system. The rotary kiln device includes a rotary kiln shell, a combustion device, and a transmission device connected to the rotary kiln shell to provide a rotating speed for the rotary kiln shell. The rotary kiln shell is set in the combustion device. One end is The feed end, the other end is the discharge end, the feed end is higher than the discharge end, the dust removal system is set at the feed end of the rotary kiln shell and communicates with the inner cavity of the rotary kiln shell; The air pipe that transports hot air to the inner cavity of the rotary kiln cylinder, and one end of the air pipeline enters the inner cavity of the rotary kiln cylinder from the discharge end. The invention enables the APV to react in constant temperature, negative pressure and oxidizing atmosphere, the reaction is more thorough, and the taste of the vanadium pentoxide product is improved.

Description

technical field [0001] The invention belongs to the field of metallurgy, in particular to a device and method for producing powdery vanadium pentoxide. Background technique [0002] Powdered vanadium pentoxide can be used to prepare products such as vanadium iron, vanadium aluminum, vanadium carbide and vanadium nitride, and can be added to molten steel to improve the mechanical properties of steel. For a long time, powdery vanadium pentoxide has been generally produced by oxidizing and calcining ammonium metavanadate. At present, there is a technology of producing powdery vanadium pentoxide from red vanadium (APV for short) produced by vanadium slag sodium roasting-ammonium salt vanadium precipitation process. Compared with utilizing APV to produce powdery vanadium pentoxide, utilizing ammonium metavanadate to produce powdery vanadium pentoxide mainly has the following problems: [0003] 1. The production of ammonium metavanadate belongs to the precipitation of vanadium b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/22
Inventor 韦林森冉俊李大标侯海军付云贵李千文邓孝伯彭一村穆晓玲
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM
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