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Equipment and method for producing powdery vanadium oxide

A powdery vanadium pentoxide 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, easy agglomeration and ring formation of APV, etc. , to achieve a thorough reaction, ensure an oxidizing atmosphere, and improve the taste

Active Publication Date: 2015-09-09
PANGANG GRP PANZHIHUA STEEL & VANADIUM
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  • Summary
  • 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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  • Equipment and method for producing powdery vanadium oxide

Examples

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, temperature from 1 to 6 points is 520°C, 560°C, 580°C, 580°C, 590°C, 250°C, cylinder speed is 40s / r, cylinder negative pressure is -100pa, 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 rotating speed of the cylinder is 55s / r, the negative pressure of the cylinder 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 discloses equipment for producing powdery vanadium oxide, belongs to the field of metallurgy, and aims to provide special equipment for producing the powdery vanadium oxide from APV. By the aid of the equipment, the APV can be fully oxidized and the grade of the vanadium oxide can be increased. The equipment comprises a rotary kiln device, a dust removal system and an air pipeline, wherein the rotary kiln device comprises a rotary kiln drum, a combustion device and a transmission device, the transmission device is connected with the rotary kiln drum and provides the rotating speed for the rotary kiln drum, the rotary kiln drum is arranged in the combustion device, one end is a feeding end, the other end is a discharging end, and the feeding end is higher than the discharging end; the dust removal system is arranged at the feeding end of the rotary kiln drum and communicated with an inner cavity of the rotary kiln drum; the air pipeline is communicated with the inner cavity of the rotary kiln drum and delivers hot air to the inner cavity of the rotary kiln drum, and one end of the air pipeline enters the inner cavity of the rotary kiln drum from the discharging end. According to the equipment, the APV reacts in a constant-temperature and negative-pressure oxidation atmosphere, the reaction is more thorough, and the grade of the vanadium oxide product is increased.

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 Applications(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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