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System and method for producing vanadium trioxide

A technology of vanadium trioxide and combustion system, applied in vanadium oxide and other directions, can solve the problems of low efficiency, inability to realize large-scale production, high production equipment and process, and achieve increased contact area, reliable heating method, and high production efficiency. Effect

Active Publication Date: 2014-09-17
深圳中科九台资源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a system and method for producing vanadium trioxide, so as to overcome defects such as high cost, low efficiency and inability to realize large-scale production of existing production equipment and processes

Method used

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  • System and method for producing vanadium trioxide
  • System and method for producing vanadium trioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1: With a feed rate of 300kg / h, the vanadium pentoxide powder enters Φ900×3500mm through the feed screw and feed leg as attached figure 1 The fluidized reduction furnace shown. After the coke oven gas is burned, flue gas at 1200°C is formed, and the flue gas enters the fluidized reduction furnace, and the fluidized reduction furnace is heated to 800°C through heat exchange. 160Nm 3 The coke oven gas per hour enters from the air funnel at the bottom of the fluidized reduction furnace, blows up the vanadium pentoxide powder, and reduces it for 5 minutes to obtain vanadium trioxide, then the vanadium trioxide passes through the discharge leg, fluidized The cooler uses nitrogen and cooling water as the cooling medium to cool the vanadium trioxide to 80°C, and then enters the product silo through the discharge screw. The reaction tail gas is combusted and discharged after being dusted by the bag filter, and the vanadium trioxide particles in the tail gas enter the...

Embodiment 2

[0042] Example 2: With a feed rate of 400kg / h, the ammonium vanadate powder enters Φ900×3500mm through the feed screw and the feed leg as attached figure 1 The fluidized reduction furnace shown. The flue gas at 1000°C is formed after the coke oven gas is burned, and the flue gas enters the fluidized reduction furnace, and the fluidized reduction furnace is heated to 700°C through heat exchange. 180Nm 3 The coal gas of the gas generator / h enters from the air hopper at the bottom of the fluidized reduction furnace, blows the ammonium vanadate powder, and reduces it for 10 minutes to obtain vanadium trioxide, and then the vanadium trioxide passes through the discharge leg, fluidized The cooler uses nitrogen and cooling water as the cooling medium to cool the vanadium trioxide to 100°C, and then enters the product silo through the discharge screw. The reaction tail gas is combusted and discharged after being dusted by the bag filter, and the vanadium trioxide particles in the t...

Embodiment 3

[0044] Example 3: With a feed rate of 200kg / h, the ammonium vanadate powder enters Φ900×3500mm through the feed screw and the feed leg as attached figure 1 The fluidized reduction furnace shown. The flue gas at 700°C is formed after the blast furnace gas is burned, and the flue gas enters the fluidized reduction furnace, and the fluidized reduction furnace is heated to 600°C through heat exchange. 90Nm 3 The carbon monoxide gas per hour enters from the air hopper at the bottom of the fluidized reduction furnace, blows up the ammonium vanadate powder, and reduces it for 30 minutes to obtain vanadium trioxide, then the vanadium trioxide passes through the discharge leg and the fluidized cooler At the same time, the vanadium trioxide is cooled to 50°C with nitrogen and cooling water as the cooling medium, and then enters the product silo through the discharge screw. The reaction tail gas is combusted and discharged after being dusted by the bag filter, and the vanadium trioxid...

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Abstract

The invention discloses a system and a method for producing vanadium trioxide, and belongs to the technical field of chemical industry. The system comprises a fluidized reduction furnace, a feeding system, a combustion system, a cooling system, a tail gas treatment system, and a discharging system. A heat exchange member is arranged inside the fluidized reduction furnace, and is in a U shape; the heat exchange member makes flue gas and materials exchange heat in a mode of coupling reverse flow with cross flow; the fluidized gas enters the furnace from a fluidized air inlet and the raw materials enter the furnace from a feed inlet; the fluidized gas moves from bottom to top to suspend the raw materials in the furnace body and drive the raw materials to move upwards and be discharged from a discharge hole, and the reaction tail gas is exhausted from a tail gas outlet; the heat exchange member has the functions of improving the fluidized state and exchanging heat simultaneously; and high-temperature flue gas enters the furnace from a flue gas inlet, and after heat exchange, the high-temperature flue gas is exhausted from a flue gas outlet. The system for producing the vanadium trioxide has the advantages of applicability to mass production of vanadium trioxide, good device tightness, high safety, high reaction efficiency, vanadium recovery rate of over 99.4 percent, and vanadium grade in the vanadium trioxide of 67.9 percent.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a system and method for producing vanadium trioxide. Background technique [0002] Vanadium trioxide is a gray-black, metallic luster crystalline powder with hexagonal crystals of corundum structure. Vanadium trioxide will slowly oxidize into vanadium tetroxide in the air, and vanadium trioxide will burn violently to form vanadium tetroxide when heated. Vanadium trioxide is an important vanadium compound, which has important applications in metallurgy, electronics, chemical industry and other fields. Vanadium trioxide can be used to produce ferrovanadium, and vanadium trioxide can be made into vanadium carbide or vanadium nitride, etc., and can be directly added to molten steel to produce special steel. Vanadium trioxide can also be used to make metal vanadium powder. In addition, vanadium trioxide can also be directly used in the production of electronic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G31/02
Inventor 朱庆山张涛陶玲谢朝晖孙兴宁
Owner 深圳中科九台资源科技有限公司
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