Method for producing vanadium trioxide

A technology of vanadium trioxide and vanadium pentoxide, which is applied in the direction of vanadium oxide, etc., can solve the problems of low production efficiency, low filling rate, and low product grade, etc., and achieve the improvement of equipment utilization rate, production efficiency, and reduction time. The effect of shortening

Inactive Publication Date: 2007-09-05
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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Problems solved by technology

The disadvantages of this method are: 1. In the actual large-scale industrial production application, the closed rotary kiln is basically used as the implementation equipment. This method requires that the rotary kiln must be used under dynamic sealing. The dynamic sealing of the rotary kiln is when the kiln body is small. It is relatively easy to solve, but it is difficult to do it when the rotary kiln is large. In fact, the rotary kiln for industrial production of vanadium trioxide at home and abroad has not fundamentally solved the sealing problem, and the production is carried out in a fully ventilated workshop to ensure Safety; 2. The material of the rotary kiln must be able to withstand high temperature

Method used

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  • Method for producing vanadium trioxide

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Embodiment 1

[0029] Embodiment 1: produce vanadium trioxide with the inventive method

[0030] Use the vertical fluidized furnace of the bottom feeding and bottom discharging mode as shown in Figure 1. The diameter of the fluidized furnace tube 1 is 200 mm and the length is 1500 mm. The structure of the furnace tube is two parts, the inner layer and the outer layer. The furnace tube diameter is 100mm. Add 4kg of powder ammonium vanadate charge (filling rate is about 45%) with a particle size range of 0.1mm to 5.0mm into the inner layer from the feed pipe at the lower part of the fluidized furnace tube, and blast furnace gas from the fluidized furnace The lower end of the layer furnace tube is connected, and the gas flow rate is 2.0Nm 3 / h (standard cubic meter per hour), the external heating furnace 2 simultaneously heats the furnace tube of the fluidized furnace to a temperature of 650°C in the furnace tube; The inner layer of the inner layer moves towards the outer layer cooling discha...

Embodiment 2

[0032] Embodiment 2: produce vanadium trioxide with the inventive method

[0033] Use the vertical fluidized furnace of the bottom feeding and bottom discharging mode as shown in Figure 1. The diameter of the fluidized furnace tube 1 is 200 mm and the length is 1500 mm. The structure of the furnace tube is two parts, the inner layer and the outer layer. The furnace tube diameter is 100mm. Add 2 kg of powder ammonium vanadate charge (filling rate is about 20%) with a particle size range of 0.05mm to 10.0mm into the inner layer from the feed pipe at the lower part of the fluidized furnace tube, and blast furnace gas from the fluidized furnace The lower end of the layer furnace tube is connected, and the gas flow rate is 1.3Nm 3 / h (standard cubic meter per hour), the external heating furnace 2 simultaneously heats the furnace tube of the fluidized furnace to a temperature of 650°C in the furnace tube; The inner layer of the inner layer moves toward the outer layer cooling disc...

Embodiment 3

[0035] Embodiment 3: produce vanadium trioxide with the inventive method

[0036] Use the vertical fluidized furnace of the bottom feeding and top discharging mode as shown in Figure 2, the fluidized furnace tube 1 has a diameter of 100mm and a length of 2500mm, and the powdered ammonium vanadate with a particle size range of 0.05mm to 5.0mm Charge 5kg (filling rate is about 50%) from the lower part of the fluidized furnace tube 1, and pass the coke oven gas from the lower part of the fluidized furnace tube, and the gas flow rate is 2.5Nm 3 / h, while the external heating furnace 2 heats the furnace tube of the fluidized furnace until the temperature inside the furnace tube is 630°C. Under the blowing of the gas, the charge will tumbling and flow in the furnace tube of the fluidized furnace, and move toward the upper cooling outlet. The reduction time is maintained for 5 minutes, and the charge is reduced to powdered vanadium trioxide. By cooling the discharge port, the vanad...

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Abstract

A process for preparing V2O3 includes such steps as adding the powdered ammonium vanadate or V2O5 into the furnace pipe of an externally heated fluidized furnace, filling industrial gas in the furnace pipe while heating it to 600-650 deg.C, reducing reaction for 3-9 min, and cooling in the condition of isolating air.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular to a method for producing vanadium trioxide (V 2 o 3 )Methods. Background technique [0002] At present, there are two methods for producing vanadium trioxide in the world: one is the thermal decomposition and cracking method of ammonium vanadate (ammonium metavanadate and ammonium polyvanadate) without adding a reducing agent; the other is the method of adding a reducing agent Direct reduction method, the reducing agent used includes ammonia, hydrogen, carbon monoxide, methane or metal vanadium, calcium, magnesium, carbon, etc. The raw materials used to prepare vanadium trioxide usually include vanadium pentoxide, ammonium metavanadate or ammonium polyvanadate. The pyrolysis cracking method has a high decomposition temperature, and it is difficult to manufacture equipment, so it is difficult to put it into actual production; the direct reduction method of reducing agent is more ...

Claims

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Application Information

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IPC IPC(8): C01G31/02
Inventor 张帆孙朝晖李千文兰光铭付自碧杨小琴王小江
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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