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A kind of method of ammonium polyvanadate fluidized production powdery vanadium pentoxide

A technology of vanadium pentoxide and ammonium polyvanadate, applied in vanadium oxide, energy input and other directions, can solve the problems of uneven appearance and color, complicated temperature control, large energy consumption, etc. low effect

Inactive Publication Date: 2015-09-16
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"Two-step method" to produce powdered V 2 o 5 Complicated temperature control, prone to agglomeration, high energy consumption, and low heat utilization rate
In addition, the "two-step method" is a static decomposition, and the decomposition of ammonia and hydrogen will convert V 2 o 5 reduction, so that V 2 o 5 Uneven color appearance

Method used

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  • A kind of method of ammonium polyvanadate fluidized production powdery vanadium pentoxide

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] Set the height difference between the feed inlet and the coarse particle outlet to be 1.21m.

[0020] The particle size of the ammonium polyvanadate material is less than 200 mesh. The ammonium polyvanadate material is pre-fluidized by using a U-valve feed system so that the ammonium polyvanadate material is in a fluidized state before entering the fluidized bed. Control the flow rate of compressed air entering the main structure of the fluidized bed from the fluidization gas inlet to 160±10Nm 3 / h, the pressure is 62±2kPa. The temperature in the main structure of the fluidized bed is controlled by the temperature control member to be 520±5°C, the residence time of the ammonium polyvanadate material in the main structure of the fluidized bed is 50±5min, obtained from the outlet of the coarse particle material and the outlet of the fine particle material Powdered vanadium pentoxide. Among the obtained powdery vanadium pentoxide products, products with a particle size ...

example 2

[0022] Set the height difference between the feed inlet and the coarse particle outlet to be 1.24m.

[0023] The particle size of the ammonium polyvanadate material is less than 200 mesh. The ammonium polyvanadate material is pre-fluidized by using a U-valve feed system so that the ammonium polyvanadate material is in a fluidized state before entering the fluidized bed. Control the flow rate of compressed air entering the main structure of the fluidized bed from the fluidization gas inlet to 220±10Nm 3 / h, the pressure is 68±2kPa. The temperature in the main structure of the fluidized bed is controlled by the temperature control component to be 500±5°C, and the residence time of the ammonium polyvanadate material in the main structure of the fluidized bed is 45±5min, obtained from the outlet of the coarse particle material and the outlet of the fine particle material Powdered vanadium pentoxide. Among the obtained powdery vanadium pentoxide products, the products with a par...

example 3

[0025] Set the height difference between the feed inlet and the coarse particle outlet to be 1.30m.

[0026] The particle size of the ammonium polyvanadate material is less than 200 mesh. U-valve feeding system with a flow rate of 4±1Nm 3 / h gas pre-fluidizes the ammonium polyvanadate material so that the ammonium polyvanadate material is in a fluidized state before entering the fluidized bed. Control the flow rate of compressed air entering the main structure of the fluidized bed from the fluidization gas inlet to 200±10Nm 3 / h, the pressure is 65±2kPa, and the temperature is 220±5℃. The temperature in the main structure of the fluidized bed is controlled by the temperature control member to be 530±5°C, and the residence time of the ammonium polyvanadate material in the main structure of the fluidized bed is 55±5min, which is obtained from the outlet of the coarse particle material and the outlet of the fine particle material Powdered vanadium pentoxide. Among the obtained...

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Abstract

The invention provides a method for producing powdery vanadic anhydride by ammonium polyorthovanadate in a fluidization state. The method comprises the following steps: employing a pre-fluidization system to perform pre-fluidization on an ammonium polyorthovanadate material, introducing the ammonium polyorthovanadate material into a main structure of a fluidized bed in a fluidization state, simultaneously providing compressed air with flow velocity of 120-250Nm<3> / h and pressure of 60-70kPa in the main structure of the fluidized bed from a fluidization gas inlet, controlling the temperature in the main structure of the fluidized bed at 490-560 DEG C through a bar-shaped or plate-shaped member, staying the ammonium polyorthovanadate material for 40-60 minutes in the main structure of the fluidized bed, and obtaining the powdery vanadic anhydride at a coarse grain material outlet and a fine grain material outlet. The method has the advantages of low reaction temperature, energy saving and consumption reduction, the method enables long time and continuous operation; and the V2O5 grade of the products can reach 98 national standard.

Description

technical field [0001] The invention relates to the technical field of fluidized vanadium pentoxide production, in particular, to a fluidized ammonium polyvanadate production of powdered vanadium pentoxide (V 2 o 5 )Methods. Background technique [0002] At present, domestic and foreign industrialized production of powdery V 2 o 5 The method is mainly the "two-step method" of calciner, electric furnace or rotary kiln. "Two-step method" to produce powdered V 2 o 5 The temperature control is complicated, agglomeration is prone to occur, and the energy consumption is large, and the heat utilization rate is not high. In addition, the "two-step method" is a static decomposition, and the decomposition of ammonia and hydrogen will convert V 2 o 5 reduction, so that V 2 o 5 The appearance is uneven in color. Contents of the invention [0003] The purpose of the present invention is to solve at least one of the above-mentioned deficiencies in the prior art. [0004] For...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G31/02
CPCY02P20/129
Inventor 李海丰孙朝晖景涵范川林程晓哲鲜勇陈海军尹丹凤邓孝伯朱庆山
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP