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Three-section type heating and roasting method for refining vanadium pentoxide

A vanadium pentoxide, three-stage technology, which is applied in the field of three-stage heating and roasting, can solve the problems that the roasting temperature is difficult to control, affects production efficiency, and the conversion rate of vanadium is low, so that the roasting temperature is easy to control, the pollution is small, The effect of high conversion rate of vanadium

Inactive Publication Date: 2012-07-04
彭武星
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages: the roasting temperature is not easy to control, it is easy to coke during roasting, which affects the production efficiency, the energy consumption is large, and the conversion rate of vanadium is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The calorific value of the raw ore is 850 kcal per kilogram, and the raw material with a particle size of less than 10 mm is prepared after crushing. The raw materials first enter the circulating fluidized bed boiler for heating and preliminary decarburization, and the high-temperature decarburized slag enters the first-stage roasting chamber at a temperature higher than 740 degrees Celsius. The first-stage roasting chamber can be filled to 90% of the volume, and the first The pressure air is injected into the raw materials in the first-stage roasting chamber to continue to fully burn the residual carbon in the materials. By controlling the amount of air injected into different parts of the materials, the discharge temperature is controlled at 800-950 degrees Celsius; the materials in the first-stage roasting chamber pass through about 2 After about an hour of deep decarburization and preliminary roasting, the material enters the second-stage roasting chamber at a temper...

Embodiment 2

[0047] On the basis of Example 1, a heat dissipation device and a stirring device are arranged in the first-stage roasting chamber, and the heat dissipation device and the stirring device in the first-stage roasting chamber are controlled to control the roasting temperature and prevent the material from coking.

Embodiment 3

[0049] On the basis of Example 1, a stirring device is set in the second-stage roasting chamber, and the stirring device in the second-stage roasting chamber is controlled to control the temperature of the oxygen-enriched pressure roasting and prevent the material from coking.

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Abstract

The invention discloses a three-section type heating and roasting method for refining vanadium pentoxide, which uses minerals containing vanadium as raw materials. The method includes raw material preparation and raw material heating and roasting. The raw material preparation includes raw material crushing and raw material heating productivity detection. The raw material heating and roasting adopt the following three-section mode: material heating, deep decarburization and preliminary roasting and oxygen-enriched roasting, and the three-section mode can be used independently or in combining mode according to difference of raw material heating productivity. In the deep decarburization and the preliminary roasting and the oxygen-enriched roasting processes, a radiating device and a stirring device are used for controlling material roasting temperature and keeping materials from being coked. Compared with the prior art, the three-section type heating and roasting method for refining the vanadium pentoxide has the advantages of being scientific and reasonable in heating, decarburization and roasting processes of the raw materials, not prone to coke during roasting, small in energy consumption, high in vanadium conversion rate and yield and small in pollution. The roasting temperature is easy to control.

Description

[0001] technical field [0002] The invention relates to a three-stage heating and roasting method for extracting vanadium pentoxide from vanadium-containing materials. Background technique [0003] The heating and roasting of stone coal-type vanadium ore are very important processes in the production of vanadium pentoxide. The existing technology is: the mixture of raw ore after natural heap burning or preliminary decarburization with circulating fluidized bed boiler or fluidized bed furnace, or raw ore, or adding a considerable amount of carbon into the raw material according to the situation Other vanadium-containing materials with insufficient combustible components are roasted in flat kilns, vertical kilns or rotary kilns at room temperature. The heating of the materials and the maintenance of the roasting temperature mainly rely on the carbon contained in the materials to burn and generate heat. Its shortcomings: the roasting temperature is not easy to control, it is ...

Claims

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Application Information

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IPC IPC(8): C22B1/02C22B34/22
Inventor 彭武星彭周雅柔
Owner 彭武星
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