Roasting method for refining vanadium pentoxide

A vanadium pentoxide and roasting technology, which is applied in the direction of improving process efficiency, can solve the problems of low vanadium conversion rate of materials, limited production capacity, low oxidation atmosphere, etc., and achieve scientific and reasonable roasting process, low pollution and low energy consumption Effect

Inactive Publication Date: 2014-05-14
彭武星
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its shortcomings: high energy consumption, high oxygen consumption, low output, low and uneven oxidation atmosphere due to material temperature is difficult to control, low vanadium conversion rate of material, limited production capacity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The calorific value of the raw material is 15 kcal per kilogram. The raw materials are crushed into crushed materials with a particle size of 2-5 mm, and enter the roasting chamber at normal temperature. The high-temperature air with a temperature above 900 degrees Celsius is sprayed into each part of the material in the roasting room through the air pipe arranged in the cavity of the roasting room, and the high-temperature air directly heats the material; Below 920 degrees Celsius, the high-temperature flue gas heats the inner wall, and the inner wall heats the material; the residual carbon in the material is burned to generate heat. The temperature of the material reaches and maintains at 870-890 degrees Celsius. Use this temperature combined with the oxygen in the high-temperature air to deeply decarburize and roast the material.

Embodiment 2

[0062] On the basis of Example 1, an appropriate amount of combustible gas is evenly sprayed into the material whose temperature is lower than 750 degrees Celsius, so that the combustible gas is combusted to generate high-temperature flue gas; and the material is heated.

Embodiment 3

[0064] The calorific value of the raw material is 15 kcal per kilogram. The raw materials are crushed into crushed materials with a particle size of 2-5 mm, and enter the roasting chamber at normal temperature. The high-temperature flue gas with a temperature of 900 degrees Celsius is evenly sprayed into each part of the material in the roasting chamber through the air pipe arranged in the roasting chamber. The high-temperature flue gas is mixed with preheated oxygen-rich gas before spraying into the roasting device to make it contain oxygen The high-temperature flue gas directly heats the material; the temperature of the high-temperature flue gas sent into the interlayer set on the inner wall of the roasting chamber is not lower than 920 degrees Celsius, the high-temperature flue gas heats the inner wall, and the inner wall heats the material; the carbon residue in the material Combustion heat. Make the temperature of the material reach and maintain at 870--890 degrees Celsiu...

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Abstract

The invention discloses a roasting method for refining vanadium pentoxide, which comprises the steps, performing heating roasting to a mixture of raw ore of stone coal navajoite and decarburization slag of the stone coal navajoite, or the raw ore of the stone coal navajoite, or the decarburization slag of the stone coal navajoite, or a vanadium-containing material containing tiny combustible components, or a vanadium-containing material containing no combustible component which serves as a raw material; enabling the raw material to enter into a roasting chamber at an ignition point lower than that of contained carbon or in a normal-temperature state so as to be roasted; enabling a roasting heat source in the roasting chamber to be high-temperature gas directly sprayed into each part of raw material through at least one group of pipelines arranged in the roasting chamber and / or a combustible material evenly sprayed in the raw material through at least one group of pipelines arranged in the roasting chamber, and performing ignition; and being capable of performing crushing, grinding, pelletizing, addition of an additive and the like before the raw material enters into the roasting chamber. The roasting method has the advantages of being scientific and reasonable, low in energy consumption and oxygen consumption, high in vanadium conversion rate and yield and low in pollution.

Description

technical field [0001] The invention relates to a roasting method for refining vanadium pentoxide. Background technique [0002] Vanadium-containing materials, such as stone coal-type vanadium ore, rank first in the world in terms of storage capacity and output in my country. Vanadium has a wide range of uses and plays a major role in the national economy. At present, the main method of roasting vanadium-containing materials to extract vanadium is: use decarbonized stone coal-type vanadium ore and raw ore mixture or raw ore and other vanadium-containing materials that do not contain combustible components to add a considerable amount of carbon as raw materials, in the flat kiln , Shaft kiln, rotary kiln and tunnel kiln for roasting. Its shortcomings: high energy consumption, high oxygen consumption, low output, low and uneven oxidation atmosphere due to the difficulty of controlling the temperature of the material, low vanadium conversion rate of the material, and limited p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/02C22B34/22
CPCY02P10/20
Inventor 彭武星彭周雅柔
Owner 彭武星
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