Method for roasting vanadium-containing material by using chain grate machine and rotary kiln

A technology of chain grate machine and rotary kiln is applied in the field of roasting vanadium-containing materials by using chain grate machine and rotary kiln.

Inactive Publication Date: 2020-03-13
四川大裂谷钒业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a method for roasting vanadium-containing materials using chain grates and rotary kilns, which not only solves the problems of material bonding and concentrated heat release, but also greatly improves the conversion rate and leaching rate of vanadium

Method used

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  • Method for roasting vanadium-containing material by using chain grate machine and rotary kiln
  • Method for roasting vanadium-containing material by using chain grate machine and rotary kiln
  • Method for roasting vanadium-containing material by using chain grate machine and rotary kiln

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Embodiment

[0030] The present invention will be further described below in conjunction with embodiment. Among them, the main components of each element in the vanadium slag are shown in Table 1.

[0031] Table 1 Converter vanadium slag chemical composition (%)

[0032]

Embodiment 1

[0033] Embodiment one: Utilize the present invention and the method for extracting vanadium by sodium roasting to process converter vanadium slag in table 1

[0034]Take 1000g of converter vanadium slag powder and 220.87g of anhydrous sodium carbonate and lubricate them in a lubricating mill for 30 minutes to obtain a mixture. Put the mixture in a mixer, mechanically moisten and activate it for 30 minutes, and spray water to obtain a wet mixture with a moisture content of about 6%. The mixture is placed in a granulator to prepare a cylindrical material with a particle size of 5-10 mm. After the powder is removed by the roller sieve, the cylindrical material is evenly spread in the grate machine with a roller sieve machine, the thickness is 100mm, the temperature of entering the blast zone 2 is 200°C, and the residence time in the blast zone 2 is 20min; The initial temperature in the heating zone after the exhaust zone 3 is 650°C, and the residence time is 20 minutes; the init...

Embodiment 2

[0035] Embodiment two: Utilize the present invention and the method for extracting vanadium by sodium roasting to process converter vanadium slag in table 1

[0036] Take 1000g of converter vanadium slag powder and 307.75g of sodium bicarbonate and lubricate them in a lubricating mill for 60 minutes to obtain a mixture. Put the mixed material in a mixer, mechanically moisten and activate it for 60 minutes, and spray water to obtain a wet mixed material with a moisture content of about 8%. The mixture is placed in a granulator to prepare a cylindrical material with a particle size of 5-15mm. After the powder is removed by roller sieving, the cylindrical material is evenly spread in the grate machine with a roller sieve machine, with a thickness of 100mm. The temperature of entering the blast zone 2 is 300°C, and the residence time in the blast zone 2 is 20min; The initial temperature in the heating zone after the draft zone 3 is 650°C, and the time in the preheating zone 4 is ...

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Abstract

The invention relates to the field of chemical methods for extracting vanadium, and in particular relates to a method capable of greatly improving the conversion rate and leaching rate of vanadium forroasting a vanadium-containing material by using a chain grate machine and a rotary kiln. The method comprises the following steps: a, crushing the vanadium-containing material to a required particlesize, mixing the crushed particles and additives, and performing mechanical activation to obtain a mixture; b, uniformly arranging the formed material in the chain grate machine by using a roll screening machine, and performing drying, curing and strengthening in the chain grate machine; and c, allowing the formed material to enter the rotary kiln for concentrated high-temperature roasting, performing discharge to obtain a vanadium-containing formed clinker, crushing the vanadium-containing formed clinker to a required particle size, and performing water leaching or acid leaching to obtain avanadium-containing leaching solution, wherein the vanadium-containing leaching solution is used for subsequent vanadium precipitation. The method uses the chain grate machine and the rotary kiln to roast the vanadium-containing material, has the technical advantages of a simple and easy process, low requirements for equipment, convenient operation, a wide application range and low costs, and is particularly suitable for the vanadium-containing material roasting process.

Description

technical field [0001] The invention relates to the field of chemical methods for extracting vanadium, in particular to a method for roasting vanadium-containing materials by using a chain grate and a rotary kiln. Background technique [0002] Vanadium has a variety of chemical valence states in nature, and it is easy to replace some elements in the ore phase in the form of isomorphism, resulting in complex and changeable vanadium-containing phase structures. Vanadium slag and stone coal are the main vanadium-containing resources in my country, and their vanadium extraction processes are relatively similar. The research results show that vanadium in converter vanadium slag exists in vanadium-containing spinel, and vanadium in stone coal exists in vanadium-containing mica. The vanadium-containing spinel structure and vanadium mica structure are relatively stable, and the unenhanced leaching process can hardly destroy its lattice structure, nor can vanadium be dissolved into ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B7/04C22B34/22
CPCC22B1/02C22B7/007C22B7/04C22B34/22C22B34/225Y02P10/20
Inventor 王显云邹正强吴宝林杨灵锁罗林军凃志洪
Owner 四川大裂谷钒业有限公司
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