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Method for extracting vanadium by sodium salt roasting from vanadium-bearing iron concentrate

A technology of sodium roasting and concentrated ore, which is applied in the field of vanadium extraction by sodium roasting, can solve the problems of low transfer leaching rate and large pollution, and achieve the effect of increasing transfer rate, low equipment requirements and convenient operation

Inactive Publication Date: 2019-05-24
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

[0005] The technical problem solved by the present invention is low transfer leaching rate and large pollution when extracting vanadium-titanium magnetite by sodium roasting

Method used

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  • Method for extracting vanadium by sodium salt roasting from vanadium-bearing iron concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Take 100g of the iron ore concentrate in Table 1 that has passed through a 200 sieve, mix it with 5g of NaF for 10min, and use a lubricating mill to lubricate the mixture for 30min. The mixture is placed in a disc pelletizer and sprayed with 10% sodium hydroxide solution to prepare wet pellets. After the wet pellets are dried, the moisture content is less than 1%. The dried pellets were placed in a muffle furnace for high-temperature calcination at a temperature of 850°C for 60 minutes, and the pellets were taken out at 600°C. Place the taken out pellet clinker in water at 60°C, leaching for 2 hours, and filter and separate to obtain V in the leaching residue. 2 o 5 The content is 0.15%.

Embodiment 2

[0047] Take 100g of the iron ore concentrate in Table 1 that has been passed through a 200 sieve, mix it with 10g of NaF for 30min, and use a lubricating mill to lubricate the mixture for 60min. The mixture is placed in a disc pelletizer and sprayed with 5% sodium hydroxide solution to prepare wet pellets. After the wet pellets are dried, the moisture content is less than 1%. The dried pellets were placed in a muffle furnace for high-temperature calcination at a temperature of 1050°C for 120 minutes, and the pellets were taken out at 700°C. Put the taken-out pellet clinker in water at 80°C, leaching for 24 hours, and filter and separate to obtain V in the leaching residue. 2 o 5 The content is 0.10%.

Embodiment 3

[0049] Take 100g of the iron ore concentrate in Table 1 that has passed through a 200 sieve, mix it with 15g of NaF for 100min, and use a lubricating mill to lubricate the mixture for 120min. The mixture is placed in a disc pelletizer and sprayed with 10% sodium hydroxide solution to prepare wet pellets. After the wet pellets are dried, the moisture content is less than 1%. The dried pellets were placed in a muffle furnace for high-temperature calcination at a temperature of 1200°C for a calcination time of 180 minutes, and the pellets were taken out at 650°C. Place the taken-out pellet clinker in water at 80°C, leaching for 48 hours, and filter and separate to obtain V in the leaching residue. 2 o 5 The content is 0.05%.

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Abstract

The invention relates to a method for extracting vanadium by sodium salt roasting from a vanadium-bearing iron concentrate, and belongs to the technical field of vanadium extraction chemical industry.The method solves the technical problems of low conversion leaching rate and high pollution during existing vanadium-titanium magnetite extraction by sodium salt roasting. The method for extracting vanadium by sodium salt roasting from the vanadium-bearing iron concentrate comprises the steps that a, the vanadium-bearing iron concentrate is crushed and then mixed uniformly with sodium fluoride toobtain a mixture, and then a pellet is obtained by pelletizing, sieving and drying; b, the pellet obtained in the step a is roasted in a high temperature environment to obtain vanadium-containing iron concentrate roasted clinker; and c, the roasted clinker obtained in the step b is placed in a leaching agent for leaching, and vanadium-containing leachate is obtained through separation by filtration. The method can obviously improve the conversion leaching rate of vanadium in the iron concentrate, has the advantages such as simple and easy process, low equipment requirements, convenient operation and low cost, and has good social and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of vanadium extraction chemical industry, and in particular relates to a method for extracting vanadium from vanadium-containing iron concentrate by sodium roasting. Background technique [0002] In the patent CN101358301A method for directly extracting vanadium from vanadium-titanium magnetite concentrate, a method for directly extracting vanadium from vanadium-titanium magnetite concentrate is introduced. The steps included in the method are: a method for directly extracting vanadium from vanadium-titanium magnetite concentrate, The steps involved are: adding sodium sulfate to the vanadium-titanium magnetite concentrate, mixing evenly and then pelletizing; roasting the obtained pellets after pelletizing through high-temperature sodium oxidation; grinding the roasted pellets into powder, and water leaching and washing; purifying the leaching solution to enrich vanadium to obtain a vanadium-containing soluti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22C22B1/16C22B1/24C22B3/04
CPCY02P10/20
Inventor 王显云邹正强吴宝林杨灵锁罗林军涂志洪
Owner 四川大裂谷钒业有限公司
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