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Roasting method for vanadium extraction

A technology for roasting and roasting clinker, applied in the field of vanadium extraction by roasting, can solve the problems of unsuitability for industrial production, low vanadium conversion rate, high cost of sulfuric acid, etc., and achieves the effects of low production cost, high vanadium extraction rate, and easy operation.

Inactive Publication Date: 2018-12-14
CHENGYU VANADIUM TITANIUM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, vanadium conversion is generally achieved by roasting vanadium-containing ores, and then using acid leaching and other follow-up steps to achieve vanadium extraction. The traditional roasting vanadium extraction processes include: ① direct roasting vanadium extraction, this method is direct oxidation roasting Vanadium ore has less environmental pollution, but the conversion rate of vanadium in this process is very low, and it is not suitable for industrial production. This method has basically been eliminated; Need to spend a lot of sulfuric acid, the cost is high, and it is not favored by industrial manufacturers

Method used

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  • Roasting method for vanadium extraction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The vanadium-containing slag produced by the smelting of vanadium-titanium magnetite is used as raw material, and the size is Grinding for 30 minutes in the dry ball mill for the first time, and then in the size Grind for the second time in a wet rod mill for 15 minutes.

[0040] The front chamber is used in both grinding processes And back warehouse The steel balls are graded, and the output particle size is controlled within the range of 70% to 80%.

[0041] The F-500 air separator is used for material selection. The vanadium iron concentrate after material selection includes vanadium concentrate slag with 120 mesh sieves greater than 80% and 200 mesh sieves less than 30% and 120 mesh sieves with more than 80% and 220 mesh undersize is less than 10% tailings.

[0042] The MFe content in the vanadium slag after material selection is 2.8wt%, the MFe content in the vanadium slag in the returned material is 68%, and the particle size of the vanadium slag is 82%. ...

Embodiment 2

[0047] The vanadium-containing slag produced by the smelting of vanadium-titanium magnetite is used as raw material, and the size is Grinding for 40 minutes in the dry ball mill for the first time, and then in the size Grind for the second time in a wet rod mill for 20 min.

[0048] The front chamber is used in both grinding processes And back warehouse The steel balls are graded, and the output particle size is controlled within the range of 70% to 80%.

[0049] The F-500 air separator is used for material selection. The vanadium iron concentrate after material selection includes vanadium concentrate slag with 120 mesh sieves greater than 85% and 200 mesh sieves less than 25% and 120 mesh sieves greater than 85% and 220 mesh undersize less than 8% tailings.

[0050] The content of MFe in the vanadium slag after material selection is 2.5wt%, the content of MFe in the vanadium slag in the returned material is 70%, and the particle size of the vanadium slag is 85%.

[0...

Embodiment 3

[0055] The vanadium-containing slag produced by the smelting of vanadium-titanium magnetite is used as raw material, and the size is Grinding for 35 minutes in the dry ball mill for the first time, and then in the size Grind for the second time in a wet rod mill for 17.5 minutes.

[0056] The front chamber is used in both grinding processes And back warehouse The steel balls are graded, and the output particle size is controlled within the range of 70% to 80%.

[0057] The F-500 air separator is used for material selection. The ferrovanadium concentrate after material selection includes vanadium concentrate slag with 120 mesh sieves greater than 90% and 200 mesh sieves less than 20%, and 120 mesh sieves with more than 20% of the sieve. 90% and 220 mesh undersize is less than 5% tailings.

[0058] The content of MFe in the vanadium slag after material selection is 2wt%, the content of MFe in the vanadium slag in the returned material is 72%, and the particle size of the...

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Abstract

The invention relates to a roasting method for vanadium extraction and belongs to the technical field of vanadium chemical metallurgy. The method comprises the following steps that vanadium-containingslag produced by smelting vanadium-titanium magnetite is used as a raw material and ground, vanadium-iron concentrate is obtained after sorting, the vanadium-iron concentrate and sodium salt are mixed, and a mixture is obtained; and the mixture is pelletized, dried and roasted in a rotary kiln with the diameter being 3-4 m, and roasted clinker is obtained; the roasted clinker is immersed in water, a vanadium-containing solution is obtained, sulfuric acid is added, then vacuum filtration is adopted, a precipitate is collected, and calcination deamination is conducted, and vanadium pentoxide isobtained. The vanadium-iron concentrate comprises fine vanadium slag with 120 mesh screen underflow being more than 80% and 200 mesh screen underflow being less than 30% and tailings with 120 mesh screen underflow being more than 80% and 220 mesh screen underflow being less than 10%. The method is simple and easy to operate, the vanadium extraction is low, and the yield of vanadium pentoxide ishigh.

Description

technical field [0001] The invention relates to the technical field of vanadium chemical metallurgy, and in particular to a method for extracting vanadium by roasting. Background technique [0002] Vanadium is a widely distributed trace element on the earth, its content accounts for about 0.02% of the earth's crust, and it is relatively easy to obtain. Due to its many excellent physical and chemical properties, vanadium has a wide range of uses. It is known as the metal "vitamin" and is an indispensable and important material for the development of modern industry, modern national defense and modern science and technology. [0003] Vanadium mainly exists in ores in a stable low-valence state (trivalent) in nature. Vanadium in this valence state is not easily soluble in acid-base solutions. To effectively dissolve vanadium from ores, it is necessary to dissolve the ores The vanadium in the vanadium changes from a low-valence state to a high-valence state (quaternary or penta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B34/22C22B3/08
CPCC22B1/02C22B3/08C22B34/22
Inventor 代宾彭望汤波
Owner CHENGYU VANADIUM TITANIUM TECH CO LTD