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Comprehensive treatment method for vanadium slag and application thereof

A comprehensive treatment, vanadium slag technology, applied in the direction of improving process efficiency, etc., to achieve the effect of easy realization, improved recovery rate, metallization rate and recovery rate

Pending Publication Date: 2016-11-09
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The hot spot in the study of vanadium extraction from vanadium slag is how to increase the recovery rate of vanadium, but there are few reports on the recovery of iron in vanadium slag

Method used

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  • Comprehensive treatment method for vanadium slag and application thereof
  • Comprehensive treatment method for vanadium slag and application thereof

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Experimental program
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Effect test

Embodiment 1

[0069] Taking vanadium slag from a vanadium-extracting steelmaking plant in China as raw material, the method of the present invention is used to carry out comprehensive treatment of vanadium slag. The schematic flow chart of the method is as follows figure 1 As shown, the structural diagram of the comprehensive treatment system for vanadium slag is as follows figure 2 As shown, wherein, the vanadium slag contains 35% of total iron and 16% of vanadium pentoxide, and the specific treatment method is as follows:

[0070] (1) Utilize the mixing block making device to vanadium slag and sodium carbonate (analytically pure, content 99.5%) and reduced coal (fixed carbon content 78%), vanadium slag by weight: sodium carbonate: reduced coal=100:15 : 6 carry out batching mixing, obtain mixed material agglomerate.

[0071] (2) Put the mixed material agglomerate into the rotary hearth furnace for direct reduction smelting, the smelting temperature is 1000° C., and the smelting time is 4...

Embodiment 2

[0076] Taking vanadium slag from a vanadium-extracting steelmaking plant in China as raw material, the method of the present invention is used to carry out comprehensive treatment of vanadium slag. The schematic flow chart of the method is as follows figure 1 As shown, the structural diagram of the comprehensive treatment system for vanadium slag is as follows figure 2 As shown, wherein, the vanadium slag contains 42% of total iron and 20% of vanadium pentoxide, and the specific treatment method is as follows:

[0077] (1) Utilize the mixing and agglomerating device to vanadium slag and sodium sulfate (analytically pure, content 99.5%) and semi-coke (fixed carbon content 82%), by weight ratio vanadium slag: sodium sulfate: semi-coke=100:25 : 9 carries out batching mixing, obtains mixed material agglomerate.

[0078](2) Put the mixed material agglomerates into a rotary hearth furnace for direct reduction smelting at a smelting temperature of 1200° C. and a smelting time of 1 ...

Embodiment 3

[0083] Taking vanadium slag from a vanadium-extracting steelmaking plant in China as raw material, the method of the present invention is used to carry out comprehensive treatment of vanadium slag. The schematic flow chart of the method is as follows figure 1 As shown, the structural diagram of the comprehensive treatment system for vanadium slag is as follows figure 2 As shown, wherein, the vanadium slag contains 25% of total iron and 14% of vanadium pentoxide, and the specific treatment method is as follows:

[0084] (1) Utilize the mixing and agglomerating device to vanadium slag and sodium chloride (analytically pure, content 99.5%) and coke (fixed carbon content 86%), by weight ratio vanadium slag: sodium chloride: coke=100:20 :12 carries out batching mixing, obtains mixed material agglomerate.

[0085] (2) Put the mixed material agglomerate into the tunnel kiln for direct reduction smelting, the smelting temperature is 1150° C., and the smelting time is 1.5 hours to ob...

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Abstract

The invention discloses a comprehensive treatment method for vanadium slag and application thereof. The comprehensive treatment method for the vanadium slag includes the steps that the vanadium slag, sodium salt and a reducing agent are subjected to mixing and briquetting treatment, so that mixed material briquettes are obtained; the mixed material briquettes are subjected to reducing smelting treatment, so that metalized briquettes are obtained; the metalized briquettes are subjected to grinding magnetic separation treatment, so that reduced iron and vanadium-rich slag are obtained; the vanadium-rich slag is subjected to oxidizing roasting treatment, so that vanadium slag clinker is obtained; and the vanadium slag clinker is subjected to vanadium extraction treatment, so that vanadium pentoxide is obtained. According to the comprehensive treatment method, the vanadium slag, the reducing agent and the sodium salt are mixed, then the iron in the vanadium slag is recovered through reducing smelting, vanadium is enriched after the iron is recovered from the vanadium slag, and the vanadium-rich slag is obtained; and the vanadium-rich slag is subjected to oxidizing roasting to obtain water-soluble sodium vanadate, and the vanadium pentoxide is extracted from the vanadium slag. The comprehensive treatment method for the vanadium slag realizes step-by-step extraction of valuable elements of the iron and the vanadium in the vanadium slag, and the recovery rate of the iron and the vanadium is high.

Description

technical field [0001] The invention relates to a method for comprehensively treating vanadium slag, and a system for implementing the aforementioned method for comprehensively treating vanadium slag. Background technique [0002] Vanadium has good plasticity and can be rolled into sheets, foils and drawn wires at room temperature, and has elasticity and ductility at a certain temperature. A small amount of intergranular impurities, especially elements such as C, O, N and H, will increase its hardness and brittleness, but decrease its ductility. Vanadium has high impact value, good weldability and heat transfer, and has good corrosion resistance to seawater, alkaline solution, organic acid and inorganic acid. It can be used as structural material and chemical container of ship, seamless thin film Materials for wall pipes, etc. [0003] About 60% of the vanadium in the world is extracted from vanadium slag. Vanadium slag refers to a kind of slag that is rich in vanadium ox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B1/24C22B1/02C22B34/22C22B5/10
CPCC22B1/02C22B1/24C22B5/10C22B7/001C22B7/04C22B34/22Y02P10/20
Inventor 宋文臣王静静李红科曹志成薛逊吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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