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Vanadium slag comprehensive treatment method and application thereof

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

Pending Publication Date: 2016-09-07
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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  • Vanadium slag comprehensive treatment method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0074] 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:

[0075] (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.

[0076](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 45...

Embodiment 2

[0081] 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:

[0082] (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.

[0083] (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

[0088] 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:

[0089] (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.

[0090] (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 vanadium slag comprehensive treatment method and application thereof. The vanadium slag comprehensive treatment method comprises the steps that vanadium slag, sodium salt and a reducing agent are subjected to mixing and agglomeration treatment to obtain mixed material agglomerates; the mixed material agglomerates are subjected to reducing and smelting treatment to obtain metallized agglomerates; the metallized agglomerates are subjected to melting and separation treatment to obtain reduced iron and vanadium-enriched slag; the vanadium-enriched slag is subjected to oxidizing roasting treatment to obtain vanadium slag clinker; and the vanadium slag clinker is subjected to vanadium extraction treatment to obtain vanadium pentoxide. According to the method, the vanadium-enriched slag, the reducing agent and the sodium salt are mixed and subjected to reducing smelting to recover iron in the vanadium slag; vanadium in the vanadium slag of which iron is recovered is enriched, and the vanadium-enriched slag is obtained; the vanadium-enriched slag is subjected to oxidizing roasting to obtain water-soluble sodium vanadate; and then the vanadium pentoxide in the vanadium-enriched slag is extracted. Through the method, sequential extraction of valuable elemental iron and vanadium in the vanadium slag is realized, and the recovery rate of iron and 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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IPC IPC(8): C22B7/04C22B1/24C22B1/02C22B34/22C22B5/10
CPCC22B1/02C22B1/24C22B5/10C22B7/004C22B7/04C22B34/22Y02P10/20
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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