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Method for improving content of vanadium pentoxide in vanadium slag

A vanadium pentoxide and vanadium slag technology, applied in the direction of manufacturing converters, can solve problems such as sticking to the kiln, and achieve the effects of reducing vanadium slag crushing, reducing energy consumption and improving production efficiency

Inactive Publication Date: 2015-06-24
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above technical problems, the present invention discloses a method for increasing the content of vanadium pentoxide in vanadium slag, which replaces the rotary kiln roasting process in the raw vanadium chemical process, solves the problem of kiln sticking in the roasting process, and makes full use of vanadium slag Oxidation with waste heat, greatly reducing energy consumption and improving production efficiency of vanadium products

Method used

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  • Method for improving content of vanadium pentoxide in vanadium slag
  • Method for improving content of vanadium pentoxide in vanadium slag
  • Method for improving content of vanadium pentoxide in vanadium slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The composition of molten iron is:

[0015]

[0016] (1) Vanadium extraction: Blowing oxygen into the molten iron by blowing top and bottom, and the oxygen supply pressure is controlled at 0.8MPa;

[0017] (2) Oxygen blowing oxidation of vanadium slag: After pouring out the semi-steel, continue to carry out oxygen blowing oxidation on the vanadium slag, adopt the top-bottom double blowing method to blow oxygen, the oxygen pressure is controlled at 0.3MPa, the gun position is controlled at 680mm, and the oxidation temperature is 900°C. V in slag before oxygen blowing 5+ / TV is 0.11, the V in the slag after oxygen blowing ends 5+ / TV is 0.90.

Embodiment 2

[0019] The composition of molten iron is:

[0020]

[0021] (1) Vanadium extraction: Oxygen is blown into the molten iron by top-bottom double-blowing, and the oxygen supply pressure is controlled at 0.75MPa;

[0022] (2) Oxygen blowing oxidation of vanadium slag: After pouring out the semi-steel, continue to carry out oxygen blowing oxidation on the vanadium slag, adopt the top-bottom double blowing method to blow oxygen, the oxygen pressure is controlled at 0.2MPa, the gun position is controlled at 600mm, and the oxidation temperature is 1000℃, V in slag before oxygen blowing 5+ / TV is 0.08, the V in the slag after oxygen blowing 5+ / TV is 0.87

Embodiment 3

[0024] The composition of molten iron is:

[0025]

[0026] (1) Vanadium extraction: Blow oxygen into the molten iron by top blowing, and the oxygen supply pressure is controlled at 0.6MPa;

[0027] (2) Oxygen blowing oxidation of vanadium slag: After the semi-steel is poured out, continue to carry out oxygen blowing oxidation on the vanadium slag, using the top blowing method to blow oxygen, the oxygen pressure is controlled at 0.1MPa, the gun position is controlled at 400mm, and the oxidation temperature is 800°C , V in the slag before oxygen blowing 5+ / TV is 0.12, the V in the slag after oxygen blowing ends 5+ / TV is 0.93.

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Abstract

The invention relates to a method for improving content of vanadium pentoxide in vanadium slag, and belongs to the technical field of metallurgy of vanadium-bearing hot metal. According to the technical scheme, the method comprises the following steps: supplying oxygen and refining vanadium by molten iron by virtue of a converter; pouring out semi-steel, leaving the vanadium slag in a vanadium refining converter, further blowing oxygen and oxidizing; and converting the V2O3 in the vanadium slag into V2O5 by controlling the oxygen blow amount and lance height. According to the scheme, the waste heat of the vanadium slag is fully utilized to oxide; the original chemical procedures of cooling the vanadium slag to a room temperature, crushing, carrying out magnetic concentration of iron and carrying out oxidative roasting in a rotary kiln are changed; the vanadium slag roasting procedure in the original vanadium chemical process is replaced; the energy consumption is greatly reduced; and the production effect of the vanadium product is improved.

Description

technical field [0001] The invention belongs to the technical field of vanadium-containing molten iron metallurgy, and in particular relates to a method for increasing the content of vanadium pentoxide in vanadium slag. Background technique [0002] Iron and steel enterprises that use vanadium iron ore as raw materials, the molten iron used for steelmaking contains trace elements such as vanadium and titanium, referred to as vanadium-containing molten iron. The water first passes through the converter to extract vanadium, then smelts into semi-steel and extracts vanadium slag, wherein the V element in the vanadium slag is represented by V 2 o 3 The form exists in vanadium slag. After the vanadium slag is poured out, it needs to go through crushing→magnetic separation→rotary kiln sodium oxidation and burning to generate pentavalent vanadium compounds that are soluble in water, and then go through water immersion to obtain a vanadium-containing solution. Obtain vanadium oxi...

Claims

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Application Information

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IPC IPC(8): C21C5/36
Inventor 白银舰刘杰张志新
Owner HEBEI IRON AND STEEL
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