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Method for reducing content of ferric oxide in vanadium slag

A technology of iron oxide and vanadium slag, which is applied in the field of metallurgy, can solve the problems of reduced vanadium recovery rate, low carbon content of semi-steel unfavorable steelmaking, etc., and achieve the effect of improving grade, reducing iron oxide content, and reducing the loss of iron elements

Active Publication Date: 2020-03-24
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the selective oxidation of carbon and vanadium in molten iron, it can be seen that when the temperature of the molten pool is too high, carbon will be oxidized in large quantities, and at the same time, the oxidation of vanadium will be inhibited. Reduce vanadium recovery

Method used

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Experimental program
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Effect test

Embodiment 1

[0032] This embodiment provides a method for reducing the content of iron oxide in vanadium slag. The method includes: after converting vanadium extraction and blowing, adding additives to the furnace and reacting in a protective atmosphere to obtain vanadium slag; wherein, the The addition amount of additive is 2kg / ton of iron; The additive is coke powder; The particle size of the additive is 2mm; The protective atmosphere is nitrogen; The reaction time is 60s; The protective atmosphere is provided by a spray gun; The spray gun is pulled back and forth 3 times between 1-1.5m; the pressure of the protective atmosphere is 1.2MPa.

[0033] The iron oxide content in the obtained vanadium slag is 34.15%, and the vanadium grade in the vanadium slag is 12.34%.

Embodiment 2

[0035]This embodiment provides a method for reducing the content of iron oxide in vanadium slag. The method includes: after converting vanadium extraction and blowing, adding additives to the furnace and reacting in a protective atmosphere to obtain vanadium slag; wherein, the The addition amount of additive is 2.5kg / ton iron; Described additive is charcoal; The particle size of described additive is 5mm; Described protective atmosphere is nitrogen; The time of described reaction is 72s; Described protective atmosphere is provided by spray gun; The spray gun is pulled back and forth 4 times between 1-1.5m; the pressure of the protective atmosphere is 2MPa.

[0036] The iron oxide content in the obtained vanadium slag is 33.59%, and the vanadium grade in the vanadium slag is 12.72%.

Embodiment 3

[0038] This embodiment provides a method for reducing the content of iron oxide in vanadium slag. The method includes: after converting vanadium extraction and blowing, adding additives to the furnace and reacting in a protective atmosphere to obtain vanadium slag; wherein, the The addition amount of additive is 3kg / ton iron; Described additive is petroleum coke; The granularity of described additive is 3.8mm; Described protective atmosphere is nitrogen; The time of described reaction is 100s; Described protective atmosphere is provided by spray gun; The spray gun is pulled back and forth 5 times between 1-1.5m; the pressure of the protective atmosphere is 3MPa.

[0039] The content of iron oxide in the obtained vanadium slag is 32.27%, and the grade of vanadium in the vanadium slag is 13.31%.

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PUM

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Abstract

The invention relates to a method for reducing the content of ferric oxide in vanadium slag. The method comprise the steps of: after vanadium extraction blowing through a converter is finished, addingan additive into the converter, and performing reacting in a protective atmosphere to obtain the vanadium slag. According to the method provided by the invention, ferric oxide in the vanadium slag isreduced to generate iron elementary substance and carbon monoxide, the iron elementary substance enters the semisteel, and the carbon monoxide is discharged along with furnace gas. By adopting protective gas blowing and gun drawing operation, the stable state of the vanadium slag in the converter is destroyed, the discharge of carbon monoxide is accelerated, and the reduction reaction is promoted. Finally, the purpose of reducing the iron oxide content in the vanadium slag is achieved.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for reducing iron oxide content in vanadium slag. Background technique [0002] Vanadium resource is an important scarce resource in the country and even in the world. It is called "the monosodium glutamate of modern industry". The production capacity is mainly distributed in China (44.8%), South Africa (20.8%), Russia (13.8%), the United States (7.6%), Vanadium in Australia (4.6%) and other countries (8.4%) is widely used in steel, chemical, aerospace and military industries, and more than 90% of vanadium is used in the steel industry, mainly in special steel, low alloy steel and Some common carbon steel products. The development and utilization of vanadium resources in the world is characterized by the development of vanadium-chrome magnetite, supplemented by other resources. The vanadium produced from vanadium-chrome magnetite accounts for 85% of the total, and th...

Claims

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Application Information

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IPC IPC(8): C22B34/22C21C5/36C21C5/30
CPCC22B34/22C21C5/36C21C5/30
Inventor 李亚厚康毅靳刚强王金星连庆王琪
Owner HEBEI IRON AND STEEL
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