A kind of method for reducing iron oxide content in vanadium slag

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

Active Publication Date: 2022-02-25
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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Examples

Experimental program
Comparison scheme
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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Abstract

The invention relates to a method for reducing the content of iron oxide in vanadium slag. The method comprises: after the vanadium extraction and blowing in a converter is completed, adding additives to the furnace and reacting in a protective atmosphere to obtain vanadium slag. By the method provided by the invention, the iron oxide in the vanadium slag is reduced to generate elemental iron and carbon monoxide, wherein the elemental iron enters the semi-steel, and the carbon monoxide is discharged with the furnace gas. By adopting the operation of blowing protective gas and pulling the gun, the stable state of vanadium slag in the furnace 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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Patent Type & Authority Patents(China)
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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