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Converter vanadium-extracting method of molten iron containing vanadium

A converter and molten iron technology, applied in the manufacture of converters, etc., can solve the problems of insufficient coolant and low oxidation rate of vanadium, and achieve the effects of reducing production costs, increasing oxidation rate, and reducing the amount of coolant

Active Publication Date: 2014-01-22
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For example, one of the purposes of the present invention is to solve the problem of insufficient coolant and / or low vanadium oxidation rate in the production process of the vanadium extraction workshop in the steelmaking plant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] In this example, the C content in the vanadium-containing molten iron is 4.23%, the V content is 0.361%, and the temperature of entering the furnace for the vanadium-containing molten iron is 1280°C.

[0019] After adding the molten iron into the converter, add pig iron block 10kg / tFe into the converter.

[0020] When the oxygen lance blows oxygen, the gun position is controlled by the "high-low-high" mode, that is, the high gun position of 1.8m is used for the time period from the beginning of blowing to the blowing 0.5min, and the low gun position of 1.5m is used in the mid-stage of blowing. From 1.5 minutes before the end of blowing to the end of blowing, a high gun position of 1.9m is used, and the oxygen supply intensity is controlled at 3.0m 3 / (min·tFe).

[0021] The flow rate of the bottom blowing air in the non-blowing stage is controlled at 0.002m 3 / (min·tFe); for the time period from the beginning of blowing to 1.5min before the end of blowing, use 0.5m 3...

example 2

[0024] In this example, the C content in the vanadium-containing molten iron is 4.45%, the V content is 0.342%, and the temperature of entering the furnace for the vanadium-containing molten iron is 1254°C.

[0025] After adding the molten iron into the converter, add pig iron block 5kg / tFe into the converter.

[0026] When the oxygen lance blows oxygen, the gun position is controlled by the "high-low-high" mode, that is, the high gun position of 1.9m is used for the time period from the beginning of blowing to 1.5min of blowing, and the low gun position of 1.6m is used in the mid-stage of blowing. From 1 minute before the end of blowing to the end of blowing, a high gun position of 2.0m is used, and the oxygen supply intensity is controlled at 2.5m 3 / (min·tFe).

[0027] The flow rate of the bottom blowing air in the non-blowing stage is controlled at 0.002m 3 / (min·tFe); for the time period from the beginning of blowing to 1min before the end of blowing, use 0.1m 3 / (min·...

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PUM

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Abstract

The invention provides a converter vanadium-extracting method of molten iron containing vanadium. The converter vanadium-extracting method comprises the following steps of after the molten iron containing the vanadium enters a converter, adding 5-10kg / t Fe of pig iron; controlling the oxygen supplying intensity of an oxygen gun in the oxygen-blowing smelting stage to be 2.0-3.0m<3> / (min.tFe); at the non-oxygen-blowing smelting stage, introducing air with the flow being less than 0.002m<3> / (min.tFe) into the converter as bottom-blowing gas, introducing air with the flow being 0.1-0.5m<3> / (min.tFe) into the converter as the bottom-blowing gas at the time interval from starting of blowing to 1-1.5 minutes before the end of blowing in the oxygen-blowing smelting stage, and introducing inert gas into the converter as the bottom-blowing gas at the stage beyond the time interval in the oxygen-blowing stage; and adding a vanadium-extracting cooling agent into the converter at the time interval from starting of blowing to 3 minutes after smelting in the oxygen-blowing smelting stage so as to control the temperature of the molten iron in the converter to be lower than 1370 DEG C. The converter vanadium-extracting method provided by the invention has the advantages that the used amount (for example below 5-10kg / t Fe) of the cooling agent can be reduced, the oxidation rate of vanadium is increased (for example, more than 90%), and the purposes of utilizing the resources and reducing the vanadium-extracting cost are easily achieved.

Description

technical field [0001] The invention belongs to the technical field of extracting vanadium from vanadium-containing molten iron, and specifically relates to a method for extracting vanadium from vanadium-containing molten iron in a converter. Background technique [0002] At present, there are a large amount of vanadium-titanium magnetite resources in my country. For example, companies such as Panzhihua Iron and Steel, Chenggang, Kunming Iron and Steel, and Weiyang Iron and Steel all use vanadium-titanium magnetite for smelting. Compared with ordinary molten iron, the molten iron smelted from vanadium-titanium magnetite has a higher vanadium content, and vanadium is a It is an important resource, so vanadium must be extracted before hot metal making steel to produce vanadium slag. At present, there are many production methods for producing vanadium slag at home and abroad, mainly including the ladle blowing vanadium process in New Zealand, the vanadium extraction process in...

Claims

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Application Information

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IPC IPC(8): C21C5/36C21C5/35
Inventor 陈炼陈永戈文荪王建曾建华董克平黄正华
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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