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Ladle top-bottom blowing vanadium extracting method

A top-bottom combined blowing and hot metal ladle technology, which is applied in the field of vanadium extraction, can solve problems such as no literature reports and proprietary technologies.

Inactive Publication Date: 2008-12-24
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] From above-mentioned prior art, converter vanadium extraction realizes industrialized production with top or bottom or top and bottom multiple blowing vanadium extracting process (top blowing oxygen, bottom blowing nitrogen), for example, the No. CN1757759A invention patent application discloses a kind of The improvement process of the top and bottom double blowing process of the converter; the vanadium extraction of the ladle includes the side blowing oxygen blowing vanadium extraction process, the top blowing oxygen blowing process or the bottom blowing vanadium blowing process. Oxygen blowing vanadium blowing process, while the ladle top and bottom double blowing vanadium extraction process (top blowing oxygen, bottom blowing nitrogen and other inert gases) has not seen any literature reports and proprietary technologies, which is still a precedent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The vanadium-containing molten iron smelted in the blast furnace is desulfurized and desulphurized to obtain the vanadium-containing desulfurized molten iron. Its composition is: 4.23%C, 0.21%V, 0.010%S, and the balance is mainly Fe; 28t of vanadium-containing desulfurized hot metal and 400kg of iron-containing oxide materials (about 14kg / t.Fe) are loaded inside, and finally oxygen is blown from the top of the ladle (oxygen supply pressure: 0.6MPa), and N is blown from the bottom. 2 (air supply pressure: 0.4MPa) to blow vanadium; within 1-3 minutes of blowing vanadium, add 1000kg of iron-containing oxide materials (about 36kg / t.Fe) into the ladle, supply oxygen for 8 minutes, and remove the vanadium Slag, blowing end point temperature is 1380 ℃. The composition of semi-steel obtained after blowing is: 3.56%C, 0.008%S, 0.030%V. This semi-steel is sent to steelmaking production, and the main components of the obtained vanadium slag are: 1.5% CaO, 6% V 2 o 5 , 11% SiO ...

Embodiment 2

[0017] The vanadium-containing molten iron smelted in the blast furnace is desulfurized and desulphurized to obtain the vanadium-containing desulfurized molten iron. The composition is: 4.4% C, 0.28% V, 0.010% S, and the balance is mainly Fe; Vanadium desulfurization hot metal 130t and iron oxide material 2000kg (about 17kg / t.Fe), and finally through top blowing oxygen (oxygen supply pressure: 0.2MPa) and bottom blowing N 2 (air supply pressure: 0.7MPa) to blow vanadium; within 1-3 minutes of blowing vanadium, add 1900kg of iron-containing oxide materials (about 15kg / t.Fe) into the ladle, supply oxygen for 10 minutes, and remove the vanadium Slag, blowing end point temperature is 1400 ℃. The composition of semi-steel obtained after blowing is: 4.0%C, 0.01%S, 0.033%V. This semi-steel is sent to steelmaking production, and the main components of the obtained vanadium slag are: 2.0% CaO, 16% V 2 o 5 , 16% SiO 2 , 24% TFe, 0.05% P, this vanadium slag water delivery method vana...

Embodiment 3

[0019] The vanadium-containing molten iron smelted in the electric furnace is desulfurized and desulfurized to obtain the vanadium-containing desulfurized molten iron. The composition is: 3.5% C, 0.45% V, 0.010% S, and the balance is mainly Fe; Vanadium desulfurization hot metal 70t and iron-containing oxide material 500kg (about 7kg / t.Fe), and finally through top blowing oxygen (oxygen supply pressure: 1.0MPa) and bottom blowing N 2 (air supply pressure: 0.4MPa) to blow vanadium; within 1-3 minutes of blowing vanadium, add 500kg of iron-containing oxide materials (about 7kg / t.Fe) into the ladle, supply oxygen for 5 minutes, and remove the vanadium Slag, blowing end point temperature is 1360 ℃. The composition of the semi-steel obtained after blowing is: 2.8% C, 0.01% S, 0.04% V. This semi-steel is sent to steelmaking production. The main components of the obtained vanadium slag are: 1.0% CaO, 24% V 2 o 5 , 11% SiO 2 , 28% TFe, 0.038% P, this vanadium slag water delivery me...

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PUM

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Abstract

The invention provides a method for extracting vanadium from the top and bottom of a foundry ladle by combined blowing. The method comprises the following steps that: a vanadium-containing desulfurized molten iron is added into a foundry ladle; vanadium blowing is carried out through blowing oxygen in from the top of the foundry ladle and blowing inert gas in from the bottom of the foundry ladle, wherein, in an early stage of oxygen supply, a ferrous oxide material is added into the foundry ladle; after the vanadium blowing is finished, a low-sulphur semisteel and a vanadium slag are obtained. The method can extract the vanadium slag from the vanadium-containing desulfurized molten iron and produce the low-sulphur semisteel, thereby ensuring that vanadium as a valuable element is effectively extracted from the molten iron.

Description

technical field [0001] The invention relates to a method for extracting vanadium in a steelmaking process, in particular to a method for extracting vanadium from a ladle in a steelmaking process. Background technique [0002] In the prior art, there are many methods for producing vanadium slag at home and abroad. For example, "Through reducing iron smelting, vanadium enters molten iron with iron, and then it is blown into vanadium slag, and V is extracted from vanadium slag. 2 o 5 "It is the best method to comprehensively utilize the valuable elements of vanadium-titanium ore. Long-term research and production practice have proved that this process is more reasonable in terms of economy. Most countries in the world adopt this process, for example, South Africa's shaking bale Side-blown oxygen vanadium extraction process, New Zealand's ladle top-blown oxygen blowing vanadium process, Russia and China's converter top or bottom blowing vanadium process or top-bottom combined ...

Claims

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Application Information

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IPC IPC(8): C21C5/36C22B34/22
CPCY02P10/20
Inventor 戈文荪王咏梅
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP