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A method for blowing low-silicon vanadium-containing molten iron

A technology of molten iron and content, applied in the direction of manufacturing converters, etc., can solve the problems of low oxidation rate of vanadium, and achieve the effect of improving the oxidation rate, increasing fluidity, and improving the grade of vanadium slag.

Active Publication Date: 2016-06-08
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a new method for blowing low-silicon and vanadium-containing molten iron to overcome the defect that the oxidation rate of vanadium is low when using the existing method to extract vanadium from low-silicon and vanadium-containing molten iron

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  • A method for blowing low-silicon vanadium-containing molten iron
  • A method for blowing low-silicon vanadium-containing molten iron

Examples

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Embodiment 1

[0028] This embodiment is used to illustrate the method for blowing low-silicon and vanadium-containing molten iron provided by the present invention.

[0029] A factory has a 200t vanadium extraction converter, and the semi-steel tapping volume is 210t. The low-silicon vanadium-containing molten iron to be blown has the following components: C: 4.3% by weight, Si: 0.08% by weight, Mn: 0.25% by weight, V: 0.3% by weight, and the rest is Tfe. The temperature of the low-silicon vanadium-containing molten iron is 1280 ℃. Quartz sand contains 98% SiO by weight 2 , the rest is Fe 2 o 3 , and the particle size of quartz sand is 1-3mm. Pour the above-mentioned low-silicon vanadium-containing molten iron to be blown into the converter. Before blowing, add 315kg of the above-mentioned quartz sand into the converter through the silo, and then perform oxygen blowing to extract vanadium. The oxygen blowing intensity is 2.0Nm 3 / min·t molten iron, oxygen blowing time is 5.5 minutes, s...

Embodiment 2

[0034] This embodiment is used to illustrate the method for blowing low-silicon and vanadium-containing molten iron provided by the present invention.

[0035]A factory has a 200t vanadium extraction converter, and the semi-steel tapping volume is 215t. The low-silicon vanadium-containing molten iron to be blown has the following components: C: 4.4% by weight, Si: 0.14% by weight, Mn: 0.31% by weight, V: 0.34% by weight, the rest is Tfe, and the temperature of the low-silicon vanadium-containing molten iron is 1320 °C. Quartz sand contains 97% SiO by weight 2 , the rest are Fe 2 O 3 , and the particle size of quartz sand is 1-3mm. The above-mentioned low-silicon vanadium-containing molten iron to be blown was poured into the converter. Before blowing, 220kg of the above-mentioned quartz sand was added to the converter through the silo, and then the vanadium was extracted by oxygen blowing, and the oxygen blowing intensity was 2.1Nm. 3 / min·t molten iron, the oxygen blowin...

Embodiment 3

[0037] This example is used to illustrate the method for blowing low-silicon vanadium-containing molten iron provided by the present invention.

[0038] A factory has a 200t vanadium extraction converter, and the semi-steel tapping volume is 208t. The low-silicon vanadium-containing molten iron to be blown has the following components: C: 4.5 wt%, Si: 0.06 wt%, Mn: 0.20 wt%, V: 0.25 wt%, the rest is Tfe, and the temperature of the low-silicon vanadium-containing molten iron is 1290 °C. Quartz sand contains 96 wt% SiO 2 , the rest are Fe 2 O 3 , and the particle size of quartz sand is 1-3mm. The above-mentioned low-silicon vanadium-containing molten iron to be blown was poured into the converter, and before blowing, 500kg of the above-mentioned quartz sand was added into the converter through a silo, and then oxygen-blowing was performed to extract vanadium, and the oxygen-blowing intensity was 1.9Nm 3 / min·t molten iron, the oxygen blowing time is 6 minutes, and the slag ...

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Abstract

The invention provides a method for blowing low-silicon and vanadium-containing molten iron, which comprises adding the low-silicon and vanadium-containing molten iron to be blown into a converter for blowing and extracting vanadium, wherein, before blowing and extracting vanadium, the Silica is added to low-silicon vanadium-containing iron water. Using the method of the present invention to extract vanadium by blowing low-silicon vanadium-containing molten iron can not only significantly increase the oxidation rate of vanadium, but also improve the grade of vanadium slag, which is more conducive to the subsequent further processing of these vanadium slags to obtain vanadium products .

Description

technical field [0001] The invention relates to a method for blowing low-silicon and vanadium-containing molten iron. Background technique [0002] Vanadium-containing molten iron with low Si content is very common in the Panxi area where vanadium-titanium magnetite is smelted. The blast furnace smelting of vanadium-titanium magnetite requires that the temperature of the blast furnace should not be too high to ensure that the blast furnace slag has good fluidity during the smelting process and The slag and iron are well separated to ensure the smooth running of the blast furnace. The Si content in these low-silicon vanadium-containing iron waters usually does not exceed 0.2% by weight. However, too low Si content in molten iron is very unfavorable to the extraction of vanadium from molten iron. When this molten iron is directly converted into a converter, the viscosity of the slag is very high and the oxidation rate of vanadium in molten iron is low. The vanadium element i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/36
Inventor 梁新腾曾建华李扬洲龚洪君杨森祥杨晓东喻林陈均何为陈路
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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