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Vanadium extracting converter slag adjusting method

A converter and slag adjustment technology, applied in the manufacture of converters, etc., can solve the problems of increasing silicon content in molten steel, expensive ferrosilicon, increasing heat, etc., and achieve the effects of reducing steel material consumption, obvious price advantage, and lowering melting point

Inactive Publication Date: 2017-03-22
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

[0009] However, the use of ferrosilicon as a vanadium slag modifier will increase the silicon content in molten steel and increase the heat. After use, although the total iron content in the vanadium slag can be reduced to a certain extent, the total iron content in the vanadium slag remains the same. Higher, needs to be further lowered
In addition, although ferrosilicon is effective in reducing the oxidation of vanadium slag and promoting the separation of slag and iron, the price of ferrosilicon is relatively expensive, generally around 6,000 yuan / t, and the cost is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Mix sodium salt and high-strength cement with water according to the following proportions: sodium salt: 95%, high-strength cement: 5%, use a briquetting machine to press into pellets with a diameter of 35mm, and make sodium salt after baking to remove water Modifier finished product, wherein, the main component of sodium salt is: Na 2 CO 3 Content ≥ 98%, the rest is SiO 2 .

[0035] In a 120-ton converter in a steel plant, the amount of semi-steel molten steel is 133t. One minute before the end of converter blowing, the Si content in molten iron was determined to be 0.04%, and this sodium salt modifier was added to finish 1.8kg / t of steel. After blowing, the steel was tapped. After sampling analysis, the TFe content in the vanadium slag was reduced from the original 38% to 14%, and the TFe in the vanadium slag was effectively reduced.

Embodiment 2

[0037] Mix sodium salt and high-strength cement with water according to the following proportions: sodium salt: 98%, high-strength cement: 2%, use a briquetting machine to press into pellets with a diameter of 50mm, and make sodium salt after baking to remove water Modifier finished product, wherein, the main component of sodium salt is: Na 2 CO 3 Content ≥ 98%, the rest is SiO 2 .

[0038] In a 120-ton converter in a steel plant, the amount of semi-steel molten steel is 135 tons. One minute before the end of converter blowing, measure the Si content in molten iron to be 0.05%, add this sodium salt modifier to finish 1.4kg / t steel, and tap after blowing. After sampling and analysis, the TFe content in the vanadium slag was reduced from 39% to 13%, and the TFe in the vanadium slag was effectively reduced.

Embodiment 3

[0040] Mix sodium salt and high-strength cement with water according to the following proportions: sodium salt: 95%, high-strength cement: 5%, use a briquette machine to press into pellets with a diameter of 30mm, and make sodium salt after baking to remove water Modifier finished product, wherein, the main component of sodium salt is: Na 2 CO 3 Content ≥ 98%, the rest is SiO 2 .

[0041] In a 120-ton converter in a steel plant, the amount of semi-steel molten steel is 133t. One minute before the end of the converter blowing, the Si content in the molten iron was determined to be 0.08%, and this vanadium slag modifier was added to finish 1.1kg / t of steel, and after the end of the blowing, the steel was tapped. After sampling and analysis, the TFe content in the vanadium slag was reduced from 37% to 13%, and the TFe in the vanadium slag was effectively reduced.

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Abstract

The invention relates to a vanadium extracting converter slag adjusting method, and belongs to the technical field of converter vanadium extraction. The technical problem to be solved by the invention is to provide the vanadium extracting converter slag adjusting method capable of further reducing the iron loss. The method comprises the following steps: molten vanadium-titanium contained iron is mixed into a converter; a sodium salt modifying agent is added within one minute before ending of blowing; and after the blowing is finished, the tapping is performed to obtain semisteel and vanadium slag. Before the blowing is finished, the sodium salt modifying agent is adopted to adjust the slag; and the converter vanadium slag components can be controlled within a proper range before tapping of the converter, so that the purposes of reducing the vanadium slag melting point, optimizing the vanadium slag slag-iron separation effect and reducing the steel-iron consumption are achieved.

Description

technical field [0001] The invention relates to a method for adjusting slag in a vanadium-extracting converter, and belongs to the technical field of vanadium-extracting converter. Background technique [0002] The main principle of vanadium extraction is to use the principle of selective oxidation, using high-speed pure oxygen jet to stir the vanadium-containing molten iron in the top-blown converter, and oxidize the vanadium in the molten iron into high-priced and stable vanadium oxides to prepare vanadium slag. chemical reaction process. During the reaction process, the temperature of the molten pool is controlled below the conversion temperature of carbon and vanadium by adding a coolant, so as to achieve the purpose of "removing vanadium and preserving carbon". [0003] The oxidation reaction of vanadium is: [0004] 2 / 3[V]+1 / 2{O 2}=1 / 3(V 2 o 3 ) (1) [0005] 2[V]+3(FeO)=(V 2 o 3 )+3[Fe] (2) [0006] Vanadium has two reactions under the condition of oxygen blow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/36
CPCC21C5/36
Inventor 梁新腾曾建华陈永李扬洲杨森祥陈均陈路龚洪君喻林
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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