A kind of method of converter single combination extracting vanadium to make steel

A single vanadium extraction and converter technology, applied in the manufacture of converters, etc., can solve the problems of low comprehensive utilization rate, potential safety hazards in the recovery process, low recovery efficiency of vanadium resources, etc., and achieve high slag removal rate and control of slag dumping time Precise, high-angle effects

Inactive Publication Date: 2016-01-20
PANGANG GROUP CHENGDU STEEL & VANADIUM
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  • Abstract
  • Description
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Problems solved by technology

[0010] The present invention overcomes the deficiencies of the prior art, and provides an embodiment of a method for single-integrated vanadium extraction and steelmaking with a converter, with the purpose of solving the problems of low comprehensive utilization rate of vanadium-containing molten iron and vanadium-containing solid waste and low recovery efficiency of vanadium resources, There are safety hazards and other problems in the recycling process

Method used

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  • A kind of method of converter single combination extracting vanadium to make steel

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Experimental program
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Effect test

Embodiment 1

[0037] The method of the invention is used to produce the anti-corrosion pipeline steel with products C≤0.12%, P≤0.015% and S≤0.008%. This steel product has strict requirements on desulfurization process, and the steps are as follows:

[0038] 1) Smelting vanadium titanomagnetite in a blast furnace to obtain vanadium-containing molten iron with C content of 4.35%, Si content of 0.13%, Mn content of 0.22%, P content of 0.093%, S content of 0.075%, and V content of 0.32% .

[0039] 2) Desulfurizing the vanadium-containing molten iron obtained in step 1) to 0.004% (by mass) after KR stirring and desulfurization; removing the desulfurization slag in the vanadium-containing molten iron, the slag removal rate was 99%, and the obtained slag-removing slag contained 99%. The vanadium molten iron will be mixed into the converter to extract vanadium to make steel, and the converter needs to be protected by slag splashing in advance.

[0040] 3) 83t of vanadium-containing molten iron aft...

Embodiment 2

[0047] The method of the present invention is used to produce the hot-rolled ribbed steel bar for reinforced concrete with products C≤0.25%, P≤0.045%, S≤0.045%, and the steps are as follows:

[0048] 1) Smelting vanadium titanomagnetite in a blast furnace to obtain vanadium-containing molten iron with C content of 4.40%, Si content of 0.15%, Mn content of 0.19%, P content of 0.095%, S content of 0.073%, and V content of 0.33% .

[0049] 2) Desulfurizing the vanadium-containing molten iron obtained in step 1) to 0.058% (by mass) after KR stirring and desulfurization; taking out the desulfurization slag in the vanadium-containing molten iron, the slag rate was 97%, and the obtained slag-removing slag contained 97%. The vanadium molten iron will be mixed into the converter to extract vanadium to make steel, and the converter needs to be protected by slag splashing in advance.

[0050] 3) 80t of vanadium-containing molten iron after desulfurization was added to the converter that...

Embodiment 3

[0057] Using the method of the invention to produce hard wire steel with products C≥0.58%, P≤0.030%, S≤0.030%, the steps are as follows:

[0058] 1) Smelting vanadium titanomagnetite in blast furnace to obtain vanadium-containing molten iron with C content of 4.29%, Si content of 0.18%, Mn content of 0.16%, P content of 0.085%, S content of 0.095%, and V content of 0.26% .

[0059] 2) Desulfurizing the vanadium-containing molten iron obtained in step 1) to 0.035% (by mass) after KR stirring and desulfurization; taking out the desulfurization slag in the vanadium-containing molten iron, the slag rate was 98%, and the obtained slag-removing slag contained The vanadium molten iron will be mixed into the converter to extract vanadium to make steel, and the converter needs to be protected by slag splashing in advance.

[0060] 3) adding 83t (tons) of vanadium-containing molten iron after desulfurization into the converter that leaves 1t of liquid vanadium-containing slag, adding 1...

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Abstract

The invention discloses a single vanadium extraction and steelmaking method by a converter. The method comprises the following steps: carrying out KR stirring and desulfurizing on vanadium-containing molten iron to ensure that the sulfur content is reduced to 0.001-0.060%; then, fishing out over 97% of desulfurized slag in the vanadium-containing molten iron; blending the fished vanadium-containing molten iron into the converter filled with liquid vanadium-containing slag; adding vanadium-containing solid wastes for pure oxygen blowing to extract vanadium and make steel; in the blowing process, adding a proper amounts of lime, calcined dolomite and a compound slag former to form slag; then, adjusting the tilting angle of the converter; and pouring out the vanadium-containing slag from a fire door, wherein the vanadium-containing slag is used for extracting vanadium while semisteel left in the converter is continuously blown to prepare initially blown molten steel. The method disclosed by the invention realizes enrichment and cyclic utilization of vanadium resources by fully utilizing the beneficial element vanadium in the liquid vanadium-containing slag and the vanadium-containing solid wastes, thereby forming an efficient path for recycling slag and solid wastes generated by steelmaking of vanadium-containing molten iron. No special coolers are additionally added, so that the resources of the solid wastes are fully utilized and the economic benefit is good.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of metallurgy and comprehensive utilization of solid wastes, and more particularly, embodiments of the present invention relate to a method for single-stage vanadium-smelting steelmaking using vanadium-containing molten iron and vanadium-containing solid wastes. Background technique [0002] There are a lot of vanadium-titanium-magnetite resources in China. In my country, some iron and steel enterprises use vanadium-titanium-magnetite for smelting. The molten iron produced by blast furnace smelting contains valuable element vanadium. Loss, vanadium is extracted before molten iron steelmaking. At present, there are many reports of vanadium extraction from molten iron at home and abroad. The main processes are converter vanadium extraction, shaker vanadium extraction and molten iron tank extraction. There is only one shaker vanadium extraction and molten iron tank extraction, and the manuf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/30C21C1/02C21C7/064
Inventor 易良刚蔡永红蒋世川黄生权戈文荪陶开健陈坤王建滕建明张珉田晓凡余海滨
Owner PANGANG GROUP CHENGDU STEEL & VANADIUM
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