Single vanadium extraction and steelmaking method by converter

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: 2014-12-03
PANGANG GROUP CHENGDU STEEL & VANADIUM
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  • Abstract
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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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  • Single vanadium extraction and steelmaking method by converter

Examples

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Embodiment 1

[0037] Adopt the method of the present invention to produce the corrosion-resistant pipeline steel of product C≤0.12%, P≤0.015%, S≤0.008%, this steel product has strict requirements on the desulfurization process, and its steps are as follows:

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

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

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

Embodiment 2

[0047] Adopt the inventive method to produce product C≤0.25%, P≤0.045%, S≤0.045% hot-rolled ribbed steel bar for reinforced concrete, its steps are as follows:

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

[0049] 2) The vanadium-containing molten iron obtained in step 1) is desulfurized to 0.058% (by mass) after being desulfurized by KR stirring; Vanadium molten iron will be mixed into the converter to extract vanadium and make steel, and the converter needs to be protected by slag splashing in advance.

[0050] 3) Add 80t of vanadium-containing molten iron after desulfurization into the converter with 0.5t of liquid vanadium-containing slag left, add 12t of vanadium-containing solid waste, including 1.2t of vanadium-containing solid waste with a particle size of 1...

Embodiment 3

[0057] Adopt the inventive method to produce the hard wire steel of product C≥0.58%, P≤0.030%, S≤0.030%, its steps are as follows:

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

[0059] 2) Desulfurize the vanadium-containing molten iron obtained in step 1) to 0.035% (in terms of mass) after KR stirring and desulfurization; remove the desulfurization slag in the vanadium-containing molten iron, and the slag removal rate is 98%, and the obtained slag-containing Vanadium molten iron will be mixed into the converter to extract vanadium and make steel, and the converter needs to be protected by slag splashing in advance.

[0060] 3) Add 83t (tons) of vanadium-containing molten iron after desulfurization into the converter with 1t of liquid vanadium-containing slag left, a...

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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 waste. More specifically, embodiments of the present invention relate to a method for single-coupling vanadium-extracting vanadium-containing molten iron and vanadium-containing solid waste in a converter for steelmaking. Background technique [0002] There are a large number 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 after blast furnace smelting contains valuable element vanadium. Loss, vanadium is extracted from hot metal before steelmaking. At present, there are many reports on vanadium extraction from molten iron at home and abroad. The main processes include vanadium extraction by converter, vanadium extraction by shaking ladle and vanadium extraction by ladle. There is only one company for vanadium extract...

Claims

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Application Information

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Patent Type & Authority Applications(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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