Method for single-stage vanadium extraction in same converter

A single vanadium extraction and converter technology, which is applied in the manufacture of converters, etc., can solve the problems of large heat loss and the reduction of scrap steel processing, and achieve the effect of solving large heat loss and reducing energy consumption in the converter process

Active Publication Date: 2014-07-02
SICHUAN DAZHOU IRON & STEEL GROUP
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Problems solved by technology

However, my country's double converter vanadium extraction process not only requires a separate converter to extract vanadium from molten iron, but also has a large heat loss in the process of vanadium extraction from molten iron, resulting in a reduction in the amount of scrap steel to be processed

Method used

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  • Method for single-stage vanadium extraction in same converter

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Embodiment 1

[0026] The method for extracting vanadium in the same furnace single-connected converter provided in this embodiment comprises the following steps:

[0027] (1) Put the vanadium-containing molten iron into the converter, and the charging amount is controlled at 82.0 tons / furnace. The carbon content of the molten iron is 3.6% to 0.20%. The temperature of the molten iron is 1290°C, and the total content of silicon, manganese and titanium is 0.90%. , the total content of silicon and titanium is 0.60%;

[0028] (2) Desulfurization of molten iron pretreatment, desulfurization of molten iron to 0.070%;

[0029] (3) Remove the slag in the molten iron so that the amount of slag in the molten iron is 0.5%;

[0030] (4) Temperature measurement and sampling of molten iron. The composition and temperature of molten iron in the furnace must meet the requirements of steps (1) and (2). Mix the molten iron + pig iron into the converter;

[0031] (5) Vanadium blowing in the early stage, the ...

Embodiment 2

[0040] The method for extracting vanadium in the same furnace single-connected converter provided in this embodiment comprises the following steps:

[0041] (1) Put the vanadium-containing molten iron into the converter, and the charging amount is controlled at 79.0 tons / furnace. The carbon content of the molten iron is 5.8%, the vanadium content is 0.40%, the temperature of the molten iron is 1250°C, and the total content of silicon, manganese and titanium is 0.50%, the total content of silicon and titanium is 0.40%;

[0042] (2) Desulfurization of molten iron pretreatment, desulfurization of molten iron to 0.030%;

[0043] (3) Remove the slag in the molten iron so that the amount of slag in the molten iron is 0.2%;

[0044] (4) Temperature measurement and sampling of molten iron. The composition and temperature of molten iron in the furnace must meet the requirements of steps (1) and (2). Mix the molten iron + pig iron into the converter;

[0045] (5) In the early stage of...

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Abstract

The invention discloses a method for single-stage vanadium extraction in the same converter. In a blowing early stage, lime is not added for slagging, vanadium in molten iron is oxidized to enter slag, and silicon, manganese and titanium in the molten iron are oxidized to enter a slag phase; and blowing is stopped after the vanadium is oxidized, vanadium slag is discharged, lime and other slag formers are added for slagging and steelmaking, and qualified molten steel is produced. Compared with the prior art, the method for single-stage vanadium extraction in the same converter has the advantages of reducing temperature loss in the vanadium extracting process, improving the production efficiency of a converter workshop and reducing production cost.

Description

technical field [0001] The invention relates to the field of battery production, in particular to a method for single-connected vanadium extraction with a converter and a furnace. Background technique [0002] As an important metal, vanadium is widely used in many fields. At present, the world's vanadium resources are very limited, which mainly comes from vanadium-titanium magnetite, which accounts for a large proportion of vanadium-containing resources. The main way to recover vanadium from this mine is to convert vanadium-titanium magnetite Raw ore is smelted into vanadium-containing pig iron through blast furnace, and vanadium is recovered from vanadium-containing pig iron. At present, the methods for extracting vanadium from molten iron mainly include shaking ladle vanadium extraction in South Africa and top-bottom dual-link method of converter vanadium extraction in China. However, my country's double converter vanadium extraction process not only requires a separate ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/36
Inventor 王皎月龚波张琦喻春亮王林张华
Owner SICHUAN DAZHOU IRON & STEEL GROUP
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