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Refining method of molten iron in ladle and devices required by same

A technology of molten iron and equipment, which is applied in the field of molten iron refining in ladles, and can solve problems such as large iron loss

Inactive Publication Date: 2011-10-12
YINGKOU DSMK TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 3. The iron that enters the slag in the form of iron particles and is discarded with the slag after the treatment is finished is quite large.

Method used

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  • Refining method of molten iron in ladle and devices required by same
  • Refining method of molten iron in ladle and devices required by same
  • Refining method of molten iron in ladle and devices required by same

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Embodiment Construction

[0033] The present invention takes into account the characteristics of the desulfurization process in the molten iron ladle, that is, the gas jet is used to supply the desulfurizer. In addition to the conveying function, the jet also strengthens the stirring of the molten iron in the ladle, thereby speeding up the mass and heat exchange process and the refining process.

[0034] In order to solve this problem, this method is specially proposed, which includes using carrier gas jet to supply desulfurizer into molten iron through a submerged spray gun (inside the spray gun body-metal conduit). The Act differs in that:

[0035] When desulfurization is carried out, a low-voltage potential is applied to the molten iron. The way to form the potential is to provide a current from one pole of the power supply to the molten iron space where the outlet of the spray gun is located through the spray gun, and from the other pole to pass through a conductive electrode (submerge it into the m...

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Abstract

The invention belongs to the black metallurgy field and particularly relates to a molten iron refining method for treating and desulfurizing molten iron outside the furnace in a ladle, and devices required by the same. The desulfurizing process is performed by applying a low electric potential in melt (5); and the way of forming the low electric potential is that one pole of a power supply (1) applies current on the molten iron space of the outlet of a spray gun (2) through the spray gun, and the other pole of the power supply (1) provides current through a conductive electrode (6) soaked in molten iron. The method for forming the low electric potential comprises the following steps: the conductive electrode (6) is soaked in molten iron to ensure that the electrode is at 5-15% of the height of molten iron, the conductive electrode (6) is moved into slag after the first half of converting and is at 40-60% of the depth of slag, and current is applied on the power supply (1) under the condition that the voltage is 10-60V. By adopting the refining method, the utilization rate of desulfurizer for direct desulfurization can be increased, heat loss can be reduced, and the number of iron particles can be lowered so as to increase the yield of qualified molten iron.

Description

technical field [0001] The invention belongs to the category of ferrous metallurgy, and in particular relates to an in-ladle molten iron refining method for performing desulfurization of molten iron outside a furnace in a molten iron ladle and equipment required for implementing the method. Background technique [0002] It is known that the useful powdery material is the method of hot metal desulfurization, such as using magnesium or magnesium-based mixture (containing lime, calcium carbide, dolomite, and other additives), the mixture can improve the ability of capping slag to hold sulfur (sulfur capacity) , the equipment used to realize the above method (see figure 1 ) includes a meter (101) for the feeder (201), a system for injecting desulfurizer and monitoring the feeding (301), a submerged fire-resistant spray gun and its tubular inner channel (401) made of metal materials, a mobile spray gun Spray gun rod (501), desulfurizer supply line (601) (connecting spray gun and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C1/02C21C7/064
Inventor С·И·谢梅金В·Ф·帕利亚科夫В·И·博尔沙科夫А·Ф·舍甫钦柯刘东业
Owner YINGKOU DSMK TECH DEV
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