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Molten iron pretreatment slagging-off device and method

A technology for molten iron pretreatment and slag removal, which is applied in the fields of metallurgical equipment and equipment and molten iron pretreatment and slag removal devices, can solve problems such as affecting the efficiency of slag removal, and achieve the effects of simple structure, improved production rhythm, and easy operation.

Pending Publication Date: 2021-06-22
唐山科技职业技术学院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, during the slag removal process, part of the slag will leak from both sides of the slag removal board, and the iron slag needs to be removed repeatedly, which affects the efficiency of slag removal

Method used

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  • Molten iron pretreatment slagging-off device and method
  • Molten iron pretreatment slagging-off device and method
  • Molten iron pretreatment slagging-off device and method

Examples

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Effect test

Embodiment

[0034] A method for removing slag in pretreatment of molten iron, the step of removing slag is:

[0035] Intake nozzle 2. Intake nozzle 31 is communicated with the nitrogen pipeline and connected with high-pressure nitrogen;

[0036] Adjust the pressure regulating valve 4. Keep the nitrogen pressure at the air outlet 30 at 0.3MPa, and slowly approach the slag removal plate 12 to the iron slag liquid level, so that the nitrogen gas is sprayed out from the air outlet 30 to blow away the iron slag around the slag removal board 12, away from the slag removal board 12;

[0037] Slowly insert the slag removal plate 12 into the iron slag liquid level, and adjust the pressure regulating valve 4. Keep the nitrogen pressure at the gas outlet 30 at 1.0 MPa, so that the nitrogen gas from the gas outlet 30 is blown into the iron slag and molten iron to form nitrogen bubbles. During the process of floating up in the molten iron and iron slag, the nitrogen gas bubbles drive the ...

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Abstract

The invention relates to a molten iron pretreatment slagging-off device and method, and belongs to the field of metallurgical equipment devices and technologies. The molten iron pretreatment slagging-off device comprises a slagging-off arm (1), a slagging-off head plate (9), and a slagging-off plate (12), and further comprises a gas inlet pipe opening (2), a gas pipe (6), a connecting pipe (7), a gas inlet (28), an internal gas path (29), a gas outlet (30) and a pipe clamp (5), wherein a protection hanging bracket (18) is assembled on the lower portion of the slagging-off arm (1), nozzles (22) are arranged on the lower portion of the side face of a gas spraying tank, and the nozzles (22) face the slagging-off plate (12). According to the molten iron pretreatment slagging-off method, the slagging-off plate (12) is slowly inserted into the liquid level of iron slag, a pressure regulating valve (4) is adjusted, and nitrogen pressure of the gas outlet (30) is kept at 0.8-1.2 MPa. The device is simple in structure and easy to operate, quick and clean slagging-off operation of iron slag obtained after molten iron pretreatment is achieved, and the service life of the slagging-off plate is prolonged through nitrogen cooling treatment.

Description

technical field [0001] The invention relates to a slagging device and method for pretreatment of molten iron, and belongs to the field of metallurgical equipment and technology. Background technique [0002] With the advancement of science and technology and the development of society, people's requirements for the quality of steel are getting higher and higher. In particular, the output of low-sulfur and ultra-low-sulfur high-quality steel is getting higher and higher. At present, major steel mills generally adopt molten iron pretreatment technology for desulfurization, and slag removal treatment is directly related to the quality of processed molten iron in the process of molten iron pretreatment. Harmful elements such as sulfur in the steel react with the desulfurizer and float up to the slag to form desulfurization slag. If the sulfur-containing desulfurization slag cannot be effectively removed from the ladle, the sulfur-containing iron slag will enter the next process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D43/00C21C7/072
CPCB22D43/005C21C7/072Y02P10/20
Inventor 陈俊东杨丽孙雅平关晓光张明翟福阳段嘉豪孙超
Owner 唐山科技职业技术学院
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