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Molten steel alloying apparatus for protecting molten steel during tapping process and electric furnace steelmaking system having apparatus

A technology of molten steel alloying and tapping process, applied in the field of iron and steel metallurgy and steelmaking, can solve problems such as the reduction of molten steel quality, and achieve the effects of reducing steelmaking energy consumption, reducing heat loss, and improving molten steel quality

Pending Publication Date: 2018-06-08
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to overcome the problem in the prior art that the quality of molten steel decreases after tapping and alloying of molten steel, and to provide a device for protecting molten steel alloying during tapping and an electric furnace steelmaking system with the device;

Method used

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  • Molten steel alloying apparatus for protecting molten steel during tapping process and electric furnace steelmaking system having apparatus
  • Molten steel alloying apparatus for protecting molten steel during tapping process and electric furnace steelmaking system having apparatus
  • Molten steel alloying apparatus for protecting molten steel during tapping process and electric furnace steelmaking system having apparatus

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Embodiment 1

[0051] combine figure 1 and Figure 5 , a molten steel alloying device in the protection tapping process of the present invention includes a ladle car 300, a steel tapping protection pipe and an alloy feeder 500, and the ladle car 300 includes a transport car bottom plate 310, a protection pipe control unit 321 and Ladle tank 330 (such as Figure 5 Shown); Wheels are installed on the transport vehicle floor 310 to facilitate the movement of the ladle vehicle 300; the ladle tank 330 is fixedly arranged on the transport vehicle bottom plate 310, and the ladle tank 330 opening is upward;

[0052] The structure of the protection tube control unit 321 and the feeder control unit 322 of this embodiment are the same, and it includes a vertical telescopic mechanism 301, a horizontal telescopic mechanism 302 and a rotation mechanism 303, and the vertical telescopic mechanism 301 is fixedly installed on the ladle car 300 On the bottom plate 310 of the transport vehicle, the horizontal...

Embodiment 2

[0060] The basic content of this embodiment is the same as that of Embodiment 1, except that: the pipe wall of the protective sleeve 100 is provided with an outer shell 104, a heat insulating layer 102 and a refractory material layer 101 (such as figure 2 shown); the shell 104 is made of steel structure with high mechanical strength, and the heat insulating layer 102 is made of heat insulating material, wherein the heat insulating material is glass fiber, asbestos, rock wool or silicic acid Salt, or a combination of the above; the heat insulation material of the heat insulation layer 102 can effectively limit the heat of molten steel in the protective sleeve 100 from dissipating heat to the outside of the protective sleeve 100, reducing the temperature loss in the tapping process, and then reducing the temperature of the tapping. Temperature, saving steelmaking energy consumption. The refractory material layer 101 is arranged on the inner wall of the protective sleeve 100, an...

Embodiment 3

[0062] The basic content of this embodiment is the same as that of Embodiment 2, except that a gap layer 103 (such as figure 2 As shown), that is, a gap is arranged between the shell 104 and the heat insulating layer 102, and constitutes a gap layer 103. The gap layer 103 can be a vacuum condition, or the gap layer 103 filled with any gas. The gap layer 103 of this embodiment Layer 103 is filled with air. The gap layer 103 between the shell 104 and the heat insulation layer 102 changes the heat transfer conditions of the protective sleeve 100, thereby limiting the heat transfer from the molten steel in the protective sleeve 100 to the outside, and reducing the heat loss during the tapping process of the molten steel.

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Abstract

The present invention discloses a molten steel alloying apparatus for protecting molten steel during a tapping process and an electric furnace steelmaking system having the apparatus, and relates to the steelmaking technical field of steel metallurgy. The molten steel alloying apparatus comprises a buggy ladle, a tapping protection tube and an alloy feeder. The buggy ladle comprises a protection tube control unit, a feeder control unit and a ladle pot. The tapping protection tube is installed on the protection tube control unit. The protection tube control unit is used for controlling the position of the tapping protection tube. The tapping protection tube is used for protecting the molten steel during the tapping process. The alloy feeder is installed on the feeder control unit. The feeder control unit is used for controlling the position of the alloy feeder. A relative closed type molten steel channel is established by the tapping protection tube, gas flow on the molten steel surfaceis restricted, alloy materials are added to the ladle for alloying, the quantity of harmful gas such as nitrogen and hydrogen adsorbed by the molten steel during the tapping and alloying processes isreduced, uniform distribution of the alloy elements in the molten steel is promoted by flowing of the molten steel, and quality of alloy steel is improved.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy and steelmaking, and more specifically relates to a molten steel alloying device in the process of protecting steel tapping and an electric furnace steelmaking system equipped with the device. Background technique [0002] After the molten steel is smelted in an electric furnace, the refining outside the furnace and the continuous casting process control the oxygen, nitrogen, hydrogen and temperature in the steel very strictly. However, during the tapping process, the molten steel is in direct contact with the air, causing a large amount of harmful gases such as nitrogen and hydrogen to enter the molten steel. Nitrogen is a harmful element in general steel types. During the tapping process, the exposed molten steel is in direct contact with the air, thereby increasing The nitrogen content in molten steel is generally increased by 10-20ppm. Because the air contains a certain amou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D1/00B22D41/00C21C5/52
CPCC21C5/52B22D1/00B22D41/00Y02P10/20
Inventor 张立强吴朝阳凌海涛彭世恒王海川万勇刘勇
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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