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Method and apparatus for controlling the flow of molten steel in a mould

一种控制结晶、钢水的技术，应用在用于控制结晶器中的钢水流动和装置领域，能够解决结晶器扰流、喷嘴流动冲突等问题

Inactive Publication Date: 2009-07-01
ABB (SCHWEIZ) AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Agitation at a lower position can interfere with the flow in the nozzle and cause undefined turbulence in the crystallizer

Method used

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  • Method and apparatus for controlling the flow of molten steel in a mould
  • Method and apparatus for controlling the flow of molten steel in a mould
  • Method and apparatus for controlling the flow of molten steel in a mould

Examples

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Embodiment Construction

[0023] Embodiments of the present invention are described below with reference to the accompanying drawings. figure 1 and figure 2 Respectively are the schematic diagrams of the slab continuous casting machine used when implementing the present invention. More specifically, figure 1 and figure 2 Both are schematic perspective / front views of parts of a crystallizer according to the invention.

[0024] refer to figure 1 and figure 2 , a tundish (not shown) is provided at a predetermined position above the crystallizer 1, the crystallizer 1 has crystallizer long sides 2 facing each other and mutually opposing crystallizer long sides 2 arranged inwardly between the crystallizer long sides 2 Short side of the crystallizer 3. A submerged nozzle 4 is provided in contact with the bottom surface of a slide nozzle (not shown) connected to the tundish, and has a pair of discharge ports 5 at its lower portion. A molten steel outflow port 6 is formed for allowing molten steel to ...

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PUM

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Abstract

A method for controlling a flow of molten steel in a mould by applying at least one magnetic field to the molten steel in a continuous slab casting machine. This is achieved by comprising controlling a molten steel flow velocity on a molten steel bath surface, meniscus, to a predetermined molten steel flow velocity by applying a static magnetic field to impart a stabilizing and braking force to a discharge flow from an immersion nozzle when the molten steel flow velocity on the meniscus is higher than a mould powder entrainment critical flow velocity and by controlling the molten steel flow velocity on the meniscus to a range of from an inclusion adherence critical flow velocity or more to a mould powder entrainment critical flow velocity or less by applying a shifting magnetic field to increase the molten steel flow when the molten steel flow velocity on the meniscus is lower than the inclusion-adherence critical flow velocity.

Description

technical field [0001] The present invention relates to a method and device for controlling the flow of molten steel in a mold using a slab continuous caster, and a method for producing slabs using the flow control method and device. Background technique [0002] A quality factor required for castings produced by continuous slab casters is a low amount of inclusions entrained in the surface layer of the casting. Examples of such inclusions entrained in the casting surface are: [0003] (1) Deoxidation products produced in the deoxidation step using aluminum or the like and suspended in molten steel; [0004] (2) Argon bubbles blown into molten steel in the tundish or argon bubbles blown in through the immersion nozzle; [0005] (3) Inclusions produced by mold slag sprayed on the liquid surface of molten steel pool and entering molten steel as suspended substances. [0006] Any of these inclusions can cause surface defects in the steel, so it is important to reduce inclusi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/115
CPCB22D11/115B22D27/02B22D11/16
Inventor A·莱曼H·哈克尔J-E·埃里克森O·斯约登
Owner ABB (SCHWEIZ) AG
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