Casting equipment and casting method

Abstract

The present disclosure relates to a casting apparatus and a casting method. The casting method includes injecting a molten material into a mold by using a nozzle, forming a static magnetic field applied region and a non-static magnetic field applied region in a width direction of the mold and controlling a flow of the molten material in a longitudinal direction of the mold, and drawing a cast slab. Through this, as the flow of the molten material accommodated in a container is locally controlled, cleanliness of the molten material may be secured, and a quality of a product may be improved.

Description

TECHNICAL FIELD[0001]The present disclosure relates to a casting apparatus and a casting method, and more particularly, to a casting apparatus and a casting method, which are capable of controlling a flow of a molten material to secure a cleanliness of the molten material, thereby improving a quality of a product.BACKGROUND ART[0002]In general, a continuous casting process may produce various shaped cast slabs such as a slab, a bloom, a billet, and a beam blank by injecting molten steel into a mold having a predetermined inner shape and continuously drawing a semi-solidified cast slab downward from the mold. The cast slab produced as described above has a surface quality and an inner quality, which are affected by various factors. Particularly, the surface quality of the cast slab is highly affected by a flow of the molten steel in the mold.[0003]When a molten material is injected into a mold by using a submerged entry nozzle in the continuous casting process, the molten material di...

AI Technical Summary

Benefits of technology

The patent text describes a method for controlling the flow of molten material in a container, which can improve the quality of products made from the material. By using a static magnetic field to control the flow in the width direction of the mold, the inclusions in the material can be reduced and the material can easily float upward, which prevents quality degradation of the product. Additionally, the dynamic magnetic field can be used to control the flow of material around the mold surface, preventing unwanted materials from mixing in with the molten material. This improves the cleanliness of the material and the quality of the products made from it.

Problems solved by technology

Particularly, the surface quality of the cast slab is highly affected by a flow of the molten steel in the mold.

The molten material moving toward the central portion of the mold collides with the molten material moving in an opposite direction and the submerged entry nozzle to form a vortex at the molten surface around the submerged entry nozzle, thereby causing instability of the flow of the molten surface.

Here, the instability of the flow of the molten surface becomes worse as a flow velocity of the upflow increases and causes a different kind of material such as mold slag or mold flux disposed at an upper portion of the molten surface of the molten material to be mixed into the molten material.

However, when the movement distance of the inclusion is changed according to a flow velocity of the downflow, and the downflow has a fast flow velocity, the inclusion is permeated to a solidified cell and causes a surface defect of the produced cast slab.

However, in the process of controlling the downflow, formation of the secondary upflow generated by the downflow is also restricted.

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