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Mold flux and continuous casting method using the same

A technology of mold slag and continuous casting, which is applied to casting equipment, casting molten material container, control of molten metal pouring from casting ladle, etc. It can solve problems such as breakout, reduction of heat average, mixing of mold slag, etc., and achieve improvement quality, suppression of surface cracks, and effects of improving lubricating performance

Inactive Publication Date: 2013-02-13
POHANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, more mold flux is mixed into the molten steel, and the average amount of heat transferred decreases
As a result, lead to breakout

Method used

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  • Mold flux and continuous casting method using the same
  • Mold flux and continuous casting method using the same
  • Mold flux and continuous casting method using the same

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Embodiment Construction

[0032] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention is not limited to the following examples. Furthermore, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. In the drawings, the same reference numerals denote the same elements.

[0033] image 3 is a diagram showing a schematic structure of a continuous casting machine using molten mold flux.

[0034] refer to image 3 , the continuous casting machine includes: mold 10; submerged nozzle 30, used to supply molten steel to mold 10; mold cover 100, used to cover the upper part of mold 10; mold slag melting unit 200, used to melt the Mold slag for the mold; the mold slag deli...

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Abstract

A continuous casting method which can prevent solidification of a molten steel surface and can improve quality of a casting slab and stability of an operation by controlling the absorption coefficient of a mold flux during a molten mold flux operation is provided. As a mold flux used in continuous casting, the mold flux has an absorption coefficient of 1000 / m or more relative to a wavelength of 500 to 4000 nm in the molten state, does not contain fluorine, contains 2 wt.% or less of a transition metal oxide, and has a basicity of 0.5 to 1.5. A continuous casting method comprises the steps of: melting a mold flux that has an absorption coefficient of 1000 / m or more relative to a wavelength of 500 to 4000 nm in the molten state, does not contain fluorine, contains 2 wt.% or less of a transition metal oxide, and has a basicity of 0.5 to 1.5 outside a mold; and controlling a flow amount of the molten mold flux to inject the molten mold flux into the mold over the entire continuous casting process.

Description

technical field [0001] The present invention relates to a mold flux and a continuous casting method using the mold flux, more particularly, to a continuous casting method using molten mold flux. Background technique [0002] In a general steelmaking method, a pretreatment process of molten iron, a converter refining process, a secondary refining process, and a continuous casting process are sequentially performed. [0003] Such as figure 1 As shown, in order to manufacture castings (i.e. general terms for slab, billet, bloom, shaped billet, etc.) 2 and crystallizer 3. Then, the molten steel is cooled in the mold 3 by the cooling action of the mold 3 and forms a solidified shell 5 . The solidified shell 5 formed by cooling molten steel is solidified by secondary cooling water sprayed through nozzles while being guided by guide rolls provided below the crystallizer, thereby manufacturing an all-solid casting. [0004] When molten steel is supplied to the mold during the co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/108
CPCB22D11/108B22D11/16B22D37/00B22D41/005B22D41/50
Inventor 赵重郁郑玹锡金句和朴重吉李相浩文己显
Owner POHANG IRON & STEEL CO LTD
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