KR19980038065A - Restraint breakout of slab players and mold flux to reduce cracks in duty free - Google Patents
Restraint breakout of slab players and mold flux to reduce cracks in duty free Download PDFInfo
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- KR19980038065A KR19980038065A KR1019960056915A KR19960056915A KR19980038065A KR 19980038065 A KR19980038065 A KR 19980038065A KR 1019960056915 A KR1019960056915 A KR 1019960056915A KR 19960056915 A KR19960056915 A KR 19960056915A KR 19980038065 A KR19980038065 A KR 19980038065A
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Abstract
본 발명은 슬라브(SLAB) 연주기에서 생산되는 강의 주조시 다발하는 구속성 브랙아웃(BREAK OUT)과 면세로 크랙을 저감하기 위한 몰드 플럭스(MOLD FLUX)에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to restraint breakouts (BREAK OUT) bundled in casting of steel produced in slab players and mold fluxes to reduce cracks duty free.
Description
본 발명은 강의 주조시 사용되는 몰드 플럭스에 관한 것으로, 더욱 상세하게는 슬라브(SLAB) 연주기에서의 흑연을 이용한 몰드플럭스 제조로 주조시 다발하는 구속성 브랙아웃(Break-Out) 및 결함발생을 저감하기 위한 몰드 플럭스(mold flux)에 관한 것이다.는 분말 또는 과립 형상의 합성슬래그(SLAG)를 말한다. 또한, 미설명부호 8은 몰드 슬래그, 9는 침지노즐을 나타낸다. 몰드 플럭스는 윤활제 역할이외에도 복합적인 역할을 수행하는데 이러한 기능을 정리하면 다음과 같다.The present invention relates to a mold flux used in the casting of steel, and more particularly, to reduce the occurrence of constrained break-out and defects during casting by the production of mold flux using graphite in a slab player. The present invention relates to mold flux, which refers to synthetic slag (SLAG) in the form of powder or granules. Reference numeral 8 denotes a mold slag, and 9 denotes an immersion nozzle. Mold flux plays a complex role in addition to lubricants.
(다) 용강을 도포하여 대기와의 재산화를 방지한다.(C) Apply molten steel to prevent reoxidation with the atmosphere.
(마) 주편에서 몰드로의 열전달 매체역할을 한다.드롭 상호간은 배출된 탄소와 미연소 탄소로 인해 융착의 방해를 받게된다.(E) It acts as a heat transfer medium from the cast to the mold, and the mutual drops are hindered by fusion due to the released carbon and unburned carbon.
따라서, 본 발명은 상기 문제점을 해결하기 위하여 안출한 것으로 구속성 브랙아웃 저감 및 면세로크랙 저감을 위한 몰드 플럭스를 제공하는 것을 그 목적으로한다.Accordingly, an object of the present invention is to provide a mold flux for reducing constrained breakout and reducing duty free cracks.
도1은 연속주조용 몰드 내에서의 몰드플럭스의 용융, 유입거동과 역할을 나타내는 모식도,Figure 1 is a schematic diagram showing the melting, inflow behavior and role of the mold flux in the continuous casting mold,
도2는 구속성 브랙아웃의 예를 순서적으로 보여주는 도면,2 is a view showing examples of restrictive breakouts in sequence;
도3은 탄소의 온도증가에 따른 연소를 보여주는 그래프,3 is a graph showing combustion with increasing temperature of carbon;
도4는 몰드내 슬래그베어 생성 모식도,Figure 4 is a schematic diagram of the production of slag bearing in the mold,
도5는 본 발명품의 실시효과를 보여주는 그래프,5 is a graph showing the effect of the present invention,
도6은 동판온도 거동비교를 보여주는 그래프,6 is a graph showing the copper plate temperature behavior comparison;
도7은 몰드플럭스별 전열량 비교를 보여주는 그래프이다.7 is a graph showing a comparison of heat transfer amount by mold flux.
상기 목적을 달성하기 위한 본 발명은 몰드 플럭스 성분중 탄소의 종류를 코크스 파우더(COKE POWDER)에서 흑연(Graphite)으로 변경하는 것을 특징으로 한다.가 코크스파우더인 종래재에 비해서 200℃가 높아서 비교적 높은 온도까지 몰드플럭스를 변화시키지 않고, 유지할 수 있다는 점과 또한 흑연의 연소와 제품의 용융이 근접한 온도에서 이루어지는 특성을 보인다. The present invention for achieving the above object is characterized in that the type of carbon in the mold flux component is changed from coke powder (COKE POWDER) to graphite (Graphite). It can be maintained without changing the mold flux to the temperature, and also has the characteristics that the combustion of graphite and the melting of the product are performed at close temperatures.
상기표의 종래 몰드플럭스(A, B)와 본 발명 몰드플럭스(C)를 실제 슬라브연주기에 적용하면서 구속성 브랙아웃 발생율 및 면세로크랙 발생율을 비교한 결과는 다음 표2와 같다. Table 2 shows the results of comparing the rate of occurrence of constrained breakout and duty free cracks while applying the conventional mold fluxes (A, B) and the mold flux (C) of the present invention to the actual slab rolling period.
실제 슬라브 연속주조기에서의 반복시험결과 구속성 브랙아웃과 면세로크랙 발생율이 도5에서 보이는 것처럼 본발명재 사용할 때 크게 감소함을 확인하였다.As a result of repeated tests in the continuous slab casting machine, it was confirmed that the incidence of restraint breakout and duty-free cracking was greatly reduced when using the present invention as shown in FIG. 5.
이와 같이 구성된 본 발명의 몰드 플럭스는 주편과 몰드간의 마찰력을 감소시키는 윤활작용이 우수하고 몰드 슬래그의 균일한 유입으로 구속성 브랙아웃 및 면세로크랙 발생을 현저히 감소시킨 우수한 발명이다.The mold flux of the present invention configured as described above is an excellent invention that has excellent lubrication action to reduce friction between the cast and the mold, and significantly reduces the occurrence of restrictive breakout and duty free cracks by uniform inflow of mold slag.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960056915A KR19980038065A (en) | 1996-11-23 | 1996-11-23 | Restraint breakout of slab players and mold flux to reduce cracks in duty free |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960056915A KR19980038065A (en) | 1996-11-23 | 1996-11-23 | Restraint breakout of slab players and mold flux to reduce cracks in duty free |
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| Publication Number | Publication Date |
|---|---|
| KR19980038065A true KR19980038065A (en) | 1998-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1019960056915A KR19980038065A (en) | 1996-11-23 | 1996-11-23 | Restraint breakout of slab players and mold flux to reduce cracks in duty free |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007148940A1 (en) | 2006-06-23 | 2007-12-27 | Posco | Continuous casting machine using molten mold flux |
| US8210238B2 (en) | 2006-06-23 | 2012-07-03 | Posco | Continuous casting machine and method using molten mold flux |
-
1996
- 1996-11-23 KR KR1019960056915A patent/KR19980038065A/en not_active Application Discontinuation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007148940A1 (en) | 2006-06-23 | 2007-12-27 | Posco | Continuous casting machine using molten mold flux |
| US8191607B2 (en) | 2006-06-23 | 2012-06-05 | Posco | Continuous casting machine using molten mold flux |
| US8210238B2 (en) | 2006-06-23 | 2012-07-03 | Posco | Continuous casting machine and method using molten mold flux |
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