KR880002456B1 - Heat-insulting peret for molten steel - Google Patents

Heat-insulting peret for molten steel Download PDF

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KR880002456B1
KR880002456B1 KR1019850008727A KR850008727A KR880002456B1 KR 880002456 B1 KR880002456 B1 KR 880002456B1 KR 1019850008727 A KR1019850008727 A KR 1019850008727A KR 850008727 A KR850008727 A KR 850008727A KR 880002456 B1 KR880002456 B1 KR 880002456B1
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molten steel
heat
weight
thermal insulation
ladle
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KR1019850008727A
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Korean (ko)
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KR870004757A (en
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김병훈
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김병훈
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
    • B22D27/06—Heating the top discard of ingots

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Abstract

Heat-insulating pellets which are thrown over molten steel in a ladle or mold comprises 60 to 80 % of fly ash, 15 to 20% of bentonite, 10 to 15% coke powder, 5 % max. of sawdust. The fly-ash, comprising as constituents, SiO2 46.34%, Al2O3 22.77%, Fe2O3 3.49 %, MgO 2.5%, CaO 0.33%, R2O 1.5%, is collected through dustcollecter of a thermoelectric power plant and has a good heatinsulating property.

Description

용강 단열 보온 페렛트Molten Steel Insulation Thermal Ferret

제 1 도는 본 발명 페렛트를 용강레들(Laddle)에 사용한 상태의 단면도.1 is a cross-sectional view of a state in which a ferret of the present invention is used in a ladle.

제 2 도는 본 발명 페렛트를 주형내에 투입한 상태도.2 is a state in which the ferret of the present invention is put into a mold.

* 도면의 주요 부분에 대한 부호의 설명* Explanation of symbols for the main parts of the drawings

1 : 페렛트 2 : 용강1: Ferret 2: molten steel

3 : 슬래그 4 : 레들3: slag 4: ladle

5 : 주형5: mold

본 발명은 철강 제조작업에서 용강의 운반레들(Laddel) 이나 탈산강(Killed Steel) 주조시 주형내부에 있는 용강상부에 투입하여 방산열(放散熱)을 차단 보온하므로서 용강의 온도를 보존케하여 강괴의 회수율을 극대화시켜주는용강 단열 보온 페렛트(Pellet)에 관한 것이다.The present invention is to keep the temperature of the molten steel by blocking the heat of dissipation by injecting the upper part of the molten steel in the mold during the casting ladle or molten steel casting of molten steel in the steel manufacturing operation It relates to a molten steel thermal insulation thermal pellet (Pellet) to maximize the recovery rate of the ingot.

종래의 용강 보온방법들은 레들이나 주형상부에 왕겨나 가마니 등을 투입하여 이들의 연소되는 비열과 찌꺼기(Ash)로 보온하였으나 그 효과가 미비하였고 고급강 또는 탈산강 주입 작업에 있어서는 레들내의 용강상부가 응고되지 않도록 보온하기 위하여 Al : 20-30%,Al2O3;50-85%, Fe2O3; 12-20%, CaO 10% 이하로 된 분말을 투입하고있으나 분말 투입시 분말의 분산(分散)에 의해 주위환경을 오염시켜 공해문제가 발생되고 투입후에는 공기접촉을 촉진하여 산화 발열되도독 철봉 등으로 저어주어야 하는 불편이 있었고 또한 투입된 분말이 완전 연소되지 못하고 용강내에 잔유하여 불순 개재물로 부상하면 강괴의 결함을 나타내는 문제점이 있었다.Conventional molten steel insulation methods insulated chaff or bale by ladle or mold shape to insulate them with burning specific heat and ash, but the effect is insignificant. Al: 20-30%, Al 2 O 3 ; 50-85%, Fe 2 O 3 to keep warm so as not to solidify; 12-20%, CaO 10% or less powder is added, but when the powder is added, it pollutes the surrounding environment due to the dispersion of the powder and causes pollution problems. There was an inconvenience to stir with the back, and there was a problem in that the injected powder was not completely burned and remained in the molten steel and emerged as an impurity inclusion, indicating a defect of the steel ingot.

본 발명은 이러한 문제점을 해결하기 위하여 레들내에 투입후 분진이 발생하지않으며 퍼짐성이 좋고 단열 보온효과가 양호한 용강 단열 보온 펠레트로서 상세히 설명하면 다음과 같다.The present invention will be described in detail as a molten steel thermal insulation thermal pellets are good in spreadability and good thermal insulation thermal insulation after the input into the ladle to solve this problem.

플라이에쉬(Fly Ash) 60-80%, 벤트나이트(Bento Nite)15-20,%분코우크스(Coke)10-15%,톱밥 5% 이하(제개찌꺼기)를 수분으로 배합하여 소성 가공함으로써 페렛트를 얻었다.Ferret by blending 60 to 80% of fly ash, 15 to 20% of Bento Nite, 10 to 15% of coke, and 5% or less of sawdust (seeds) Got a beat.

본 발명의 페렛트에 포함되는 플라이에쉬는 화력발전소에서 발생되는 그름을 집진장치로 회수한 것으로 그 대표적인 성분을 살펴보면 SiO246.3%, C23.09%, Al2O322.77%, Fe2O33.49%, MgO 2.5%, Cao 0.33%, R2O 1.5%의 중량비로 이루워져 있으며 이 성분들은 단열 보온성, 퍼짐성(유동성) 내화도를 유지한 것으로서 단열 보온효과가 양호하며 50% 이하에스는불량한 것으로 나타났다. (RO=KO 및 NaO)(참 고 : 제조완성된 페렛ㅌ의 성분 : SiO241.48%, Al2O318.08%, Fe2O36.12%, (29.0%) 또 벤토나이트는 바인다재로서 단열효과도 있으나 페렛트화 하기 위한 최저기가 15-20%이다.The fly ash contained in the ferret of the present invention recovers the group gas generated from the thermal power plant by a dust collector. The representative components of the present invention are SiO 2 46.3%, C23.09%, Al 2 O 3 22.77%, Fe 2 O 3 It is composed of 3.49%, MgO 2.5%, Cao 0.33%, R 2 O 1.5%, and these components maintain the thermal insulation insulation, spreadability (fluidity) fire resistance, and the insulation insulation effect is good and 50% or less is poor. appear. (RO = KO and NaO) (Note: Components of the finished ferrets: SiO 2 41.48%, Al 2 O 3 18.08%, Fe 2 O 3 6.12%, (29.0%) Bentonite is a binder material and thermal insulation effect In some cases, the minimum for ferretization is 15-20%.

페렛트의 구성성분중 분코우크스는 플라이에쉬 중에 함유된 탄소성분의 보충이며 톱밥의 경우 페렛트화된 제품내에 기포를 넣어 단열성을 양호하게하기 위한 것이다.Among the components of the ferrets, the coke is supplemented with the carbon component contained in the fly ash, and in the case of sawdust, it is intended to improve the thermal insulation by putting bubbles in the pelletized product.

즉, 도면 제 1 도 및 제 2 도에 도시된 바와 같이 본 발명의 페렛트를 레들(4)내의 용강(2)에 투입하면 슬래그(3)의 액면상에서 용강(2)의 발생열로 착화되어 발열 보온하고 투입된 페렛트(1) 사이사이로 공기가 접촉되어 산화발열을 더욱 촉진시킨다.That is, when the ferret of the present invention is injected into the molten steel 2 in the ladle 4, as shown in FIGS. 1 and 2, the ignition occurs due to the heat generated from the molten steel 2 on the liquid surface of the slag 3 to generate heat. Air is brought into contact between the warmed and introduced ferrets 1 to further promote the oxidation heat.

또한 내화도가 유지되기 때문에 단열 효과가 증대되어 장시간 레들(4)에서 용강이 대기되어도 저하가 되지 않아 주형(5)에 주입을 용이하게 할 수 있다. 이때 레들(4)내이 용강(2)이 온도가 저하될 경우에는 주조작업을 할수 없으므로 재용해 해야하는막대한 손실을 가져오기 때문이다.In addition, since the degree of fire resistance is maintained, the thermal insulation effect is increased, so that even if molten steel is waited in the ladle 4 for a long time, it is easy to inject the mold 5. At this time, when the molten steel (2) in the ladle (4) temperature is lowered because the casting operation is not possible because it causes a huge loss to be remelted.

또 고급강 및 탈산강 제조시에는 주입이 완료된 주형(5)내의 용강(2) 상부에 페렛트(1)를 투입하면 용강(2)에 의해 착화되어 용강 상부층을 단열 보온하므로 용강내의 불순물 부상을 용이하게함은 물론 상부층이 최종 응고되게 되므로 강괴의 수축공 발생을 이상적으로 형성되게 하고 운반과 투입시 비산이 방지되어 주위환경이 오염되지 않으며 구입이 용이한 저가의 원료로서 제제하여 저렴한 가격으로 공급할 수 있고 레들에 투입하여 용융상태의 금속물 주조작업에 널리이용되는 효과가 있다.In the manufacture of high-grade steel and deoxidized steel, when the ferret 1 is placed in the molten steel 2 in the injection mold 5, it is ignited by the molten steel 2 to insulate the molten steel upper layer to insulate the impurities in the molten steel. As well as facilitating the final layer of the upper layer, the formation of the shrinkage hole of the ingot is ideally formed, preventing scattering during transportation and feeding, so that the surrounding environment is not contaminated and prepared as a low-cost raw material that is easy to purchase. It can be put into the ladle and has the effect of being widely used in the casting of molten metal.

이하에서본 발명의 실시예를 설명한다.Hereinafter, an embodiment of the present invention will be described.

[실시예 1-2]Example 1-2

표 1 에 표시한 조성물을 소성 가공하여 페렛트를 얻었다.The composition shown in Table 1 was baked and the pellet was obtained.

이 페렛트에 대하여는가공이 불능한 상태로 표 1 에 나타냈다.This ferret is shown in Table 1 in a state in which machining is impossible.

[실시예 3-4]Example 3-4

표 1 에 표시한 조성물을 실시예 1-2와 같은 동일방법으로 페렛트를 얻었다.The pellet shown to Table 1 was obtained by the same method as Example 1-2.

이 페렛트에 대하여 단열 및 보온력이 모두 양호한 결과를 표 1 에 나타냈다.Table 1 shows the results of good thermal insulation and thermal insulation for this ferret.

[실시예 5]Example 5

표 1 에 표시한 조성물을 동일방법으로 소정 가공하여 페렛트를 얻었다.The composition shown in Table 1 was predetermined-processed by the same method, and the ferret was obtained.

이 페렛트에 대하여 단열 및 보온력은 약간 불량한 것으로 표 1 과 같은 결과를 얻었다.The thermal insulation and thermal insulation power of this ferret were slightly poor, and the results shown in Table 1 were obtained.

[실시예 6]Example 6

표 1 에 표시한 조성물을 동일방법으로 소성 가공하여 페렛트를 얻었다.The composition shown in Table 1 was plastic-processed by the same method, and the pellet was obtained.

이 페렛트에 대하여 단열 및 보온력이 불량하였다.The insulation and heat retention were poor for this ferret.

Figure kpo00001
Figure kpo00001

Claims (2)

용융상태의 금속 주조작업에 있어서 레들(4)이나 주형(5)내에 주입용강의 액면상에 투입하여 단열 및 보온역할을 하도록 플라이에쉬 60-80중량%, 벤토나이트 15-20중량%, 분코우크스 10-15중량%, 톱밥 5중량% 이하로 배합시켜 소성 가공하여서된 용강 단열 보온 페렛트.60-80% by weight of fly ash, 15-20% by weight of bentonite, and bunk coke in order to insulate and insulate the ladle 4 or mold 5 on the liquid level of the injection steel in the molten metal casting operation. A molten steel thermal insulation thermal pellet which is blended with 10-15% by weight and 5% by weight or less of sawdust and calcined. 제 1 항에 있어서 플라이에쉬는 대표적 성분이 SiO246.34%, C23.09%, Al2O3, 22.77%, Fe2O3% 3,49%, MgO 2.5%, CaO 0.33%, R2O 1.5%의 중량비로이루어진 것을 특징으로 하는 용강 단열 보온 페렛트.According to claim 1, the fly ash is a typical component of SiO 2 46.34%, C23.09%, Al 2 O 3 , 22.77%, Fe 2 O 3 % 3,49%, MgO 2.5%, CaO 0.33%, R 2 O Molten steel thermal insulation thermal pellets, characterized in that the weight ratio of 1.5%.
KR1019850008727A 1985-11-21 1985-11-21 Heat-insulting peret for molten steel KR880002456B1 (en)

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