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KR850001201B1 - Composition of check plug for outflow of molten metals - Google Patents

Composition of check plug for outflow of molten metals Download PDF

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KR850001201B1
KR850001201B1 KR1019830001585A KR830001585A KR850001201B1 KR 850001201 B1 KR850001201 B1 KR 850001201B1 KR 1019830001585 A KR1019830001585 A KR 1019830001585A KR 830001585 A KR830001585 A KR 830001585A KR 850001201 B1 KR850001201 B1 KR 850001201B1
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composition
casting
casting hole
outflow
molten metal
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KR840008436A (en
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천세영
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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
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/18—Controlling or regulating processes or operations for pouring
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories

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  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Mold Materials And Core Materials (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Abstract

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Description

주조용기(鑄造容器)의 용량 유출방지 조성물Capacity outflow prevention composition of casting container

제1도는 주조작업 개략도.1 is a schematic view of the casting operation.

제2도는 주조시 본 발명 조성물이 파괴되어 낙하하는 상태도.2 is a state in which the composition of the present invention breaks down during casting.

제3도는 주조용기 저부의 주조공(鑄造孔)부위 절개도.3 is a cutaway view of the casting hole at the bottom of the casting vessel.

본 발명은 고열로 용융(溶融)된 금속류 용탕(溶湯)의 주조작업에서 주조용기내의 주조공이 용탕(溶湯)응고에 의하여 폐쇄되지 않도록 주조공안에 용탕 유출방지 조성물을 넣어 표면에 피막 용착대를 만들어 주조공이 잘 조절되어 주조에 용이하도록 한 것이며, 철주물(鐵鑄物), 주강(鑄鋼), 동주물등 주로 금속 용탕주조에 공통으로 사용되나, 특히 고열용량 주조에 더욱 효과를 발휘한다. 종래에는 일반규사를 충진 사용하거나 규사에 내화재와 흑연 등을 혼합하여 주조공에 용탕이 침입 응고되므로써, 주입작업에 실패하는 일이 허다 하였다.In the present invention, in order to prevent the casting hole in the casting vessel from being closed due to the solidification of the molten metal in the casting operation of the molten metal melted at a high temperature, a molten metal spill prevention composition is put into the casting hole to form a film welding stand on the surface. The casting hole is well controlled to facilitate casting, and is commonly used for casting of molten metal, such as iron casting, cast steel, and copper casting, but is particularly effective in high heat capacity casting. Conventionally, the injection work has failed because the molten metal is infiltrated and solidified in the casting hole by using general silica sand or by mixing refractory material and graphite in the silica sand.

또한 내화물 분말 등은 용융고착(溶融固着)되거나, 또는 주형에 낙하되어 주입물의 재질을 저하시킬뿐 아니라, 주조물의 불량으로 폐기되는 경우도 있었다.In addition, the refractory powder or the like was melt-fixed or dropped into the mold to degrade the material of the injected material, and was sometimes discarded due to defective casting.

본 작업 공정은 주조물 형태에 따라 용탕종류, 주입온도, 주조공 개공시간등의 제조건에 따라 충진물은 주조공에서 용탕 상면으로 부상하거나 또는 충진물 전부가 완전 융착고화(融着固化)되어 주조공개폐 불능상태가 발생되며, 이때에는 산소 란스(oxygenlance)를 사용, 융착고화된 지금(地金)이나 충진물을 용융시켜 주조공을 개공(開孔)시켜 왔다. 충진물 용융작업은 매우 위험하고 주조물 제품의 재질을 더욱 악화시켜왔으나, 본원 발명은 이러한 결점을 완전 해결한 것으로서 첨부 도면에 의거 설명하면, 주조용탕 용기(1) 저부에 주조공(6)을 차단하여 주조량을 조정하는 주입밸브(Valve)(3)을 부착시켜 주입할때도 2에서와 같이 주조공(6)에 본원 발명 조성물을 충진시키면 본 발명 조성물은 용탕(2)에 의하여 표면융착대(7)가 생기고, 그 밑은 반융착대(8)를 형성하며, 그 저부는 원형질대(9)를 유지하여 이동판(11)의 주입게이트(Gate)(12)가 주조공(6)에 일치하면, 용강 정압과 저부 원형질대(9)의 이동에 의해서 조성물이 파괴되면서 주조공(6)에 충진되었던 본원 조성물은 용탕 하부로 낙하(4)된다.This work process depends on the type of casting, the injection temperature, the opening time of the casting process, and the filling material rises from the casting hole to the upper surface of the casting or all the fillings are completely fused and solidified. An incapacity condition occurs, and at this time, the casting hole has been opened by melting molten solids or fillers using an oxygen lance. Filling melting operation is very dangerous and has worsened the material of the cast product, the present invention is completely solved this defect as described according to the accompanying drawings, the casting hole (6) in the bottom of the molten metal container (1) by blocking When the injection composition (Valve) (3) for adjusting the casting amount is attached to the injection molding composition of the present invention in the casting hole (6) as shown in Figure 2, the composition of the present invention by the melt (2) ), The bottom of which forms a semi-fused zone (8), the bottom of which maintains the circular zone (9) so that the injection gate (Gate) 12 of the movable plate (11) coincides with the casting hole (6). When the composition is destroyed by the static steel static pressure and the movement of the bottom circular zone 9, the composition of the present invention, which has been filled in the casting hole 6, drops 4 to the lower side of the molten metal.

이와같은 용탕 유출방지 효과를 얻기 위하여 본원 조성물의 배합비 및 입도조건 시험을 해본 결과, 다음의 표 1, 표 2와 같은 각각의 결과를 얻었다.In order to obtain such an effect of preventing the outflow of the melt, the composition ratio and particle size conditions of the present composition were tested, and the following results were obtained in Tables 1 and 2, respectively.

[표 1]TABLE 1

성분 배합 시험 결과Ingredient combination test result

Figure kpo00001
Figure kpo00001

[표 2]TABLE 2

입도조성 시험결과Particle Composition Test Results

Figure kpo00002
Figure kpo00002

상기 시험조성물은 각각 850-1,500℃의 온도에서 각각 3시간 동안 소성하여 동일 조건으로 시험이 이루어진것으로서 성분 배합으로는 시험 C경우가 가장 양호하였고, 입도(조성 시험은 F의 경우가 가장 양호하여 주조 작업에 적합하였다. 이상과 같은 본원 조성물의 사용은 용융금속 즉 용탕이 1,500℃이상의 고온에서 사용되므로, 주성분인 SiO2는 고온에 용융되지 않는 물질로서 내열성을 갖고 있기 때문에 주조공(6)의 손상을 방지하게 되고 R2O는 표면융착대(7)및 반융착대(8)를 형성시켜 융착대(7)가 뚜껑(Cap)이 되면, 특히 응집력과 정압 때문에 본원 조성물이 용탕위로 부상되지 않아 용탕은 주조공(6) 내부로 침투하지 못하여 주입초기 주조공(6) 개공시 본원 조성물이 먼저 하부로 떨어지므로 용이하게 주조공(6)을 개공시킬 수 있다. R2O는 및 K2O의 산화물을 총칭하는 것으로써 광물에 혼존하는 비율은 일정치 않으며, 본원 용탕 유출방지 조성물에서는 그 성분범위가 1.5-2.5중량%가 적합하며, 이들중 K2O 또는 Na2O어느 성분이 증가 또는 감소되더라도 R2O로써 1.5-2.5중량%범위에서는 동일한 효과를 갖고 있다. 이들 각 성분의 함랴에 따라 개공율 변동 요인을 설명하면 내열성을 부여하는 SiO2를 주성분으로 하고, 표면융착대(7) 및 반융착대(8)를 형성시키도록 보조제와 R2O를 첨가하는 것으로서 SiO2: 93%,AL2O3: 2.5-4.0%, R2O : 1.5-2.5% 일때가 내열성을 유지하면서 표면융착대(7) 및 반융착대(8) 형성이 양호하며, SiO2: 90%, AL2O3: 5.0%, R2O : 3.0%, 흑연 : 2%이면, 용융이 실하여 용탕이 주조공(6) 내부로 침투하여 주조공(6) 개공율 77%로 떨어지고, SiO2: 88%, Al2O3: 2.4%, 내화분말 : 4.4%, 흑연 : 5.2%이면 더욱 내열성이 떨어져 주조공(6) 내부에 용강 침투가 심하여 개공율은 55%정도로 떨어진다. 통상 내화분말(몰탈등)이나 흑연은 주조시 주조공(6)보호제로 사용되는 성분들이나 이들은 융착대가 형성되지 않아 개공불량의 원인들이 되어 왔었다. 이에 반하여 SiO2의 주성분이 너무 많으면 표면융착대(7)및 반융착대(8)이 형성되지 않는다. 즉 SiO2: 96% Al2O3: 3% R2O : 2%이면 표면융착대(7)가 형성되지 않아 주조공(6)내에 투입된 본 조성물은 용량(2)위로 부상 본원 조성물의 사용효과를 상실하게 되어 주조공(6)을 보호치 못하고, 개공율은 84%로 하락하게 된다.The test composition was fired for 3 hours at a temperature of 850-1,500 ℃, respectively, and the test was carried out under the same conditions. The composition of the test was the best in case C, and the particle size (the composition test in the case of F was cast Since the use of the composition of the present invention is used at a high temperature of 1,500 ° C. or more, since the main component SiO 2 is a material that does not melt at high temperature, damage to the casting hole 6 is achieved. When R 2 O forms the surface fusion zone (7) and semi-fusion zone (8) and the fusion zone (7) is a cap (Cap), the composition of the present invention does not rise on the molten metal, especially because of cohesion and static pressure the molten Foundrymen 6 can be perforated to failure to penetrate into the injected initial Foundrymen 6 dogs disclosed herein, the composition state the first and diminish to lower easily tributary (6). R 2 O is and K 2 O Oxidation As a general term of water, the ratio of mixing in minerals is not constant. In the molten metal spill prevention composition of the present invention, the composition range is 1.5-2.5% by weight, and among them, K 2 O or Na 2 O is increased or decreased. Even though it has the same effect in the range of 1.5-2.5% by weight as R 2 O. The variation of the porosity rate according to the content of each of these components is mainly based on SiO 2 which gives heat resistance, and the surface fusion zone 7 and Auxiliaries and R 2 O were added to form the semi-fused zone 8, and the surface was maintained while maintaining the heat resistance when SiO 2 : 93%, AL 2 O 3 : 2.5-4.0%, R 2 O: 1.5-2.5% If the fusion zone (7) and semi-fusion zone (8) are formed well, and SiO 2 : 90%, AL 2 O 3 : 5.0%, R 2 O: 3.0%, graphite: 2%, the melt is sealed to melt It penetrates into the casting hole (6) and falls to the casting hole (6) opening rate of 77%, and more resistant to SiO 2 : 88%, Al 2 O 3 : 2.4%, refractory powder: 4.4%, graphite: 5.2%. This molten steel penetrates deeply into the casting hole 6, and the porosity falls to about 55%. In general, refractory powders (mortar, etc.) and graphite are components used as a casting hole (6) protection agent during casting, but these have not been formed fusion zones have been the cause of poor opening. On the other hand the main component of SiO 2 does not become too large, surface fusion for 7 and a half fused board (8) is formed. That is, when SiO 2 : 96% Al 2 O 3 : 3% R 2 O: 2%, the surface fusion zone (7) is not formed and the composition injected into the casting hole (6) is used above the capacity (2). The effect is lost and the casting hole 6 cannot be protected, and the opening rate falls to 84%.

즉, 본원 조성물은 SiO2: 93% Al2O3: 2.5-4.0%, R2O : 1.5-2.5%일때가 내열성을 유지하면서 표면융착대를 잘 형성시켜 주조공(6) 개공율이 100%로 유지할 수 있는 것은 시험결과(표 1)에 잘 설명시켜 주고 있다. 이상과 같이 본원 조성물의 사용효과를 설명하면 금속용탕이 주조공(6)에 침투되지 않고 용탕(2)에 의해 본 조성물의 상부층이 표면 융착대(7)및 반융착대(8)를 이뤄 덥게(Cap)와 같이 되면 응집력과 정압 때문에 부상되지 않아 주조공(6)을 완전 보호하므로, 주조공(6)손상도 방지되고 지금 융고로 인한 산소탄스(Oxygenlance)를 사용할 필요가 없어 공정지연도 없고, 작업능률도 상향되며 안전사고 예방은 물론, 이상과 같은 여러 요인이 비용도 절감시킬 수 있다. 또한 주조공(6)에 충진되었던 본원 조성물은 전부 하강되어 주조물에 불순물도 혼입되지 않아 품질면에서도 크게 향상된 매우 효과적인 발명이다.That is, the composition of the present invention forms a surface fusion zone while maintaining heat resistance when SiO 2 : 93% Al 2 O 3 : 2.5-4.0%, R 2 O: 1.5-2.5%, and thus the casting hole (6) porosity is 100. Keeping it in% is well explained in the test results (Table 1). As described above, when the use effect of the present composition is explained, the molten metal does not penetrate into the casting hole 6, and the upper layer of the composition forms the surface fusion zone 7 and the semi-fusion zone 8 by the molten metal 2. (Cap) is not injured due to cohesion and static pressure, so the casting hole (6) is completely protected, thus preventing damage to the casting hole (6) and eliminating the process delay because there is no need to use Oxygenlance due to melting. As a result, work efficiency can be improved and safety accidents can be prevented, and a number of factors can reduce costs. In addition, the present composition, which was filled in the casting hole (6) is a very effective invention that is greatly lowered in terms of quality since all the down is not mixed with impurities.

Claims (1)

SiO2: 93중량%, Al2O3: 2.5-4.0중량%, R2O : 1.5-2.5중량%의(단, R2O는 K2O및 Na2O의 총화임) 조성비로 혼합하여 적당한 온도로 가소하여 입도 2.0mm이상 : 5%이하, 1.0-2.0mm : 60-30%, 0.5-1.0mm : 30-60%, 0.5mm : 5%이하로 조성된 주조용기의 용탕유출방지 조성물.SiO 2 : 93% by weight, Al 2 O 3 : 2.5-4.0% by weight, R 2 O: 1.5-2.5% by weight (where R 2 O is a total of K 2 O and Na 2 O) Melting out of molten metal in a casting container with a particle size of 2.0mm or more: 5% or less, 1.0-2.0mm: 60-30%, 0.5-1.0mm: 30-60%, 0.5mm: 5% or less .
KR1019830001585A 1983-04-15 1983-04-15 Composition of check plug for outflow of molten metals Expired KR850001201B1 (en)

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