KR100201161B1 - Method for manufacturing mould - Google Patents
Method for manufacturing mould Download PDFInfo
- Publication number
- KR100201161B1 KR100201161B1 KR1019960038172A KR19960038172A KR100201161B1 KR 100201161 B1 KR100201161 B1 KR 100201161B1 KR 1019960038172 A KR1019960038172 A KR 1019960038172A KR 19960038172 A KR19960038172 A KR 19960038172A KR 100201161 B1 KR100201161 B1 KR 100201161B1
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- KR
- South Korea
- Prior art keywords
- mold
- sio
- blast furnace
- self
- added
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
본 발명은 규사등 내화물 입자를 골재로하여 점결제로서 규산소오다 용액을 첨가한 주형재료에 경화제를 첨가하여 교반, 성형 및 급경화하여 주형의 강도를 증대시키는 자경성 주형 제조법에 관한 것으로, 경화제로서 2CaO · Al2O3· SiO2를 주성분으로 하되 중량비로 CaO : 30~60%, SiO2: 10~35%, Al2O3: 10~20%, MnO : 5~20%로 조성되는 고로슬랙을 가공 처리한 분말을 규산소오다 용액에 대하여 10~80% 첨가함을 특징으로 한다.The present invention relates to a process for producing a self-hardening mold which increases the strength of a mold by adding a curing agent to a mold material prepared by adding refractory particles such as silica sand as an aggregate, as, but mainly composed of 2CaO · Al 2 O 3 · SiO 2 ratio by weight in CaO: 30 ~ 60%, SiO 2: 10 ~ 35%, Al 2 O 3: 10 ~ 20%, MnO: that is the composition of 5 to 20% And the blast furnace slack processing powder is added in an amount of 10 to 80% based on the oxygen silicate solution.
Description
본 발명은 제철소의 제선공정에서 부산물로 생성되는 고로슬랙을 가공처리한 분말을 사용하여 주형을 제조하는 것으로, 규사를 골재로하여 점결제로서 규산소오다 용액을 사용하는 주형에 고로슬랙분말을 첨가 교반하여 성형, 급경화 하는 것을 특징으로 하는 주형제조법에 관한 것이다.The present invention relates to a process for producing a mold by using powder obtained by processing a blast furnace slag produced as a by-product in a steelmaking process, wherein a blast furnace slag powder is added to a mold using a silica- And then the mixture is molded and cured by stirring.
고로슬랙분말이라 함은 여러 가지 광물들이 제선공정에서 부산물로 생성되는 슬랙을 가공처리하여 주조용 자경성 주형재료로서 공업적으로 이용하는 것이다. 이렇게 제선공정에서 생성되는 생성물은 사용원료 성분범위에 따라 5CaO · 2SiO2, 5CaO · Al2O3, CaO · FeO · SiO2, 2CaO · Al2O3· SiO2, 3CaO · MgO · SiO2, 2CaO · MgO · SiO2, CaO · MgO · SiO2, 3MgO · Al2O3· 3SiO2기타 많은 화합물들의 혼합체를 각각 주성분으로 존재하나 이들중 본 발명에서 주성분으로 하는 2CaO · Al2O3· SiO2는 고온에서 대기중에 유출냉각 도중 분화하는 화합물로서 CaO/SiO2의 비가 1 : 4이상으로 되어야 하고 Al2O3의 함유율은 10~20% 범위에 속하는 것이다.The blast furnace slag powder is used industrially as a self-hardening casting material for casting by processing various minerals slack produced as a by-product in the milling process. Thus the product produced in the iron making process is 5CaO · 2SiO 2 depending on the ingredients range, 5CaO · Al 2 O 3, CaO · FeO · SiO 2, 2CaO · Al 2 O 3 · SiO 2, 3CaO · MgO · SiO 2, 2CaO · MgO · SiO 2, CaO · MgO · SiO 2, 3MgO · Al 2 O 3 · 3SiO 2 many other one of which the presence of a mixture to each main component of the compound in the present invention as a main component 2CaO · Al 2 O 3 · SiO 2 is a compound that differentiates during outflow cooling at high temperature in the atmosphere at a high temperature, and CaO / SiO 2 ratio should be 1: 4 or more, and Al 2 O 3 content is in the range of 10 to 20%.
본 발명에서 주형용 자경성 주형재료로서 사용되는 경화제는 2CaO · Al2O3· SiO2를 주성분으로 하는바, 이들의 화학조성 및 입도분포는 다음과 같다.In the present invention, the curing agent used as the self-hardening mold material for casting is mainly composed of 2CaO.Al 2 O 3 .SiO 2 , and their chemical compositions and particle size distributions are as follows.
본 발명의 주형제조를 위한 사용 주물사의 배합비를 표시하면 다음과 같다.The mixing ratio of the molding sand used for producing the mold of the present invention is as follows.
상기의 원료들 용도에 따라 적당한 배합비로 혼련기에서 교반하여 조형한 후 상온에 방치하면 경화하게 된다. 이때 규산소오다의 용액은 온도의 변화에 따라 경화상태가 다르므로 조정 사용해야 한다.The raw materials are agitated in a kneader at an appropriate blending ratio according to the use of the raw materials, and then molded at room temperature to be cured. At this time, the solution of silicon dioxide should be adjusted and used because the curing state differs depending on the temperature.
고로 슬랙분말은 물과 반응하여 수화물의 생성을 촉진하여 주물사의 경화를 조장시키고 주형의 후기강도를 증대시키게 되는데 그 이유로서는 수화물의 생성반응이 Al 이온인 다가 양이온의 존재에 의하여 영향을 받아 결과적으로 겔화를 촉진하기 때문이다.The blast furnace slag powder reacts with water to promote the formation of hydrates, thereby promoting the hardening of the foundry sand and increasing the late strength of the casting, Ion, and as a result, gelation is accelerated.
규산소오다 용액과 슬랙 분말의 경화반응은 다음과 같다.The curing reaction of the sliver powder and the silicon oxyde solution is as follows.
상기 반응으로 인하여 2CaO · Al2O3· SiO2의 수화반응과 일부의 분해 반응으로 Ca2+, Al3+및 실리카 졸을 형성하고 이들이 규산소오다 반응(3)에서 겔화촉진을 하여 주형의 경화가 진행되는 것으로 추정된다.Due to the reaction, Ca 2+ , Al 3+ and silica sol are formed by hydration and partial decomposition of 2CaO · Al 2 O 3 .SiO 2 , and they promote gelation in the silicon oxyde reaction (3) It is presumed that curing proceeds.
이하 본 발명을 실시예에 의하여 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the following examples.
[실시예][Example]
규사(AFS GFN 71.7) 100%에 규산소오다(몰비 2.5%) 용액 6%, 가공처리한 고로슬랙분말 50%를 혼련기에서 교반하여 자경성 주물사로서 이를 사용하여 주형을 제조한다. 상기 실시예의 자경성 주물사로서 표준시험편을 성형한 후 실온에 방치하여 압축강도를 시험한 결과는 다음과 같다.6% of a solution of silica oxygenated (2.5% by mole) in 100% of silica sand (AFS GFN 71.7) and 50% of processed blast furnace slag powder are stirred in a kneader to prepare a mold using this as a self-hardening molding sand. The result of the test of the standard test piece as the self-hardening casting yarn of the above example, and the result of the compression strength test after being left at room temperature is as follows.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960038172A KR100201161B1 (en) | 1996-09-04 | 1996-09-04 | Method for manufacturing mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960038172A KR100201161B1 (en) | 1996-09-04 | 1996-09-04 | Method for manufacturing mould |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR19980019918A KR19980019918A (en) | 1998-06-25 |
| KR100201161B1 true KR100201161B1 (en) | 1999-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019960038172A KR100201161B1 (en) | 1996-09-04 | 1996-09-04 | Method for manufacturing mould |
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| Country | Link |
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| KR (1) | KR100201161B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100677159B1 (en) | 2004-12-15 | 2007-02-02 | 삼성전자주식회사 | Method and apparatus for performing external device's diagnostics function in host computer |
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1996
- 1996-09-04 KR KR1019960038172A patent/KR100201161B1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR19980019918A (en) | 1998-06-25 |
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