KR860001760B1 - Refractory casterble - Google Patents
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- KR860001760B1 KR860001760B1 KR8204292A KR820004292A KR860001760B1 KR 860001760 B1 KR860001760 B1 KR 860001760B1 KR 8204292 A KR8204292 A KR 8204292A KR 820004292 A KR820004292 A KR 820004292A KR 860001760 B1 KR860001760 B1 KR 860001760B1
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- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/06—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on oxide mixtures derived from dolomite
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/6303—Inorganic additives
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- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/02—Linings
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- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
- C04B35/481—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates containing silicon, e.g. zircon
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0087—Uses not provided for elsewhere in C04B2111/00 for metallurgical applications
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
Abstract
Description
제1도는 내화 캐스터블의 알미나 함유량과 내화 캐스터블의 용도온도(溶倒溫度)와의 관계도.1 is a relationship between the alumina content of the refractory castable and the application temperature of the refractory castable.
본 발명은 용선(溶銑)이나 용강(溶鋼)과 같은 고온의 용탕(溶湯)을 이동한다던가 반응처리 하기 위하여 수용하는 용기, 일반적으로 포트라고 일컫는 용기의 내면에 라이닝하기 위하여 사용하는 내화 캐스터블의 성분구성을 개량힘에 관한 것으로 포트내의 용융슬럭 및 용강등에 대하여 내식성(耐食性)이 강하며 또한 가열한다거나 냉각할때의 열 사이클에 대하여 내열적 스포올링에 우수한 내화캐스터블을 제공하는 것을 목적으로 한다.The present invention is a component of a refractory castable used for lining the inner surface of a container which is accommodated for moving or reacting a high temperature molten metal such as molten iron or molten steel, or a container generally called a pot. The present invention relates to an improvement in construction, and to provide a fire resistant castable having excellent corrosion resistance against molten slugs and molten steel in the pot, and excellent thermal spraying against heat cycles during heating or cooling.
근년에 와서 포트를 라이닝하길 위한 내화재에는 부정형 내화물에 결합재(結合材), 해교재(解膠劑), 응고제, 경화재, 건조촉진제 등의 첨가물과 6-8%의 물을 첨가하고 로울러로 혼합하여 유입(流
이들 내화 캐스터블을 유입 시공하는 잇점은 시공의 기계화로 노력을 덜어주며 작업환경의 개선 및 부분적으로 메워넣는 보수를 용이하게 할 수 있는 것들이다.The advantages of injecting these fireproof castables are those that can save effort due to mechanization of the construction, and can improve the work environment and facilitate the partial filling.
포트에 라이닝용인 내화 캐스터블은 주원료로서 규산질, 규산-지르콘질, 지르콘질 등이 일반적으로 사용되며 그것들의 결합재로서는 알루미나 시멘트를 사용하는 수경성(水硬性) 캐스터블 내회물과 목절점토(木節粘土), 카올린 등의 미분(微粉)내화점토를 사용하는 점토 결합캐스터블 내화물이 있다.Refractory castables for lining in pots generally include siliceous, silicic acid-zirconium, and zirconium as the main raw materials, and hydraulic binders made of alumina cement are used as their binders. Clay-linked castable refractory material using fine refractory clay such as kaolin).
이 중에서 수경성 캐스터블을 결합재인 알루미나 시멘트를 보통 10중량% 아니면 그 이상 첨가하기 때문에 사용할 때에는 1200℃ 이상의 고온도 범위에 있어서의 열간(熱間)특성이 뒤떨어지며 나아가서 800-1000℃의 중간 온도범위에서는 탈수로 강도가 현저히 뒤떨어지게 된다고 하는 결점이 있을뿐 아니라 특히 규산(실리카, SiO2)을 주성분으로 하는 포트용 캐스터블의 경우는 Al2O3의 량이 지나쳐서 용융온도가 현저히 저하하기 때문에 이런 종류의 용도에는 적당하지 않다.Among them, alumina cement, which is a binder, is usually added in an amount of 10% by weight or more, so that the hot characteristics in the high temperature range of 1200 ° C or higher are inferior, and the intermediate temperature range of 800-1000 ° C is further increased. In addition to the drawbacks of deterioration in strength due to dehydration, especially for pot castables containing silicate (silica, SiO 2 ) as the main component, the amount of Al 2 O 3 is excessive and the melting temperature is significantly lowered. Not suitable for use.
또 점토결합 캐스티블은 응교제로서의 알루민산칼슘, 수산화칼슘, 주원료로서의 규산질원료, 지르콘 및 내화점토 등으로부터 오는 Al2O3및 CaO이 규산을 주성분으로 하는 포트용 내화 캐스터블에 저용성(低融性)물질을 생성하게 되므로 대(對)용손성(溶損性)이 저하하고 또 수열면(受熱面)에 있어서의 소결성(燒結性)이 강하여지기 때문에 장기간에 걸쳐서 가열·냉강을 반복하여 열사이클을 받으면 자주 박리손상을 일으켜서 포트의 사용 수명을 저하하게 하고 있다.In addition, clay-bonded castables are lowly soluble in fire-resistant castables for pots containing Al 2 O 3 and CaO from silicic acid as a coagulant, calcium silicate as a main raw material, zircon and refractory clay, etc. Since the formation of a soluble substance decreases the resistance to damage and the sintering property on the heat-receiving surface becomes stronger, the heat and cold steel are repeatedly heated for a long time. The cycle often causes peeling damage, which reduces the service life of the pot.
본 발명은 실리카를 주성분으로 하는 포트의 라이닝용 내화캐스터블에 있어서의 전기한 결점을 해소하는 것으로 그 요지는 규산질 원료와 지르콘으로부터 형성되는 내화골재에 알루미나 시멘트를 첨가하는 내회캐스터블에서 알루미나(Al2O3)의 함유량이 전체의 5.0-1.0중량%임을 특징으로 하는 포트라이닝용 내화 캐스터블이라고 함에 있다.The present invention solves the above-mentioned drawback in the refractory castable for lining of a silica-based pot. The gist of the present invention is that alumina (Al is used in the refractory castable which adds alumina cement to the refractory aggregate formed from siliceous raw material and zircon. 2 O 3 ) is a refractory castable for pot lining, characterized in that the content is 5.0-1.0% by weight of the whole.
다음에 본 발명의 성분구성에 대하여 설명한다. 본 발명에서 사용하는 규산질원료는 규사, 규석, 납석 및 무정형 실리카이며, 입경(粒俓)이 6.0mm 이하인 골재이다. 지르콘(ZrsiO4)의 주체는 0.3mm 이하의 미분이지만, 고(高)지르콘질의 것은 최대입경 6.0mm 이하인 것을 사용한다. 도 알루미나 시멘트는 일반시판품으로서 예컨대 알코올, 알루코우어 CA-25, 전화(電化)하이알루미나 스으파아, 세카아르 250 및 JIS R 2511으로 정하는 1종 2종인 알루미나 시멘트 등이다.Next, the component structure of this invention is demonstrated. The siliceous raw materials used in the present invention are silica sand, silica, leadstone and amorphous silica, and are aggregates having a particle diameter of 6.0 mm or less. The main part of zircon (ZrsiO 4 ) is a fine powder of 0.3 mm or less, but the one of high zirconium has a maximum particle size of 6.0 mm or less. The alumina cement is a commercially available product such as alcohol, alumino CA-25, inverted high alumina squafa, secaar 250, and alumina cements of 1 type and 2 types specified in JIS R 2511.
본 발명의 알루미나 시멘트의 첨가비율은 내화물골재 100에 대하여 0.5-2.0중량%가 바람직하다. 이것은 후술하는 바와같이 캐스터블 내화물 전체의 알루미나의 함유량을 저감시키기 위한 것이며, 0.5중량% 이하에서는 내화 캐스터블을 시공한 다음의 경화시간이 길어져서 포트를 조업(操業)함에 지장을 초래한다. 또 2.0중량% 이상 첨가하면 CaO 및 Al2O5이 증가하여 내화 캐스터블이 저융성에 치우게되어 고온범위에서의 소결이 지나치게 강하여져서 바람직하지 않다.The addition rate of the alumina cement of the present invention is preferably 0.5 to 2.0% by weight based on the refractory aggregate 100. This is to reduce the alumina content of the entire castable refractory as described below, and at 0.5 wt% or less, the curing time after the construction of the refractory castable becomes long, which causes trouble in operating the pot. Also the addition of more than 2.0% by weight increases the CaO and Al 2 O 5 by the refractory castable to the biased in that the rise is undesirable so that sintering at a high temperature range is too strong.
그래서 규산을 주성분으로 하는 본 발명의 가장 중요한 점은 출발원료인 규산질골재, 지르콘 및 내화점토, 알루미나 시멘트의 화학성분의 총량 중에서 알루미나(Al2O3)의 함유량이 5.0-1.0중량%로 되도록 배합해야 한다는 사실이다.Therefore, the most important point of the present invention, which is based on silicic acid, is blended so that the content of alumina (Al 2 O 3 ) is 5.0-1.0% by weight in the total amount of the chemical components of the siliceous aggregate, zircon, refractory clay, and alumina cement as starting materials. It is a fact.
제1도에서 규산-지르콘 계열의 캐스터블 내화물에 있어서의 알루미나(Al2O3)의 함유율이 용도온도에 주는 영향을 나타낸다. 즉, Al2O3함유율의 증가에 따라서 캐스터블 내화물의 용도온도가 현저히 저하한다는 사실을 알 수 있다. 용도온도가 저하함에 따라서 포트의 사용중의 용손(溶損)을 크게 하고 또 소결수 축으로 균열이 발생하며, 박리현상이 발생하는 원인으로 된다. 더우기 용도온도는 JIS R 2204에 준하고 시험코운의 선단이 수대(受臺)에 접촉힐때의 온도를 측정하였다.Fig first silicate in - the content of alumina (Al 2 O 3) in the castable refractory zircon series shows the effect on the application temperature. In other words, it can be seen that the application temperature of the castable refractory decreases remarkably with increasing Al 2 O 3 content. As the use temperature decreases, the melt loss during use of the pot increases, cracks occur in the shrinkage shrinkage, and peeling occurs. Furthermore, the application temperature was measured in accordance with JIS R 2204 and the temperature when the tip of the test cone was in contact with several bands.
다음으로 알루미나 함유량은 배합량속의 알루미나 시멘트의 최저 필요량과 내화골재 등에 함유되는 Al2O3을 고려하여 하한치로 1.0중량%이 필요하며 또 5.0중량%를 초과하면 포트를 라이닝하는 내화물로서의 용도온도를 확보할 수 없으므로 상한치를 5.0중량%로 하였다.Next, the alumina content requires 1.0% by weight as the lower limit in consideration of the minimum required amount of alumina cement in the blended amount and Al 2 O 3 contained in the refractory aggregate, and if it exceeds 5.0% by weight, the application temperature as a refractory lining the pot is secured. Since it was not possible, the upper limit was made into 5.0 weight%.
더우기 본 발명의 내화 캐스터블에는 시공할때의 유동성을 증가시키기 위한 해교제로서 인산나트륨, 아민산 나트륨을 첨가하며 알루미나 시멘트의 경화촉진제로서 수산화칼슘, 그렇지 않으면 건조촉진제로서 금속알루미늄 등을 소량만큼 첨가하는 것은 시공성의 개선 및 경화, 건조를 촉진하기 위하여 효과적이다.Furthermore, in the refractory castable of the present invention, sodium phosphate and sodium amine acid are added as a peptizing agent to increase fluidity during construction, and calcium hydroxide as a curing accelerator of alumina cement, or a small amount of metal aluminum as a drying accelerator is added. It is effective in order to improve workability and to promote hardening and drying.
제1표는 본 발명의 실시예와 종래의 내화점토 결합 내화캐스터블의 배합표로서 그것들의 화학성분, 여러가지 물성 및 포트에 있어서의 실용성적표를 뜻한다. 제2표는 그것들의 각 내화 캐스터블에 사용한 사용원료 등의 화학분석표이다.The first table is a compounding table of the examples of the present invention and the conventional refractory clay-linked refractory castables, and means the practicality tables in their chemical components, various physical properties, and pots. The second table is a chemical analysis table of the raw materials used for each of these refractory castables.
[제1표][Table 1]
[실시예]EXAMPLE
[제2표][Table 2]
사용원료의 화학분석표(중량 %)Chemical analysis table of the raw materials (weight%)
실시예 1은 지르콘 70중량%를 배합한 규석-지르콘질 내화 캐스터블이지만 알루미나의 첨가량은 1.0중량%로서 내화 캐스터블 전체의 Al2O3함유량은 1.6중량%와 종래의 내화점도(粘度)결합한 것은 1/3 이하이며 따라서 그 용도온도가 1780℃ 만큼이나 높고 또 가열한 다음의 여러가지 물성으로부터 판단되는 바와같이 종래의 내화 캐스터블에 비하여 매우 소결하기 어려운 캐스터블이다. 250t들이 용강포트에서의 실지로 사용하였던 결과를 보면 균열, 박리의 발생은 거의 없고 사용수명은 종래의 캐스터블의 약 2배인 100차아지 이었다.Example 1 is a silica-zirconic refractory castable containing 70 wt% of zircon, but the addition amount of alumina is 1.0 wt%, and the Al 2 O 3 content of the entire refractory castable is 1.6 wt% combined with the conventional refractory viscosity. It is 1/3 or less, and therefore, its use temperature is as high as 1780 ° C and it is castable which is very difficult to sinter as compared with the conventional refractory castable as judged from various physical properties after heating. As a result of using 250 tons in the molten steel pot, cracks and peelings were hardly generated and the service life was about 100 charges, which is about twice that of a conventional castable.
실시예 2는 마찬가지로 지르콘 70중량%의 규석-지르콘질 내화캐스터블이며, 내화 점도의 첨가량을 실시예 1의 3배, 알루미나 시멘트의 첨가량을 1.5배로 하였기 때문에 Al2O3의 전체 함유량이 2.9중량%로 되었으나 용도온도는 20℃로 저하하였으며 물성으로부터 보아서 소결성은 약간 증가하였으나 용강포트에 있어서의 실지상용에서는 내식성도 양호하여 평균 사용회수 65 차아지나 되는 좋은 성적이 있다.Example 2 is likewise a silica-zirconic refractory castable of 70% by weight of zircon, and the total content of Al 2 O 3 is 2.9 weight because the addition amount of the refractory viscosity is three times that of Example 1 and the addition amount of alumina cement is 1.5 times. Although the application temperature was lowered to 20 ℃ and the sinterability was slightly increased from the physical properties, the corrosion resistance was good in the actual use in the molten steel pot, and the average number of uses was 65.
실시예 3은 지르콘 70중량%의 납석-지르콘질 내화 캐스터블로서 납석골재로 부터의 Al2O3부가(付加)와 알루미나 시멘트의 1.0중량% 첨가에 따라서 전체 al2O3함유량은 3.8%나 증가하고 있으나 250t 용강 포트에서의 사용결과는 내식성, 균열, 박리의 정도가 종래의 납석-지르콘질 점토결합 캐스터블에 비하여 양호하였다. 그러나 일부에 균열, 박리한 것이 확인되었으며 평균 사용수명은 62 차아지와 실시예 1보다 단명이긴 하지만 실용상 충분히 사용할 가치있는 것이었다.Example 3 is a 70% by weight of zircon, a feldspar-zirconic refractory castable, the total al 2 O 3 content is 3.8% according to the addition of Al 2 O 3 from the feldspar aggregate and 1.0% by weight of alumina cement. Increasingly, however, the 250t molten steel pot has better corrosion resistance, cracking, and peeling than the conventional lead-zirconic clay-bonding castable. However, some cracks and peelings were confirmed, and the average service life was shorter than that of 62 charges and Example 1, but it was worthy of practical use.
이상에서 상세히 설명한 바와같이, 규산을 주성분으로 하는 내화 캐스터블에 있어서의 용도온도가 내식성과 균열, 박리, 나아가서는 포트의 사용수명에 미치는 영향 및 용도온도와 Al2O3함유량과의 상관관계에 대한 식견에 따라서 내화 캐스터블 속의 전체 알루미나 함유량을 제한함에 따라 종래까지 달성할 수 없었던 수명이 긴 즉, 종래의 내화점토 결합 내화 캐스터블의 대락 2배 가까운 사용수명의 포트 라이닝용 내화 캐스터블을 얻을 수 있었다.As described in detail above, the effect of the application temperature in the refractory castable containing silicic acid as a main component on the corrosion resistance, cracking, peeling, and the service life of the pot, and the relationship between the application temperature and the Al 2 O 3 content As a result of this study, by limiting the total alumina content in the refractory castable, a fireproof castable for pot lining, which has a long service life that has not been achieved conventionally, that is almost twice as long as a conventional refractory clay-bonded refractory castable, can be obtained. Could.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP81-149310 | 1981-09-24 | ||
| JP56149310A JPS6049156B2 (en) | 1981-09-24 | 1981-09-24 | Fireproof castable for ladle lining |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR840001532A KR840001532A (en) | 1984-05-07 |
| KR860001760B1 true KR860001760B1 (en) | 1986-10-21 |
Family
ID=15472326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR8204292A KR860001760B1 (en) | 1981-09-24 | 1982-09-23 | Refractory casterble |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS6049156B2 (en) |
| KR (1) | KR860001760B1 (en) |
| DE (1) | DE3235244A1 (en) |
| EG (1) | EG16012A (en) |
| FR (1) | FR2513242A1 (en) |
| GB (1) | GB2106888B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5039345A (en) * | 1988-04-05 | 1991-08-13 | Advanced Metals Technology Corp. | Fiber composite article and method of manufacture |
| US4921222A (en) * | 1988-04-05 | 1990-05-01 | Advanced Metals Technology Corp. | Fiber composite article and method of manufacture |
| US5880404A (en) * | 1996-06-28 | 1999-03-09 | Advanced Metals Technology Corporation | Power transmission support structures |
| FR3059998B1 (en) * | 2016-12-14 | 2022-07-15 | Saint Gobain Ct Recherches | ZIRCON-BASED SINTERED CONCRETE |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE756874A (en) * | 1969-10-08 | 1971-03-01 | Prost Sa | REFRACTORY COMPOSITIONS WITH HYDRAULIC TAP |
| JPS5454118A (en) * | 1977-10-07 | 1979-04-28 | Nippon Steel Corp | Stamp material for molten metal vessel |
-
1981
- 1981-09-24 JP JP56149310A patent/JPS6049156B2/en not_active Expired
-
1982
- 1982-09-17 GB GB08226566A patent/GB2106888B/en not_active Expired
- 1982-09-22 EG EG576/82A patent/EG16012A/en active
- 1982-09-22 FR FR8215949A patent/FR2513242A1/en active Granted
- 1982-09-23 DE DE19823235244 patent/DE3235244A1/en active Granted
- 1982-09-23 KR KR8204292A patent/KR860001760B1/en active Pre-grant Review Request
Also Published As
| Publication number | Publication date |
|---|---|
| GB2106888B (en) | 1985-06-05 |
| KR840001532A (en) | 1984-05-07 |
| GB2106888A (en) | 1983-04-20 |
| DE3235244A1 (en) | 1983-04-07 |
| DE3235244C2 (en) | 1987-11-19 |
| EG16012A (en) | 1986-09-30 |
| FR2513242A1 (en) | 1983-03-25 |
| JPS5855379A (en) | 1983-04-01 |
| JPS6049156B2 (en) | 1985-10-31 |
| FR2513242B1 (en) | 1985-05-24 |
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Free format text: OPPOSITION NUMBER: 001986001383; OPPOSITION DATE: 19861220 |