JPS591230B2 - Manufacturing method of casting nozzle - Google Patents
Manufacturing method of casting nozzleInfo
- Publication number
- JPS591230B2 JPS591230B2 JP54106264A JP10626479A JPS591230B2 JP S591230 B2 JPS591230 B2 JP S591230B2 JP 54106264 A JP54106264 A JP 54106264A JP 10626479 A JP10626479 A JP 10626479A JP S591230 B2 JPS591230 B2 JP S591230B2
- Authority
- JP
- Japan
- Prior art keywords
- zirconia
- casting
- casting nozzle
- nozzle
- manufacturing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000005266 casting Methods 0.000 title claims description 11
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 23
- 239000002994 raw material Substances 0.000 claims description 14
- 239000005350 fused silica glass Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 22
- 238000000034 method Methods 0.000 description 7
- 239000000377 silicon dioxide Substances 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 238000009749 continuous casting Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 229910000617 Mangalloy Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000004901 spalling Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000007582 slurry-cast process Methods 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- -1 zircon Chemical compound 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Continuous Casting (AREA)
Description
【発明の詳細な説明】
本発明は泥漿鋳込法によって鋳造用ノズルを製造する方
法において溶融石英とジルコニアが均一に分散した溶融
原料を用いて鋳込み成形し焼成して成る鋳造用ノズルの
製造方法に係るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention is a method for manufacturing a casting nozzle using a slurry casting method, in which a molten raw material in which fused quartz and zirconia are uniformly dispersed is cast and fired. This is related to.
従来連続鋳造法において使用される浸漬ノズルには溶融
石英質と黒鉛−アルミナ質ノズルが一般的に知られてい
る。Fused silica nozzles and graphite-alumina nozzles are generally known as submerged nozzles used in conventional continuous casting methods.
溶融石英質ノズルは珪石、珪砂などのシリカを主成分と
する石英質原料を１７００℃以上の温度で溶融し急冷す
ることによって得られる非晶質の溶融石英ガラスを出発
原料として用Ｇ）８メツシユ以下に粉砕したものと２０
ミクロン以下の粒度構成からなる泥漿とを混合鋳込み成
形後乾燥焼成して鋳造用ノズルが製造される。The fused silica nozzle uses amorphous fused silica glass as a starting material, which is obtained by melting silica raw materials mainly composed of silica such as silica stone and silica sand at a temperature of 1700°C or higher and rapidly cooling them. The following crushed and 20
A casting nozzle is manufactured by mixing the slurry with a slurry having a particle size of less than a micron, casting, molding, drying and firing.
溶融石英質ノズルは熱膨張率が小さく、熱伝導率が小さ
いために鋳造用ノズルとして使用した場合熱スポーリン
グに対して割れ難い特性とノズル閉塞し難い特色を有し
ている。Fused silica nozzles have a low coefficient of thermal expansion and low thermal conductivity, so when used as a casting nozzle, they have the characteristics of being resistant to cracking due to thermal spalling and resistant to nozzle clogging.
しかしながら製鋼用パウダーに対する耐食体に乏しくか
つ高マンガン鋼による耐食性が劣るために長時間の使用
に対して十分満足できるものになっていないのが現状で
ある。However, at present, it is not fully satisfactory for long-term use because it is poor in corrosion resistance against steelmaking powder and the corrosion resistance due to high manganese steel is poor.
一方黒鉛一アルミナ質ノズルについては耐酸化性に劣る
ために耐食性が劣りまた熱伝導率が高いためにノズル閉
塞し易い欠点がある。On the other hand, graphite-alumina nozzles have disadvantages in that they have poor oxidation resistance and therefore poor corrosion resistance, and that their high thermal conductivity tends to cause nozzle clogging.
黒鉛の酸化を防止する方法として低融性の酸化防止材を
塗布する方法、または基材配合に酸化防止可能な材料例
えば硼砂、ガラスなどを添加する方法が採用されている
がいずれも十分でない。Methods for preventing the oxidation of graphite include applying a low-melting antioxidant, or adding a material capable of preventing oxidation, such as borax or glass, to the base material formulation, but these methods are insufficient.
ノズル閉塞を防止する方法として使用前のノズルを使用
前に予熱する方法が採用されているが十分な効果が得ら
れていないのが現状である。As a method of preventing nozzle clogging, a method of preheating the nozzle before use has been adopted, but at present it is not sufficiently effective.
本発明はこれらの鋳造用ノズルの欠陥を補うために研究
を重ねた結果、溶融石英ガラス中にジルコニア結晶の微
粒子が均一に分散した状態の溶融原料を使用することに
よって耐食性、耐スポール性、ノズル閉塞に対して優れ
た効果を発見したものである。As a result of repeated research to compensate for the defects of these casting nozzles, the present invention has been developed to improve corrosion resistance, spall resistance, and nozzle performance by using a molten raw material in which fine particles of zirconia crystals are uniformly dispersed in fused silica glass. It has been discovered that it has an excellent effect on blockages.
ここでジルコニア結晶は微視的にみて微細で均一に分布
していることが望ましい。It is desirable that the zirconia crystals be microscopically fine and uniformly distributed.
本発明をさらに詳しく述べれば石英原料として珪石、珪
砂などのシリカを主成分とする原料とジルコン、パップ
イライトまたはジルコニア原料などジルコニアを含有す
る原料微粉を均一に混合しその混合物を１８００°Ｃ以
上の温度で溶融し急冷した原料を８メツシユ以下に粉砕
したものと、２０ミクロン以下の粒度構成からなる泥漿
とを混合混練して二次泥漿を製造し、鋳込み成形して９
００〜１４００°Ｃで焼成することを特徴とした鋳造用
ノズルの製造方法である。To describe the present invention in more detail, as a quartz raw material, raw materials mainly composed of silica such as silica stone and silica sand are uniformly mixed with raw material powder containing zirconia such as zircon, papillite or zirconia raw materials, and the mixture is heated at 1800°C or higher. A secondary slurry is produced by mixing and kneading raw materials melted and rapidly cooled at a temperature of 8 mesh or less with a slurry having a particle size of 20 microns or less, and then cast and molded into a 9-mesh slurry.
This is a method for manufacturing a casting nozzle characterized by firing at a temperature of 00 to 1400°C.
ここでジルコニアの含有量は３〜８５％の範囲が望まし
い。Here, the content of zirconia is preferably in the range of 3 to 85%.
ジルコニア含有量が重量比で５％未満では連鋳用パウダ
ー並び高マンガン鋼に対する耐食性が極度に低下し、重
量比で８５係を越えると耐スポール性に劣る。If the zirconia content is less than 5% by weight, the corrosion resistance against continuous casting powder and high manganese steel will be extremely reduced, and if it exceeds 85% by weight, the spalling resistance will be poor.
またノズル閉塞現象も顕著になるのでより好ましくはジ
ルコニア含有量は重量比で１５〜６０％の範囲が望まし
い。Furthermore, since the phenomenon of nozzle clogging becomes noticeable, the zirconia content is more preferably in the range of 15 to 60% by weight.
本発明において含まれるジルコニアの結晶形態は立方型
または単斜型のいずれにおいても前記効果は十分得られ
るものである。The above effects can be sufficiently obtained regardless of whether the crystal form of zirconia included in the present invention is cubic or monoclinic.
また場合によっては溶融石英原料と溶融石英−ジルコニ
ア溶融原料の二種原料を組合せて使用することも可能で
ある。In some cases, it is also possible to use a combination of two raw materials: a fused quartz raw material and a fused quartz-zirconia fused raw material.
本発明をさらに実施例に基づいて以下に説明する。The present invention will be further explained below based on Examples.
第１表は本発明に使用した二種の溶融石英−ジルコニア
質溶融原料の化学成分を示し第２表は第１表に示した原
料を鋳込み成形して１１００°Ｃの温度で焼成した製品
の配合と品質例を示す。Table 1 shows the chemical composition of the two types of fused silica-zirconia molten raw materials used in the present invention, and Table 2 shows the chemical composition of the two types of fused silica-zirconia molten raw materials used in the present invention. Examples of formulation and quality are shown.
第２表に示した鋳造用ノズルを連続鋳造用ノズルとして
従来品と比較して試用した結果、第２表に示したように
いずれのノズルも従来品の１．３〜１．９倍の耐用を示
し、本発明の効果を確認した。As a result of trial use of the casting nozzles shown in Table 2 as continuous casting nozzles in comparison with conventional products, all nozzles had a service life of 1.3 to 1.9 times that of conventional products, as shown in Table 2. The effect of the present invention was confirmed.
Claims (1)
コニア−溶融石英質の溶融原料を用いて、８メツシユを
通過する粒度に粉砕したものと、２０ミクロン以下の粒
度構成からなる泥漿とを混合し、鋳込み成形することを
特徴とする鋳造用ノズルの製造方法。1 Using a molten zirconia-fused silica raw material containing zirconia in a weight ratio of 5 to 85%, it is ground to a particle size that passes through 8 meshes, and mixed with slurry having a particle size composition of 20 microns or less. A method for producing a casting nozzle, which comprises casting and molding the casting nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54106264A JPS591230B2 (en) | 1979-08-21 | 1979-08-21 | Manufacturing method of casting nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54106264A JPS591230B2 (en) | 1979-08-21 | 1979-08-21 | Manufacturing method of casting nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5632372A JPS5632372A (en) | 1981-04-01 |
| JPS591230B2 true JPS591230B2 (en) | 1984-01-11 |
Family
ID=14429229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54106264A Expired JPS591230B2 (en) | 1979-08-21 | 1979-08-21 | Manufacturing method of casting nozzle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS591230B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01301558A (en) * | 1987-12-05 | 1989-12-05 | Mitsubishi Mining & Cement Co Ltd | Production of sintered magnesia |
| US5900381A (en) * | 1997-08-26 | 1999-05-04 | General Electric Company | Opaque silica composition |
-
1979
- 1979-08-21 JP JP54106264A patent/JPS591230B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5632372A (en) | 1981-04-01 |
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