GB2135918A - Pouring tube for casting steel - Google Patents
Pouring tube for casting steel Download PDFInfo
- Publication number
- GB2135918A GB2135918A GB08334549A GB8334549A GB2135918A GB 2135918 A GB2135918 A GB 2135918A GB 08334549 A GB08334549 A GB 08334549A GB 8334549 A GB8334549 A GB 8334549A GB 2135918 A GB2135918 A GB 2135918A
- Authority
- GB
- United Kingdom
- Prior art keywords
- outlet
- delivery outlet
- inner part
- refractory
- deposits
- 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.)
- Granted
Links
- 238000005266 casting Methods 0.000 title claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 title claims description 15
- 239000010959 steel Substances 0.000 title claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 22
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000002131 composite material Substances 0.000 claims abstract description 11
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 11
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 11
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 11
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 11
- 238000009825 accumulation Methods 0.000 claims abstract description 9
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 9
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 9
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 9
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 9
- 239000007787 solid Substances 0.000 claims abstract description 7
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 5
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 5
- 238000009749 continuous casting Methods 0.000 claims description 12
- 230000035508 accumulation Effects 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 230000009970 fire resistant effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000011819 refractory material Substances 0.000 claims description 4
- 229910004709 CaSi Inorganic materials 0.000 claims description 2
- 229910020489 SiO3 Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 150000004645 aluminates Chemical class 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims description 2
- 239000011230 binding agent Substances 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000008021 deposition Effects 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims description 2
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
- B22D41/50—Pouring-nozzles
- B22D41/52—Manufacturing or repairing thereof
- B22D41/54—Manufacturing or repairing thereof characterised by the materials used therefor
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Continuous Casting (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Mold Materials And Core Materials (AREA)
- Ceramic Products (AREA)
- Furnace Charging Or Discharging (AREA)
Abstract
A composite delivery outlet (1) for casting plant has an inner lining (2) made of magnesium oxide, to prevent the accumulation of solid oxide deposits. An outer layer (3) of a refractory oxide such as Al2O3 or SiO2 is provided to strengthen the outlet, the two layers being spaced by an air gap (4). <IMAGE>
Description
SPECIFICATION
Delivery outlet for continuous casting plant
The invention concerns a delivery outlet for continuous casting plant made of a refractory material which prevents the accumulation of solid oxide deposits.
In the continuous casting of steel delivery outlets are used which consist essentially of one or more fire-resistant oxides (Al203, SiO2), carbon (graphite) and a binding agent. In these outlets alumina deposits form on the inner walls and cause a diminution of the internal diameter of the outlet, which results in a reduction in the speed of flow.
Moreover, pieces of alumina broken off from these deposits form inclusions which impair the finished steel.
A known method of prevention (DE-OS 27 31 367) is to add Ca or CaSi alloys to the molten steel in order to prevent the deposition of alumina particles in the delivery outlet. In this way the Awl203 particles resulting from an aluminium treatment are modified, i.e. they are converted to a liquid form (Ca aluminates).
This procedure is not always successful. It is also laborious and costly. Finally it does not take account of the fact that in delivery outlets of Awl203 or SiO3 deposits or accumulations form on the internal wall as a result of reactions between the refractory mass of the outlet, alumina or silicon dioxide as the molten steel.
The invention has a purpose of proposing a delivery outlet for continuous casting plant in which accumulations of solid oxide phases are prevented.
According to the invention this is achieved by making the inner part of the outlet which comes into contact with the molten steel of magnesium oxide.
It is expedient to surround the inner part of the outlet with a layer of refractory oxides commonly used in outlets, such as At203 or SiO2.
In accordance with a further development of the invention an air gap is provided between the inner part and the layer surrounding it.
The essential advantage to be obtained by the invention is that by a simple expedient the disruptive deposits on the inner walls of delivery outlets are prevented and thus the disadvantages mentioned earlier are not suffered.
The drawing shows an example of the application of the invention.
The inner part (2) of the delivery outlet (1), the part which comes into contact with the molten steel, is made of magnesium oxide (MgO). It has proved expedient to surround the inner part (2) with a layer (3) of known refractory oxides such as for example
Al203, SiO2 or another suitable fire-resistant material. In this way the delivery outlet (1) is sufficiently durable in spite of the not very good mechanical strength of MgO.
If the coefficients of expansion of the inner part (2) and the outer layer (3) are very different it is appropiate to provide an air gap (4).
Tests have shown that surprisingly the delivery outlet described remains clean in its inner part (2), so that casting can continue at a constant speed.
1. A composite delivery outlet for continuous casting plant, made of a refractory material, wherein the inner part of the outlet, which comes into contact with the molten steel, is made of magnesium oxide to prevent the accumulation of solid oxide deposits.
2. A composite delivery outlet in accordance with Claim 1, wherein the said inner part of the outlet is surrounded by a layer of a refractory oxide or oxides.
3. A composite delivery outlet in accordance with Claim 2 wherein the surrounding refractory oxide layer comprises A1203 and/or SiO2.
4. A composite delivery outlet in accordance with Claim 2 or Claim 3, wherein an air gap is provided between the inner part and the surrounding refractory oxide layer.
5. A composite delivery outlet for continuous casting plant, substantially as herein described with reference to the acompanying drawing.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (5)
1. A composite delivery outlet for continuous casting plant, made of a refractory material, wherein the inner part of the outlet, which comes into contact with the molten steel, is made of magnesium oxide to prevent the accumulation of solid oxide deposits.
2. A composite delivery outlet in accordance with Claim 1, wherein the said inner part of the outlet is surrounded by a layer of a refractory oxide or oxides.
3. A composite delivery outlet in accordance with Claim 2 wherein the surrounding refractory oxide layer comprises A1203 and/or SiO2.
4. A composite delivery outlet in accordance with Claim 2 or Claim 3, wherein an air gap is provided between the inner part and the surrounding refractory oxide layer.
5. A composite delivery outlet for continuous casting plant, substantially as herein described with reference to the acompanying drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3300166A DE3300166C2 (en) | 1983-01-05 | 1983-01-05 | Multi-part immersion nozzle for continuous casting plants |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8334549D0 GB8334549D0 (en) | 1984-02-01 |
| GB2135918A true GB2135918A (en) | 1984-09-12 |
| GB2135918B GB2135918B (en) | 1986-02-19 |
Family
ID=6187742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08334549A Expired GB2135918B (en) | 1983-01-05 | 1983-12-29 | Pouring tube for casting steel |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS59141354A (en) |
| DE (1) | DE3300166C2 (en) |
| ES (1) | ES284621Y (en) |
| FR (1) | FR2538724B1 (en) |
| GB (1) | GB2135918B (en) |
| IT (1) | IT1195989B (en) |
| SE (1) | SE8307234L (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2148765A (en) * | 1983-11-02 | 1985-06-05 | Didier Werke Ag | Immersion nozzle |
| DE4003608C1 (en) * | 1990-02-07 | 1991-06-27 | Didier-Werke Ag, 6200 Wiesbaden, De | |
| US5370370A (en) * | 1993-02-19 | 1994-12-06 | Vesuvius Crucible Company | Liner for submerged entry nozzle |
| US5691061A (en) * | 1994-06-15 | 1997-11-25 | Vesuvius Crucible Company | Refractory shape having an external layer capable of forming a layer impermeable to gases and process for its preparation |
| EP0826447A1 (en) * | 1996-08-26 | 1998-03-04 | Shinagawa Refractories Co., Ltd. | Nozzle for continuous casting |
| US6321953B1 (en) * | 1996-04-11 | 2001-11-27 | Shinagawa Refractories, Co., Ltd. | Composite immersion nozzle |
| US6475426B1 (en) | 2001-03-27 | 2002-11-05 | Vesuvius Crucible Company | Resin-bonded liner |
| US6537486B1 (en) | 2000-03-17 | 2003-03-25 | Yesuvius Crucible Company | Anti-buildup liner |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3420835C2 (en) * | 1984-06-05 | 1989-11-23 | Chamotte- und Tonwerk Kurt Hagenburger, 6718 Grünstadt | Ceramic sink |
| CH674813A5 (en) * | 1987-07-31 | 1990-07-31 | Stopinc Ag | |
| US4870037A (en) * | 1987-09-23 | 1989-09-26 | Vesuvius Crucible Company | Prevention of Al2 O3 formation in pouring nozzles and the like |
| US5011049A (en) * | 1989-04-17 | 1991-04-30 | General Electric Company | Molten metal transfer tube |
| JP3219095B2 (en) * | 1990-02-20 | 2001-10-15 | 日新製鋼株式会社 | Nozzle for continuous casting |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1148340A (en) * | 1966-07-15 | 1969-04-10 | Vesuvius Crucible Co | Nozzle for a bottom pouring ladle for molten metal |
| GB1454265A (en) * | 1973-01-23 | 1976-11-03 | Flogates Ltd | Casting of metals |
| EP0066492A1 (en) * | 1981-05-27 | 1982-12-08 | Daussan Et Compagnie | Process for the manufacturing of a casting tube |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2804025A1 (en) * | 1977-02-02 | 1978-08-03 | Centre Rech Metallurgique | Continuous casting refractory nozzle mfr. - with addn. of finely divided refractory oxide to improve resistance to chemical attack |
| DE2731367A1 (en) * | 1977-07-12 | 1979-02-08 | Sueddeutsche Kalkstickstoff | Molten steel treatment to prevent reoxidation - by adding a calcium-silicon alloy to the steel stream during casting |
-
1983
- 1983-01-05 DE DE3300166A patent/DE3300166C2/en not_active Expired
- 1983-12-26 ES ES1983284621U patent/ES284621Y/en not_active Expired
- 1983-12-28 FR FR8320930A patent/FR2538724B1/en not_active Expired
- 1983-12-29 GB GB08334549A patent/GB2135918B/en not_active Expired
- 1983-12-30 SE SE8307234A patent/SE8307234L/en not_active Application Discontinuation
-
1984
- 1984-01-04 IT IT19016/84A patent/IT1195989B/en active
- 1984-01-05 JP JP59000120A patent/JPS59141354A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1148340A (en) * | 1966-07-15 | 1969-04-10 | Vesuvius Crucible Co | Nozzle for a bottom pouring ladle for molten metal |
| GB1454265A (en) * | 1973-01-23 | 1976-11-03 | Flogates Ltd | Casting of metals |
| EP0066492A1 (en) * | 1981-05-27 | 1982-12-08 | Daussan Et Compagnie | Process for the manufacturing of a casting tube |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2148765A (en) * | 1983-11-02 | 1985-06-05 | Didier Werke Ag | Immersion nozzle |
| DE4003608C1 (en) * | 1990-02-07 | 1991-06-27 | Didier-Werke Ag, 6200 Wiesbaden, De | |
| US5370370A (en) * | 1993-02-19 | 1994-12-06 | Vesuvius Crucible Company | Liner for submerged entry nozzle |
| US5691061A (en) * | 1994-06-15 | 1997-11-25 | Vesuvius Crucible Company | Refractory shape having an external layer capable of forming a layer impermeable to gases and process for its preparation |
| US6321953B1 (en) * | 1996-04-11 | 2001-11-27 | Shinagawa Refractories, Co., Ltd. | Composite immersion nozzle |
| EP0826447A1 (en) * | 1996-08-26 | 1998-03-04 | Shinagawa Refractories Co., Ltd. | Nozzle for continuous casting |
| US5908577A (en) * | 1996-08-26 | 1999-06-01 | Shinagawa Refractories Co., Ltd. | Nozzle for continuous casting |
| US6537486B1 (en) | 2000-03-17 | 2003-03-25 | Yesuvius Crucible Company | Anti-buildup liner |
| US6475426B1 (en) | 2001-03-27 | 2002-11-05 | Vesuvius Crucible Company | Resin-bonded liner |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59141354A (en) | 1984-08-14 |
| IT1195989B (en) | 1988-11-03 |
| GB8334549D0 (en) | 1984-02-01 |
| FR2538724B1 (en) | 1986-09-05 |
| SE8307234D0 (en) | 1983-12-30 |
| ES284621U (en) | 1985-08-01 |
| SE8307234L (en) | 1984-07-06 |
| DE3300166A1 (en) | 1984-07-12 |
| ES284621Y (en) | 1986-04-16 |
| FR2538724A1 (en) | 1984-07-06 |
| IT8419016A0 (en) | 1984-01-04 |
| GB2135918B (en) | 1986-02-19 |
| DE3300166C2 (en) | 1986-07-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |