CA1070476A - Metallurgical vessels - Google Patents
Metallurgical vesselsInfo
- Publication number
- CA1070476A CA1070476A CA275,631A CA275631A CA1070476A CA 1070476 A CA1070476 A CA 1070476A CA 275631 A CA275631 A CA 275631A CA 1070476 A CA1070476 A CA 1070476A
- Authority
- CA
- Canada
- Prior art keywords
- tundish
- slab
- lining
- central portion
- base
- 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
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
- B22D41/02—Linings
Abstract
ABSTRACT OF THE DISCLOSURE
A tundish is described which consists of an outer metal casing with a base of generally arcuate section and generally upstanding sidewalls, a permanent lining of re-fractory material located adjacent the sidewalls and the base of the casing, and an inner expendable lining of refractory heat insulating material located adjacent the permanent lining. The inner expendable lining is made up of a plurality of elongate slabs having a flexible cen-tral portion and two end portions, the central portion being deformed to fit the generally arcuate base and the two end portions being located adjacent the tundish side-walls. The impact area of the tundish is lined with a highly erosion-resistant or sacrificial material.
A tundish is described which consists of an outer metal casing with a base of generally arcuate section and generally upstanding sidewalls, a permanent lining of re-fractory material located adjacent the sidewalls and the base of the casing, and an inner expendable lining of refractory heat insulating material located adjacent the permanent lining. The inner expendable lining is made up of a plurality of elongate slabs having a flexible cen-tral portion and two end portions, the central portion being deformed to fit the generally arcuate base and the two end portions being located adjacent the tundish side-walls. The impact area of the tundish is lined with a highly erosion-resistant or sacrificial material.
Description
1C~7~ 4 7 ~
The invention relates to metallurgical vessels ofthe type used in continuous casting of steel and known as tundishes.
British Patent Speci~ication 1,364,655 describes a tundish having an outer metal casing ~nA a permanent lining of refractory material ad~acent the casing and an expendable lining made up of a set of slabs of re-fractory heat insulating material, the impact area of the tundish being lined with highly erosion resistant or sacriiicial materlal, The tundish there disclosed has a generally flat base lined with refractory bricks upon which is super$mposed a lining of slabs as de-fined. Nozzle wells are set into the base and these are also lined in such a way as to leave the nozzle ltself open.
Certain tundishes have curved bases and for these it is not readily possible to use slabs as disclosed in the ~ritish Speclflcatlon noted unless they are ~ccurately cut to size which is time-consuming and ex-. .
pensive. Cur~ed slab~ can be manufactured, albeitwith difflculties. However~ in order to make curved slabs, curved formers are needed, made to close toler-ances. In practice, these neYer fit the curve of the tundish lining exactly, especially once the latter i~ not new, which can lead to fitting difficulties and brea~ages. m e present ~n~ention concerns an . 'i1
The invention relates to metallurgical vessels ofthe type used in continuous casting of steel and known as tundishes.
British Patent Speci~ication 1,364,655 describes a tundish having an outer metal casing ~nA a permanent lining of refractory material ad~acent the casing and an expendable lining made up of a set of slabs of re-fractory heat insulating material, the impact area of the tundish being lined with highly erosion resistant or sacriiicial materlal, The tundish there disclosed has a generally flat base lined with refractory bricks upon which is super$mposed a lining of slabs as de-fined. Nozzle wells are set into the base and these are also lined in such a way as to leave the nozzle ltself open.
Certain tundishes have curved bases and for these it is not readily possible to use slabs as disclosed in the ~ritish Speclflcatlon noted unless they are ~ccurately cut to size which is time-consuming and ex-. .
pensive. Cur~ed slab~ can be manufactured, albeitwith difflculties. However~ in order to make curved slabs, curved formers are needed, made to close toler-ances. In practice, these neYer fit the curve of the tundish lining exactly, especially once the latter i~ not new, which can lead to fitting difficulties and brea~ages. m e present ~n~ention concerns an . 'i1
- 2 -'., .
,. ~
~.,.,,~ . . .
. .
:
107047~j -alternati~e and superior way of lining the floor of such a tundish.
According to the present in~ention there is provi-ded a tundish comprising an outer metal casing formed of a base of generally arcuate section and generally upstanding ~idewalls, the impact area of the tundish being lined with a highly erosion-resistant or a sacrificial material, a permanent lining of refractory material being located ad~acent the sidewalls and the base of the casing, an inner expendable lining of refractory heat-insulating material being located ad~acent the permanent lining, wherein the inner expen-dable lining is made up of a plurality of elongate slabs hau~ga ~lexible central portion and two end portions, ths central portion being deformed to fit the generally arcuate base and the two end portions being located ad~acent the tundish sidewalls.
me reguired degree of n exibility of the central portion Or each slab can be obtained by suitably for-mulating the composition of which the lining is made, but this may be un~atisfactory from the point of view of the performance of the lining material. Flexibi-lity can be conferred by suitably formulating the composition used to make the lining to include suitable organic and/or inorganic fibres, e.g. asbestos, cal-cium silicate, and alum~nium silicate fi~res, paper ` 1Cr7~ 47 fibres and wood pulp.
Preferably, however, the central portion of the slab is made up of a plurality of trans~erse sections extendlng across the slab and either connected to-gether by thin webs of the material of the slab so giving the slab an ability to fold or connected to-gether by a suitable internal or external reinforce-ment. A particularly preferred type of slab is one in which the centrsl area comprises a plural1ty of transverse slabs of re~ractory heat insulating material ~oined to each other and to the end portions of the slab by an internal wire mesh reinforcement.
The use of such slabs to line tundishes is ad-vantageous as it makes for rapid and easily carried out lining installation with a minimum of ~oins to be sealed agalnst metal penetration; the gaps between the slabs close up when the lining slab i8 put into position, The ease and speed Or installing the expendable lining of the lnvention is highly advan-tageous and leads to substantial steelwork~ economies.
An embodiment oi the invention is illustrated in the accompanying diagrammatic drawings, in which Figure 1 is a tran~verse sectional view oi a tundish incorporating an expendable l~n~ng;
Figure 2 i3 an end ele~ation o~ a llning slab for use in the tundish o~ F~gure 1, and .
., .
:;
' , 1070~76 Figure 3 is a sectional view of Figure 1 showing the slab during its insertion into the tundish.
me tundish shown in the Figures comprises an outer metal casing 1 comprising integrally formed opposite sidewall~ 2 Joined by an arcuate base 3.
Reinforci~g flanges 4 are located on the outside of the casing, together with lifting hooks and like parts, not shown. The side walls and base of the casing are lined with a permanent refractory lining 5, formed of one or more layers of refractory brick or cast retractory concrete, An expendable lining comprise~ a row of rela-tively flexible heat-insulating slabs 6, one of which is shown in Figure 2. The slab is formed o~ a composition comprising, parts by weight silica sand 87.5 paper 3.0 urea formaldehyde resin 2.5 phenol formaldehyde resin 2.0 asbestos fibre 5.0 by making an aqueous slurry of the ingredients and then dewatering that slurry by pressure or vacuum ag~inst a perforate former of a suitable shape. In forming the slab a web 7 of wire mesh is located with-in the thickness of the slab and grooves 8 are formed in one face in the longitudinal central area of the 1(~7047~i slab and extending from the face of the slab towards the mesh. The presence of the groo~es 8 ensures that the central part of the slab may be ~lexed while the presence of the mesh tends to prevent such flexure from rupturing the slab.
The slab 6 is preferably 30 mm thick and its length will depend on the dimensions of the tundish into which it is to be fitted. Pre~erably for a slab ~0 mm thick the grooves 8, which generally will be of -V- cross-sectional shape, extend into the thickness to a depth o~ about 14 mm. The slab formed from the composition specified above will be a rela-tively high heat-insulating reiractory material having a relatively low heat capaclty.
In use, a slab 6 i8 taken from the flat condi-tion shown in Figure 2, folded longitudinally into generally -U- ehape and is then inserted into the tundi~h to line the permanent lining 5~ The folded lining is then urged lnto tight engagement with the permanent lining 5 and where necessary any gaps are sealed by a re~ractory mortar, AS the slab bends to take up its final position, the V-section grooves close up and accordingly a~ter the slab is installed, these grooves do not provtde areas of possible metal penetration. It will be appreciated that some o~
the slab3 6 rill overlio ~ornatlons in the tundigh , ., wall~ e.g. nozzles, pouring pad, and apertures may be made in those slabs for such formations, either during forming or by cutting out from a formed slab.
The presence of slab 6 enables one to achieve in relation to tundishes having an arcuate base, the advantages listed in British Patent Specification 1,364,655 for flat base tundishes~
,. ~
~.,.,,~ . . .
. .
:
107047~j -alternati~e and superior way of lining the floor of such a tundish.
According to the present in~ention there is provi-ded a tundish comprising an outer metal casing formed of a base of generally arcuate section and generally upstanding ~idewalls, the impact area of the tundish being lined with a highly erosion-resistant or a sacrificial material, a permanent lining of refractory material being located ad~acent the sidewalls and the base of the casing, an inner expendable lining of refractory heat-insulating material being located ad~acent the permanent lining, wherein the inner expen-dable lining is made up of a plurality of elongate slabs hau~ga ~lexible central portion and two end portions, ths central portion being deformed to fit the generally arcuate base and the two end portions being located ad~acent the tundish sidewalls.
me reguired degree of n exibility of the central portion Or each slab can be obtained by suitably for-mulating the composition of which the lining is made, but this may be un~atisfactory from the point of view of the performance of the lining material. Flexibi-lity can be conferred by suitably formulating the composition used to make the lining to include suitable organic and/or inorganic fibres, e.g. asbestos, cal-cium silicate, and alum~nium silicate fi~res, paper ` 1Cr7~ 47 fibres and wood pulp.
Preferably, however, the central portion of the slab is made up of a plurality of trans~erse sections extendlng across the slab and either connected to-gether by thin webs of the material of the slab so giving the slab an ability to fold or connected to-gether by a suitable internal or external reinforce-ment. A particularly preferred type of slab is one in which the centrsl area comprises a plural1ty of transverse slabs of re~ractory heat insulating material ~oined to each other and to the end portions of the slab by an internal wire mesh reinforcement.
The use of such slabs to line tundishes is ad-vantageous as it makes for rapid and easily carried out lining installation with a minimum of ~oins to be sealed agalnst metal penetration; the gaps between the slabs close up when the lining slab i8 put into position, The ease and speed Or installing the expendable lining of the lnvention is highly advan-tageous and leads to substantial steelwork~ economies.
An embodiment oi the invention is illustrated in the accompanying diagrammatic drawings, in which Figure 1 is a tran~verse sectional view oi a tundish incorporating an expendable l~n~ng;
Figure 2 i3 an end ele~ation o~ a llning slab for use in the tundish o~ F~gure 1, and .
., .
:;
' , 1070~76 Figure 3 is a sectional view of Figure 1 showing the slab during its insertion into the tundish.
me tundish shown in the Figures comprises an outer metal casing 1 comprising integrally formed opposite sidewall~ 2 Joined by an arcuate base 3.
Reinforci~g flanges 4 are located on the outside of the casing, together with lifting hooks and like parts, not shown. The side walls and base of the casing are lined with a permanent refractory lining 5, formed of one or more layers of refractory brick or cast retractory concrete, An expendable lining comprise~ a row of rela-tively flexible heat-insulating slabs 6, one of which is shown in Figure 2. The slab is formed o~ a composition comprising, parts by weight silica sand 87.5 paper 3.0 urea formaldehyde resin 2.5 phenol formaldehyde resin 2.0 asbestos fibre 5.0 by making an aqueous slurry of the ingredients and then dewatering that slurry by pressure or vacuum ag~inst a perforate former of a suitable shape. In forming the slab a web 7 of wire mesh is located with-in the thickness of the slab and grooves 8 are formed in one face in the longitudinal central area of the 1(~7047~i slab and extending from the face of the slab towards the mesh. The presence of the groo~es 8 ensures that the central part of the slab may be ~lexed while the presence of the mesh tends to prevent such flexure from rupturing the slab.
The slab 6 is preferably 30 mm thick and its length will depend on the dimensions of the tundish into which it is to be fitted. Pre~erably for a slab ~0 mm thick the grooves 8, which generally will be of -V- cross-sectional shape, extend into the thickness to a depth o~ about 14 mm. The slab formed from the composition specified above will be a rela-tively high heat-insulating reiractory material having a relatively low heat capaclty.
In use, a slab 6 i8 taken from the flat condi-tion shown in Figure 2, folded longitudinally into generally -U- ehape and is then inserted into the tundi~h to line the permanent lining 5~ The folded lining is then urged lnto tight engagement with the permanent lining 5 and where necessary any gaps are sealed by a re~ractory mortar, AS the slab bends to take up its final position, the V-section grooves close up and accordingly a~ter the slab is installed, these grooves do not provtde areas of possible metal penetration. It will be appreciated that some o~
the slab3 6 rill overlio ~ornatlons in the tundigh , ., wall~ e.g. nozzles, pouring pad, and apertures may be made in those slabs for such formations, either during forming or by cutting out from a formed slab.
The presence of slab 6 enables one to achieve in relation to tundishes having an arcuate base, the advantages listed in British Patent Specification 1,364,655 for flat base tundishes~
Claims (5)
1. In a tundish comprising an outer metal casing formed of a base of generally arcuate section and generally upstan-ding sidewalls, the impact area of the tundish being lined with a material selected from the class consisting of highly erosion-resistant and sacrificial materials, a permanent lining of refractory material located adjacent the sidewalls and the base of the casing, and an inner expendable lining of refractory heat insulating material located adjacent the permanent lining, the improvement which comprises forming the inner expendable lining of a plurality of elongate slabs having a flexible central portion and two end portions, the central portion being deformed to fit the generally arcuate base and the two end portions being located adjacent the tundish sidewalls.
2. The tundish of claim 1 wherein the central portion of each slab is formulated from fibre-containing refractory heat insulating material of inherent flexibility.
3. The tundish of claim 1 wherein the central portion of each lining slab is made up of a plurality of transverse sections extending across the slab connected together by reduced thickness portions to give the slab an ability to fold.
4. The tundish of claim 1 wherein the central portion of each slab is made up of a plurality of transverse sec-tions connected together by a reinforcement.
5. The tundish of claim 4 wherein the reinforcement in each section is an internal wire mesh.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB14196/76A GB1540090A (en) | 1976-04-07 | 1976-04-07 | Tundishes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1070476A true CA1070476A (en) | 1980-01-29 |
Family
ID=10036782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA275,631A Expired CA1070476A (en) | 1976-04-07 | 1977-04-05 | Metallurgical vessels |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS52123328A (en) |
| BE (1) | BE853361A (en) |
| BR (2) | BR7702179A (en) |
| CA (1) | CA1070476A (en) |
| DE (1) | DE2715706C3 (en) |
| GB (1) | GB1540090A (en) |
| MX (1) | MX146328A (en) |
| SE (1) | SE421757B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5360200A (en) * | 1992-07-28 | 1994-11-01 | Foesco International Limited | Lining of molten metal handling vessel |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ZA814207B (en) * | 1980-07-02 | 1982-07-28 | Foseco Trading Ag | Metal casting and lined ladles therefor |
| ATE19657T1 (en) * | 1981-09-19 | 1986-05-15 | Foseco Trading Ag | CHANNEL FOR METAL MELTING. |
| DE3301112C2 (en) * | 1983-01-14 | 1985-11-21 | Micheal Donald Ellwood City Pa. Labate | Blast furnace trough or intermediate container for molten metal |
| GB8705736D0 (en) * | 1987-03-11 | 1987-04-15 | Jet Refractories Ltd | Refractory composition |
| US5375323A (en) * | 1991-10-30 | 1994-12-27 | Nsk Ltd. | Method for securing shaft of cam follower device for valve action mechanism |
| AU2016235941B2 (en) * | 2015-03-24 | 2020-07-02 | Vesuvius Usa Corporation | Metallurgical vessel lining with configured perforation structure |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE759414A (en) * | 1970-01-20 | 1971-04-30 | Diederichs S A Atel | DEVICE ENSURING THE ELIMINATION OF THE FALSE SLIDE (S) IN THE SHUTTLE LOBSTERS |
| GB1364665A (en) * | 1971-12-07 | 1974-08-29 | Foseco Trading Ag | Tundishes |
| GB1431652A (en) * | 1972-03-30 | 1976-04-14 | Foseco Int | Flexible liners for ingot mould hot tops and for tundishes |
| DE2227329A1 (en) * | 1972-05-31 | 1973-12-13 | Siemens Ag | STEP-BY-STEP TRANSMISSION |
| JPS551178B2 (en) * | 1972-08-18 | 1980-01-12 |
-
1976
- 1976-04-07 GB GB14196/76A patent/GB1540090A/en not_active Expired
-
1977
- 1977-03-30 JP JP3694377A patent/JPS52123328A/en active Pending
- 1977-04-05 SE SE7703987A patent/SE421757B/en unknown
- 1977-04-05 CA CA275,631A patent/CA1070476A/en not_active Expired
- 1977-04-05 MX MX168655A patent/MX146328A/en unknown
- 1977-04-06 BR BR7702179A patent/BR7702179A/en unknown
- 1977-04-06 BR BR7702197A patent/BR7702197A/en unknown
- 1977-04-07 BE BE176517A patent/BE853361A/en unknown
- 1977-04-07 DE DE2715706A patent/DE2715706C3/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5360200A (en) * | 1992-07-28 | 1994-11-01 | Foesco International Limited | Lining of molten metal handling vessel |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2715706A1 (en) | 1977-10-27 |
| DE2715706B2 (en) | 1981-02-12 |
| BR7702179A (en) | 1978-01-17 |
| MX146328A (en) | 1982-06-10 |
| BE853361A (en) | 1977-08-01 |
| SE7703987L (en) | 1977-10-08 |
| GB1540090A (en) | 1979-02-07 |
| BR7702197A (en) | 1978-06-06 |
| JPS52123328A (en) | 1977-10-17 |
| SE421757B (en) | 1982-02-01 |
| DE2715706C3 (en) | 1982-08-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |