CA2027045C - Hot blast main constructions including a junction - Google Patents
Hot blast main constructions including a junctionInfo
- Publication number
- CA2027045C CA2027045C CA 2027045 CA2027045A CA2027045C CA 2027045 C CA2027045 C CA 2027045C CA 2027045 CA2027045 CA 2027045 CA 2027045 A CA2027045 A CA 2027045A CA 2027045 C CA2027045 C CA 2027045C
- Authority
- CA
- Canada
- Prior art keywords
- hot blast
- mains
- junction
- main
- circular
- 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 - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
- C21B9/10—Other details, e.g. blast mains
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Blast Furnaces (AREA)
- Joining Of Building Structures In Genera (AREA)
- Joints Allowing Movement (AREA)
- Thermal Insulation (AREA)
Abstract
A junction in a hot blast main construction is formed between first and a second horizontal, circular hot blast mains. Each main has a steel jacket and inside the steel jacket refractory brickwork bounding a passage for the hot blast through the main. To achieve a simple construction, at said junction the steel jackets of circular cross-section of are coupled directly to each other without interposition of any intermediate jacket pieces and at the top side of both the first and second mains the brickwork is constituted by shaped bricks which are suspended from the steel jackets.
Description
~ 2027045 HOT BLAST MAIN Cu..;,ll~a~ ONS rNrr~lJnTNG A JUNCTION
BACKGROUND OF THE INVENTION
5 l. FIE~D OF THE INVENTION
The invention relates to a ~unctlon of a first and a second substantially circular hot blast mains which extend substantially horlzontally, suitable for use in a hot blast main construction for feeding hot 10 blast into a blast furnace. Each hot blast main comprises a circular-section steel jacket which is provided on its inside with refractory brickwork.
BACKGROUND OF THE INVENTION
5 l. FIE~D OF THE INVENTION
The invention relates to a ~unctlon of a first and a second substantially circular hot blast mains which extend substantially horlzontally, suitable for use in a hot blast main construction for feeding hot 10 blast into a blast furnace. Each hot blast main comprises a circular-section steel jacket which is provided on its inside with refractory brickwork.
2. DESCRIPTION OF THE PRIOR ART
A junction of hot blast mains as described above is discussed in US-A-3 853 307, for use in the hot blast main8 of a blast furnace. At the junction, in the brickwork a triangular flat arch is provided comprising special bricks which are suspended on a flat transitional steel plate by means of st~1n7pRc steel 20 suspension anchors. This flat transitional steel plate is interposed where the first and the second hot blast mains meet each other. The ~unction is also provided with i~ te steel pieces which complete the joint between the respective circular steel jackets of the 25 hot blast mains and the triangular flat plate. These intP ~ te pieces are curved and the degree of _ _ _ . . . , _ _ . _ . . . _ . _ . . _ _ _ _ curving depends on the diameters of the hot blast mains coupled together. In the case of equal diameters of the coupled mains, this curving is part-cylindrical in shape, but in the case of different ~2 L~L~2 the i~ f ~11 Ate pieces take the shape of a portion of a conic section. Furth: e3 the steel structure must be provided with reinforcements to ensure that the arch stays flat on the inside of the hot blast mains. This construction has the disadvantage of c~ Y~ ty of shapes of the steel jacket parts and of the brickwork.
SU-A-195561 and DE-A-2517026 illustrate ~unctions of hot blast mains but give no t~chn1~-Al details of the reLLc~iLoLy structure at the junctions.
SUMMARY OF THE INVENTION
The ob~ect of the invention is to provide a simplified ~2LlLI-;LUL~ at the Junction of two hot blast mains and in particular to make fitting a new coupling into a hot blast main less costly because of the greater simplicity.
In a.c<,L-la~l~ with the invention, at the ~unction the circular Jackets of the first and second hot blast mains are directly coupled to each other without use of one or more int 'l2qte transitional ; acket pieces between the f irst and second mains and the brickwork at the top of both the hot blast mains is formed from shaped bricks which are ~1Cr~nrl~d on the . . . ~
clrcular jackets of first and second hot blast mains.
The coupling ~ oint in accordance with the invention provides the advantage that the steel ~ ackets of the hot blast mains to be coupled together do not need to be replaced by a structure of a flat top piece with other complex shaped inl,~ te pieces, but that rather it suf f ices to suspend shaped bricks of the brickwork on for example st~nleqA steel hangers which are suspended on the ~ackets of the two hot blast mains. With this structure it has been found possible to achieve good stability and good smoothness of the brickwork on the inslde of the mains at the ~unction.
Shaped bricks, e . g . moulded bricks, which are used in the invention will be of a plurality of different shapes in order to provide the desired shape of the conduits at the J unction, and for example in order to c~ te for the differing distances which have to be brldged by the ~ qr_n~11n~ hangers as a result of the circular shape of the hot blast mains.
Compared with the construction of US-A-3 853 307, the junction in accordance with the invention can also provide the further advantage that, where ~ eL~, of the first and the second hot blast main differ from one another, the top 8ides of the first and second hot blast main do not need to set at the same height. This is indeed required with the _ _ _ _ _ _ _ _ , . . . . _ .... _ _ . . _ .. .. .
~ 2027045 junction in accordance with the prior art. For this reason the invention offers significantly broader design possibilities for this kind of ~unction which in turn makes certain cost benefits feasible. One example could be less ^hiln~cAl f~n3~n~ ring in modifications to existing mains.
It is desirable that the shaped bricks be provided with tongue and groove ~oints at their abutting faces to prevent any relative vertical ~l~Crl~ t.
BRIEF II~lAoL~u~ ON OF THE DRAWINGS
The invention will now be illustrated by description of a non-limitative F.mhQrli t, with reference to the ~ ing drawings, in which:-Fig. 1 shows the hot blast main junction in accordance with the current state of the art in top view:
Fig. 2 shows a hot blast main Junction in ac.;oIda~ with the invention in top view:
Fig. 3 shows a detail of the ~unction of Fig. 1 with the invention in cross-section.
DESCRIPTION OF THE ~A~;~hAkhLI EMBODIMENT
In Fig. 1 a feeding main 1 of a hot blast mains system is shown which is coupled to a discharge main 2 at a junction 3. At the junction, there are adaitional pieces inserted which consist of a flat triangular top _ _ _ _ _ _ __ ___ , _ , .,,, .. ,, ,, . , . , ,,,, . , . _ .,,, ,, , ___ ~ 2027045 .
plate 4 and curved side pleces 5 which serve as qte or transition pieces between the feeder main 1 and the discharge main 2. As lllustrated in Fig.
A junction of hot blast mains as described above is discussed in US-A-3 853 307, for use in the hot blast main8 of a blast furnace. At the junction, in the brickwork a triangular flat arch is provided comprising special bricks which are suspended on a flat transitional steel plate by means of st~1n7pRc steel 20 suspension anchors. This flat transitional steel plate is interposed where the first and the second hot blast mains meet each other. The ~unction is also provided with i~ te steel pieces which complete the joint between the respective circular steel jackets of the 25 hot blast mains and the triangular flat plate. These intP ~ te pieces are curved and the degree of _ _ _ . . . , _ _ . _ . . . _ . _ . . _ _ _ _ curving depends on the diameters of the hot blast mains coupled together. In the case of equal diameters of the coupled mains, this curving is part-cylindrical in shape, but in the case of different ~2 L~L~2 the i~ f ~11 Ate pieces take the shape of a portion of a conic section. Furth: e3 the steel structure must be provided with reinforcements to ensure that the arch stays flat on the inside of the hot blast mains. This construction has the disadvantage of c~ Y~ ty of shapes of the steel jacket parts and of the brickwork.
SU-A-195561 and DE-A-2517026 illustrate ~unctions of hot blast mains but give no t~chn1~-Al details of the reLLc~iLoLy structure at the junctions.
SUMMARY OF THE INVENTION
The ob~ect of the invention is to provide a simplified ~2LlLI-;LUL~ at the Junction of two hot blast mains and in particular to make fitting a new coupling into a hot blast main less costly because of the greater simplicity.
In a.c<,L-la~l~ with the invention, at the ~unction the circular Jackets of the first and second hot blast mains are directly coupled to each other without use of one or more int 'l2qte transitional ; acket pieces between the f irst and second mains and the brickwork at the top of both the hot blast mains is formed from shaped bricks which are ~1Cr~nrl~d on the . . . ~
clrcular jackets of first and second hot blast mains.
The coupling ~ oint in accordance with the invention provides the advantage that the steel ~ ackets of the hot blast mains to be coupled together do not need to be replaced by a structure of a flat top piece with other complex shaped inl,~ te pieces, but that rather it suf f ices to suspend shaped bricks of the brickwork on for example st~nleqA steel hangers which are suspended on the ~ackets of the two hot blast mains. With this structure it has been found possible to achieve good stability and good smoothness of the brickwork on the inslde of the mains at the ~unction.
Shaped bricks, e . g . moulded bricks, which are used in the invention will be of a plurality of different shapes in order to provide the desired shape of the conduits at the J unction, and for example in order to c~ te for the differing distances which have to be brldged by the ~ qr_n~11n~ hangers as a result of the circular shape of the hot blast mains.
Compared with the construction of US-A-3 853 307, the junction in accordance with the invention can also provide the further advantage that, where ~ eL~, of the first and the second hot blast main differ from one another, the top 8ides of the first and second hot blast main do not need to set at the same height. This is indeed required with the _ _ _ _ _ _ _ _ , . . . . _ .... _ _ . . _ .. .. .
~ 2027045 junction in accordance with the prior art. For this reason the invention offers significantly broader design possibilities for this kind of ~unction which in turn makes certain cost benefits feasible. One example could be less ^hiln~cAl f~n3~n~ ring in modifications to existing mains.
It is desirable that the shaped bricks be provided with tongue and groove ~oints at their abutting faces to prevent any relative vertical ~l~Crl~ t.
BRIEF II~lAoL~u~ ON OF THE DRAWINGS
The invention will now be illustrated by description of a non-limitative F.mhQrli t, with reference to the ~ ing drawings, in which:-Fig. 1 shows the hot blast main junction in accordance with the current state of the art in top view:
Fig. 2 shows a hot blast main Junction in ac.;oIda~ with the invention in top view:
Fig. 3 shows a detail of the ~unction of Fig. 1 with the invention in cross-section.
DESCRIPTION OF THE ~A~;~hAkhLI EMBODIMENT
In Fig. 1 a feeding main 1 of a hot blast mains system is shown which is coupled to a discharge main 2 at a junction 3. At the junction, there are adaitional pieces inserted which consist of a flat triangular top _ _ _ _ _ _ __ ___ , _ , .,,, .. ,, ,, . , . , ,,,, . , . _ .,,, ,, , ___ ~ 2027045 .
plate 4 and curved side pleces 5 which serve as qte or transition pieces between the feeder main 1 and the discharge main 2. As lllustrated in Fig.
3 for the embodiment of the invention, the hot blast mains 1, 2 of Fig . 1 have outer steel ~ ackets and a refractory lining inside the ~ackets. The illL~ te pieces 4, 5 thus form coupling pieces joining the outer ackets of the mains 1, 2 .
The int~ qte side pieces 5 are curved, and the degree of curvature depends on the diameters of the hot blast mains 1 and 2 coupled together. Where the a11i L~:L;~ of the hot blast mains 1 and 2 to be coupled L~,jJ~:tllel are the same, this iULV~LUL~ is circular, but where the diameters differ the illt ~1 ~te side pieces 5 take the shape of a portion of a conic section.
In the constructlon of Fig. 2 which shows the junction embodying the invention the flat triangular top plate 4 of Fig. 1 is missing, as are the arched int ~ ?te pieces 5 . The steel ~ ackets of the ieeder main 1 and the discharge main 2 are coupled directly to each other. Thus the circular outer shape of the J ackets mains 1 and 2 is not altered by the interposition of i-lLt:L ~al~ate pieces, but the circular ~ackets join directly into each other. In the ' -~1 L shown the two mains 1,2 are both horizontal and ~oin at 90, but other joining angles are posYlhle~
_ _ _ _ . . . . . . .. .. . ... . .
~ 2~27045 Fig. 3 shows a transverse cross-section of the junction of Fig. 2. The plane of the section is Llal~,vt,l,~e to the axis of the main 1, immediately adjacent the junction region and looking in the direction of the feeder main 1 away from the junction but the same view applies also to the main 2 at both sldes of the; unction Fig . 3 shows the steel outer jacket 6 inside which the reLLc-.iLoly lining 7 is placed. At the top of the mains 1, 2 throughout the region of the ~unction, the refractory bricks are suspended by means of st~inl~sc steel hangers 8. These hangers 8 are connected to the steel ; acket 6 . The bricks so s~ep~n~lPd are moulded bricks 9a, b, lOa, b and lla, b. As Fig. 3 shows these bricks are of three different shapes, in order to provide the desired inner shape of the reLlc.~;L~ y lining and to fit to the ad~acent bricks. The expert in this art is able to design sllRp~n~ d shaped bricks to complete the top parts of the mains at the ~ unction .
The ~cllcp~nrl~A bricks are provided with tongue and grooved structure 12 at their abutting faces to prevent their mutual vertical ~ epl A~ - L under the effect of thermal ~Yr~nc~n The connection of the moulded bricks of a feeder main 1 and a discharge main 2 of differing .11 Lc~ls may be made, for example by making the feeder main and ~ 2027û45 the discharge main the same height on the top sides of the ~ ackets of both mains ( not shown in drawing ) .
However, this is not a prerequisite of the invention.
The junction of a feeder main 1 and a discharge main 2 5 in accordance with the invention does not place any demands on the relative positioning of the mains 1 and 2. This is a ~n1 f~c~nt advantage of the ~unction in accordance with the invention, _ ~ :d with that in accordance with the current state of the art.
The int~ qte side pieces 5 are curved, and the degree of curvature depends on the diameters of the hot blast mains 1 and 2 coupled together. Where the a11i L~:L;~ of the hot blast mains 1 and 2 to be coupled L~,jJ~:tllel are the same, this iULV~LUL~ is circular, but where the diameters differ the illt ~1 ~te side pieces 5 take the shape of a portion of a conic section.
In the constructlon of Fig. 2 which shows the junction embodying the invention the flat triangular top plate 4 of Fig. 1 is missing, as are the arched int ~ ?te pieces 5 . The steel ~ ackets of the ieeder main 1 and the discharge main 2 are coupled directly to each other. Thus the circular outer shape of the J ackets mains 1 and 2 is not altered by the interposition of i-lLt:L ~al~ate pieces, but the circular ~ackets join directly into each other. In the ' -~1 L shown the two mains 1,2 are both horizontal and ~oin at 90, but other joining angles are posYlhle~
_ _ _ _ . . . . . . .. .. . ... . .
~ 2~27045 Fig. 3 shows a transverse cross-section of the junction of Fig. 2. The plane of the section is Llal~,vt,l,~e to the axis of the main 1, immediately adjacent the junction region and looking in the direction of the feeder main 1 away from the junction but the same view applies also to the main 2 at both sldes of the; unction Fig . 3 shows the steel outer jacket 6 inside which the reLLc-.iLoly lining 7 is placed. At the top of the mains 1, 2 throughout the region of the ~unction, the refractory bricks are suspended by means of st~inl~sc steel hangers 8. These hangers 8 are connected to the steel ; acket 6 . The bricks so s~ep~n~lPd are moulded bricks 9a, b, lOa, b and lla, b. As Fig. 3 shows these bricks are of three different shapes, in order to provide the desired inner shape of the reLlc.~;L~ y lining and to fit to the ad~acent bricks. The expert in this art is able to design sllRp~n~ d shaped bricks to complete the top parts of the mains at the ~ unction .
The ~cllcp~nrl~A bricks are provided with tongue and grooved structure 12 at their abutting faces to prevent their mutual vertical ~ epl A~ - L under the effect of thermal ~Yr~nc~n The connection of the moulded bricks of a feeder main 1 and a discharge main 2 of differing .11 Lc~ls may be made, for example by making the feeder main and ~ 2027û45 the discharge main the same height on the top sides of the ~ ackets of both mains ( not shown in drawing ) .
However, this is not a prerequisite of the invention.
The junction of a feeder main 1 and a discharge main 2 5 in accordance with the invention does not place any demands on the relative positioning of the mains 1 and 2. This is a ~n1 f~c~nt advantage of the ~unction in accordance with the invention, _ ~ :d with that in accordance with the current state of the art.
Claims (4)
1. A hot blast main construction comprising a first hot blast main and a second hot blast main which joins into said first main at a junction, each said main extending substantially horizontally at the region of said junction and having a steel jacket which is substantially circular in cross-sectional view perpendicular to the axis of the main and inside the steel jacket refractory brickwork bounding a passage for the hot blast, wherein at said junction said steel jackets of circular cross-section of said first and second mains are coupled directly to each other without interposition of any intermediate jacket pieces and at the top side of both said first and second mains at said junction said brickwork is constituted by bricks which are suspended from said jackets of said first and second mains.
2. A hot blast main construction according to claim 1 wherein said bricks are fitted together with tongue-and-groove joints, so as to prevent their mutual vertical displacement.
3. A hot blast main construction according to claim 1 wherein said first and second mains have substantially the same diameter.
4. In a junction of first and second hot blast mains which extend horizontally and are circular in transverse cross-section, and wherein each said main has a circular steel jacket and refractory brickwork inside said steel jacket, which brickwork is partly constituted of bricks suspended from said jacket, the improvement that at said junction said circular jackets of said first and second mains are coupled to each other without interposition of any transitional jacket pieces and that at said junction said brickwork at the upper side of both said first and second mains is constituted by bricks suspended from said circular jackets of said first and second mains.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL8902589A NL8902589A (en) | 1989-10-19 | 1989-10-19 | TORQUE CONNECTION HOTWIND PIPES. |
| NL8902589 | 1989-10-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2027045A1 CA2027045A1 (en) | 1991-04-20 |
| CA2027045C true CA2027045C (en) | 1996-12-17 |
Family
ID=19855482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2027045 Expired - Fee Related CA2027045C (en) | 1989-10-19 | 1990-10-05 | Hot blast main constructions including a junction |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0423862B1 (en) |
| JP (2) | JPH03134110A (en) |
| CA (1) | CA2027045C (en) |
| DE (1) | DE69003221T2 (en) |
| NL (1) | NL8902589A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113278754B (en) * | 2021-04-14 | 2022-04-26 | 马鞍山钢铁股份有限公司 | Hot air outlet structure of hot air furnace and masonry process thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ZA734561B (en) * | 1972-07-19 | 1974-06-26 | Hoogovens Ijmuiden Bv | A conduit system for the transport of hot gases,especially hot blast air for a blast furnace,which conduit system includes a connector plug |
| DE2517026B2 (en) * | 1975-04-17 | 1978-10-19 | Centralnyj Nautschno-Issledovatelskij I Proektnyj Institut Stroitelnych Metallokonstrukcij, Moskau | Support device for holding a hot blast pipe of a blast furnace |
| JPS5333281A (en) * | 1976-09-07 | 1978-03-29 | Nitto Electric Ind Co Ltd | Foamed and laminated sheet, tile block for construction and production of the same |
| DE2926955C2 (en) * | 1979-07-04 | 1984-09-20 | Jagenberg-Werke AG, 4000 Düsseldorf | Method and device for removing foam above the level of a liquid, in particular above liquid filling material, e.g. milk |
| LU82176A1 (en) * | 1980-02-15 | 1980-05-07 | Wurth Anciens Ets Paul | INSTALLATION FOR PRODUCING HOT WIND AND METHOD OF IMPLEMENTING |
| GB2118672B (en) * | 1982-04-22 | 1986-06-18 | Curtiss Wright Corp | High temperature lined conduits elbows and tees and method of making same |
-
1989
- 1989-10-19 NL NL8902589A patent/NL8902589A/en not_active Application Discontinuation
-
1990
- 1990-10-02 EP EP19900202611 patent/EP0423862B1/en not_active Revoked
- 1990-10-02 DE DE1990603221 patent/DE69003221T2/en not_active Expired - Fee Related
- 1990-10-05 CA CA 2027045 patent/CA2027045C/en not_active Expired - Fee Related
- 1990-10-18 JP JP27794190A patent/JPH03134110A/en active Pending
-
1994
- 1994-11-22 JP JP1546494U patent/JPH0731849U/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0423862A1 (en) | 1991-04-24 |
| DE69003221T2 (en) | 1994-02-03 |
| EP0423862B1 (en) | 1993-09-08 |
| JPH03134110A (en) | 1991-06-07 |
| NL8902589A (en) | 1991-05-16 |
| JPH0731849U (en) | 1995-06-16 |
| CA2027045A1 (en) | 1991-04-20 |
| DE69003221D1 (en) | 1993-10-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |