CN112708722A - Overhead and converter installation method - Google Patents
Overhead and converter installation method Download PDFInfo
- Publication number
- CN112708722A CN112708722A CN202011372885.XA CN202011372885A CN112708722A CN 112708722 A CN112708722 A CN 112708722A CN 202011372885 A CN202011372885 A CN 202011372885A CN 112708722 A CN112708722 A CN 112708722A
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- section
- folding
- converter
- folding section
- fixed section
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- 238000009434 installation Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 238000011900 installation process Methods 0.000 abstract description 4
- 238000003466 welding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4633—Supporting means
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention relates to the technical field of converter installation, and provides an overhead structure, which comprises a ladle trolley and eight stand columns; the upright post comprises a fixed section and a folding section; the fixed section is vertically arranged and connected with the ladle trolley together; the end part of the folding section is rotationally connected with the upper end of the fixed section through a horizontal rotating shaft, so that the folding section can rotate downwards around the horizontal rotating shaft; the folding device further comprises a locking device used for locking the folding section in the vertical state. After the converter is in place, the locking device between the folding section and the fixing section needs to be released, then acting force can be applied to the folding section to control the folding section to rotate downwards around the horizontal rotating shaft so as to be folded, and the overhead frame is moved away from the lower part of the converter, so that the situation that the folding section is folded under the condition that the locking device is not completely released is avoided, and the safety of the overhead frame is improved. The method for installing the converter is provided, the converter is transported by adopting the high frame with high safety, and the safety of the converter installation process is improved.
Description
Technical Field
The invention relates to the technical field of converter installation, in particular to an overhead frame and a converter installation method.
Background
When the steel converter needs to be overhauled, the operation space at the installation position of the converter is narrow, construction and production are crossed more, the production coordination difficulty is high, the converter cannot be overhauled at the installation position, the converter needs to be integrally moved to the overhaul station for overhauling, and the converter is integrally moved to the installation position from the overhaul station for installation after overhauling.
At present, an overhead converter is adopted for integrally moving, but due to space limitation, when the converter is moved to an installation position and is installed, eight upright posts on the overhead converter interfere with a platform and the converter, so that the overhead converter cannot be moved from the lower part of the converter, the upright posts must be cut off at the moment to move the overhead converter, the upright posts are damaged, and the workload of workers is greatly increased.
Application number is 201120075539.5, application date is 2011.03.21, in the patent application of the name is an overhead for installation of four-point suspension type large-scale converter, an overhead for transporting converter is disclosed, the stand of this overhead comprises upper and lower two sections that are detachable connections, after the converter installation is completed, only need to dismantle the upper segment of stand and just can remove the overhead, although need not cut the stand, but because the quality of stand is great, at the in-process of dismantling the stand upper segment, it has not yet completely dismantled and the stand upper segment collapses and injures operative employee's incident to appear very easily connecting device between stand upper segment and the hypomere, its security is relatively poor.
Disclosure of Invention
The invention aims to provide an overhead frame with high construction safety and a converter installation method.
The technical scheme adopted by the invention for solving the technical problems is as follows: an overhead frame comprises a ladle trolley and eight stand columns arranged on the ladle trolley; the upright post comprises a fixed section and a folding section; the fixed section is vertically arranged and connected with the ladle trolley together; the end part of the folding section is rotatably connected with the upper end of the fixed section through a horizontal rotating shaft, so that the folding section can rotate downwards around the horizontal rotating shaft; the axial direction of the horizontal rotating shaft is perpendicular to the moving direction of the ladle trolley; the folding device further comprises a locking device arranged between the fixed section and the folding section and used for locking the folding section in a vertical state.
Further, when the folding section is in the vertical state, the lower end face of the folding section is abutted to the upper end face of the fixing section.
Furthermore, locking device is including setting up the first boss on the fixed section, set up the second boss on folding section to and be used for dismantling the first fastener of being connected with the second boss with first boss.
Further, the first fastening device comprises a first bolt passing through the first boss and the second boss, and a first nut screwed at the end of the first bolt.
Further, the locking device comprises a connecting plate; one end of the connecting plate is detachably connected with the fixed section; the other end of the connecting plate is detachably connected with the folding section.
Furthermore, the locking device comprises a supporting seat arranged on the fixed section and a folding oil cylinder with one end hinged with the supporting seat and the other end hinged with the folding section; the folding oil cylinder is used for driving the folding section to rotate relative to the fixed section and locking the folding section in a vertical state.
Further, the fixed section is rotatably mounted on the ladle trolley, so that the fixed section can rotate around the axis of the fixed section.
Further, the fixed section is installed on the ladle trolley through a slewing mechanism.
The converter installation method comprises the following steps:
s1, the elevated frame is matched on the track in a rolling way, and the folding section is locked in a vertical state; a jack for jacking the converter and a steel support for supporting the converter are arranged at the top of the folding section;
s2, hoisting the converter and supporting the converter on a steel support; then controlling the ladle trolley to move, and conveying the converter to an installation position;
s3, controlling the jack to jack, separating the steel support from the converter, then drawing out the steel support, and controlling the jack to descend until the bearing seat in the converter is placed on the bearing seat support;
s4, releasing the locking device between the folding section and the fixing section; turning the folding section downwards; and then controlling the ladle trolley to move to remove the overhead from the lower part of the converter.
The invention has the beneficial effects that: according to the high frame disclosed by the embodiment of the invention, the upright posts are arranged into the fixed section and the folding section which are hinged together, and the folding section is locked in a vertical state through the locking device so as to support the converter; after the converter is in place, the locking device between the folding section and the fixing section needs to be released, then acting force can be applied to the folding section to control the folding section to rotate downwards around the horizontal rotating shaft so as to be folded, and the overhead frame is moved away from the lower part of the converter, so that the situation that the folding section is folded under the condition that the locking device is not completely released is avoided, and the safety of the overhead frame is improved. According to the converter installation method provided by the embodiment of the invention, the high frame with high safety is adopted for transporting the converter, so that the safety of the converter installation process is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below; it is obvious that the drawings in the following description are only some embodiments described in the present invention, and that other drawings can be obtained from these drawings by a person skilled in the art without inventive effort.
FIG. 1 is a schematic structural view of an overhead frame of an embodiment of the present invention;
FIG. 2 is a schematic structural view of an overhead converter supporting structure according to an embodiment of the present invention;
FIG. 3 is a schematic view of the converter of FIG. 2 in place;
FIG. 4 is a first structural schematic of a locking device in an embodiment of the invention;
FIG. 5 is a second structural schematic view of a locking device in an embodiment of the invention;
FIG. 6 is a third structural schematic view of a locking device in an embodiment of the invention;
fig. 7 is a fourth structural diagram of the locking device in the embodiment of the invention.
The reference numbers in the figures are: 1-overhead, 2-converter, 3-ladle trolley, 4-upright post, 5-fixed section, 6-folding section, 7-horizontal rotating shaft, 8-first boss, 9-second boss, 10-first bolt, 11-first nut, 12-connecting plate, 13-supporting seat, 14-folding oil cylinder, 15-slewing mechanism, 16-jack, 17-steel support, 18-bearing seat, 19-bearing seat support, 20-track and 21-connecting bolt.
Detailed Description
In order that those skilled in the art will better understand the present invention, the following further description is provided in conjunction with the accompanying drawings and examples. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. The embodiments and features of the embodiments of the invention may be combined with each other without conflict.
Fig. 1 is a schematic structural view of an overhead structure according to an embodiment of the present invention.
Referring to fig. 1, the overhead structure provided by the embodiment of the present invention includes a ladle trolley 3 and eight columns 4 disposed on the ladle trolley 3; the upright post 4 comprises a fixed section 5 and a folding section 6; the fixed section 5 is vertically arranged and connected with the ladle trolley 3; the end part of the folding section 6 is rotatably connected with the upper end of the fixed section 5 through a horizontal rotating shaft 7, so that the folding section 6 can rotate downwards around the horizontal rotating shaft 7; the axial direction of the horizontal rotating shaft 7 is vertical to the moving direction of the ladle trolley 3; the folding device also comprises a locking device arranged between the fixed section 5 and the folding section 6 and used for locking the folding section 6 in the vertical state.
According to the overhead structure 1 provided by the embodiment of the invention, the upright posts 4 are arranged into the fixed section 5 and the folding section 6 which are hinged together, so that when the converter 2 needs to be transported, the folding section 6 can be locked in a vertical state by only using the locking device to support the converter 2; after the converter 2 is in place, the locking device between the folding section 6 and the fixing section 5 needs to be released, then acting force can be applied to the folding section 6 to control the folding section 6 to rotate downwards around the horizontal rotating shaft 7 for folding, and the overhead frame 1 is moved away from the lower part of the converter 2, so that the situation that the folding section 6 is already folded under the condition that the locking device is not completely released is avoided, and the safety of the overhead frame 1 is improved.
FIG. 2 is a schematic structural view of an overhead converter supporting structure according to an embodiment of the present invention; fig. 3 is a schematic view of the structure of fig. 2 with the converter in place. Next, the installation process of the converter 2 will be described with reference to fig. 2 and 3.
The converter installation method comprises the following steps:
s1, fitting the elevated frame 1 on the track 20 in a rolling way, and locking the folding section 6 in a vertical state; a jack 16 for jacking the converter 2 and a steel support 17 for supporting the converter 2 are placed on the top of the folding section 6;
s2, hoisting and supporting the converter 2 on the steel support 17; then controlling the ladle trolley 3 to move, and conveying the converter 2 to the installation position;
s3, controlling the jack 16 to lift, separating the steel support 17 from the converter 2, then drawing out the steel support 17, and controlling the jack 16 to descend until the bearing seat 18 in the converter 2 is placed on the bearing seat support 19;
s4, releasing the locking device between the folding section 6 and the fixing section 5; turning the folding section 6 downwards; and then controls the ladle carriage 3 to move to remove the elevated frame 1 from below the converter 2.
According to the converter installation method provided by the embodiment of the invention, the high frame 1 with high safety is adopted to transport the converter 2, after the converter 2 is in place, the locking device between the folding section 6 and the fixing section 5 needs to be released, then acting force can be applied to the folding section 6 to control the folding section 6 to rotate downwards around the horizontal rotating shaft 7 to be folded, and then the high frame 1 is moved away from the lower part of the converter 2, so that the situation that the folding section 6 is already folded under the condition that the locking device is not completely released is avoided, the safety accident that operators are injured by the folding section 6 is prevented, and the safety of the installation process of the converter 2 is improved.
According to the overhead line 1 provided by the embodiment of the invention, the fixed section 5 is connected with the folding section 6 through a hinge, and the central shaft of the hinge forms the horizontal rotating shaft 7, so that the folding section 6 can rotate downwards relative to the fixed section 5 to be folded. Preferably, the angle by which the folding segment 6 can be rotated relative to the fixed segment 5 is β, wherein β ≧ 90 °. The lengths of the fixed section 5 and the folding section 6 are set according to practical situations, and no specific reference is made here as long as it is ensured that the elevated frame 1 can be smoothly removed from the bottom of the converter 2 when the folding section 6 is folded.
The fixing section 5 may be fixedly connected to the ladle carriage 3 by a fastener such as a bolt, or may be fixedly connected to the ladle carriage 3 by welding, clamping, or the like, which is not limited herein. In one embodiment, the fixed segment 5 is rotatably mounted on the ladle carriage 3 so that the fixed segment 5 rotates about its axis. Therefore, the position of the horizontal rotating shaft 7 can be adjusted by rotating the fixed section 5, and the folding direction of the folding section 6 can be adjusted, so that the adaptability of the overhead frame 1 in a complex environment can be improved.
For example, the fixed segment 5 is mounted on the ladle carriage 3 through a swing mechanism 15. The slewing mechanism 15 comprises a slewing disc which is arranged on the ladle trolley 3 and can rotate around the vertical central line of the slewing disc, and a motor for driving the slewing disc to rotate; the lower end of the fixed section 5 is fixedly connected with the rotary disc. When the folding direction of the folding section 6 needs to be adjusted, the motor drives the rotary disc to rotate by a certain angle around the vertical central line of the rotary disc, and then the rotary disc drives the stand column 4 to rotate by a corresponding angle around the central line of the rotary disc. Of course, the fixed segment 5 may also be rotatably mounted on the ladle carriage 3 through a bearing seat structure, and is not particularly limited herein.
According to the overhead line 1 provided by the embodiment of the invention, when the folding section 6 is in a vertical state, the lower end surface of the folding section 6 is abutted against the upper end surface of the fixed section 5, so that the gravity load of the folding section 6 is mainly born by the fixed section 5.
The locking device is used for locking the folding section 6 in the vertical state, and the locking device can have various structures, and four structures are taken as examples and described below.
Fig. 4 is a first structural schematic diagram of the locking device in the embodiment of the invention.
Referring to fig. 4, the locking means includes a first boss 8 provided on the fixing section 5, a second boss 9 provided on the folding section 6, and a first fastening means for detachably connecting the first boss 8 with the second boss 9. The first fastening means includes a first bolt 10 passing through the first boss 8 and the second boss 9, and a first nut 11 screwed to an end of the first bolt 10.
The side of the upper end of the fixed section 5 is provided with a first boss 8. The first boss 8 can be connected with the fixed section 5 through fasteners such as bolts, can also be connected with the fixed section 5 through modes such as welding, clamping and the like, and can also be of an integrally formed structure with the fixed section 5. The side surface of the lower end of the folding section 6 is provided with a second boss 9. The second boss 9 can be connected with the folding section 6 through fasteners such as bolts, can also be connected with the folding section 6 through modes such as welding, clamping and the like, and can also be of an integrally formed structure with the folding section 6. And through holes for the first bolts 10 to pass through are formed in the first bosses 8 and the second bosses 9. When the folding section 6 is in the vertical state, after the first bolt 10 passes through the through holes on the first boss 8 and the second boss 9, the first nut 10 is screwed on the end of the first bolt 10, so that after the first nut 10 is screwed, the first boss 8 and the second boss 9 are firmly connected together, so as to lock the folding section 6 in the vertical state.
Of course, the first fastening means may further comprise a stud passing through the first boss 8 and the second boss 9, and a nut screwed at both ends of the stud.
FIG. 5 is a second structural schematic view of a locking device in an embodiment of the invention;
referring to fig. 5, the locking device includes a connecting plate 12; one end of the connecting plate 12 is detachably connected with the fixed section 5; the other end of the connecting plate 12 is detachably connected to the folding section 6. And two ends of the connecting plate 12 are detachably connected with the fixed section 5 and the folding section 6 through connecting bolts 21 respectively. The connecting plate 21 is provided with a through hole for the connecting bolt 21 to pass through, the fixed section 5 is provided with an internal thread hole in threaded connection with the connecting bolt 21, and the folding section 6 is provided with an internal thread hole in threaded connection with the connecting bolt 21. When the folding section 6 is in the vertical state, the connecting plate 12 is placed at the connecting position of the fixed section 5 and the folding section 6, at least one connecting bolt 21 penetrates through a through hole at the lower end of the connecting plate 12 and then is in threaded connection with the fixed section 5, and at least one connecting bolt 21 penetrates through a through hole at the upper end of the connecting plate 12 and then is in threaded connection with the folding section 6, so that the folding section 6 is locked in the vertical state.
FIG. 6 is a third structural schematic view of a locking device in an embodiment of the invention;
referring to fig. 6, the locking device comprises a supporting seat 13 mounted on the fixed section 5, and a folding cylinder 14 with one end hinged to the supporting seat 13 and the other end hinged to the folding section 6; the folding oil cylinder 14 is used for driving the folding section 6 to rotate relative to the fixed section 5 and locking the folding section 6 in a vertical state.
The supporting seat 13 can be connected with the fixed section 5 through fasteners such as bolts, can also be connected with the fixed section 5 through modes such as welding and clamping, and can also be of an integrally formed structure with the fixed section 5. The cylinder body of the folding oil cylinder 14 is hinged with the supporting seat 13, and the piston rod of the folding oil cylinder 14 is hinged with the folding section 6. In another embodiment, the cylinder body of the folding cylinder 14 is hinged to the folding section 6, and the piston rod of the folding cylinder 14 is hinged to the supporting seat 13. When the folding section 6 needs to be locked in the vertical state, a piston rod of the folding oil cylinder 14 extends to further control the folding section 6 to rotate upwards relative to the fixed section 5, and when the folding section 6 is in the vertical state, the folding oil cylinder 14 stops working to further lock the folding section 6 in the vertical state; when the folding section 6 needs to be folded, the piston rod of the folding oil cylinder 14 is contracted, and the folding section 6 is controlled to rotate downwards relative to the fixed section 5 so as to fold the folding section 6.
Fig. 7 is a fourth structural diagram of the locking device in the embodiment of the invention.
Referring to fig. 7, the locking device includes a first boss 8 disposed on the fixing section 5, a second boss 9 disposed on the folding section 6, and a first fastening device for detachably connecting the first boss 8 with the second boss 9; also comprises a connecting plate 12; one end of the connecting plate 12 is detachably connected with the fixed section 5; the other end of the connecting plate 12 is detachably connected with the folding section 6; the folding device also comprises a supporting seat 13 arranged on the fixed section 5 and a folding oil cylinder 14, wherein one end of the folding oil cylinder is hinged with the supporting seat 13, and the other end of the folding oil cylinder is hinged with the folding section 6; the folding oil cylinder 14 is used for driving the folding section 6 to rotate relative to the fixed section 5 and locking the folding section 6 in a vertical state. Through set up multiple locking device between folding section 6 and canned paragraph 5, improved stability and fastness when locking folding section 6 at vertical state to can also realize controlling folding section 6 and rotate convenient operation for canned paragraph 5 through folding hydro-cylinder 14.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. An elevated frame comprises a ladle trolley (3) and eight upright posts (4) arranged on the ladle trolley (3); the device is characterized in that the upright post (4) comprises a fixed section (5) and a folding section (6); the fixed section (5) is vertically arranged and connected with the ladle trolley (3); the end part of the folding section (6) is rotatably connected with the upper end of the fixed section (5) through a horizontal rotating shaft (7), so that the folding section (6) can rotate downwards around the horizontal rotating shaft (7); the axial direction of the horizontal rotating shaft (7) is vertical to the moving direction of the ladle trolley (3); the folding device also comprises a locking device arranged between the fixed section (5) and the folding section (6) and used for locking the folding section (6) in a vertical state.
2. An elevated frame as claimed in claim 1, characterized in that the lower end surface of the folded section (6) abuts the upper end surface of the fixed section (5) when the folded section (6) is in the upright position.
3. An elevated frame as claimed in claim 2, characterized in that the locking means comprise a first projection (8) provided on the fixed section (5), a second projection (9) provided on the foldable section (6), and first fastening means for detachably connecting the first projection (8) to the second projection (9).
4. An elevated frame as claimed in claim 3, wherein the first fastening means comprises a first bolt (10) passing through the first boss (8) and the second boss (9), and a first nut (11) screwed onto the end of the first bolt (10).
5. An overhead according to claim 2, wherein the locking means comprises a connecting plate (12); one end of the connecting plate (12) is detachably connected with the fixed section (5); the other end of the connecting plate (12) is detachably connected with the folding section (6).
6. An overhead structure as claimed in claim 2, wherein the locking means comprises a support base (13) mounted on the fixed section (5), and a folding cylinder (14) having one end hinged to the support base (13) and the other end hinged to the folding section (6); the folding oil cylinder (14) is used for driving the folding section (6) to rotate relative to the fixed section (5) and locking the folding section (6) in a vertical state.
7. An elevated frame as claimed in any one of claims 1 to 6 wherein the fixed section (5) is rotatably mounted on the ladle carriage (3) to allow rotation of the fixed section (5) about its axis.
8. An elevated frame as claimed in claim 7, wherein the fixed section (5) is mounted on the ladle carriage (3) by a swivel mechanism (15).
9. The converter installation method is characterized by comprising the following steps:
s1, roll-fitting the elevated frame (1) according to any one of claims 1 to 8 on the rail (20) and locking the folded section (6) in the vertical state; a jack (16) for jacking the converter (2) and a steel support (17) for supporting the converter (2) are arranged at the top of the folding section (6);
s2, hoisting the converter (2) and supporting the converter on a steel support (17); then controlling the ladle trolley (3) to move, and conveying the converter (2) to an installation position;
s3, controlling the jack (16) to jack, separating the steel support (17) from the converter (2), then drawing out the steel support (17) and controlling the jack (16) to descend until the bearing seat (18) in the converter (2) is placed on the bearing seat support (19);
s4, releasing the locking device between the folding section (6) and the fixing section (5); turning the folding section (6) downwards; then the ladle trolley (3) is controlled to move, and the elevated frame (1) is removed from the lower part of the converter (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011372885.XA CN112708722A (en) | 2020-11-30 | 2020-11-30 | Overhead and converter installation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011372885.XA CN112708722A (en) | 2020-11-30 | 2020-11-30 | Overhead and converter installation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112708722A true CN112708722A (en) | 2021-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011372885.XA Pending CN112708722A (en) | 2020-11-30 | 2020-11-30 | Overhead and converter installation method |
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| Country | Link |
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| CN (1) | CN112708722A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201358267Y (en) * | 2009-02-27 | 2009-12-09 | 中冶实久建设有限公司 | Installation rack of revolving furnace |
| CN102094106A (en) * | 2011-03-21 | 2011-06-15 | 中国十九冶集团有限公司南京分公司 | Quick installation method for large four-point suspended type converter |
-
2020
- 2020-11-30 CN CN202011372885.XA patent/CN112708722A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201358267Y (en) * | 2009-02-27 | 2009-12-09 | 中冶实久建设有限公司 | Installation rack of revolving furnace |
| CN102094106A (en) * | 2011-03-21 | 2011-06-15 | 中国十九冶集团有限公司南京分公司 | Quick installation method for large four-point suspended type converter |
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Application publication date: 20210427 |