CN107034333B - The installation of converter oxygen gun trapped orbit, aligning method - Google Patents
The installation of converter oxygen gun trapped orbit, aligning method Download PDFInfo
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- CN107034333B CN107034333B CN201710252137.XA CN201710252137A CN107034333B CN 107034333 B CN107034333 B CN 107034333B CN 201710252137 A CN201710252137 A CN 201710252137A CN 107034333 B CN107034333 B CN 107034333B
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- trapped orbit
- installation
- centering
- oxygen
- guide rail
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- 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
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- 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
- C21C5/4606—Lances or injectors
- C21C5/462—Means for handling, e.g. adjusting, changing, coupling
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Arc Welding In General (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The present invention is a kind of installation of converter oxygen gun trapped orbit, aligning method, belongs to the installation method of pneumatic steelmaking equipment, it is characterized in that：The installation of the converter oxygen gun trapped orbit, aligning method in ground surface platform using carrying out the group of trapped orbit to, welding, it is again that trapped orbit integral hoisting is in place, preliminary centering first is carried out to the installation site of trapped orbit, on the basis of trapped orbit preliminary centering, then the on-line checking of track installation precision, centering are fixed using dedicated detection instrument, ensure accuracy requirement when oxygen rifle work, then fix trapped orbit and steel column, completes the installment work of oxygen rifle trapped orbit；Its construction procedure is：One, the setting of base point of installation；Two, the group pair of trapped orbit and lifting；Three, Working rack is set up；Four, detection device is set, to installation accuracy on-line checking, the centering of trapped orbit；Reduce security risk and labor intensity, reduce construction cost, ensure that construction speed.
Description
Technical field
The invention belongs to the installation methods of pneumatic steelmaking equipment, more particularly, to a kind of installation of converter oxygen gun track, centering
Method.
Background technology
In pneumatic steelmaking, the trapped orbit of oxygen rifle is that completion oxygen gun body declines, fixed point blows and vertical motion institute is required
One of device, oxygen lance lifting bogie is under the guiding and constraint of trapped orbit, and oxygen rifle is accurately positioned when completing pneumatic steelmaking,
The work efficiency that oxygen rifle blows when converter smelting is set to reach optimum state.
The trapped orbit of oxygen rifle presses layout design, is generally arranged at the side-walls of the oxygen rifle platform of the high-rise workshop of steel-making, and
The setting of sky form is faced in four, only relies on and is parallel to two steel columns of oxygen rifle mesa sidewalls to being fixed, the trapped orbit of oxygen rifle
Installation belong to high-altitude and face side operation, be easy to happen equipment and personnel safety hidden danger, meanwhile, working at height often results in construction effect
Rate is low, directly restricts construction speed.
Currently, installation, aligning method about converter oxygen gun trapped orbit, retrieve the Patent design of similar title；Such as
" steel-making oxygen rifle fixes guide rail group assembly/installation method " that China national Patent Office announces on July 27th, 2016, publication No.
CN105803154A, but it mainly introduces the assembling of oxygen rifle trapped orbit and common installation method, exists with this method use
The technical solution of line installation detection is different.
Invention content
The purpose of the present invention is to propose to a kind of installation of converter oxygen gun trapped orbit, aligning methods, reduce oxygen rifle retaining rail
The security risk of road installation, mitigates the labor intensity of worker, reduces construction cost, improves construction efficiency, ensures construction speed.
To achieve the above object, a kind of installation of converter oxygen gun trapped orbit, aligning method, it is characterized in that：The converter oxygen
The installation of rifle trapped orbit, aligning method in ground surface platform using carrying out the group of trapped orbit to, welding, then by trapped orbit
Integral hoisting is in place, and first carry out preliminary centering to the installation site of trapped orbit connects on the basis of trapped orbit preliminary centering
It and the on-line checking of track installation precision, centering is fixed using dedicated detection instrument, it is ensured that precision when oxygen rifle works
Then demand fixes trapped orbit and steel column, complete the installment work of oxygen rifle trapped orbit.
The converter oxygen gun trapped orbit includes the left steel of two guide rails of left rail, right guide rail and fixed left and right being arranged symmetrically
Column, right steel column and connecting plate, holder, and this left steel column, right steel column have been mounted on horizontal guide rail when workshop steel structure is installed
The preceding downside of beam and centering finishes.
The installation of converter oxygen gun trapped orbit proposed by the invention, aligning method, construction procedure are：One, base is installed
Setting on schedule；Two, the group pair of trapped orbit and lifting；Three, Working rack is set up；Four, detection device is set, to trapped orbit
Installation accuracy on-line checking, centering.
Wherein：
One, the setting of base point of installation：
To have installed, the center for the flue oxygen rifle mouth that centering finishes as foundation, by the work centre of oxygen gun body by flue
The position of center line of oxygen rifle mouth is moved to by precision theodolite on the inspection platform below the center line of trapped orbit, as
Check the centering reference center line of the longitudinally, laterally centerline deviation of trapped orbit.
Two, the group pair of trapped orbit and lifting：
The trapped orbit includes left rail, right guide rail and temporary support, this left rail, right guide rail usually point three sections of portions
Part is transported to construction site, it is contemplated that the installation category of the trapped orbit faces side operation, horizontal smart using being arranged in facility floor
Degree meets the steel structure platform of trapped orbit group reload request, and according to design document and code requirement, first in group to being put on platform
The assembled full-page proof for setting out trapped orbit is then required in strict accordance with job specfication, and using general technique, track is fixed
Left rail, right guide rail group pair, add support again between left rail, right guide rail, left rail, right guide rail consolidated support
It is tailor-made integral with lower assembly, trapped orbit is formed, which is made, and then, utilizes workshop high-rise steel structure
The furnace roof of upper setting is driven a vehicle, this entirety trapped orbit is lifted to on-station position, general technique is then used, rail is fixed
The absolute altitude in road, the preliminary centering of center, then, by being welded on left steel column, the connecting plate on right steel column respectively with it is right
Left rail, the right guide rail answered carry out spot welding and are fixed temporarily.
Three, Working rack is set up：
The length of the left rail, right guide rail is 20m, and the gauge between the left rail and right guide rail is 4m,
The precision centering of track is fixed online for convenience of operating personnel, Working rack is set up at scene, before left steel column, right steel column
On side, it is uniformly arranged lateral holder from top to bottom, the spacing of adjacent stent can be 300mm two-by-two, and the holder can
It is made of steel pipe, construction worker's configuration required safety belt protective device when operation.
Four, detection device is set, to installation accuracy on-line checking, the centering of trapped orbit：
1), detection device is set：The detection device is homemade detection instrument, and the detection device is in H fonts,
The detection device includes cross bar, left montant and right montant, is welded left montant in the left end of the cross bar, on the right side of cross bar
The right montant that is welded is held, and makes the distance between the left side of left montant and the right side of right montant than in left rail and right guide rail
Design between side is opened away from small 0.5 ㎜, and the length of this left montant and right montant can be the ㎜ of 200 ㎜~300, this cross bar can be used
The round steel of a diameter of 40 ㎜ is made, and the round steel that a diameter of 40 ㎜ can be used in this left montant and right montant is made, the detection device
As the benchmaring stick to move up and down between left rail and the inside of right guide rail.
2) center line, is marked on the center of the cross bar of the detection device, vertical as trapped orbit is looked for
Center line, the online centering for next step trapped orbit work.
3), according to oxygen gun body work design requirement, first to oxygen gun body work oxygen rifle enter flue oxygen rifle mouth position,
It waits for that oxygen blast position, the trapped orbit section at oxygen blast position carry out detection, centering and the fixation of installation accuracy, takes in left steel column, right steel
A skilled worker is arranged on column respectively, this detection device (i.e. benchmaring stick), which is first moved to oxygen gun body, enters flue oxygen rifle mouth
On the position of height, line pendant is hung on the center line of the detection device, checks and be previously disposed in the benchmark on inspection platform
Deviation amplitude (i.e. deviation) between center line such as surveys deviation and is more than standard deviation value, deviation is carried out using jack
The micro adjustment of side rails (first grinds the spot welded joint of connecting plate and corresponding rails that the adjustment is put with electric angle grinder before adjustment
Open), it, will after the deviation between reference center's line on the center line and inspection platform in detection device reaches code requirement
Left rail section, right guide rail section herein is formally welded with the connecting plate on left steel column, right steel column, completes trapped orbit Duan An herein
Fill the centering of precision；This detection device is moved to the position that oxygen gun body waits for oxygen blast position, oxygen blast position again, uses same side
Method, treats oxygen blast position, the trapped orbit section at oxygen blast position carries out precision centering and fixation, and so on, complete oxygen gun body work
The oxygen rifle of work enters flue oxygen rifle mouth position, waits for oxygen blast position, the installation accuracy of trapped orbit section at oxygen blast position etc. at privileged sites
Centering and fixed work be then sequentially completed centering, the fixation of the top and bottom of trapped orbit.
4), after track installation to be fixed, layer and section, which synchronizes, from top to bottom removes temporary support and holder.
The installation of converter oxygen gun trapped orbit proposed by the invention, aligning method reduce the installation of oxygen rifle trapped orbit
Security risk, alleviate the labor intensity of worker, reduce construction cost, improve construction efficiency, ensure that construction speed.
The installation of converter oxygen gun trapped orbit proposed by the present invention, aligning method are done into one in conjunction with drawings and examples
Step description.
Description of the drawings
Schematic front view when Fig. 1 is the installation of converter oxygen gun trapped orbit proposed by the invention, aligning method uses.
Left view schematic diagram when Fig. 2 is the installation of converter oxygen gun trapped orbit proposed by the invention, aligning method uses.
Fig. 3 is the A-A schematic cross-sectional views in Fig. 2.
In Fig. 1, Fig. 2, Fig. 3：1, horizontal guide rail beam 2-1, left steel column 2-2, right steel column 3-1, left rail 3-2, right guide rail
4, connecting plate 5, center line 6, holder 7, flue oxygen rifle mouth 8, detection device 9, support
Specific implementation mode (embodiment)
Guangdong 350t steelmaking converter projects install oxygen using converter oxygen gun trapped orbit aligning method proposed by the present invention
Rifle trapped orbit.
Project overview：Oxygen rifle trapped orbit is arranged the side-walls in converter high level platform about 50m, specified of furnace roof driving
Weight is 50t, oxygen rifle left rail, right guide rail length be 18420mm, the left rail, right guide rail inside between spacing
For 2371mm, net weight amount is about 6618Kg.
Construction procedure is：
Step 1: the setting of base point of installation：(as shown in Figure 1 and Figure 2)
To have installed, the center for the flue oxygen rifle mouth 7 that centering finishes as foundation, by the work centre of oxygen gun body by flue
The position of center line of oxygen rifle mouth 7 is moved between left rail 3-1 and right guide rail 3-2 by precision theodolite below center line
On inspection platform, the centering reference center line as the longitudinally, laterally centerline deviation for checking trapped orbit.
Step 2: group pair and the lifting of trapped orbit：(as shown in Figure 1 and Figure 2)
The trapped orbit includes left rail 3-1, right guide rail 3-2 and interim support 9, this left rail 3-1, right guide rail
3-2 usually point three sections of components are transported to construction site, it is contemplated that the installation category of the trapped orbit faces side operation, using in workshop
The steel structure platform that horizontal accuracy meets trapped orbit group reload request is set, and according to design document and code requirement, first on face
It sets out the assembled full-page proof of trapped orbit to being put on platform in group and is then required in strict accordance with job specfication, using general work
Skill is fixed the left rail 3-1 of track, the group pair of right guide rail 3-2, branch is added again between left rail 3-1, right guide rail 3-2
Support 9, which is made of the angle steel of L75, and left rail 3-1, right guide rail 3-2 are assembled under being welded and fixed of temporary support 9
One is whole, forms trapped orbit, then, is driven a vehicle using the furnace roof being arranged in workshop high-rise steel structure, by this whole trapped orbit
Lifting then uses general technique, the absolute altitude of track, the preliminary centering of center is fixed to on-station position, then,
By being welded on left steel column 2-1, (this left steel column 2-1, right steel column 2-2 have been installed right steel column 2-2 when workshop steel structure is installed
In the preceding downside of horizontal guide rail beam 1) on connecting plate 4 respectively with corresponding right guide rail 3-1, right guide rail 3-2 carry out spot welding work face
When fix.
Step 3: setting up Working rack：(as shown in Figure 1 and Figure 2)
The length of the left rail 3-1, right guide rail 3-2 is 18.42m, the left rail 3-1 and right guide rail 3-2
Between gauge be 4m, the precision centering of track is fixed online for convenience of operating personnel, holder 6 is set up at scene, in left steel
Column 2-1, right steel column 2-2 leading flank on, be uniformly arranged lateral holder 6 from top to bottom, the spacing of adjacent stent 6 can two-by-two
For 300mm, the holder 6 can be made of steel pipe, construction worker's configuration required safety belt protective device when operation.
Step 4: setting detection device, to installation accuracy on-line checking, the centering of trapped orbit：(as shown in Figure 1, Figure 2, Fig. 3
It is shown)
1), detection device is set：The detection device 8 is homemade detection instrument, and the detection device 8 is in H words
Shape, the detection device 8 include cross bar, left montant and right montant, are welded left montant in the left end of the cross bar, in cross bar
Right end be welded right montant, and make the distance between the left side of left montant and the right side of right montant than left rail 3-1 with it is right
The design of inside between guide rail 3-2 is opened away from small 0.5 ㎜, and the length of this left montant and right montant can be the ㎜ of 200 ㎜~300,
The round steel that a diameter of 40 ㎜ can be used in this cross bar is made, and the round steel system of a diameter of 40 ㎜ can be used in this left montant and right montant
At the detection device 8 is as the benchmaring stick to move up and down between left rail 3-1 and the inside of right guide rail 3-2.
2) center line 5, is marked on the center of the cross bar of the detection device 8, as the vertical of trapped orbit
Centering center line, the online centering for next step trapped orbit work.
3, according to oxygen gun body work design requirement, first to oxygen gun body work oxygen rifle enter 7, flue oxygen rifle mouth,
It waits for that oxygen blast position, the trapped orbit section at oxygen blast position carry out detection, centering and the fixation of installation accuracy, takes on left steel column 2-1, the right side
A skilled worker is arranged on steel column 2-2 respectively, this detection device 8 (i.e. benchmaring stick), which is first moved to oxygen gun body, enters flue
On the position of 7 height of oxygen rifle mouth, line pendant is hung on the center line 5 in detection device 8, checks and be previously disposed in inspection platform
On reference center's line between deviation amplitude, such as survey deviation and be more than standard deviation value, deviation side is carried out using jack
The micro adjustment of guide rail (first grinds connecting plate 4 and the spot welded joint of corresponding rails that the adjustment is put with electric angle grinder before adjustment
Open), after the deviation between reference center's line on the center line 5 in detection device 8 and inspection platform reaches code requirement,
Left and right guide rail section herein is formally welded with the connecting plate 4 on left steel column 2-1, right steel column on 2-2, completes retaining rail herein
The centering of road installation accuracy；This detection device 8 is moved to the position that oxygen gun body waits for oxygen blast position, oxygen blast position again, using same
Method, treat oxygen blast position, the trapped orbit section at oxygen blast position carries out precision centering and fixation, and so on, complete oxygen rifle rifle
The oxygen rifle of body running enters 7, flue oxygen rifle mouth, waits for oxygen blast position, the installation of trapped orbit section at oxygen blast position etc. at privileged sites
Then the centering of precision and fixed work are sequentially completed centering, the fixation of trapped orbit top and bottom.
4), after track installation to be fixed, layer and section, which synchronizes, from top to bottom removes interim support 9 and holder 6.
Claims (7)
1. a kind of installation of converter oxygen gun trapped orbit, aligning method, it is characterized in that：The installation of the converter oxygen gun trapped orbit,
Aligning method is then in place by trapped orbit integral hoisting using carrying out the group of trapped orbit in ground surface platform to, welding, first right
The installation site of trapped orbit carries out preliminary centering, on the basis of trapped orbit preliminary centering, then uses dedicated detection
The on-line checking of track installation precision, centering is fixed in tool, it is ensured that accuracy requirement when oxygen rifle works, then by retaining rail
Road is fixed with steel column, completes the installment work of oxygen rifle trapped orbit；
The converter oxygen gun trapped orbit include two guide rails of left rail, right guide rail and fixed left and right the left steel column being arranged symmetrically,
Right steel column and connecting plate, holder, before this left steel column, right steel column have been mounted on horizontal guide rail beam when workshop steel structure is installed
Downside and centering finishes；
A kind of installation of converter oxygen gun trapped orbit, aligning method, construction procedure are：One, the setting of base point of installation；Two,
The group pair of trapped orbit and lifting；Three, Working rack is set up；Four, detection device is set, it is online to the installation accuracy of trapped orbit
Detection, centering；
Wherein：
One, the setting of base point of installation：
To have installed, the center for the flue oxygen rifle mouth (7) that centering finishes as foundation, by the work centre of oxygen gun body by flue oxygen
The position of center line of muzzle (7) moves to the center line between left rail (3-1) and right guide rail (3-2) by precision theodolite
On the inspection platform of lower section, the centering reference center line of the deviation as the longitudinally, laterally center line for checking trapped orbit；
Two, the group pair of trapped orbit and lifting：
The trapped orbit includes left rail (3-1), right guide rail (3-2) and interim support (9), the left rail (3-1), the right side
Guide rail (3-2) usually point three sections of components are transported to construction site, it is contemplated that the installation category of the trapped orbit faces side operation, using
Horizontal accuracy is set in facility floor and meets the steel structure platform of trapped orbit group reload request, and is wanted according to design document and specification
It asks, first sets out the assembled full-page proof of trapped orbit to being put on platform in group and then required in strict accordance with job specfication, use is general
Technique, the left rail (3-1) of track, the group pair of right guide rail (3-2) is fixed, in left rail (3-1) and right guide rail (3-2)
Between add support (9) again, left rail (3-1), right guide rail (3-2) is assembled integral under being welded and fixed of support (9),
Trapped orbit is formed, then, is driven a vehicle using the furnace roof being arranged in workshop high-rise steel structure, this entirety trapped orbit is lifted to just
Position position, then uses general technique, the absolute altitude of track, the preliminary centering of center is fixed, then, by having welded
Be connected on left steel column (2-1), the connecting plate (4) on right steel column (2-2) respectively with corresponding left rail (3-1), right guide rail (3-2) into
Row spot welding is fixed temporarily；
Three, Working rack is set up：
The length of the left rail (3-1), right guide rail (3-2) is 20m, between this left rail (3-1) and right guide rail (3-2)
Gauge be 4m, the precision centering of track is fixed online for convenience of operating personnel, Working rack is set up at scene, in left steel column
On the leading flank of (2-1), right steel column (2-2), it is uniformly arranged lateral holder (6) from top to bottom, construction operation people when operation
The required safety belt protective device of member's configuration；
Four, detection device is set, to installation accuracy on-line checking, the centering of trapped orbit；
1), detection device is set：The detection device (8) is homemade detection instrument, and the detection device (8) is in H words
Shape, the detection device (8) include cross bar, left montant and right montant, are welded left montant in the left end of the cross bar, in cross
The right end of bar is welded right montant, and makes the distance between the left side of left montant and the right side of right montant than left rail (3-1)
Design between the inside of right guide rail (3-2) is opened away from small 0.5 ㎜, which is used as and is led with the right side in left rail (3-1)
The benchmaring stick to move up and down between the inside of rail (3-2)；
2) center line (5), is marked on the center of the cross bar of the detection device (8), as the vertical of trapped orbit
Centering center line, the online centering for next step trapped orbit work；
3), according to oxygen gun body work design requirement, first to oxygen gun body work oxygen rifle enter flue oxygen rifle mouth (7) position,
It waits for that oxygen blast position, the trapped orbit section at oxygen blast position carry out detection, centering and the fixation of installation accuracy, takes at left steel column (2-1)
With a skilled worker is arranged on right steel column (2-2) respectively, by detection device (8) the i.e. benchmaring stick be first moved to oxygen gun body into
On the position for entering flue oxygen rifle mouth (7) height, line pendant is hung on the center line (5) in detection device (8), is checked and was previously set
The deviation between reference center's line on inspection platform is set, deviation is such as surveyed and is more than standard deviation value, using jack
The micro adjustment of deviation side rails is carried out, and the connecting plate (4) for first adjustment being put before adjustment and the spot welded joint of respective track are used
Electric angle grinder mill is opened, the deviation between the center line (5) in detection device (8) and reference center's line on inspection platform
After reaching code requirement, formally with the connecting plate (4) on left steel column (2-1), right steel column (2-2) by left and right guide rail section herein
Welding, completes the centering of trapped orbit installation accuracy herein, then by the detection device (8) be moved to oxygen gun body wait for oxygen blast position,
Oxygen blast position is treated, the trapped orbit section at oxygen blast position carries out precision centering and solid using same method in the position of oxygen blast position
It is fixed, and so on, the oxygen rifle for completing oxygen gun body work enters flue oxygen rifle mouth (7) position, waits for oxygen blast position, is at oxygen blast position special
Then the centering of the installation accuracy of trapped orbit section at position and fixed work are sequentially completed trapped orbit top and bottom
Centering, fixation；
4), after track installation to be fixed, layer and section, which synchronizes, from top to bottom removes interim support (9) and holder (6).
2. the installation of converter oxygen gun trapped orbit according to claim 1, aligning method, it is characterised in that the support (9)
It is made of angle steel.
3. the installation of converter oxygen gun trapped orbit according to claim 1, aligning method, it is characterised in that adjacent branch two-by-two
The spacing of frame (6) is 300mm.
4. the installation of converter oxygen gun trapped orbit according to claim 1, aligning method, it is characterised in that the holder
(6) it is made of steel pipe.
5. the installation of converter oxygen gun trapped orbit according to claim 1, aligning method, it is characterised in that this left montant and
The length of right montant is the ㎜ of 200 ㎜~300.
6. the installation of converter oxygen gun trapped orbit according to claim 1, aligning method, it is characterised in that this cross bar uses
The round steel of a diameter of 40 ㎜ is made.
7. the installation of converter oxygen gun trapped orbit according to claim 1, aligning method, it is characterised in that this left montant and
The round steel that right montant is all made of a diameter of 40 ㎜ is made.
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| CN201710252137.XA CN107034333B (en) | 2017-04-18 | 2017-04-18 | The installation of converter oxygen gun trapped orbit, aligning method |
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| CN201710252137.XA CN107034333B (en) | 2017-04-18 | 2017-04-18 | The installation of converter oxygen gun trapped orbit, aligning method |
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| CN107034333B true CN107034333B (en) | 2018-10-02 |
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| CN110984637B (en) * | 2019-12-09 | 2021-02-19 | 中国十七冶集团有限公司 | Steel structure modular installation method for steelmaking oxygen lance valve station |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105345285A (en) * | 2015-09-30 | 2016-02-24 | 中国二十二冶集团有限公司 | Method and tool for mounting upper rail in overhead position in narrow and small space |
| CN105755204A (en) * | 2016-04-13 | 2016-07-13 | 中国十七冶集团有限公司 | Mounting method of converter oxygen lance equipment |
| CN105803154A (en) * | 2016-04-13 | 2016-07-27 | 中国十七冶集团有限公司 | Assembling method for fixing guide rail of steel-making oxygen lance |
-
2017
- 2017-04-18 CN CN201710252137.XA patent/CN107034333B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105345285A (en) * | 2015-09-30 | 2016-02-24 | 中国二十二冶集团有限公司 | Method and tool for mounting upper rail in overhead position in narrow and small space |
| CN105755204A (en) * | 2016-04-13 | 2016-07-13 | 中国十七冶集团有限公司 | Mounting method of converter oxygen lance equipment |
| CN105803154A (en) * | 2016-04-13 | 2016-07-27 | 中国十七冶集团有限公司 | Assembling method for fixing guide rail of steel-making oxygen lance |
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