CN104654806A - Graphite electrode length jointing mechanism for metallurgic electric furnace - Google Patents
Graphite electrode length jointing mechanism for metallurgic electric furnace Download PDFInfo
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- CN104654806A CN104654806A CN201510079227.4A CN201510079227A CN104654806A CN 104654806 A CN104654806 A CN 104654806A CN 201510079227 A CN201510079227 A CN 201510079227A CN 104654806 A CN104654806 A CN 104654806A
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- electrode
- clamping device
- keeper
- spreading
- rotating disc
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention relates to a graphite electrode length jointing mechanism for a metallurgic electric furnace, which comprises a discharge electrode, a length jointing electrode, clamping mechanisms, a rotary positioning mechanism, a rotary power mechanism and a telescopic mechanism. Two sets of clamping mechanisms respectively clamp the discharge electrode and the telescopic mechanism is connected between the two sets of clamping mechanisms; the rotary positioning mechanism comprises a rotary base and a movable rotation disk which are in running fit; both the rotary base and the movable rotation disk surround the joint end of the upper part of the discharge electrode; the rotary power mechanism comprises a driver and a transmission mechanism; the transmission mechanism is in transmission connection with the rotation disk; a third set of clamping mechanism clamps the length jointing electrode and the clamping mechanism is also connected with the rotation disk by the telescopic mechanism. According to the length jointing mechanism, the clamping mechanisms and a positioning part on the rotation disk can be utilized to enable the length jointing electrode and the discharge electrode to be rapidly positioned at the joint position and then the driver drives the rotation disk to rotate so as to drive the length jointing electrode to rotate, thereby implementing threaded connection of two electrodes and rapidly completing length jointing of the electrodes; labor can be saved; working efficiency is improved.
Description
Technical field
The present invention relates to field of metallurgical equipment, particularly for the mechanism of electric furnace graphite electrode spreading.
Background technology
Can use electric furnace in field of metallurgy, the feature of electric furnace is, bell is provided with the electrode stretched in stove, electrode material is generally graphite.During electric furnace work, the molten iron electric discharge in electrode pair stove, makes molten iron in stove keep high temperature.Meanwhile because electrode is subject to high arc temperature scaling loss, the electrode discharge end in stove constantly shortens, and this just needs operation electrode constantly to feeding in stove.
In prior art, operation electrode is to the process of feeding in stove, adopt special electrode clamping mechanism to complete, electrode clamping mechanism has various ways, general principle is that the band-type brake of clamping device is looped around surrounding them, and utilize mechanical force or hydraulic coupling etc. to realize band-type brake and compress or absent-mindedness, when band-type brake compresses, electrode is jammed, when band-type brake is relaxed, electrode is released.
Operation electrode feeding or retraction needs two electrode clamping mechanisms have come, and such as, two electrode clamping mechanisms clamp electrode respectively, be also provided with telescopic oil cylinder, and the clamping device on top are connected between two clamping devices with frame.Clamping device when top unclamps electrode, the clamping device clamping electrode of bottom, and oil cylinder stretches out, and can realize electrode and stretch in stove; Contrary, oil cylinder is retracted, and can realize electrode retraction.
Existing graphite electrode product is all the cylinder with certain length, and electrode tip is designed with the screw thread be threaded, and when electric furnace continuous seepage, needs the electrode upper end relying on driving extremely being discharged by a hoisting electrode, carries out the operation of electrode spreading.Concrete, it is the electrode that manual operation special clip clamps spreading, the lower end of spreading electrode is aimed at the electrode upper end of electric discharge, then as the turn of the screw, two electrodes are tightened, this operating process workman needs to consume a large amount of muscle power, even and skilled worker also needs considerable time just two electrode contact ends can accurately be aimed at, then complete electrode spreading.
Summary of the invention
Technical problem to be solved by this invention is: the graphite electrode spreading mechanism providing a kind of metallurgical electric furnace, mechanical force can be utilized to replace manpower to carry out electrode spreading, save manpower, increase work efficiency.
The technical solution adopted for the present invention to solve the technical problems is:
The graphite electrode spreading mechanism of metallurgical electric furnace, comprise frame, sparking electrode, spreading electrode, first clamping device and the second clamping device, described first clamping device and the second clamping device clamp sparking electrode respectively, and be connected with the first telescoping mechanism between the first clamping device and the second clamping device, described first clamping device or the second clamping device are fixedly connected with frame, also comprise the 3rd clamping device, rotary positioning mechanism, revolving power mechanism and the second telescoping mechanism, described rotary positioning mechanism comprises rotating basis and rotating disc, described rotating basis and rotating disc are all arranged around the tip side of sparking electrode, rotating basis is fixedly connected with frame, be rotatably assorted between rotating basis and rotating disc, the direction of rotation of described rotating disc is identical with sparking electrode circumference, described revolving power mechanism comprises driving machine and transmission mechanism, and described transmission mechanism and rotating disc are in transmission connection, described 3rd gripper mechanism grips lives spreading electrode, and the 3rd clamping device is connected by the second telescoping mechanism with rotating disc.
Further, described rotating disc top is also provided with the first keeper, described 3rd clamping device bottom is provided with the second keeper, described first keeper and the second keeper suitable, when the first keeper is chimeric with the second keeper, the tip side of spreading electrode bottom aims at the tip side on sparking electrode top.
Further, described second keeper is platy structure, second keeper side is provided with the key block of the protrusion along spreading electrode shaft orientation layout, described first keeper is platy structure, first keeper side is provided with keyway, described key block and keyway suitable, when key block is chimeric with keyway, the tip side of spreading electrode bottom aims at the tip side on sparking electrode top.
Further, described driving machine is motor, and described transmission mechanism is the gear be arranged on motor reel, described gear and rotating disc gear drive.
Further, described first telescoping mechanism and/or the second telescoping mechanism are oil cylinder.
Further, ball or lubricating oil is provided with between described rotating basis and rotating disc.
Further, be also provided with for oil-tightening rotating seal ring between described rotating basis and rotating disc.
The invention has the beneficial effects as follows: the graphite electrode spreading mechanism of this metallurgical electric furnace, the keeper on the 3rd clamping device and rotating disc can be utilized to make spreading electrode and sparking electrode at joint location quick position, then driving machine driven rotary disc spins, and then drive the 3rd clamping device and spreading electrode rotary, realize two electrode threads to connect, complete electrode spreading fast, can manpower be saved, increase work efficiency.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of embodiment of graphite electrode spreading mechanism of metallurgical electric furnace of the present invention, eliminates frame in figure;
Fig. 2 is the enlarged diagram at the first keeper and the second keeper place in Fig. 1;
Fig. 3 be in Fig. 2 the first keeper and the second keeper place overlook cross-sectional schematic;
In figure, Reference numeral is: the first clamping device 1, second clamping device 2, the 3rd clamping device 3, second keeper 31, key block 311, rotary positioning mechanism 4, rotating disc 41, first keeper 411, keyway 412, rotating basis 44, rotating seal ring 45, revolving power mechanism 5, driving machine 51, transmission mechanism 52, first telescoping mechanism 61, second telescoping mechanism 62, sparking electrode 91, spreading electrode 92.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described: as shown in Figure 1:
The graphite electrode spreading mechanism of metallurgical electric furnace, comprise frame, sparking electrode 91, spreading electrode 92, first clamping device 1 and the second clamping device 2, described first clamping device 1 and the second clamping device 2 clamp sparking electrode 91 respectively, and be connected with the first telescoping mechanism 61 between the first clamping device 1 and the second clamping device 2, described first clamping device 1 or the second clamping device 2 are fixedly connected with frame, also comprise the 3rd clamping device 3, rotary positioning mechanism 4, revolving power mechanism 5 and the second telescoping mechanism 62, described rotary positioning mechanism 4 comprises rotating basis 44 and rotating disc 41, described rotating basis 44 and rotating disc 41 are all arranged around the tip side of sparking electrode 91, rotating basis 44 is fixedly connected with frame, be rotatably assorted between rotating basis 44 and rotating disc 41, the direction of rotation of described rotating disc 41 is identical with sparking electrode 91 circumference, described revolving power mechanism 5 comprises driving machine 51 and transmission mechanism 52, and described transmission mechanism 52 is in transmission connection with rotating disc 41, described 3rd clamping device 3 is clamped spreading electrode the 92, three clamping device 3 and is connected by the second telescoping mechanism 62 with rotating disc 41.
As shown in Figure 1, the graphite electrode spreading mechanism of metallurgical electric furnace of the present invention, can realize spreading electrode 92 without the need to manual operation and sparking electrode 91 is threaded.Wherein the first clamping device 1 and the second clamping device 2 are as the clamping device of traditional electric furnace, realize electrode clamping and loosen by mechanical force or hydraulic coupling etc.Be connected with the first telescoping mechanism 61 between first clamping device 1 and the second clamping device 2, and any one allowing in the first clamping device 1 or the second clamping device 2 is fixedly connected with frame, can realize sparking electrode 91 to feeding in stove and retraction.
So-called being fixedly connected with frame can be directly be connected with frame or be connected with parts fixing in frame.Described telescoping mechanism refers to the mechanism that can realize stretching out or retracting, and it is flexible that such as telescoping mechanism can be that oil cylinder etc. relies on hydraulic coupling to realize, or electric oil cylinder etc. relies on motor to rotate to realize parts and stretches.
Described 3rd clamping device 3, rotary positioning mechanism 4, revolving power mechanism 5 and the second telescoping mechanism 62 are mainly used in realizing being rotatably connected of spreading electrode 92 and sparking electrode 91.
Concrete, the 3rd clamping device 3 is the same with the second clamping device 2 with aforementioned first clamping device 1, for clamping or loosening spreading electrode 92.Described rotary positioning mechanism 4 is mainly used in realizing spreading electrode 92, with sparking electrode 91, relative rotation occurs, and makes both complete and is threaded.
As shown in Figure 1, rotary positioning mechanism 4 comprises rotating basis 44 and rotating disc 41, and wherein rotating basis 44 is fixedly connected with frame, and rotating disc 41 can rotate relatively with rotating basis 44.Described rotating basis 44 and rotating disc 41 are all arranged around the tip side of sparking electrode 91, and namely so-called electrode contact end is that threaded connection place occurs two electrodes.
Be rotatably assorted between rotating basis 44 and rotating disc 41, the direction of rotation of described rotating disc 41 is identical with sparking electrode 91 circumference, and rotating disc 41 can be rotated in a circumferential direction along electrode around electrode.Adopting between so-called rotating basis 44 and rotating disc 41 and be rotatably assorted, can be any common structure that can realize rotating basis 44 and freely rotate with rotating disc 41.
Can be such as, rotating basis 44 inside is provided with the pedestal inner chamber of annular, rotating disc 41 is annular and is positioned at described pedestal inner chamber, the parts of ball or other similar balls are set between rotating basis 44 and rotating disc 41, rotating basis 44 and rotating disc 41 are formed by ball and are rotatably assorted, and both are free to relative rotation.More smooth and easy in order to make to rotate between rotating basis 44 and rotating disc 41, lubricating oil can also be added between.
Such as rotating basis 44 inside is provided with the pedestal inner chamber of annular again, rotating disc 41 is annular and is positioned at described pedestal inner chamber, the excircle of rotating disc 41 and the inner periphery matched in clearance of pedestal inner chamber, and lubricating oil is set between rotating basis 44 and rotating disc 41, realize slip and be rotatably assorted.
In aforementioned several embodiment, in order to prevent oil spill between rotating basis 44 and rotating disc 41 from going out, preferably can also be provided with for oil-tightening rotating seal ring 45 between described rotating basis 44 and rotating disc 41.
Actuating unit 5 comprises driving machine 51 and transmission mechanism 52, and driving machine 51 provides rotary driving force for rotating disc 41, and the outputting power of driving machine 51 is passed to rotating disc 41 by transmission mechanism 52.
Such as, driving machine 51 can be motor, oil-burning machine etc., and transmission mechanism 52 can be mounted in the gear on motor shaft, and the circumference of rotating disc 41 is also provided with tooth, and the outputting power of driving machine 51 passes to rotating disc 41 by gear drive.
The second telescoping mechanism 62 is connected with between the 3rd clamping device 3 and rotating disc 41, when the second telescoping mechanism 62 extends, 3rd clamping device 3 pushed away from rotating disc 41, when the second telescoping mechanism 62 is retracted, 3rd clamping device 3 near rotating disc 41, and then can drive spreading electrode 92 near sparking electrode 91.
Concrete, spreading mechanism of the present invention job step can be that the second clamping device 2 is fixedly connected with frame by a support, and rotating basis 44 is fixedly connected on the support of the second clamping device 2 again; Second clamping device 2 unclamps sparking electrode 91, and the first clamping device 1 clamps sparking electrode 91 simultaneously, and the first telescoping mechanism 61 stretches out, then sparking electrode 91 can stretch in stove; Now find that electrode needs spreading, then by above spreading electrode 92 handling to sparking electrode 91, operate the second telescoping mechanism 62 and extend, the 3rd clamping device 3 then unclamped moves, be set in spreading electrode 92 outside, then clamp the 3rd clamping device 3, make it grab steady spreading electrode 92; Operate the second telescoping mechanism 62 to retract, spreading electrode 92 is contacted with each other with the screw thread of sparking electrode 91 end, then operate driving machine 51 to operate, rotating disc 41 rotates clockwise, the 3rd clamping device 3 and spreading electrode 92 thereof then can be driven to turn clockwise, spreading electrode 92 and the screw thread rotational lock of sparking electrode 91 end, namely realize two electrode threads and connect.Above-mentioned electrode spreading process is completed by machinery completely, and relative to manual operation, security and operating efficiency improve all greatly.
In above-mentioned embodiment, second telescoping mechanism 62 that is rotated through of rotating disc 41 drives the 3rd clamping device 3 to rotate, in order to make rotating disc 41 and the 3rd clamping device 3 rotary power transmission more reliable, preferably, can be that described rotating disc 41 top is also provided with the first keeper 411, described 3rd clamping device 3 bottom is provided with the second keeper 31, described first keeper 411 and the second keeper 31 suitable, when the first keeper 411 is chimeric with the second keeper 31, the tip side of spreading electrode 92 bottom aims at the tip side on sparking electrode 91 top.
In present embodiment, the first keeper 411 and the second keeper 31 can assist spreading electrode 92 and sparking electrode 91 end alignment.When the second telescoping mechanism 62 shortens, the hypotelorism of rotating disc 41 and the 3rd clamping device 3, make the hypotelorism of the first keeper 411 and the second keeper 31, when the first keeper 411 contacts with the second keeper 31 and starts chimeric, the 3rd clamping device 3 can be impelled to carry out position correction, when the first keeper 411 is completely chimeric with the second keeper 31, the joint of spreading electrode 92 bottom is just in time aimed at sparking electrode 91 upper connection, is convenient to next step screw-threaded coupling action.
In addition, when rotating disc 41 rotates, along with screw-threaded coupling, the bottom of spreading electrode 92 can progressively near sparking electrode 91, therefore preferred, first keeper 411 and the second keeper 31 still will keep chimerism after carrying out axial relative motion, make the first keeper 411 can coordinate the second telescoping mechanism 62 that the rotary power of rotating disc 41 is passed to the second keeper 31.
Concrete, such as the first keeper 411 can be the circular hole that rotating disc 41 is offered, second keeper 31 can be the little conical bar in bottom, when the second telescoping mechanism 62 shortens, second keeper 31 is along electrode axis to close first keeper 411, the tip of conical rod is inserted in the circular hole of rotating disc, and the second telescoping mechanism 62 shortens further, and conical rod stretches in the circular hole of rotating disc further.Now, if spreading electrode 92 and sparking electrode 91 end do not align, then conical rod is also for aligning circular hole, after conical rod and annular opening contacts, the side force that conical rod is subject to can be revised the 3rd clamping device 3 position, impels the bottom of spreading electrode 92 just to sparking electrode 91 top; Rotating disc 41 starts to rotate subsequently, by the traction of conical rod and the second telescoping mechanism 62, make spreading electrode 92, with sparking electrode 91, relative rotation occur, complete screw-threaded coupling, in the process of screw-threaded coupling, spreading electrode 92 lower end is gradually near sparking electrode 91 upper end, and conical rod also continues to stretch into gradually in the circular hole of rotating disc, and keeping chimerism at any time, conical rod can coordinate the second telescoping mechanism 62 that the rotary power of rotating disc 41 is passed to the 3rd clamping device 3.
Concrete, also can be, described second keeper 31 is platy structure, second keeper 31 side is provided with the key block 311 of the protrusion along spreading electrode 92 shaft orientation layout, described first keeper 411 is platy structure, and the first keeper 411 side is provided with keyway 412, and described key block 311 is suitable with keyway 412, when key block 311 is chimeric with keyway 412, the tip side of spreading electrode 92 bottom aims at the tip side on sparking electrode 91 top.
As shown in Figures 2 and 3, identical with the principle of circular hole with aforementioned conical rod, when spreading electrode 92 is vertically near sparking electrode 91, present embodiment adopts key block 311 and keyway 412 to be fitted together to realize spreading electrode 92 and aims at sparking electrode 91 joint, and after key block 311 and keyway 412 are fitted together to, rotating disc 4 rotary power can be passed to the 3rd clamping device 3.Preferred further, can be the inner surface that keyway 412 is positioned at the first keeper 411, described key block 311 be positioned at the outer surface of the second keeper 31.
Claims (7)
1. the graphite electrode spreading mechanism of metallurgical electric furnace, comprise frame, sparking electrode (91), spreading electrode (92), first clamping device (1) and the second clamping device (2), described first clamping device (1) and the second clamping device (2) clamp sparking electrode (91) respectively, and be connected with the first telescoping mechanism (61) between the first clamping device (1) and the second clamping device (2), described first clamping device (1) or the second clamping device (2) are fixedly connected with frame, it is characterized in that, also comprise the 3rd clamping device (3), rotary positioning mechanism (4), revolving power mechanism (5) and the second telescoping mechanism (62), described rotary positioning mechanism (4) comprises rotating basis (44) and rotating disc (41), described rotating basis (44) and rotating disc (41) are all arranged around the tip side of sparking electrode (91), rotating basis (44) is fixedly connected with frame, be rotatably assorted between rotating basis (44) and rotating disc (41), the direction of rotation of described rotating disc (41) is identical with sparking electrode (91) circumference, described revolving power mechanism (5) comprises driving machine (51) and transmission mechanism (52), and described transmission mechanism (52) and rotating disc (41) are in transmission connection, described 3rd clamping device (3) clamps spreading electrode (92), and the 3rd clamping device (3) is connected by the second telescoping mechanism (62) with rotating disc (41).
2. the graphite electrode spreading mechanism of metallurgical electric furnace as claimed in claim 1, it is characterized in that, described rotating disc (41) top is also provided with the first keeper (411), described 3rd clamping device (3) bottom is provided with the second keeper (31), described first keeper (411) is suitable with the second keeper (31), when the first keeper (411) is chimeric with the second keeper (31), the tip side of spreading electrode (92) bottom aims at the tip side on sparking electrode (91) top.
3. the graphite electrode spreading mechanism of metallurgical electric furnace as claimed in claim 2, it is characterized in that, described second keeper (31) is platy structure, second keeper (31) side is provided with the key block (311) along the protrusion of spreading electrode (92) shaft orientation layout, described first keeper (411) is platy structure, first keeper (411) side is provided with keyway (412), described key block (311) is suitable with keyway (412), when key block (311) is chimeric with keyway (412), the tip side of spreading electrode (92) bottom aims at the tip side on sparking electrode (91) top.
4. the graphite electrode spreading mechanism of the metallurgical electric furnace as described in claim 1,2 or 3, it is characterized in that, described driving machine (51) is motor, described transmission mechanism (52) for being arranged on the gear on motor reel, described gear and rotating disc (41) gear drive.
5. the graphite electrode spreading mechanism of the metallurgical electric furnace as described in claim 1,2 or 3, is characterized in that, described first telescoping mechanism (61) and/or the second telescoping mechanism (62) are oil cylinder.
6. the graphite electrode spreading mechanism of the metallurgical electric furnace as described in claim 1,2 or 3, is characterized in that, is provided with ball or lubricating oil between described rotating basis (44) and rotating disc (41).
7. the graphite electrode spreading mechanism of metallurgical electric furnace as claimed in claim 6, is characterized in that, be also provided with for oil-tightening rotating seal ring (45) between described rotating basis (44) and rotating disc (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510079227.4A CN104654806B (en) | 2015-02-14 | 2015-02-14 | The graphite electrode spreading mechanism of metallurgical electric furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510079227.4A CN104654806B (en) | 2015-02-14 | 2015-02-14 | The graphite electrode spreading mechanism of metallurgical electric furnace |
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| CN104654806A true CN104654806A (en) | 2015-05-27 |
| CN104654806B CN104654806B (en) | 2016-04-13 |
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| CN201510079227.4A Active CN104654806B (en) | 2015-02-14 | 2015-02-14 | The graphite electrode spreading mechanism of metallurgical electric furnace |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106975912A (en) * | 2017-04-06 | 2017-07-25 | 西安华创冶金科技有限公司 | A kind of hydraulic means |
| CN108617045A (en) * | 2018-05-03 | 2018-10-02 | 湖南镭目科技有限公司 | A kind of automatic receiving electrode equipment |
| CN110822920A (en) * | 2019-10-18 | 2020-02-21 | 张家港宏昌钢板有限公司 | Electric furnace electrode extension device |
| CN112008350A (en) * | 2019-05-28 | 2020-12-01 | 西冶科技集团股份有限公司 | Automatic electrode lengthening device |
| CN114525400A (en) * | 2021-12-31 | 2022-05-24 | 陕西聚能新创煤化科技有限公司 | Ore decomposition production method and system by using novel plasma hot blast stove |
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| US3796818A (en) * | 1972-03-16 | 1974-03-12 | Daido Steel Co Ltd | Electrode connecting apparatus for furnaces |
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| JPH0955289A (en) * | 1995-08-10 | 1997-02-25 | Daido Steel Co Ltd | Electrode connection device |
| JPH0963764A (en) * | 1995-08-16 | 1997-03-07 | Daido Steel Co Ltd | Electrode connecting device |
| CN201467507U (en) * | 2009-07-11 | 2010-05-12 | 山西太钢不锈钢股份有限公司 | Joining device of electrodes |
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| US3796818A (en) * | 1972-03-16 | 1974-03-12 | Daido Steel Co Ltd | Electrode connecting apparatus for furnaces |
| US4044199A (en) * | 1975-06-10 | 1977-08-23 | Union Carbide Corporation | Apparatus for applying torque to electrodes |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106975912A (en) * | 2017-04-06 | 2017-07-25 | 西安华创冶金科技有限公司 | A kind of hydraulic means |
| CN108617045A (en) * | 2018-05-03 | 2018-10-02 | 湖南镭目科技有限公司 | A kind of automatic receiving electrode equipment |
| CN112008350A (en) * | 2019-05-28 | 2020-12-01 | 西冶科技集团股份有限公司 | Automatic electrode lengthening device |
| CN110822920A (en) * | 2019-10-18 | 2020-02-21 | 张家港宏昌钢板有限公司 | Electric furnace electrode extension device |
| CN114525400A (en) * | 2021-12-31 | 2022-05-24 | 陕西聚能新创煤化科技有限公司 | Ore decomposition production method and system by using novel plasma hot blast stove |
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| CN104654806B (en) | 2016-04-13 |
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Effective date of registration: 20160222 Address after: 617000 East Street, Panzhihua, Sichuan, No. 108 Applicant after: Design & Research Inst Co., Ltd., Panzhihua Steel & Iron Group Address before: Panzhihua City, Sichuan Province, 617000 East Road two south of Pangang Group Engineering Technology Co Ltd Applicant before: Pan'gang Group Engineering Technology Co., Ltd. Applicant before: Design & Research Inst Co., Ltd., Panzhihua Steel & Iron Group |
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