CN220103762U - Energy-saving device for preheating scrap steel through laminar flow-to-turbulent flow of horizontal charging flue of electric arc furnace - Google Patents
Energy-saving device for preheating scrap steel through laminar flow-to-turbulent flow of horizontal charging flue of electric arc furnace Download PDFInfo
- Publication number
- CN220103762U CN220103762U CN202321666049.1U CN202321666049U CN220103762U CN 220103762 U CN220103762 U CN 220103762U CN 202321666049 U CN202321666049 U CN 202321666049U CN 220103762 U CN220103762 U CN 220103762U
- Authority
- CN
- China
- Prior art keywords
- flue
- energy
- saving device
- fixedly connected
- electric arc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 58
- 239000010959 steel Substances 0.000 title claims abstract description 58
- 238000010891 electric arc Methods 0.000 title claims abstract description 27
- 230000007246 mechanism Effects 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000003860 storage Methods 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 27
- 239000003546 flue gas Substances 0.000 abstract description 27
- 230000000694 effects Effects 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 description 9
- 239000000243 solution Substances 0.000 description 6
- 238000003723 Smelting Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Classifications
-
- 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
- Y02P10/20—Recycling
Landscapes
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Details (AREA)
Abstract
The utility model relates to the technical field of metal processing, in particular to a horizontal feeding flue layer circulation turbulence preheating scrap steel energy-saving device of an electric arc furnace, which comprises a flue, wherein a mounting mechanism is mounted on the back surface of the flue, an adjusting mechanism is mounted in the mounting mechanism, the flue comprises a main body, a limiting hole is formed in the back surface of the main body, the mounting mechanism comprises a fixed block, the fixed block is mounted in the limiting hole, the adjusting mechanism comprises a rotating rod, the rotating rod is mounted in the fixed block, one end of the rotating rod is fixedly connected with a bearing, the side wall of the bearing is fixedly connected with the inner wall of the main body, and the outer surface of the rotating rod is fixedly connected with a guide plate. According to the utility model, the high-temperature laminar flow flue gas above the flue is changed into turbulent flow flue gas through dynamic flow guiding, so that the contact area and the contact time of the high-temperature flue gas and the scrap steel are increased, and the effect of quickly preheating the scrap steel is achieved.
Description
Technical Field
The utility model relates to the field of metal processing, in particular to a horizontal charging flue laminar flow turbulent flow preheating scrap steel energy-saving device of an electric arc furnace.
Background
The Condi electric arc furnace is an energy-saving environment-friendly electric furnace, and is a unique electric furnace steelmaking process by using large steel-remaining quantity and relying on a molten pool to melt scrap steel, and the electric energy utilization rate reaches about 90%. The horizontal channel preheating mode of horizontally and continuously adding the preheated scrap steel into the electric furnace is a great characteristic of an Condy electric arc furnace, and meets the smelting process requirement of molten steel to melt the scrap steel. The preheating process is characterized in that the special online conveyor is used for continuously feeding the electric furnace, meanwhile, the waste steel conveyor is a flue of a dust removal system, waste steel is heated by the reversely flowing high-temperature flue gas through the preheating refractory fume hood, the stability of feeding the waste steel into the furnace is improved, molten steel is produced in a high-efficiency and rapid smelting period, the process is easy to match with continuous casting, the smelting electricity consumption is low, the yield of the molten steel is high, the noise is low, and the working environment is clean.
In the prior art, the horizontal channel of the Conscodi electric arc furnace is ideal in the production process, waste steel is preheated to 600 ℃, in reality, the waste steel can only be preheated to about 350 ℃ through on-site repeated on-line monitoring, the flue temperature is between 1200 and 400 ℃, the flue gas is found to be laminar through the temperature measurement, the high-temperature flue gas enters the flue gas flue from the upper part of the flue during smelting, the flue gas temperature above the flue is 1200, 1100, 1000, 800, 600 and 400 ℃ through the measurement, and the temperature below the flue is: 800 It is obvious that the actual temperature radiated to the scrap steel is not high, which is the main reason of poor scrap steel preheating effect, and the existing flue structure, high-temperature flue gas in the flue can directly enter the smoke exhaust pipeline from the top of the flue in a laminar flow mode for being discharged, the contact area between the high-temperature flue gas and the scrap steel is small, and the contact time is short, so that the scrap steel preheating effect is poor.
Disclosure of Invention
The utility model aims to solve the defects in the prior art, and provides an energy-saving device for preheating scrap steel by laminar flow turbulence of a horizontal charging flue of an electric arc furnace.
In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides an arc furnace horizontal charging flue laminar flow turbulent flow preheats steel scrap economizer, includes the flue, the back-mounted of flue has installation mechanism, installation mechanism's internally mounted has adjustment mechanism, the flue includes the main part, spacing hole has been seted up at the back of main part, installation mechanism includes the fixed block, the inside at spacing hole is installed to the fixed block, adjustment mechanism includes the dwang, the dwang is installed in the inside of fixed block, the one end fixedly connected with bearing of dwang, the lateral wall of bearing and the inner wall fixed connection of main part, the surface fixedly connected with guide plate of dwang.
As a further description of the above technical solution:
the top fixedly connected with exhaust pipe of main part, exhaust pipe's inside is linked together with the inside of main part.
As a further description of the above technical solution:
the top fixedly connected with of fixed block goes up the fixed plate, go up the fixed plate and pass through the back fixed connection of bolt and main part.
As a further description of the above technical solution:
the bottom fixedly connected with lower fixed plate of fixed block, lower fixed plate passes through the back fixed connection of bolt and main part, the bottom fixedly connected with backup pad of lower fixed plate.
As a further description of the above technical solution:
the adjusting mechanism further comprises a motor, the motor is arranged on the upper surface of the supporting plate, the output end of the motor is fixedly connected with a rotating shaft, one end of the rotating shaft, far away from the motor, is fixedly connected with a threaded connection ring, and one end of the threaded connection ring, far away from the rotating shaft, is in threaded connection with the other end of the rotating rod.
As a further description of the above technical solution:
the surface fixedly connected with sign piece of dwang, the sign piece is located the outside of main part.
As a further description of the above technical solution:
the inside of dwang has been seted up the intake cavity, the water storage cavity has been seted up to the inside of guide plate, the intake cavity with the water storage cavity is linked together, the connecting pipe is installed to the one end of dwang, the inside of connecting pipe with the inside of intake cavity is linked together, the one end that the dwang was kept away from to the connecting pipe extends to the outside of main part.
The utility model has the following beneficial effects:
1. compared with the prior art, this electric arc furnace horizontal charging flue laminar flow turbulent flow preheats steel scrap economizer, through adjustment mechanism, the motor drives the pivot rotatory when using, and then drive the dwang and rotate, can adjust the deflection angle of the inside guide plate of main part, high temperature flue gas with the flue top forms relative motion through the guide plate water conservancy diversion to the steel scrap of flue below and flue inner bottom, make the flue gas velocity increase through changing the flue cross-section accelerate the time of preheating steel scrap, compare in conventional flue structure, the inside high temperature flue gas of flue can directly enter into exhaust flue from the flue top in the form of laminar flow and discharge, high temperature flue gas is less with steel scrap area of contact, contact time is shorter, can lead to steel scrap preheating effect not good, this electric arc furnace horizontal charging flue laminar flow turbulent flow preheats steel scrap economizer makes it become turbulent flow flue gas through dynamic water conservancy diversion with the high temperature laminar flow flue gas of flue top, increase high temperature flue gas and steel scrap contact area and contact time reach the effect of preheating steel scrap fast.
2. Compared with the prior art, the horizontal charging flue layer-turning turbulence preheating scrap steel energy-saving device for the electric arc furnace has the advantages that the identification blocks are fixedly connected with the rotating rod, and when the rotating rod rotates, the identification blocks can also rotate along with the rotating rod, so that the deflection angle of the internal guide plate can be judged by observing the deflection angle of the external identification blocks, the adjustment of the angle of the guide plate is facilitated, and the preheating speed of scrap steel is improved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a horizontal charging flue layer-turning turbulence preheating scrap steel energy-saving device for an electric arc furnace according to a first view angle;
FIG. 2 is a schematic diagram of the overall structure of a horizontal charging flue layer-turning turbulence preheating scrap steel energy-saving device for an electric arc furnace according to a second view angle;
FIG. 3 is a first view internal structural section of an electric arc furnace horizontal charging flue laminar flow turbulent flow preheating scrap steel energy-saving device according to the utility model;
FIG. 4 is an enlarged view of the structure A in FIG. 3 of an energy-saving device for preheating scrap steel by laminar flow turbulence of a horizontal charging flue of an electric arc furnace;
FIG. 5 is an enlarged view of the structure of the horizontal charging flue layer-turning turbulence preheating scrap steel energy-saving device of the electric arc furnace in FIG. 3;
FIG. 6 is a second view of the internal structure of the horizontal charging flue layer-turning turbulence preheating scrap steel energy-saving device for the electric arc furnace according to the utility model.
Legend description:
1. a flue; 101. a main body; 102. a smoke exhaust duct; 103. a limiting hole; 2. a mounting mechanism; 201. a fixed block; 202. an upper fixing plate; 203. a lower fixing plate; 204. a support plate; 3. an adjusting mechanism; 301. a motor; 302. a rotating shaft; 303. a threaded connection ring; 304. a rotating lever; 305. identifying the block; 306. a deflector; 307. a bearing; 308. a water inlet cavity; 309. a water storage cavity; 310. and (5) connecting pipes.
Detailed Description
Referring to fig. 1-6, the utility model provides an energy-saving device for preheating scrap steel by horizontal charging flue layer circulation turbulence of an electric arc furnace, which comprises the following components: comprises a flue 1, a mounting mechanism 2 is arranged on the back of the flue 1, a regulating mechanism 3 is convenient to mount, the regulating mechanism 3 is arranged in the mounting mechanism 2, high-temperature flue gas in the flue can be converted into turbulent flow from laminar flow through the regulating mechanism 3, the contact area and the contact time of the high-temperature flue gas and scrap steel are increased to achieve the effect of quickly preheating the scrap steel, the mounting mechanism 2 and the regulating mechanism 3 can be arranged in a plurality of ways according to the specific condition of the flue 1, the flue 1 comprises a main body 101, the left side of the main body 101 is a connecting port which is connected with a high-temperature flue gas outlet of an electric arc furnace, the right side of the main body 101 is a feed port which is used for adding the scrap steel into the main body 101 for preheating, the scrap steel enters the main body 101 from the feed port, a limit hole 103 is formed in the back of the main body 101, the installation mechanism 2 comprises a fixed block 201, the fixed block 201 is installed in a limiting hole 103, the fixed block 201 seals the limiting hole 103, the overflow of smoke can be reduced, the adjusting mechanism 3 comprises a rotating rod 304, the rotating rod 304 is installed in the fixed block 201, the rotating rod 304 can rotate in the fixed block 201, one end of the rotating rod 304 is fixedly connected with a bearing 307, the side wall of the bearing 307 is fixedly connected with the inner wall of the main body 101, the rotating rod 304 is convenient to rotate, the outer surface of the rotating rod 304 is fixedly connected with a guide plate 306, the size of the guide plate 306 corresponds to the size of the limiting hole 103, the guide plate 306 can be horizontally placed into the main body 101 through the limiting hole 103, the rotating rod 304 can rotate, the deflection angle of the guide plate 306 in the main body 101 can be adjusted, the high-temperature flue gas above the flue 1 is guided to the lower part of the flue 1 and the scrap steel at the inner bottom of the flue 1 through the guide plate 306 to form relative motion, and the flow velocity of the flue gas is increased by changing the section of the flue 1 so as to accelerate the preheating time of the scrap steel.
The top fixedly connected with exhaust flue 102 of main part 101, the inside of exhaust flue 102 is linked together with the inside of main part 101, is convenient for high temperature flue gas to discharge.
The top fixedly connected with of fixed block 201 goes up fixed plate 202, goes up fixed plate 202 and the back fixed connection of main part 101 through the bolt, and the bottom fixedly connected with of fixed block 201 goes down fixed plate 203, and lower fixed plate 203 passes through the bolt and the back fixed connection of main part 101, is convenient for install fixed block 201 in the inside of spacing hole 103, and the bottom fixedly connected with backup pad 204 of lower fixed plate 203 is convenient for adjustment mechanism 3 installation.
The adjusting mechanism 3 further comprises a motor 301, the motor 301 is mounted on the upper surface of the supporting plate 204, the output end of the motor 301 is fixedly connected with a rotating shaft 302, one end, away from the motor 301, of the rotating shaft 302 is fixedly connected with a threaded connection ring 303, one end, away from the rotating shaft 302, of the threaded connection ring 303 is in threaded connection with the other end of a rotating rod 304, the threaded connection ring 303 is firstly fixed on the rotating shaft 302, then the other end of the rotating rod 304 is placed into the threaded connection ring 303, the rotating rod 304 can be connected with the threaded connection ring 303, and the rotating rod 304 is connected with the rotating shaft 302 through the threaded connection ring 303.
The surface fixedly connected with sign piece 305 of dwang 304, sign piece 305 are located the outside of main part 101, through sign piece 305, and sign piece 305 is in the same place with dwang 304 fixed connection, and when dwang 304 rotated, sign piece 305 also can follow the rotation together, just so can judge the deflection angle of inside guide plate 306 through the deflection angle of observing external sign piece 305, the adjustment of guide plate 306 angle of being convenient for, and then improves the preheating rate of steel scrap.
The inside of dwang 304 has been seted up intake cavity 308, the water storage cavity 309 has been seted up to the inside of guide plate 306, intake cavity 308 is linked together with water storage cavity 309, the surface of dwang 304 is provided with a plurality of openings, intake cavity 308 is linked together with water storage cavity 309 through the opening, connecting pipe 310 is installed to the one end of dwang 304, connecting pipe 310's one end is direct to be plugged into the inside intake cavity 308 of dwang 304, the clearance between is sealed through the rubber ring that has the draw-in groove structure, connecting pipe 310 can not rotate along with dwang 304, connecting pipe 310's inside is linked together with intake cavity 308, connecting pipe 310 keeps away from the one end of dwang 304 and extends to the outside of main part 101, during the use, one end that connecting pipe 310 kept away from dwang 304 is connected with the pump, through pump work, pump or injection circulating water to the inside of water storage cavity 309, can cool down guide plate 306, avoid long-time high temperature to influence guide plate 306's life.
Working principle: when the electric arc furnace horizontal charging flue layer circulation turbulence preheating waste steel energy-saving device is used, the high-temperature laminar flow flue gas above the flue 1 is changed into turbulent flow flue gas through dynamic flow guiding, the contact area between the high-temperature flue gas and the waste steel is increased, and the contact time of the high-temperature flue gas and the waste steel is increased to achieve the effect of quickly preheating the waste steel.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.
Claims (7)
1. The utility model provides an electric arc furnace horizontal charging flue laminar flow changes turbulent flow and preheats steel scrap economizer, includes flue (1), its characterized in that: the utility model provides a flue, back-mounted who installs installation mechanism (2) of flue (1), the internally mounted of installation mechanism (2) has adjustment mechanism (3), flue (1) include main part (101), spacing hole (103) have been seted up at the back of main part (101), installation mechanism (2) include fixed block (201), fixed block (201) are installed in the inside of spacing hole (103), adjustment mechanism (3) include dwang (304), the inside at fixed block (201) is installed to dwang (304), the one end fixedly connected with bearing (307) of dwang (304), the lateral wall of bearing (307) and the inner wall fixed connection of main part (101), the surface fixedly connected with guide plate (306) of dwang (304).
2. The energy-saving device for preheating scrap steel by laminar flow turbulence of horizontal charging flue of electric arc furnace according to claim 1, wherein the energy-saving device is characterized in that: the top of main part (101) fixedly connected with exhaust flue (102), the inside of exhaust flue (102) is linked together with the inside of main part (101).
3. The energy-saving device for preheating scrap steel by laminar flow turbulence of horizontal charging flue of electric arc furnace according to claim 1, wherein the energy-saving device is characterized in that: the top of fixed block (201) fixedly connected with goes up fixed plate (202), go up fixed plate (202) and the back fixed connection of main part (101) through the bolt.
4. The energy-saving device for preheating scrap steel by laminar flow turbulence of horizontal charging flue of electric arc furnace according to claim 1, wherein the energy-saving device is characterized in that: the bottom fixedly connected with of fixed block (201) is fixed plate (203) down, fixed plate (203) pass through the back fixed connection of bolt and main part (101), the bottom fixedly connected with backup pad (204) of fixed plate (203) down.
5. The energy-saving device for preheating scrap steel by laminar flow turbulence of horizontal charging flue of electric arc furnace according to claim 4, wherein: the adjusting mechanism (3) further comprises a motor (301), the motor (301) is mounted on the upper surface of the supporting plate (204), the output end of the motor (301) is fixedly connected with a rotating shaft (302), one end, away from the motor (301), of the rotating shaft (302) is fixedly connected with a threaded connection ring (303), and one end, away from the rotating shaft (302), of the threaded connection ring (303) is in threaded connection with the other end of the rotating rod (304).
6. The energy-saving device for preheating scrap steel by laminar flow turbulence of horizontal charging flue of electric arc furnace according to claim 1, wherein the energy-saving device is characterized in that: the outer surface of the rotating rod (304) is fixedly connected with a marking block (305), and the marking block (305) is positioned on the outer side of the main body (101).
7. The energy-saving device for preheating scrap steel by laminar flow turbulence of horizontal charging flue of electric arc furnace according to claim 1, wherein the energy-saving device is characterized in that: the inside of dwang (304) has seted up intake cavity (308), the inside of guide plate (306) has seted up water storage cavity (309), intake cavity (308) with water storage cavity (309) are linked together, connecting pipe (310) are installed to the one end of dwang (304), the inside of connecting pipe (310) with the inside of intake cavity (308) is linked together, the one end that dwang (304) was kept away from to connecting pipe (310) extends to the outside of main part (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321666049.1U CN220103762U (en) | 2023-06-28 | 2023-06-28 | Energy-saving device for preheating scrap steel through laminar flow-to-turbulent flow of horizontal charging flue of electric arc furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321666049.1U CN220103762U (en) | 2023-06-28 | 2023-06-28 | Energy-saving device for preheating scrap steel through laminar flow-to-turbulent flow of horizontal charging flue of electric arc furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220103762U true CN220103762U (en) | 2023-11-28 |
Family
ID=88873600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321666049.1U Active CN220103762U (en) | 2023-06-28 | 2023-06-28 | Energy-saving device for preheating scrap steel through laminar flow-to-turbulent flow of horizontal charging flue of electric arc furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220103762U (en) |
-
2023
- 2023-06-28 CN CN202321666049.1U patent/CN220103762U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1594614A (en) | Direct reduction process for liquid high lead skim of oxygen bottom blowing furnace and special reducing furnace | |
| CN220103762U (en) | Energy-saving device for preheating scrap steel through laminar flow-to-turbulent flow of horizontal charging flue of electric arc furnace | |
| CN210085541U (en) | Energy-efficient lead refining device | |
| CN2414854Y (en) | Three-roller planetary pipe mill | |
| CN105937854A (en) | Application of air cooling technology to electric furnace | |
| CN207881469U (en) | Tunnel type aluminium smelting furnace group with illumination monitoring equipment | |
| CN211005475U (en) | Oxygen lance fixing device in steel smelting process | |
| CN204125359U (en) | A kind of blast furnace hot molten slag mineral wool production unit | |
| CN104326656A (en) | Blast furnace thermal-state slag mineral wool producing device | |
| CN2217174Y (en) | Fluidised bed cooling dross device | |
| CN201587969U (en) | Continuous degassing system for aluminium liquid heat preserving furnace | |
| CN2477957Y (en) | Appts. for removing high temp cinder | |
| CN216005613U (en) | Pool bottom air cooling device of float glass kiln | |
| CN219283938U (en) | Smelting furnace with good heat preservation effect | |
| CN214557351U (en) | Long casting trough temperature control device for copper alloy casting blank | |
| CN205299514U (en) | Rotatory efflux oxygen rifle of supersonic speed and application apparatus | |
| CN219328327U (en) | Tail gas recycling device for annealing furnace | |
| CN204125355U (en) | A kind of mineral wool production unit | |
| CN218625496U (en) | Natural gas oxygen-enriched side-blown furnace tuyere for molten pool | |
| CN204211645U (en) | A kind of blast furnace hot molten slag mineral wool preparation system | |
| CN113624017B (en) | Mushroom head water-cooled jacket for metallurgical kiln | |
| CN220524640U (en) | Copper flash furnace rotary-floating smelting concentrate spray nozzle with newly increased wind guide cone | |
| CN219714056U (en) | Smelting furnace with high smelting efficiency | |
| CN207515556U (en) | Tunnel induced air type aluminium smelting furnace group | |
| CN220554833U (en) | Ladle refining furnace dust removal mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No.6 Jianchang Road, biting Town, Shuangqiao Economic Development Zone, Dazu District, Chongqing 400900 Patentee after: Chongqing Zuhang Vanadium Titanium Steel Group Co.,Ltd. Country or region after: China Address before: No.6 Jianchang Road, biting Town, Shuangqiao Economic Development Zone, Dazu District, Chongqing 400900 Patentee before: Chongqing zuhang Steel Co.,Ltd. Country or region before: China |
|
| CP03 | Change of name, title or address |