CN115127353A - Long-life transverse air-cooled direct-current arc furnace bottom electrode - Google Patents
Long-life transverse air-cooled direct-current arc furnace bottom electrode Download PDFInfo
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- CN115127353A CN115127353A CN202210677451.3A CN202210677451A CN115127353A CN 115127353 A CN115127353 A CN 115127353A CN 202210677451 A CN202210677451 A CN 202210677451A CN 115127353 A CN115127353 A CN 115127353A
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- 238000003825 pressing Methods 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 14
- 230000001681 protective effect Effects 0.000 claims abstract description 14
- 238000009413 insulation Methods 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 238000005192 partition Methods 0.000 claims abstract description 4
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 238000002156 mixing Methods 0.000 claims description 12
- 230000008602 contraction Effects 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 230000003628 erosive effect Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 238000003723 Smelting Methods 0.000 abstract 1
- 229910001338 liquidmetal Inorganic materials 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D11/00—Arrangement of elements for electric heating in or on furnaces
- F27D11/08—Heating by electric discharge, e.g. arc discharge
- F27D11/10—Disposition of electrodes
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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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
- Y02P10/20—Recycling
Abstract
The invention belongs to the technical field of metallurgy, and relates to a long-life transverse air-cooled direct current arc furnace bottom electrode, which comprises a protective guide plate, a conical protective plate, a pressing plate, a conductive base in a furnace and a guide hole arranged on a furnace body base, wherein the protective guide plate is used for protecting an insulating plate and guiding harmful liquid; the protection guide plate, the conical protection plate and the pressing plate form a partition between the insulation plate and the ramming material in the furnace, so that the insulation plate is prevented from being eroded by penetrating liquid in the ramming material in the furnace, harmful liquid in the ramming material in the furnace flows out of the furnace from the guide holes after being guided, and the problem of erosion of the insulation plate caused by the fact that harmful liquid metal generated in the smelting process is deposited on the bottom of the furnace and accumulated is solved. Meanwhile, the radiating fins, the air-cooled guide plate, the spoiler, the conductive tube, the air-cooled jet tube and the guide induced draft tube are adopted, the radiating area is increased, and the cooling effect is enhanced by utilizing the ejector principle. The transversely arranged air-cooled jet pipe is beneficial to reducing the overall height of the bottom electrode, and solves the problems of large volume, inconvenience in use and maintenance after the bottom electrode is provided with the air-cooled jet pipe.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and relates to a long-life transverse air-cooled direct-current arc furnace bottom electrode.
Background
In the field of electric furnace steelmaking, a direct current electric arc furnace has the advantages of low electrode consumption, small voltage fluctuation and flicker, small impact on a preceding stage power grid, low power consumption, high actual input power, full stirring of a molten pool and the like, so that the direct current electric arc furnace is widely used. The bottom electrode of the electric arc furnace is embedded in the ramming mass at the bottom of the furnace, but harmful elements can gradually permeate the ramming mass in the furnace, after long-term operation, the harmful elements are concentrated at the bottom of the furnace, corrode the insulating layer of the bottom electrode, the service life of the bottom electrode is relatively short, the bottom electrode is influenced by the existing structure, the volume of the air cooling part of the auxiliary connection is large, and the whole process arrangement is influenced.
Disclosure of Invention
In view of the above, the present invention provides a long-life lateral air-cooled dc arc furnace bottom electrode, which solves the problem of erosion of harmful elements on the insulating layer of the bottom electrode.
In order to achieve the purpose, the invention provides the following technical scheme:
a long-life transverse air-cooled direct current arc furnace bottom electrode comprises a plurality of furnace internal conductive contact pins arranged in a furnace body side by side and a plurality of furnace external conductive contact pins arranged outside the furnace body, wherein the furnace external conductive contact pins and the furnace internal conductive contact pins are respectively connected to two sides of a furnace internal conductive bottom plate; the other end of the conductive contact pin outside the furnace is connected with a conductive bottom plate outside the furnace, the conductive bottom plate outside the furnace is connected with a power supply, the conductive bottom plate inside the furnace is arranged on a furnace body base, and an insulating plate covering the surface of the conductive bottom plate inside the furnace is arranged on the edge of the conductive bottom plate inside the furnace, so that the conductive bottom plate inside the furnace is electrically insulated from the furnace body base; a conical protection plate is further arranged on one side, provided with the conductive contact pin, of the conductive bottom plate in the furnace, the insulation plate is arranged on the outer side of the conical protection plate, a protection guide plate covers the outer surface of the insulation plate, a pressing plate is arranged on the conical protection plate, one end of the pressing plate is fixedly connected with the conical protection plate, and the other end of the pressing plate is pressed and attached to the protection guide plate; the protective guide plate, the conical protective plate, the pressing plate and the in-furnace conductive bottom plate form a partition between the insulating plate and the in-furnace ramming material, and the insulating plate is prevented from being corroded by penetrating liquid in the in-furnace ramming material.
Further, the conical protection plate comprises a straight plate and an inclined plate, one end of the straight plate is fixedly connected with the conductive bottom plate in the furnace, and the other end of the straight plate is fixedly connected with the inclined plate; the inclined plate is arranged above the pressing plate, and the projection length of the inclined plate along the direction of the pressing plate is greater than the length of the pressing plate.
Further, a diversion hole is formed in the furnace body base and located between the protection diversion plate and the furnace wall.
Further, an air inlet hole is formed in the conductive bottom plate outside the furnace, the wall of the air inlet hole is a conductive tube, and the conductive bottom plate outside the furnace is connected with a power supply through the conductive tube.
Furthermore, a plurality of spiral air-cooled guide plates are arranged on one side of the conductive bottom plate in the furnace, which is far away from the conductive contact pins in the furnace, an air-cooled guide groove communicated with the air inlet hole is formed between the adjacent air-cooled guide plates, and the conductive contact pins outside the furnace are uniformly divided into the corresponding air-cooled guide grooves by the air-cooled guide plates.
Furthermore, a plurality of spoilers are arranged on two sides of the air-cooled guide plate and distributed in the air-cooled guide groove at intervals.
Furthermore, a flow guide air guiding pipe communicated with the air inlet hole is arranged on the conductive pipe; the diversion induced draft pipe comprises a contraction pipe and a mixing pipe; the shrinkage tube is conical, one end of the mixing tube is connected with the conductive tube, and the other end of the mixing tube is connected with the small end of the shrinkage tube; the big end of the contraction pipe is provided with an air-cooled jet pipe used for providing high-speed cold air; the inner diameter of the mixing pipe is smaller than the diameter of the air inlet hole; the air-cooled jet pipe, the diversion induced draft pipe and the conductive pipe form an ejector, and the air speed and the air quantity of cooling air are improved.
Furthermore, the diversion induced draft tube is transversely arranged on the side wall of the conductive tube; the external air cooling equipment can be transversely arranged, and the problem that the whole equipment is inconvenient to use and maintain due to vertical arrangement is avoided.
Furthermore, a plurality of radiating fins are arranged on the conductive contact pin outside the furnace.
Furthermore, the conductive contact pin in the furnace is of a bent sheet or a spiral sheet structure and is embedded in the ramming material in the furnace. The bending or spiral structure can effectively slow down the erosion speed of molten steel to the contact pin, and can also effectively reduce the possibility of steel leakage caused by untight knotting of the ramming material.
The invention has the beneficial effects that:
1. the insulating plate is wrapped by the conical protection plate, the protection guide plate and the pressing plate, so that the insulating plate is separated from the ramming mass in the furnace, and harmful liquid in the ramming mass in the furnace is prevented from flowing into the insulating plate; meanwhile, a flow guide structure is arranged, liquid above the pressing plate is guided to the protective flow guide plate through the inclined plate and flows to the base of the furnace body, and the liquid flows out of the furnace body through the flow guide hole, so that the insulating plate is effectively protected, and the operation stability of equipment is improved.
2. According to the invention, the radiating fins are welded on the external conductive contact pin, and the spoilers are uniformly welded on two sides of the air-cooled flow guide plate in a staggered manner, so that the radiating effects of the external conductive contact pin, the external conductive bottom plate and the internal conductive bottom plate are enhanced, and the service life of equipment is prolonged.
3. According to the invention, the conductive tube is connected below the conductive bottom plate outside the furnace, cold air can be blown to the conductive contact pin outside the furnace through the diversion induced draft tube, the air volume and the air speed of the cold air are increased by utilizing the principle of the ejector, and the cooling effect is enhanced.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof.
Drawings
For a better understanding of the objects, aspects and advantages of the present invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a front view of a long life transverse air-cooled DC arc furnace bottom electrode;
FIG. 2 is a view taken along line A of FIG. 1;
FIG. 3 is a sectional view taken along line B-B of FIG. 1;
FIG. 4 is a view taken along line C of FIG. 1;
FIG. 5 is a cross-sectional view taken in rotation E-E of FIG. 4;
FIG. 6 is a cross-sectional view C-C of FIG. 3;
FIG. 7 is a schematic view of a conductive tube;
FIG. 8 is a schematic view of the base of the furnace body.
Reference numerals are as follows: 1-an in-furnace conductive contact pin; 2-ramming the material in the furnace; 3-a conical protection plate; 4-upper protective guide plate; 5-a furnace body base; 6-lower protective guide plate; 7, insulating plates; 8-conductive bottom plate in the furnace; 9-conductive contact pin outside the furnace; 10-conductive bottom plate outside the furnace; 11-a conductive tube; 12-a blind flange; 13-air cooling guide plate; 14-a spoiler; 15-a heat sink; 16-a conductive flange plate; 17-air cooling jet pipe; 18-diversion induced draft tube; 19-flow guide holes; and 20-pressing plate.
Detailed Description
The following embodiments of the present invention are provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and the specific meaning of the terms described above will be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1 to 8, the long-life electrode at the bottom of the transverse air-cooled dc arc furnace includes a plurality of in-furnace conductive contact pins 1 arranged side by side inside the furnace body and a plurality of out-furnace conductive contact pins 9 arranged outside the furnace body, wherein the out-furnace conductive contact pins 9 and the in-furnace conductive contact pins 1 are respectively installed at the upper side and the lower side of an in-furnace conductive bottom plate 8; the other end of the conductive contact pin 9 outside the furnace is connected with a conductive bottom plate 10 outside the furnace, the conductive bottom plate 10 outside the furnace is connected with a power supply, the conductive bottom plate 8 inside the furnace is arranged on the furnace body base 5, and an insulating plate 7 for coating the surface of the conductive bottom plate 8 inside the furnace is arranged on the edge of the conductive bottom plate 8 inside the furnace, so that the conductive bottom plate 8 inside the furnace is electrically insulated from the furnace body base 5; the one side that electrically conductive bottom plate 8 is provided with electrically conductive contact pin 1 in the stove still is provided with toper guard plate 3, and insulation board 7 is installed in the outside of toper guard plate 3, and the surface of insulation board 7 coats and is stamped the protection guide plate, and the protection guide plate includes protection guide plate 4 and lower protection guide plate 6, goes up protection guide plate 4 and all is L shape with lower protection guide plate 6, detains each other and presses together, protects the upper surface, lower surface and the side of insulation board 7. A pressing plate 20 is arranged on the conical protection plate 3, one end of the pressing plate 20 is welded on the conical protection plate 3, and the other end of the pressing plate 20 is pressed on the protection guide plate; the protection guide plate, the conical protection plate 3 and the pressing plate 20 form a partition between the insulation plate 7 and the ramming material 2 in the furnace, so that the insulation plate 7 is prevented from being corroded by liquid in the ramming material 2 in the furnace.
The tapered protection plate 3 comprises a straight plate and an inclined plate, one end of the straight plate is fixedly welded on the conductive bottom plate 8 in the furnace, and the other end of the straight plate is fixedly connected with the inclined plate; the inclined plate is installed above the pressure plate 20, and the projection length of the inclined plate in the direction of the pressure plate 20 is longer than the length of the pressure plate 20. The furnace body base 5 is provided with a diversion hole 19, and the diversion hole 19 is positioned between the protective diversion plate and the furnace wall. The flow direction of the harmful liquid in the ramming material 2 in the furnace is shown as the arrow in figure 1, the harmful liquid is guided to the upper protective guide plate 4 from the upper part through the inclined plate, then flows to the guide holes 19 on the base 5 of the furnace body from the upper protective guide plate 4, and flows out of the furnace through the guide holes 19.
Wherein, an air inlet hole is arranged at the center of the conductive bottom plate 10 outside the furnace, the wall of the air inlet hole is a conductive tube 11, the conductive tube 11 is fixedly arranged on the conductive bottom plate 10 outside the furnace, and the conductive tube 11 is connected with a power supply through a conductive flange plate 16.
A plurality of spiral air-cooled guide plates 13 are arranged on one side of the conductive bottom plate 8 in the furnace, which is far away from the conductive contact pin 1 in the furnace, an air-cooled guide groove communicated with the air inlet hole is formed between the adjacent air-cooled guide plates 13, and the conductive contact pin 9 outside the furnace is uniformly divided into the corresponding air-cooled guide grooves by the air-cooled guide plates 13. Both sides of the air-cooled guide plate 13 are provided with a plurality of spoilers 14, and the spoilers 14 are distributed in the air-cooled guide groove at intervals.
A flow guide air guiding pipe 18 communicated with the air inlet hole is arranged on the conductive pipe 11; the diversion induced draft tube 18 comprises a contraction tube and a mixing tube; the shrinkage tube is a conical tube, one end of the mixing tube is fixedly connected with the conductive tube 11, and the other end of the mixing tube is connected with the small end of the shrinkage tube; the big end of the contraction pipe is provided with an air-cooled jet pipe 17 for providing high-speed cold air; the inner diameter of the mixing pipe is smaller than the diameter of the air inlet hole; the air-cooled jet pipe 17, the diversion induced draft pipe 18 and the conductive pipe 11 form an ejector, and the air speed and the air quantity of cooling air are improved by utilizing the ejector principle.
The diversion air guiding pipe 18 is transversely installed on the side wall of the conductive pipe 11, and the other end of the conductive pipe 11 is sealed by the blind flange 12. The external air cooling equipment can be transversely arranged, the equipment height is reduced, and the problem that the whole equipment is inconvenient to use and maintain due to vertical arrangement is avoided.
Wherein, a plurality of radiating fins 15 are arranged on the conductive contact pin 9 outside the furnace for increasing the radiating area and improving the radiating effect.
Wherein, electrically conductive contact pin 1 is bending piece or flight structure in the stove, inlays in the stove ramming mass 2, bends or helical structure can effectively slow down the erosion rate of molten steel to the contact pin, still can effectively reduce the ramming mass because of the not compact bleed-out possibility that leads to of knoing.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A long-life transverse air-cooled direct current arc furnace bottom electrode comprises a plurality of furnace internal conductive contact pins arranged in a furnace body side by side and a plurality of furnace external conductive contact pins arranged outside the furnace body, wherein the furnace external conductive contact pins and the furnace internal conductive contact pins are respectively connected to two sides of a furnace internal conductive bottom plate; the other end of the conductive contact pin outside the furnace is connected with a conductive bottom plate outside the furnace, the conductive bottom plate outside the furnace is connected with a power supply, and the conductive contact pin outside the furnace is characterized in that: the conductive bottom plate in the furnace is arranged on the furnace body base, and an insulating plate for coating the surface of the conductive bottom plate in the furnace is arranged on the edge of the conductive bottom plate in the furnace, so that the conductive bottom plate in the furnace is electrically insulated from the furnace body base; a conical protection plate is further arranged on one side, provided with the conductive contact pin, of the conductive bottom plate in the furnace, the insulation plate is arranged on the outer side of the conical protection plate, a protection guide plate covers the outer surface of the insulation plate, a pressing plate is arranged on the conical protection plate, one end of the pressing plate is fixedly connected with the conical protection plate, and the other end of the pressing plate is pressed and attached to the protection guide plate; the protective guide plate, the conical protective plate, the pressing plate and the in-furnace conductive bottom plate form a partition between the insulating plate and the in-furnace ramming material, and the insulating plate is prevented from being corroded by penetrating liquid in the in-furnace ramming material.
2. The long life transverse air-cooled dc arc furnace bottom electrode of claim 1 wherein: the conical protection plate comprises a straight plate and an inclined plate, one end of the straight plate is fixedly connected with the conductive bottom plate in the furnace, and the other end of the straight plate is fixedly connected with the inclined plate; the inclined plate is arranged above the pressing plate, and the projection length of the inclined plate along the direction of the pressing plate is greater than the length of the pressing plate.
3. The long life transverse air-cooled dc arc furnace bottom electrode of claim 1, wherein: the furnace body base is provided with a flow guide hole, and the flow guide hole is positioned between the protective flow guide plate and the furnace wall.
4. The long life transverse air-cooled dc arc furnace bottom electrode of claim 1 wherein: an air inlet hole is formed in the conductive bottom plate outside the furnace, the wall of the air inlet hole is a conductive tube, and the conductive bottom plate outside the furnace is connected with a power supply through the conductive tube.
5. The long life transverse air-cooled dc arc furnace bottom electrode of claim 4 wherein: and a plurality of spiral air-cooled guide plates are arranged on one side of the conductive bottom plate in the furnace, which is far away from the conductive contact pins in the furnace, an air-cooled guide groove communicated with the air inlet hole is formed between every two adjacent air-cooled guide plates, and the conductive contact pins outside the furnace are uniformly divided into the corresponding air-cooled guide grooves by the air-cooled guide plates.
6. The long life transverse air-cooled dc arc furnace bottom electrode of claim 5, wherein: the air-cooled guide plate is characterized in that a plurality of spoilers are arranged on two sides of the air-cooled guide plate and are distributed in the air-cooled guide groove at intervals.
7. The long life transverse air-cooled dc arc furnace bottom electrode of claim 4 wherein: the conductive tube is provided with a diversion induced draft tube communicated with the air inlet hole; the diversion induced draft pipe comprises a contraction pipe and a mixing pipe; the telescopic pipe is conical, one end of the mixing pipe is connected with the conductive pipe, and the other end of the mixing pipe is connected with the small end of the telescopic pipe; the big end of the contraction pipe is provided with an air-cooled jet pipe used for providing high-speed cold air; the inner diameter of the mixing pipe is smaller than the diameter of the air inlet hole; the air-cooled jet pipe, the diversion induced draft pipe and the conductive pipe form an ejector, and the air speed and the air quantity of cooling air are improved.
8. The long life transverse air-cooled dc arc furnace bottom electrode of claim 7 wherein: the diversion induced draft tube is transversely arranged on the side wall of the conductive tube.
9. The long life transverse air-cooled dc arc furnace bottom electrode of claim 1 wherein: and a plurality of radiating fins are arranged on the conductive contact pin outside the furnace.
10. The long life transverse air-cooled dc arc furnace bottom electrode of claim 1 wherein: the conductive contact pin in the furnace is of a bent sheet or spiral sheet structure and is embedded in the ramming material in the furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210677451.3A CN115127353A (en) | 2022-06-15 | 2022-06-15 | Long-life transverse air-cooled direct-current arc furnace bottom electrode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210677451.3A CN115127353A (en) | 2022-06-15 | 2022-06-15 | Long-life transverse air-cooled direct-current arc furnace bottom electrode |
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| CN202210677451.3A Pending CN115127353A (en) | 2022-06-15 | 2022-06-15 | Long-life transverse air-cooled direct-current arc furnace bottom electrode |
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| CN2613123Y (en) * | 2003-04-03 | 2004-04-21 | 宝山钢铁股份有限公司 | DC arc hearth electrode |
| CN203258980U (en) * | 2013-06-07 | 2013-10-30 | 乐山沙湾天华机械制造有限责任公司 | Novel electric arc furnace |
| CN204571433U (en) * | 2015-03-12 | 2015-08-19 | 攀枝花市德铭再生资源开发有限公司 | Fluid erosion prevention sulfuric acid tank |
| CN105124718A (en) * | 2015-08-10 | 2015-12-09 | 盐城康泽源食品有限公司 | Instant noodle cooling device |
| CN207716449U (en) * | 2017-12-20 | 2018-08-10 | 上海辰鸣电力工程有限公司 | A kind of anticorrosion structure of chimney deflector |
| CN210584418U (en) * | 2019-06-06 | 2020-05-22 | 中石化宁波工程有限公司 | Flow guide structure is collected to desulfurizing tower acidizing fluid |
| CN110608617A (en) * | 2019-10-22 | 2019-12-24 | 中冶赛迪工程技术股份有限公司 | Bottom electrode of DC arc furnace |
| CN111174203A (en) * | 2019-12-25 | 2020-05-19 | 沈阳圣工燚科技有限公司 | Low-nitrogen combustor for biogas |
| CN111129651A (en) * | 2020-01-07 | 2020-05-08 | 盐城国投中科新能源科技有限公司 | Battery box with high-efficient cooling structure |
| CN212645524U (en) * | 2020-05-07 | 2021-03-02 | 亿木信智(北京)科技有限公司 | Active heat mixed flow infrared hidden structure |
| CN112902674A (en) * | 2021-01-26 | 2021-06-04 | 中冶赛迪工程技术股份有限公司 | Air-cooled contact pin type bottom electrode |
| TWI762188B (en) * | 2021-02-08 | 2022-04-21 | 台灣積體電路製造股份有限公司 | Method and apparatus of manufacturing semiconductor devices |
| CN215484148U (en) * | 2021-06-11 | 2022-01-11 | 北京世纪永峰防水材料有限公司 | Drainage protection plate |
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