CN108931138B - Electric arc furnace cover preparation system - Google Patents
Electric arc furnace cover preparation system Download PDFInfo
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- CN108931138B CN108931138B CN201811013441.XA CN201811013441A CN108931138B CN 108931138 B CN108931138 B CN 108931138B CN 201811013441 A CN201811013441 A CN 201811013441A CN 108931138 B CN108931138 B CN 108931138B
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- arc furnace
- stirring
- electric arc
- furnace cover
- water
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- 238000010891 electric arc Methods 0.000 title claims abstract description 65
- 238000002360 preparation method Methods 0.000 title claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 110
- 238000003756 stirring Methods 0.000 claims abstract description 82
- 238000002347 injection Methods 0.000 claims abstract description 24
- 239000007924 injection Substances 0.000 claims abstract description 24
- 239000000203 mixture Substances 0.000 claims abstract description 23
- 238000001746 injection moulding Methods 0.000 claims abstract description 19
- 238000001704 evaporation Methods 0.000 claims abstract description 7
- 230000008020 evaporation Effects 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 23
- 239000010959 steel Substances 0.000 claims description 23
- 238000001514 detection method Methods 0.000 claims description 11
- 239000000725 suspension Substances 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 9
- 238000004321 preservation Methods 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/18—Door frames; Doors, lids, removable covers
- F27D1/1808—Removable covers
- F27D1/1816—Removable covers specially adapted for arc furnaces
-
- 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
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The application discloses a preparation system of an electric arc furnace cover, which comprises a first stirring device, a second stirring device and a third stirring device, wherein the first stirring device is used for pre-stirring and mixing various components of the electric arc furnace cover; the second stirring device is used for carrying out secondary stirring and mixing on various components of the furnace cover of the electric arc furnace prepared by pre-stirring and mixing and moisture according to the proportion; the automatic water supply system is used for supplying water to the second stirring device according to the preparation proportion of the furnace cover of the electric arc furnace; the mobile platform is used for bearing the second stirring device and the automatic water supply system and conveying the component mixture subjected to secondary stirring and mixing into the injection mold; the injection mold is used for injection molding of the component mixture subjected to secondary stirring and mixing; and the baking system is used for baking the furnace cover of the injection molding electric arc furnace and accelerating the evaporation of water.
Description
Technical Field
The application belongs to the technical field of electric arc furnace covers, and particularly relates to a preparation system of an electric arc furnace cover.
Background
With the rapid development of the steel industry in China, a new technology of strengthening smelting is continuously adopted, an electric furnace in a pot is continuously developed to be large-sized and ultra-high power, but the problems of increasingly severe service conditions of refractory materials, annual reduction of service life of furnace covers and the like are brought along with the rapid development of the steel industry in China. The furnace cover of the electric arc furnace is an extremely important part in the production process of the electric furnace, the service life of the electric furnace is long, the operation rate and the labor intensity of the electric furnace are obviously influenced, and certain influence is brought to the quality and the production safety of molten steel.
The existing arc furnace cover preparation system has long period time and low efficiency, and can not meet the requirements of the rate and quality of industrial production.
Disclosure of Invention
The application aims to overcome the defects in the prior art and provide a furnace cover preparation system of an electric arc furnace, so as to solve the problems of long preparation cycle time and low preparation quality of the existing furnace cover of the electric arc furnace.
In order to achieve the above purpose, the application adopts the following technical scheme:
a furnace lid preparation system for an electric arc furnace, comprising:
the first stirring device is used for pre-stirring and mixing various components of the furnace cover of the electric arc furnace;
the second stirring device is used for carrying out secondary stirring and mixing on various components of the furnace cover of the electric arc furnace prepared by pre-stirring and mixing and moisture according to the proportion;
the automatic water supply system is used for supplying water to the second stirring device according to the preparation proportion of the furnace cover of the electric arc furnace;
the mobile platform is used for bearing the second stirring device and the automatic water supply system and conveying the component mixture subjected to secondary stirring and mixing into the injection mold;
the injection mold is used for injection molding of the component mixture subjected to secondary stirring and mixing;
and the baking system is used for baking the furnace cover of the injection molding electric arc furnace and accelerating the evaporation of water.
Preferably, the second stirring device and the automatic water supply system are both arranged on the mobile platform; the water outlet pipeline of the automatic water supply system is positioned above the second stirring device; the bottom of the stirring device is opened and communicated with the conveying pipeline;
the mobile platform is arranged on the two platform rails through four rollers at the bottom of the mobile platform; a plurality of injection molds for preparing furnace covers of the electric arc furnace are arranged between the two platform rails; a double-arm crane is arranged above the mobile platform; a suspension arm is arranged on the double-beam track of the double-arm crane, and a suspension rope connected with the hook is arranged on the suspension arm.
Preferably, the automatic water replenishment system comprises a water tank; a first electromagnetic valve and a second electromagnetic valve are respectively arranged on the water inlet pipeline and the water outlet pipeline of the water tank; a control panel is embedded at the top of the water tank, and a controller and a water level detection alarm circuit electrically connected with the controller are integrated in the control panel; the water level detection alarm circuit comprises a four-way analog switch integrated circuit CD4066 chip; the 13 pins of the CD4066 chip extend to the water level of one-fourth depth of the water tank, the 5 pins extend to the water level of one-half depth, the 6 pins extend to the water level of three-fourths depth, and the 12 pins are positioned at the top of the water tank.
Preferably, the first electromagnetic valve and the second electromagnetic valve are both HOPE97 pulse electromagnetic valves and are connected with a controller through signals; the controller is an STM32 singlechip; the STM32 singlechip input serial port end is connected with the water level detection alarm circuit through a lead.
Preferably, the baking system comprises a plurality of baking chambers arranged adjacently; each baking chamber is separated from the cover body, and the wall and the cover body of each baking chamber comprise a heat insulation layer and a steel frame; steel frames are embedded on the six side surfaces of the heat preservation layer; the steel frame is distributed on the wall and the cover body of the baking chamber in a crossing way, the longitudinal section of the steel frame positioned on the inner side of the wall of the baking chamber is L-shaped, and an infrared heating lamp tube is fixed on the concave side surface of the L-shaped steel frame.
Preferably, four arc hooks for matching with the hooks are welded on the steel frame on the upper surface of the cover body.
Preferably, a plurality of hanging fans are uniformly distributed on the upper part of the wall of the baking chamber.
Preferably, the heat-insulating layer is a heat-insulating sponge.
The arc furnace cover preparation system provided by the application has the following beneficial effects:
according to the application, the solid raw materials for preparing the electric arc furnace cover are mixed and stirred for the first time according to the proportion, and the mixture after the first stirring is fully stirred with water to complete the second stirring, so that the raw materials can be fully and uniformly mixed by stirring for two times, the quality of the electric arc furnace cover formed by later injection molding is ensured, and the problem of low production quality of the existing electric arc furnace cover is effectively solved.
Besides, the raw materials after secondary mixing are directly conveyed into an injection mold of the electric arc furnace cover through a moving platform, after injection molding is finished, the electric arc furnace cover after injection molding is conveyed into a baking chamber through a double-arm crane to be uniformly baked, evaporation of water in the electric arc furnace cover is accelerated, and the forming speed of the electric arc furnace cover is accelerated.
Compared with the traditional preparation system, the application has obviously enhanced automation degree and effectively solves the problems of long preparation cycle time and low preparation quality of the furnace cover of the existing electric arc furnace.
Drawings
FIG. 1 is a system block diagram of an arc furnace lid preparation system.
FIG. 2 is a block diagram of a furnace lid preparation system for an electric arc furnace.
FIG. 3 is a block diagram of a furnace lid preparation system bake chamber of an electric arc furnace.
FIG. 4 is a diagram of the infrared heating tube position of the furnace cover preparation system of the electric arc furnace.
Fig. 5 is a diagram showing a water tank structure of a furnace cover preparation system of an electric arc furnace.
FIG. 6 shows a water level detection alarm circuit in a water tank of an electric arc furnace cover preparation system.
1, a mobile platform; 2. a second stirring device; 3. a water tank; 4. a delivery conduit; 5. an injection mold; 6. a platform rail; 7. a roller; 8. a double beam track; 9. a suspension arm; 10. a hanging rope; 11. a hook; 12. a baking chamber; 13. hanging fan; 14. an infrared heating lamp tube; 15. a steel frame; 16. a cover body; 17. an arc-shaped hook; 18. a heat preservation layer; 19. baking room walls; 31. a control panel; 32. a first LED lamp; 33. a second LED lamp; 34. a third LED lamp; a fourth LED lamp 35; 36. a first electromagnetic valve; 37. a water inlet pipe; 38. a second electromagnetic valve; 39. and a water outlet pipeline.
Detailed Description
The following description of the embodiments of the present application is provided to facilitate understanding of the present application by those skilled in the art, but it should be understood that the present application is not limited to the scope of the embodiments, and all the applications which make use of the inventive concept are protected by the spirit and scope of the present application as defined and defined in the appended claims to those skilled in the art.
Referring to fig. 1, according to an embodiment of the present application, an arc furnace lid preparation system of the present embodiment includes:
the first stirring device is used for pre-stirring and mixing various components of the furnace cover of the electric arc furnace;
the second stirring device 2 is used for carrying out secondary stirring and mixing on various components of the furnace cover of the electric arc furnace prepared by pre-stirring and mixing and moisture according to the proportion;
the automatic water supply system is used for supplying water to the second stirring device 2 according to the preparation proportion of the furnace cover of the electric arc furnace;
the mobile platform 1 is used for bearing a second stirring device 2 and an automatic water supply system and conveying the component mixture subjected to secondary stirring and mixing to the injection mold 5;
an injection mold 5 for injection molding the component mixture after the secondary stirring and mixing is completed;
and the baking system is used for baking the furnace cover of the injection molding electric arc furnace and accelerating the evaporation of water.
The following describes the various systems and devices in detail:
the first stirring device is an HX-L2000 powder stirrer, and workshop staff can stir the solid powder for the first time according to the proportion of each component according to the components for preparing the furnace cover of the electric arc furnace.
The second stirring device 2 and the automatic water supply system are both arranged on the mobile platform 1, a water outlet pipeline 39 of the automatic water supply system is positioned above the second stirring device 2, and the bottom of the stirring device is opened and communicated with the conveying pipeline 4.
The second stirring device 2 is a JW-350 stirrer and is used for stirring the mixture after the first stirring and a certain amount of water for the second time. The furnace cover of the electric arc furnace is prepared by stirring various combinations twice, compared with the sequential stirring in the traditional preparation process, the two times of stirring can fully mix various components, can uniformly stir the components, and has higher improvement on the quality of finished products. The bottom of the second stirring device 2 is opened and communicated with the conveying pipeline 4, and the mixture after secondary stirring is conveyed outwards.
Referring to fig. 5, the automatic water replenishing system includes a water tank 3; the water inlet pipeline 37 and the water outlet pipeline 39 of the water tank 3 are respectively provided with a first electromagnetic valve 36 and a second electromagnetic valve 38; a control panel 31 is embedded at the top of the water tank 3, and a controller and a water level detection alarm circuit electrically connected with the controller are integrated in the control panel 31; the water level detection alarm circuit comprises a four-way analog switch integrated circuit CD4066 chip; the 13 pins of the CD4066 chip extend to the water level of one-fourth depth of the water tank 3, the 5 pins extend to the water level of one-half depth, the 6 pins extend to the water level of three-fourths depth, and the 12 pins are positioned at the top of the water tank 3.
The first electromagnetic valve 36 and the second electromagnetic valve 38 are HOPE97 pulse electromagnetic valves and are connected with a controller through signals; the controller is an STM32 singlechip; the STM32 singlechip input serial port end is connected with the water level detection alarm circuit through a lead.
Referring to fig. 6, the water tank 3 operates on the principle that: when the water tank 3 is free of water, the control ends of the four switches are low level due to the effect of the 180K resistor, the switches are disconnected, and the LEDs do not emit light. As the water level increases, the pin 13 of the IC is at a high level due to the conductive property of the water, S1 is turned on, and LED1 is turned on; when the water level increases gradually, the LEDs sequentially emit light to indicate the water level. When the water is full, the LED4 emits light to display the water is full. At the same time T1 is conducted, B gives out an alarm sound to prompt that the water is full. When the alarm sound is not needed, the switch K is turned off.
That is, when the water level in the water tank 3 is one fourth, S1 is turned on and the fourth LED lamp 35 emits light;
when the water level in the water tank 3 is half, S2 is conducted, and the third LED lamp 34 emits light;
when the water level in the water tank 3 is three-quarters, S3 is turned on, and the second LED lamp 33 emits light;
when the water in the water tank 3 is full, S4 is turned on, the first LED lamp 32 emits light, and at the same time, B emits an alarm sound.
Meanwhile, the water level detection alarm circuit transmits water level information to the controller, and the controller can control water inlet and outlet of the water inlet pipeline 37 and the water outlet pipeline 39. When the water level in the water tank 3 is lower than half, namely the fourth LED lamp 35 emits light, and the third LED lamp 34 does not emit light, the first electromagnetic valve 36 is controlled to open for water inflow until the second LED lamp 33 and the first LED lamp 32 emit light, and the first electromagnetic valve 36 is controlled to close.
Referring to fig. 2, the moving platform 1 is provided on two platform rails 6 by four rollers 7 at the bottom thereof; a plurality of injection molds 5 for preparing furnace covers of the electric arc furnace are arranged between the two platform rails 6; a double-arm crane is arranged above the mobile platform 1; a suspension arm 9 is arranged on a double-beam track 8 of the double-arm crane, and a suspension rope 10 connected with a hook 11 is arranged on the suspension arm 9.
The injection mold 5 can be a general electric arc furnace cover injection mold 5 for injection molding. A plurality of injection molds 5 are arranged between the two platform rails 6, the moving platform 1 moves to the upper part of the injection molds 5, and the component mixture is conveyed into the injection molds 5 through the conveying pipeline 4, so that the injection molding of the furnace cover of the electric arc furnace is completed.
Referring to fig. 3, the baking system includes a plurality of baking chambers 12 disposed adjacent one another; each baking chamber 12 is arranged separately from the cover 16, and each baking chamber wall 19 and the cover 16 comprise an insulating layer 18 and a steel frame 15; steel frames 15 are embedded on six side surfaces of the heat preservation layer 18; the steel frames 15 are distributed on the wall 19 and the cover 16 of the baking chamber in a crossing way, the longitudinal section of the steel frames 15 positioned on the inner side of the wall 19 of the baking chamber is L-shaped, and an infrared heating lamp tube 14 is fixed on the concave side surface of the L-shaped steel frames.
Referring to fig. 4, four arc hooks 17 for engaging with the hooks 11 are welded to the steel frame 15 on the upper surface of the cover 16, and the cover 16 is lifted and moved to the top of the baking chamber 12 by engaging the hooks 11 with the four arc hooks 17, so that the baking chamber 12 forms a closed space to prevent the heat from being dissipated too quickly.
The upper part of the wall 19 of the baking chamber is uniformly provided with a plurality of hanging fans 13, so that the air flow in the baking chamber 12 can be accelerated when the furnace cover of the electric arc furnace is baked, and the influence on the quality of finished products due to overhigh local temperature is avoided.
The heat preservation layer 18 between the steel frames 15 is made of heat preservation sponge, and mainly plays a role in heat insulation and heat wrapping, so that heat loss is reduced.
The following describes in detail the working principle of the furnace cover preparation system of the electric arc furnace according to the application:
putting various solids or solid powder of an arc furnace cover into a first stirring device according to a proportion, and carrying out first mixing and stirring to obtain a first-stirring mixture;
conveying the mixture stirred for the first time into a second stirring device 2, adding a certain amount of water through a water tank 3, stirring for the second time, and obtaining a mixture stirred for the second time;
the moving platform 1 moves to the upper part of the injection mold 5, the second stirring mixture is transported to the injection mold 5 through the conveying pipeline 4, and the furnace cover of the electric arc furnace is obtained through vibration molding;
starting a double-beam crane, and conveying the vibratory arc furnace cover into a baking chamber 12 through a hook 11 and a lifting rope 10;
the double beam crane operates again, the cover 16 is conveyed to the top of the baking chamber 12 through the rope and the hook 11, the infrared heating lamp tube 14 and the hanging fan 13 are started, and the furnace cover of the electric arc furnace is uniformly dried.
According to the application, the solid raw materials for preparing the electric arc furnace cover are mixed and stirred for the first time according to the proportion, and the mixture after the first stirring is fully stirred with water to complete the second stirring, so that the raw materials can be fully and uniformly mixed by stirring for two times, the quality of the electric arc furnace cover formed by later injection molding is ensured, and the problem of low production quality of the existing electric arc furnace cover is effectively solved.
Besides, the raw materials after secondary mixing are directly conveyed into an injection mold 5 of the electric arc furnace cover through a movable platform 1, after injection molding is finished, the electric arc furnace cover after injection molding is conveyed into a baking chamber 12 through a double-arm crane to be uniformly baked, evaporation of water in the electric arc furnace cover is accelerated, and the forming speed of the electric arc furnace cover is accelerated.
Compared with the traditional preparation system, the application has obviously enhanced automation degree and effectively solves the problems of long preparation cycle time and low preparation quality of the furnace cover of the existing electric arc furnace.
Although specific embodiments of the application have been described in detail with reference to the accompanying drawings, it should not be construed as limiting the scope of protection of the present patent. Various modifications and variations which may be made by those skilled in the art without the creative effort are within the scope of the patent described in the claims.
Claims (1)
1. A furnace lid preparation system for an electric arc furnace, comprising:
the first stirring device is used for pre-stirring and mixing various components of the furnace cover of the electric arc furnace;
the second stirring device is used for carrying out secondary stirring and mixing on various components of the furnace cover of the electric arc furnace prepared by pre-stirring and mixing and moisture according to the proportion;
the automatic water supply system is used for supplying water to the second stirring device according to the preparation proportion of the furnace cover of the electric arc furnace;
the mobile platform is used for bearing the second stirring device and the automatic water supply system and conveying the component mixture subjected to secondary stirring and mixing into the injection mold;
the injection mold is used for injection molding of the component mixture subjected to secondary stirring and mixing;
the baking system is used for baking the furnace cover of the injection molding electric arc furnace and accelerating the evaporation of water;
the second stirring device and the automatic water supply system are both arranged on the mobile platform; the water outlet pipeline of the automatic water supply system is positioned above the second stirring device; the bottom of the second stirring device is opened and communicated with the conveying pipeline;
the mobile platform is arranged on the two platform rails through four rollers at the bottom of the mobile platform; a plurality of injection molds for preparing furnace covers of the electric arc furnace are arranged between the two platform rails; a double-arm crane is arranged above the mobile platform; a suspension arm is arranged on the double-beam track of the double-arm crane, and a suspension rope connected with the hook is arranged on the suspension arm;
the automatic water supply system comprises a water tank; a first electromagnetic valve and a second electromagnetic valve are respectively arranged on the water inlet pipeline and the water outlet pipeline of the water tank; the top of the water tank is embedded with a control panel, and a controller and a water level detection alarm circuit electrically connected with the controller are integrated in the control panel; the water level detection alarm circuit comprises a four-way analog switch integrated circuit CD4066 chip; the 13 pins of the CD4066 chip extend to the water level of one-fourth depth of the water tank, the 5 pins extend to the water level of one-half depth, the 6 pins extend to the water level of three-fourths depth, and the 12 pins are positioned at the top of the water tank;
the first electromagnetic valve and the second electromagnetic valve are HOPE97 pulse electromagnetic valves and are connected with a controller through signals; the controller is an STM32 singlechip; the input serial port end of the STM32 singlechip is connected with the water level detection alarm circuit through a lead;
the baking system comprises a plurality of baking chambers which are adjacently arranged; each baking chamber is separated from the cover body, and each baking chamber wall and the cover body comprise a heat insulation layer and a steel frame; steel frames are embedded on six side surfaces of the heat preservation layer; the steel frames are distributed on the wall and the cover body of the baking chamber in a crossing mode, the longitudinal section of the steel frames positioned on the inner side of the wall of the baking chamber is L-shaped, and an infrared heating lamp tube is fixed on the concave side surface of the L-shaped steel frames;
four arc hooks for matching with the hooks are welded on the steel frame on the upper surface of the cover body;
a plurality of hanging fans are uniformly distributed on the upper part of the wall of the baking chamber;
the heat preservation layer is a heat preservation sponge;
putting various solids or solid powder of an arc furnace cover into a first stirring device according to a proportion, and carrying out first mixing and stirring to obtain a first-stirring mixture;
conveying the mixture stirred for the first time into a second stirring device, adding a certain amount of water into the second stirring device through a water tank, stirring for the second time, and obtaining a mixture stirred for the second time;
the moving platform moves to the upper part of the injection mold, the second stirring mixture is transported to the injection mold through a conveying pipeline, and the furnace cover of the electric arc furnace is obtained through vibration molding;
starting a double-beam crane, and conveying the vibratory formed furnace cover of the electric arc furnace into a baking chamber through a hook and a lifting rope;
the double-beam crane operates again, the cover body is conveyed to the top of the baking chamber through the rope and the hook, the infrared heating lamp tube and the hanging fan are started, and the furnace cover of the electric arc furnace is uniformly dried;
the solid raw materials for preparing the arc furnace cover are mixed and stirred for the first time according to the proportion, and the mixture after the first stirring is fully stirred with water to complete the second stirring, so that the raw materials can be fully and uniformly mixed by the two times of stirring, the quality of the arc furnace cover formed by later injection molding is ensured, and the problem of low production quality of the existing arc furnace cover is effectively solved;
besides, the raw materials after secondary mixing are directly conveyed into an injection mold of the electric arc furnace cover through a moving platform, after injection molding is finished, the electric arc furnace cover after injection molding is conveyed into a baking chamber through a double-arm crane to be uniformly baked, evaporation of water in the electric arc furnace cover is accelerated, and the forming speed of the electric arc furnace cover is accelerated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811013441.XA CN108931138B (en) | 2018-08-31 | 2018-08-31 | Electric arc furnace cover preparation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811013441.XA CN108931138B (en) | 2018-08-31 | 2018-08-31 | Electric arc furnace cover preparation system |
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|---|---|
| CN108931138A CN108931138A (en) | 2018-12-04 |
| CN108931138B true CN108931138B (en) | 2023-12-01 |
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| CN201811013441.XA Active CN108931138B (en) | 2018-08-31 | 2018-08-31 | Electric arc furnace cover preparation system |
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| CN108414047A (en) * | 2018-05-21 | 2018-08-17 | 无锡集安自动化科技有限公司 | A kind of monitoring water level equipment for water tank |
| CN208720822U (en) * | 2018-08-31 | 2019-04-09 | 四川合一电气科技有限公司 | A kind of arc furnace cover preparation system |
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| Publication number | Publication date |
|---|---|
| CN108931138A (en) | 2018-12-04 |
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