CN115595400B - Three-electrode AC/DC electric smelting furnace - Google Patents
Three-electrode AC/DC electric smelting furnace Download PDFInfo
- Publication number
- CN115595400B CN115595400B CN202211297735.6A CN202211297735A CN115595400B CN 115595400 B CN115595400 B CN 115595400B CN 202211297735 A CN202211297735 A CN 202211297735A CN 115595400 B CN115595400 B CN 115595400B
- Authority
- CN
- China
- Prior art keywords
- electrode
- base
- furnace
- driven gear
- trigger
- 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
- 238000003723 Smelting Methods 0.000 title claims abstract description 44
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 5
- 239000010963 304 stainless steel Substances 0.000 claims description 4
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 238000005461 lubrication Methods 0.000 claims 1
- 238000003466 welding Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 5
- 239000010959 steel Substances 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 230000007246 mechanism Effects 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 9
- 229910002804 graphite Inorganic materials 0.000 description 6
- 239000010439 graphite Substances 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/5211—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/5229—Manufacture of steel in electric furnaces in a direct current [DC] electric arc furnace
-
- 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)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The invention relates to the field of electric smelting furnaces, in particular to a three-electrode alternating current-direct current smelting furnace, which comprises the following components: the base is arranged on the furnace cover above the smelting furnace, the driven gear is arranged on the base, the clamping device further comprises a cam arranged on the driven gear, and the locking device comprises a ratchet wheel arranged on the driven gear and a pawl arranged on the base. The clamping device also needs a corresponding triggering device, the triggering device comprises a triggering rod arranged below the clamp holder, one end of the triggering rod is arranged between the limiting blocks, the other end of the triggering rod is connected with a tension spring, the other end of the tension spring is connected to the clamp holder, and a triggering switch is arranged above the triggering rod. Compared with the existing three-electrode AC/DC smelting furnace, the invention has the advantages that the electrode breaking clamping device is added on the premise of realizing the function of steel smelting equally, and after the electrode breaking is detected, the broken electrode is clamped, so that the electrode is prevented from directly striking the furnace bottom, and the service life of the smelting furnace is prolonged.
Description
Technical Field
The invention relates to the field of smelting furnaces, in particular to a three-electrode alternating-current and direct-current smelting furnace.
Background
In recent years, with the development of electric furnace smelting technology, the electric furnace smelting technology gradually moves to large-scale and high-power alternating current conversion and direct current fluidization. The quality of the graphite electrode is further improved, and along with the increase of the production scale of electric furnace smelting, the processing technology of the graphite electrode has become an important technology for influencing the electric furnace smelting. In steel-making production, reasonable use of graphite electrodes is a key factor in ensuring production safety of an electric furnace and reducing production cost. In electric arc furnace production, breakage of the graphite electrode is often caused by the charge, equipment, handling, the graphite electrode itself, etc., or by the interaction of the various factors mentioned above.
In the smelting process of the electric arc furnace, particularly in the earlier stage of smelting, three heat wells are formed below the three electrodes, and because heat begins to be generated from the lower parts of the electrodes during smelting, scrap steel in a hearth is generally formed into a bridge-like shape. During smelting, the scrap steel can suddenly drop to the middle part of the hot well, so that the electrode is subjected to great transverse impact force, and the electrode is broken at the accessory or joint of the clamping point.
When the electrode is broken, the broken electrode can fall into the furnace bottom, and the electrode directly impacts the furnace bottom, so that the furnace bottom is easy to crack, and the service life of the electric smelting furnace is influenced. The temperature in the electric smelting furnace is generally high, and the electric smelting furnace is provided with the furnace burden which is not melted, so that the electrode which is broken into the furnace is not easy to salvage. The graphite electrode which is broken into the smelting furnace also affects the quality of the furnace charge, and the furnace charge is easy to be impure. Meanwhile, the salvaging work of the broken electrode is complicated, so that the production rate is greatly reduced.
At present, operators reduce the probability of electrode breakage mainly through measures such as reasonably controlling the negative pressure and the current in the furnace, standardizing the operation of the clamp holder, guaranteeing the quality and the installation quality of the electrodes, reinforcing staff training, coating the electrodes and the like. But does not address the effects of the electrode after breakage of the holder.
Therefore, the electrode breaking clamp is provided, and the problem that an electric furnace electrode directly falls into the furnace bottom when breaking occurs at the clamp is solved.
Disclosure of Invention
The invention aims to provide an electrode breakage clamping device of a three-electrode AC/DC electric smelting furnace, which is characterized in that an electrode breakage detection mechanism is arranged, when an electrode breaks at a clamp holder, the clamping mechanism arranged on a furnace cover is triggered to clamp the electrode, the broken electrode is prevented from falling to the furnace bottom, the service life of the electric furnace is further prolonged, the quality of furnace burden is not influenced, and the broken electrode is convenient to recycle.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a three-electrode ac/dc smelting furnace comprising:
The furnace body is used for containing raw materials, a furnace cover is arranged at the top of the furnace body, three round electrode holes are formed in the furnace cover, electrodes for heating are arranged on each electrode hole, and a clamp holder is arranged at the upper end of each electrode;
still be equipped with clamping device on still including the stove lid, clamping device can detect electrode breakage and can press from both sides the electrode that breaks down.
Preferably, the clamping device comprises a cylindrical furnace cover arranged above the smelting furnace, three cylindrical electrode holes with the same size are arranged on the furnace cover, the three electrode holes are distributed in an equilateral triangle shape, a plurality of positioning pins are fixedly arranged around the electrode holes, a base is arranged on the electrode holes, a driven gear is arranged on the base through clearance fit, the driven gear can rotate on the base, a plurality of cams are arranged on the driven gear and the base, the cams are uniformly distributed on the driven gear in circumference, one end of each eccentric wheel in each cam is connected onto the base through a cylindrical pin, and the other end of each eccentric wheel is connected onto the driven gear through the cylindrical pin. When the electrode breaks, the driven gear drives the cam to rotate, and one end of the eccentric wheel is connected to the base, so that the broken electrode is clamped by the eccentric wheel part when the cam rotates. The electrode is prevented from directly falling into the furnace to damage the furnace bottom, so that cracks are generated on the furnace bottom, and the service life of the smelting furnace is further prolonged. When the clamping device works normally, the cam is not in contact with the electrode, so that current on the electrode is prevented from being conducted to the furnace cover, and the working efficiency of the electrode is influenced. In order to improve the smelting speed and the quality of the furnace burden and reduce the consumption of electric energy and electrodes, the electrodes can adjust the depth of the electrodes inserted into the furnace according to the smelting time and the quantity of the furnace burden, and when the cam is contacted with the electrodes, the descending depth of the electrodes cannot be adjusted. The electrode is a consumable, the longer the working time of the electrode, the shorter the working length of the electrode, and the holder can adjust the working length of the electrode according to the consumption degree of the electrode. When the temperature in the furnace is 1500 ℃, the temperature of the furnace top is 140 ℃, and the clamping mechanism can normally operate on the furnace top.
Furthermore, the cam is made of 304 stainless steel, the 304 stainless steel is widely used steel, and has good corrosion resistance, heat resistance and mechanical properties, the melting point is 1454 ℃, and when the electrode falls, the electrode can be stably clamped.
Preferably, the clamping device further comprises a ratchet wheel arranged on the driven gear, the base is provided with a pawl, when the electrode is broken, the motor is started, the driving gear drives the driven gear to rotate, the ratchet wheel on the driven gear also rotates along with the driven gear, when the electrode is completely clamped by the cam, the pawl on the base clamps the ratchet wheel on the driven gear, and at the moment, the electrode can be clamped without power supplied by the motor.
Preferably, the base is provided with a plurality of hanging rings, and the plurality of hanging rings are uniformly arranged on the circumference of the base so that the crane can more conveniently lift the clamped electrode. Because the driving gear and the driven gear are straight teeth, after the broken electrode is locked, the clamping mechanism and the electrode on the base are directly lifted by the crane, and the broken electrode is placed in the recovery area. The lifting ring greatly saves the replacement time of the electrode and improves the production efficiency of the electric furnace.
Preferably, the base is provided with a plurality of positioning holes, the positioning holes correspond to a plurality of positioning pins around the electrode holes on the furnace cover respectively, and the heights of the positioning pins are just the same as the depths of the positioning holes, so that clearance fit is adopted. The base can be quickly and accurately arranged on the furnace cover through the positioning holes, the driven gear can not drive the base to rotate together when rotating, and meanwhile, the electrode directly locked by the crane is conveniently and directly lifted.
Preferably, a cylindrical electrode is arranged in the electrode hole, one end of the electrode is inserted into the smelting furnace, the other end of the electrode is clamped by a clamp holder, a first trigger rod is arranged below the clamp holder, one end of the first trigger rod is connected between the first two limiting blocks through a first pin, the other end of the first trigger rod is connected with a first tension spring, the other end of the first tension spring is vertically connected to the clamp holder, and a first trigger switch is arranged right above the trigger rod. When the electric furnace normally operates, one end of the trigger rod connected with the first tension spring is propped against the electrode, and the first trigger switch is disconnected. When the electrode breaks, one end of the trigger rod connected with the first tension spring is propped against the electrode, the first trigger rod is impacted to the first trigger switch under the action of the tension force of the first tension spring, the first trigger switch is closed, and the motor is started.
Preferably, a second trigger rod is arranged above the base, one end of the second trigger rod is connected between the second limiting blocks through a second pin, the other end of the second trigger rod props against the electrode and is connected with a second tension spring, the other end of the second tension spring is vertically connected to the base, and a second trigger switch is arranged under the second trigger rod. When the electrode breaks down, the clamping mechanism cannot clamp the broken electrode in time due to circuit faults or other reasons, the electrode can directly fall into the furnace, at the moment, the trigger rod II arranged on the base is propped against the electrode, the trigger rod II can be subjected to self gravity and the tension of the tension spring II, under the action of the two forces, the trigger rod II can strike the trigger switch II, the trigger switch II is closed, at the moment, two intact electrodes are left to be powered off, and the rest two electrodes do not work, so that potential safety hazards are avoided. Meanwhile, when the electrode damages the furnace bottom, the furnace burden leaks, and the leakage accident is avoided.
Furthermore, the first trigger rod and the second trigger rod are made of silicon carbide ceramics, and the first trigger rod and the second trigger rod need to be in contact with the electrode for a long time, and the heat generated at the clamping position of the electrode is generally 1400 ℃ and is not more than 1550 ℃. The melting point of the silicon carbide ceramic is 1650 ℃, and the silicon carbide ceramic is non-conductive and does not transfer electric energy on a conductive electrode, so that the stability of the equipment is improved.
Furthermore, the closer the trigger switch I and the trigger switch II are to the limiting block, the more sensitive the trigger device is, and the quicker the response time is when the electrode breaks down, but because the electric furnace can vibrate in work, the false touch can easily occur. Meanwhile, the farther the trigger switch I and the trigger switch II are from the limiting block, the more stable the trigger device is, and when the electrode is broken, the response time is slower, but the vibration generated in the working process of the electric furnace is not easy to influence the trigger device. The user can select the trigger switch mounting position as appropriate.
Preferably, the driving device comprises two fixed blocks arranged on the furnace cover, a motor is arranged between the two fixed blocks, a driving gear is arranged below the motor, the driving gear is meshed with a driven gear, the motor is a servo motor, the PCL is used for controlling the rotating angle of the servo motor, the model number of the servo motor is LCMT-10L02-80M04025, the response speed of the servo motor is high, and the rotating speed of the servo motor is accelerated to 2500rpm from 0rpm and only 3ms is needed.
Preferably, for example: the number of teeth of the driving gear is 12, the number of teeth of the driven gear is 30, the transmission ratio between the driving gear and the driven gear is 2.5, and a free falling formula is utilizedAfter the response of the trigger switch is calculated, the electrode can be clamped by how far from the clamp holder after falling, and the transmission ratio between the driving gear and the driven gear is within 10, so that the electrode can be clamped before falling into the furnace completely.
Optionally, the driving device can be replaced by hydraulic driving, because the angle of the driven gear required to rotate when the electrode is clamped is about 17 degrees, the sector gear can be pushed by the hydraulic cylinder, the sector gear drives the driven gear to rotate, and the stroke of the push rod of the hydraulic cylinder can be directly set to just meet the maximum clamping stroke of the clamping device. However, hydraulic oil is sensitive to temperature, oil leakage is easy to occur in a high-temperature environment, and a user can consider the situation as appropriate.
Compared with the prior art, the invention has the beneficial effects that:
1. Compared with the existing three-electrode AC/DC smelting furnace, the three-electrode AC/DC smelting furnace provided by the invention has the advantages that the electrode breaking clamping device is added on the premise of realizing the function of steel smelting equally, and after the electrode breaking is detected, the broken electrode is clamped, so that the electrode is prevented from directly striking the furnace bottom to cause cracking of the furnace bottom, and the service life of the smelting furnace is prolonged.
2. According to the three-electrode AC/DC smelting furnace, the hanging ring is arranged on the clamping device, when the electrode is broken, after the electrode is clamped and locked, the driving gear and the driven gear are straight teeth, so that the crane can directly utilize the hanging ring arranged on the base to recycle the whole clamping mechanism and the broken electrode, the replacement of the broken electrode is quickened, the time is saved, and the production efficiency is improved.
3. According to the three-electrode AC/DC smelting furnace, the emergency power-off switch is arranged, when the electrode is broken and the clamping device cannot clamp the broken electrode, the electrode can directly fall into the furnace, and the two remaining intact electrodes can stop working immediately at the moment, so that potential safety hazards are avoided. Meanwhile, when the electrode damages the furnace bottom, the furnace burden leaks, and the leakage accident is avoided.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a top view of the present invention;
FIG. 4 is an enlarged view of portion A of FIG. 2 in accordance with the present invention;
FIG. 5 is a schematic view of a clamping device of the present invention;
FIG. 6 is a non-enlarged view of B in FIG. 1 in accordance with the present invention;
FIG. 7 is a cross-sectional view of the D-D of FIG. 3 in accordance with the present invention;
FIG. 8 is an enlarged view of section C of FIG. 7 in accordance with the present invention;
FIG. 9 is a cam part diagram of the present invention;
FIG. 10 is a schematic view of a third embodiment of the present invention;
In the figure: 1. a furnace body; 2. a furnace cover; 3. an electrode; 4. a holder; 5. a first limiting block; 6. a pin I; 7. triggering a first switch; 8. a first trigger rod; 9. a tension spring I; 10. a second limiting block; 11. a second pin; 12. a second trigger rod; 13. triggering a second switch; 14. a tension spring II; 15. a base; 16. a driven gear; 17. a cam; 18. a positioning pin; 19. positioning holes; 20. a fixed block; 21. a motor; 22. an electrode hole; 23. a pawl; 24. a ratchet wheel; 25. a drive gear; 26. and (5) hanging rings.
Detailed Description
Embodiment one:
Working state: when the electrode 3 breaks at the grip, the clamping device operates normally.
Referring to fig. 1 to 9, a base 15 is mounted on a furnace cover 2 through a locating pin 18, a clamping device is mounted on the base 15, the clamping device comprises a driven gear 16, the driven gear 16 is mounted right above the base 15 through a gap connection, a cam 17 is mounted above the base 15 and the driven gear 16, the cam 17 is made of 304 stainless steel, one end of an eccentric wheel of the cam 17 is connected to the base 15, and the other end of the eccentric wheel of the cam 17 is connected to the driven gear 16. The clamping device is also provided with a locking device which comprises an inner ratchet wheel 24 arranged on the driven gear 16, and a pawl 23 arranged on the base 15 and matched with the inner ratchet wheel 24. The driving device is driven by a motor 21, the motor 21 is arranged in the middle of the three electrode holes 22 through a fixed block 20, when the motor 21 works, the motor 21 drives a driving gear 25 to rotate, and then the driving gear 25 drives a driven gear 16. Two symmetrical hanging rings 26 are also arranged on the base 15. The electrode 3 break detection device is installed to the below of holder 4, including installing the trigger lever one 8 in the holder 4 below, the one end of trigger lever one 8 is connected together with stopper one 5 through pin one 6 connection, and the extension spring one 9 is being connected to the other end of trigger lever one 8 to support on electrode 3, be provided with trigger switch one 7 under the trigger lever one 8, when electrode 3 normally works, trigger lever one 8 can not touch with trigger switch one 7, the material of trigger lever one 8 selection is the carborundum pottery. The electrical control not specifically described in the present disclosure is implemented by PCL.
The specific working procedure is as follows:
before working: the trigger switch II 13 is pulled up manually, the electrode 3 is inserted into the furnace body 1 through the clamp 4, the clamping device and the electrode hole 22, when the electrode 3 descends to a proper position, the clamp 4 clamps the electrode 3, and the PCL is used for controlling the rotating angle of the servo motor 21. It is checked whether all trigger switches are in an opened state, whether the positioning holes 19 on the base 15 are inserted into the corresponding positioning pins 18, and whether the mounting of the cams 17 is correct, and the operation of the start electrode 3 is started after checking that there is no error.
When in operation, the device comprises: under the condition that the electrode 3 works stably, the clamping mechanism and the two triggering mechanisms on the base 15 do not interfere with the electrode 3, and the normal work of the electrode 3 is not affected. When the electrode 3 breaks, one end of the trigger rod I8 connected with the tension spring I9 is propped against the electrode 3, the trigger rod I8 is impacted to the trigger switch I7 under the action of the tension force of the tension spring I9, the trigger switch I7 is closed, the motor 21 is started, the motor 21 drives the driving gear 25 to rotate after being started, the driving gear 25 drives the driven gear 16, the cam 17 on the driven gear 16 also rotates along with the driving gear, because of the eccentric wheel structure of the head of the cam 17, the distance between the cam 17 and the electrode 3 is reduced after the cam 17 rotates, and the broken electrode 3 can be clamped by the cam 17. Because the servo motor 21 can be started up to 2500rpm, i.e. 42rps, in 3ms, because the number of teeth of the driving gear 25 is 12, the number of teeth of the driven gear 16 is 30, and the transmission ratio between the two gears is 2.5. The driven gear 16 and the base 15 are in a concentric relation, the angle between the cylindrical pin on the driven gear 16 and the cylindrical pin on the base 15 of the cam 17 is 17 degrees, namely, when the driven gear 16 rotates by 17 degrees, the cylindrical pin on the driven gear 16 of the cam 17 and the cylindrical pin on the base 15 are in the same straight line with the circle center, at the moment, the clamping mechanism reaches the maximum clamping stroke, the driven gear 16 rotates by 17 degrees, namely, 0.05 circle, the driving gear 25 needs to rotate by 0.125 circle to drive the driven gear 16 to rotate by 0.05 circle, and the time required for clamping the electrode 3 after the motor 21 is started is as follows: Plus the start-up time of the motor 21 is equal to the time required for clamping after triggering the switch: 0.003s+0.003s=0.006 s, according to the formula of free falling, it can be calculated how much distance the clamping device descends after the electrode 3 breaks down the trigger switch, and the electrode 3 can be clamped: /(I) Because the driven gear 16 is also provided with the ratchet wheel 24, when the cam 17 clamps the electrode 3, the pawl 23 on the base 15 clamps the ratchet wheel 24, and at the moment, the device is in a stable state, the motor 21 is not required to provide power, and the motor 21 is powered off. Thus, the broken electrode 3 can be prevented from directly falling to the furnace bottom, and the furnace bottom is prevented from cracking.
After working: when the electrode 3 is locked by the locking mechanism, the crane is connected to the hanging ring 26 on the base 15, and the broken electrode 3 is placed in the recovery area by directly lifting the clamping mechanism on the base 15 and the electrode 3 by the crane because the driving gear 25 and the driven gear 16 are straight teeth and the base 15 is in a stepped circular ring shape. Greatly saves the replacement time of the electrode 3 and improves the production efficiency of the electric smelting furnace.
Embodiment two:
Working state: when the electrode 3 breaks down, the clamping mechanism cannot clamp the broken electrode 3 in time due to circuit failure or other reasons.
Referring to fig. 6 to 9, a second trigger rod 12 is mounted on the base 15, one end of the second trigger rod 12 is connected with the second stopper 10 through a second pin 11, the other end of the second trigger rod 12 is connected with a second tension spring 14 and abuts against the electrode 3, and a second trigger switch 13 is arranged under the second trigger rod 12.
Before working: the trigger switch II 13 is pulled up manually, the electrode 3 is inserted into the furnace body 1 through the clamp 4, the clamping device and the electrode hole 22, when the electrode 3 descends to a proper position, the clamp 4 clamps the electrode 3, whether all trigger switches are in an opened state or not is checked, whether the positioning holes 19 on the base 15 are inserted into the corresponding positioning pins 18 or not and whether the installation of the cams 17 is correct or not is checked, and the electrode 3 starts to work after the check is completed.
When in operation, the device comprises: when the electrode 3 breaks down and the clamping mechanism cannot clamp the broken electrode 3 in time, the electrode 3 can directly fall into the furnace body 1, at the moment, the trigger rod II 12 is propped against the electrode 3, the trigger rod II 12 can be subjected to self gravity and the tension of the tension spring II 14, under the action of the two forces, the trigger rod II 12 can strike the trigger switch II 13, the trigger switch II 13 is closed, at the moment, two intact electrodes 3 are remained, the power is cut off, and because the two remaining electrodes 3 do not work, the temperature in the furnace body 1 can also be reduced, the electrode 3 broken into the furnace body 1 can not excessively pollute the furnace burden, and the quality of the furnace burden is ensured.
After working: the furnace cover 2 is opened, the electrode 3 broken in the furnace is completely fished out by using a special electrode 3 clamp, and the fished-out electrode 3 is placed in a recovery area.
Embodiment III:
working state: when the electrode 3 is operated without excessive up-down adjustment.
Referring to fig. 10, the electrode 3 may be directly designed in the shape of fig. 10, and a thickened ring shape is designed in the middle of the electrode 3, and the thickened ring portion is slightly thicker than the electrode hole 22. During normal operation of the electrode 3, the thickened ring portion is positioned between the furnace cover 2 and the holder 4, and when the electrode 3 breaks at the holder 4, the thickened ring portion of the electrode 3 is clamped just above the electrode hole 22 in the breaking process, so that the broken electrode 3 is prevented from falling into the furnace body 1. The broken electrode 3 is then placed in the recovery zone with a dedicated electrode 3 fixture.
The above three embodiments are merely illustrative of many embodiments of the present invention, and many variations are possible without departing from the principles of the present invention, which would be within the scope of the invention.
Claims (8)
1. A three-electrode ac/dc smelting furnace comprising:
The furnace comprises a furnace body (1), wherein the furnace body (1) is used for accommodating raw materials, a furnace cover (2) is arranged at the top of the furnace body (1), three round electrode holes (22) are formed in the furnace cover (2), electrodes (3) used for heating are arranged on each electrode hole (22), holders (4) are arranged at the upper ends of the electrodes (3), and an alarm is arranged on the ground around the furnace body (1);
Characterized by further comprising:
The clamping device is further arranged on the furnace cover (2) and can detect the breakage of the electrode (3) and clamp the broken electrode (3);
The clamping device comprises three electrode holes (22), a plurality of positioning pins (18) are fixedly arranged around the three electrode holes (22), a base (15) is arranged above each electrode hole (22), a driven gear (16) is rotatably arranged above each base (15), a plurality of cams (17) for clamping the electrode (3) are arranged above each driven gear (16), the cams (17) are uniformly distributed on the driven gears (16) in circumference, and a driving device is arranged on the furnace cover (2) and is used for driving the driven gears (16);
The lower end of the electrode (3) is inserted into the furnace body (1), a first trigger rod (8) is arranged below the clamp holder (4), two first limiting blocks (5) are arranged on the lower end face of the clamp holder (4), one end of the first trigger rod (8) is connected between the two first limiting blocks (5), the other end of the first trigger rod (8) is connected with a first tension spring (9), the other end of the first tension spring (9) is connected to the clamp holder (4), a first trigger switch (7) is arranged on the lower end face of the clamp holder (4), the first trigger switch (7) is matched with the first trigger rod (8), and an alarm is electrically connected to the first trigger switch (7);
One end of an eccentric wheel in the cam (17) is connected to the base (15) through a cylindrical pin, and the other end of the eccentric wheel is connected to the driven gear (16) through the cylindrical pin.
2. A three-electrode ac/dc smelting furnace according to claim 1, wherein: the driving device comprises two fixed blocks (20) arranged on the furnace cover (2), a motor (21) is arranged between the two fixed blocks (20), a driving gear (25) is arranged below the motor (21), and the driving gear (25) is meshed with a driven gear (16).
3. A three-electrode ac/dc smelting furnace according to claim 1, wherein: the cam (17) is made of 304 stainless steel.
4. A three-electrode ac/dc smelting furnace according to claim 1, wherein: the driven gear (16) is fixedly provided with a ratchet wheel (24), and the base (15) is rotatably provided with a pawl (23).
5. A three-electrode ac/dc smelting furnace according to claim 2, wherein: the base (15) is fixedly provided with a plurality of hanging rings (26), each hanging ring (26) is uniformly welded on the base (15) in circumference, the driving gear (25) and the driven gear (16) are straight teeth, each base (15) is in a stepped circular ring shape and is concentrically arranged with the electrode hole (22), the high-edge part of the base (15) is close to the electrode hole (22), the driven gear (16) is rotatably arranged above the low-edge part of the base (15), and graphite powder lubrication is adopted between the base (15) and the driven gear (16).
6. A three-electrode ac/dc smelting furnace according to claim 1, wherein: the trigger device is characterized in that a trigger rod II (12) is arranged above the base (15), two limiting blocks II (10) are arranged above the base (15), one end of the trigger rod II (12) is arranged between the two limiting blocks II (10), the other end of the trigger rod II (12) is connected with a tension spring II (14), the other end of the tension spring II (14) is connected to the base (15), a trigger switch II (13) is arranged above the base (15), the trigger switch II (13) is matched with the trigger rod II (12), and an alarm is electrically connected to the trigger switch II (13).
7. A three-electrode ac/dc smelting furnace according to claim 1, wherein: the base (15) is provided with a plurality of positioning holes (19), the positioning holes (19) correspond to cylindrical positioning pins (18) around the electrode holes (22), the positioning pins (18) are arranged on the furnace cover (2) through welding, and the positioning holes (19) are in clearance fit with the positioning pins (18).
8. A three-electrode ac/dc smelting furnace according to any one of claims 1 or 6, wherein: the first triggering rod (8) or the second triggering rod (12) is made of silicon carbide ceramics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211297735.6A CN115595400B (en) | 2022-10-22 | 2022-10-22 | Three-electrode AC/DC electric smelting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211297735.6A CN115595400B (en) | 2022-10-22 | 2022-10-22 | Three-electrode AC/DC electric smelting furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115595400A CN115595400A (en) | 2023-01-13 |
| CN115595400B true CN115595400B (en) | 2024-05-14 |
Family
ID=84848971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211297735.6A Active CN115595400B (en) | 2022-10-22 | 2022-10-22 | Three-electrode AC/DC electric smelting furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115595400B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85104310A (en) * | 1985-06-07 | 1986-12-10 | 曼内斯曼股份公司 | The arc furnace electrode of lead rupture safety device is housed |
| KR20020052878A (en) * | 2000-12-26 | 2002-07-04 | 이구택 | Device for lifting electrode of electric furnace |
| KR20020084945A (en) * | 2001-05-03 | 2002-11-16 | 주식회사 포스코 | Holder apparatus with electrode cutting detection function in electric furnace |
| KR101445039B1 (en) * | 2013-07-05 | 2014-09-29 | 주식회사 포스코 | Electronic furnace with function of electrode rod cutting detection and method for controlling the same |
| KR20170014158A (en) * | 2015-07-29 | 2017-02-08 | 주식회사 포스코 | Electric furnace |
| CN206721254U (en) * | 2017-04-11 | 2017-12-08 | 新疆八一钢铁股份有限公司 | Refining furnace electrode anti-dropout clamping device |
| CN211012397U (en) * | 2019-11-15 | 2020-07-14 | 中冶南方工程技术有限公司 | Arc furnace and furnace cover capable of clamping electrode |
| CN212077099U (en) * | 2020-03-18 | 2020-12-04 | 河北唐银钢铁有限公司 | Anti-falling device for oxygen lance |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004060826A1 (en) * | 2004-12-17 | 2006-06-29 | Sms Demag Ag | Safety device for the detection of electrode breaks |
-
2022
- 2022-10-22 CN CN202211297735.6A patent/CN115595400B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85104310A (en) * | 1985-06-07 | 1986-12-10 | 曼内斯曼股份公司 | The arc furnace electrode of lead rupture safety device is housed |
| KR20020052878A (en) * | 2000-12-26 | 2002-07-04 | 이구택 | Device for lifting electrode of electric furnace |
| KR20020084945A (en) * | 2001-05-03 | 2002-11-16 | 주식회사 포스코 | Holder apparatus with electrode cutting detection function in electric furnace |
| KR101445039B1 (en) * | 2013-07-05 | 2014-09-29 | 주식회사 포스코 | Electronic furnace with function of electrode rod cutting detection and method for controlling the same |
| KR20170014158A (en) * | 2015-07-29 | 2017-02-08 | 주식회사 포스코 | Electric furnace |
| CN206721254U (en) * | 2017-04-11 | 2017-12-08 | 新疆八一钢铁股份有限公司 | Refining furnace electrode anti-dropout clamping device |
| CN211012397U (en) * | 2019-11-15 | 2020-07-14 | 中冶南方工程技术有限公司 | Arc furnace and furnace cover capable of clamping electrode |
| CN212077099U (en) * | 2020-03-18 | 2020-12-04 | 河北唐银钢铁有限公司 | Anti-falling device for oxygen lance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115595400A (en) | 2023-01-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115595400B (en) | Three-electrode AC/DC electric smelting furnace | |
| KR101330318B1 (en) | Assembling apparatus of electrode | |
| CA1050091A (en) | Force sensing control apparatus and method for electric arc furnaces | |
| CN100525553C (en) | Safety device for detecting electrode breakage | |
| JP5947310B2 (en) | Self-baking electrode top edge detection device and self-baking electrode top edge management method | |
| KR101280463B1 (en) | Apparatus measuring height of molten materials in electric furnace | |
| CN210274594U (en) | Arc striking device of double-electrode direct-current electric arc furnace | |
| CN203360252U (en) | Fixing base for quartz crucible used for producing optical glass clinker | |
| CN219473671U (en) | Electrode lifting device | |
| JPH10332268A (en) | Molten metal sensing method for base metal in electric ash melting furnace | |
| CN216308593U (en) | Ignition ring rotating structure | |
| KR102139056B1 (en) | Apparatus for determining cause of soderberg electorde breakage in submerged arc furnace determining method of the same | |
| CN216790836U (en) | Electric furnace for producing ferroboron | |
| KR100762461B1 (en) | Long life span center piece for ladle arc furnace | |
| CN110167226B (en) | Arc striking device and method for double-electrode direct-current arc furnace | |
| RU2748222C1 (en) | Electric contact device for ore-thermal furnace with graphite electrode | |
| CN216858546U (en) | Cold centering device of electric arc based on arm | |
| CN216473412U (en) | Striking starting structure for high-temperature alloy smelting | |
| CN210641089U (en) | Compound electric installation of hot stove in ore deposit | |
| CN211526472U (en) | Safe type silicon nitride ignition stick | |
| CN210480589U (en) | Electrode fishing device | |
| CN214868028U (en) | Automatic spot welder with protection shield | |
| CN213356805U (en) | Lifting limiting adjusting device for electric furnace steel-making furnace cover | |
| CN212388088U (en) | Novel monopole electroslag furnace | |
| CN216694428U (en) | Well type resistance furnace for heating workpieces |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20240411 Address after: Taihe Industrial Park, Yongxing Economic Development Zone, Chenzhou City, Hunan Province Applicant after: Yongxing Yonghe precious metal Co.,Ltd. Country or region after: China Address before: Room 1101, Building 2, Shangliao Garden, Shajing Street, Bao'an District, Shenzhen, Guangdong 518100 Applicant before: Su Haixuan Country or region before: China |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |