CN110167226A - A kind of double electrode direct current arc furnace arc initiation device and its method - Google Patents
A kind of double electrode direct current arc furnace arc initiation device and its method Download PDFInfo
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- CN110167226A CN110167226A CN201910387959.8A CN201910387959A CN110167226A CN 110167226 A CN110167226 A CN 110167226A CN 201910387959 A CN201910387959 A CN 201910387959A CN 110167226 A CN110167226 A CN 110167226A
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000000977 initiatory effect Effects 0.000 title claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 57
- 229910052751 metal Inorganic materials 0.000 claims abstract description 57
- 239000002893 slag Substances 0.000 claims abstract description 35
- 238000002844 melting Methods 0.000 claims abstract description 32
- 230000008018 melting Effects 0.000 claims abstract description 32
- 238000007711 solidification Methods 0.000 claims abstract description 26
- 230000008023 solidification Effects 0.000 claims abstract description 26
- 238000012790 confirmation Methods 0.000 claims description 21
- 230000005611 electricity Effects 0.000 claims description 13
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 230000007423 decrease Effects 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 8
- 239000000155 melt Substances 0.000 claims description 8
- 238000010309 melting process Methods 0.000 claims description 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 239000010805 inorganic waste Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009297 electrocoagulation Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces heated electrically, with or without any other source of heat
- F27B3/085—Arc furnaces
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B7/00—Heating by electric discharge
- H05B7/02—Details
- H05B7/10—Mountings, supports, terminals or arrangements for feeding or guiding electrodes
- H05B7/109—Feeding arrangements
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Discharge Heating (AREA)
Abstract
The invention discloses a kind of double electrode direct current arc furnace arc initiation device and its methods, include melting furnace, DC power supply, anode electrode, cathode electrode, anode voltage measuring unit, cathode voltage measuring unit, striking metal plate, metallic ground pole and thermocouple, anode resistance one end is connect with DC power anode, cathode resistor one end is connect with DC power cathode, the anode resistance other end and the cathode resistor other end are grounded, anode voltage measuring unit both ends are connect with anode resistance both ends respectively, cathode voltage measuring unit both ends are connect with cathode resistor both ends respectively, striking metal plate is horizontally set on the upper side of solidification molten slag layer, metallic ground pole penetrates in melting furnace from melting furnace lower end and metallic ground pole upper end is contacted with frozen metal layer, metallic ground pole lower end ground connection, thermocouple setting is extremely interior in metallic ground.Strong operability of the present invention, arcing initiation success rate is high, can transform automatic control program as easily, realize full-automatic striking.
Description
Technical field
The present invention relates to a kind of electric arc furnaces arc initiation device and its method, especially a kind of double electrode direct current arc furnace striking dress
It sets and its method.
Background technique
Direct-current plasma arc melting technique is flying dust/inorganic waste melting furnace mode more commonly used at present.It is logical
The thermal energy for crossing direct-current arc generation melts flying dust/inorganic waste.Bipolar electrode direct-current arc technology, such as
Bipolar electrode interaction anode and cathode is eliminated conducting hearth electrode by CN201710305547.6, simplifies bottom construction design, has
Good process controllability.Bipolar electrode arc furnace bottom is provided with metal layer earthing or grounding means, to detect cathode side and anode-side
Voltage, and execute striking step, as shown in Figure 3.Herein, we define the striking stage starts since electric arc, directly
Terminate to initial furnace charge is melted completely.The brief striking step of double electrode direct current arc furnace includes: that anode 3 declines, until anode
Voltage is 0V, 3 short circuit of anode；Cathode 4 declines, until cathode voltage is 0V, 4 short circuit of cathode, bipolar electrode Arc System forms logical
Road；Cathode 4 is promoted to certain altitude, generates cathode arc；Anode 3 is promoted to certain altitude, generates anode arc；Melt striking metal
Plate 7 and other furnace charges 15, until melting, striking step terminate completely, reaching allows the state of feeding intake.
As it can be seen that arc circuit is accessed in metallic ground pole 8 always in striking operation, with real-time judge anode and cathode electricity
Pressure, the mark as characterization Arc System state.Generally use overflow and slag in electric arc furnaces or topple over deslagging, no matter which kind of mode
Always some slag and metal layer stay in furnace.Therefore, after each blowing out, non-conductive solidification molten slag layer is formed in furnace bottom
The frozen metal layer covered with it, such as Fig. 3.Unless removing this layer of solidification molten slag layer, otherwise metallic ground playing stokehold again
Pole 8 can not access arc circuit, thus can not reuse striking method as above.In fact, removing solidification molten slag layer can consume
Take a large amount of manpower and material resources, significantly elongation furnace outage time, reduces production efficiency.
To solve this difficulty, there are two types of typical methods to be used to solve drawing in the case of above-mentioned solidification molten slag layer exists at present
Arch problem.
The first: such as the JP10253266 of Hitachi's shipbuilding, arranging the composition granule (striking of certain amount conduction between bipolar electrode
Agent 16, as shown in Figure 4), slag layer surface formed one layer of conductive layer, may be implemented in this way arc circuit closure, and striking at
Function.Its problem is that the electric conductivity of particulate material is unreliable, while granular mass is lighter, is easy to be dispelled by arc plasma.This can lead
It is unstable to send a telegraph arc discharge, is easy to happen current interruption；Simultaneously as metallic ground pole is interdicted by molten slag layer, electric arc electricity can not be accessed
Road, original striking step are not available.
Second, such as the JP2002213726 of Mitsubishi Heavy Industries Ltd.Electrode is inserted into metal layer before molten slag layer solidifies.It is needing
Main electrode is truncated when striking, by Yin/Yang pole and the striking electric discharge between the fracture electrode of molten slag layer, formation connection electric arc are electric
Road, as shown in Figure 5.Compared to method one, the problem of partition this method solve metal layer earthing pole.But it is broken electrode section quilt
Arc erosion is no longer flat, and guiding discharge is unstable；Meanwhile molten bath melt completely after have graphite scrap and swim in molten bath table
Face, easily blocking slag-drip opening 14, influence deslagging.
Therefore, in conclusion existing two methods are defective at present:
First method is only theoretical feasible, it is difficult to guarantee arcing initiation success rate, also not provide novel arc striking method；
Second method can also generate graphite electrode fragment in addition to striking is unstable, there is the hidden danger of obstruction slag-drip opening.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of double electrode direct current arc furnace arc initiation device and its methods, mention
High arcing initiation success rate.
In order to solve the above technical problems, the technical scheme adopted by the invention is that:
A kind of double electrode direct current arc furnace arc initiation device, it is characterised in that: include melting furnace, DC power supply, anode electrode, cathode
Electrode, anode voltage measuring unit, cathode voltage measuring unit, striking metal plate, metallic ground pole and thermocouple, anode electrode
It is connect with DC power anode, cathode electrode is connect with DC power cathode, and anode electrode and cathode electrode are slidably arranged in molten
Melt furnace upper end, anode resistance one end is connect with DC power anode, and cathode resistor one end is connect with DC power cathode, anode electricity
The resistance other end and the cathode resistor other end are grounded, and anode voltage measuring unit both ends are connect with anode resistance both ends respectively, yin
Pole tension measuring unit both ends are connect with cathode resistor both ends respectively, and striking metal plate is horizontally set on the upside of solidification molten slag layer
On face, metallic ground pole penetrates in melting furnace from melting furnace lower end and metallic ground pole upper end is contacted with frozen metal layer, gold
Belong to earthing pole lower end ground connection, thermocouple setting is extremely interior in metallic ground.
Further, the anode electrode and cathode electrode are separately positioned on melting furnace upper end and can be in melting furnaces
It goes up and down along vertical direction.
Further, the melting furnace side is provided with slag-drip opening.
Further, the metallic ground extremely interior be provided with is arranged with the matched through-hole of thermocouple, thermocouple in metallic ground
For measuring frozen metal layer temperature in through-hole in extremely.
Further, the anode electrode and cathode electrode are arranged on up-down drive device and are driven by up-down drive device
It is dynamic to go up and down, displacement sensor is additionally provided on anode electrode.
A kind of double electrode direct current arc furnace striking method, it is characterised in that comprise the steps of:
Step 1: anode electrode is dropped into striking metal plate upper side and confirms contact；
Step 2: cathode electrode is dropped into striking metal plate upper side and confirms contact；
Step 3: the complete molten condition confirmation of solidification molten slag layer, the electricity of anode voltage measuring unit and cathode voltage measuring unit
Confirmation solidification molten slag layer melts completely when pressure value becomes not identical；
Step 4: the molten condition confirmation completely of frozen metal layer, when electric thermo-couple temperature is more than 350-450 DEG C, confirmation solidification gold
Belong to layer to melt completely.
Further, the step 1 works as sun specifically by the driving device driving anode electrode decline of anode electrode
When pole electrode lower end touches striking metal plate, driving device remains as open state at this time, and displacement sensor receives reality
Border displacement is 0, then controls driving device and stop and confirm anode electrode lower end contacting ignition arc metal plate.
Further, driving device driving cathode electrode decline of the step 2 specifically by cathode electrode, cathode
During electrode decline, cathode electrode is vacantly to open circuit between two electrodes, and anode voltage measuring unit and cathode are electric at this time
What pressure measuring unit measured is the voltage of cathode resistor and cathode resistor respectively, and anode resistance is identical with cathode resistor resistance value,
Anode voltage measuring unit is identical with the voltage value of cathode voltage measuring unit and half that be direct current power source voltage, when cathode electricity
When pole lower end and striking metal plate contact, anode electrode is connected to form short circuit with cathode electrode by striking metal plate, this
When anode voltage measuring unit and cathode voltage measuring unit voltage value be 0V, while measure DC power supply output electric current it is big
It is small, when voltage value becomes 0V and size of current reaches preset threshold value, confirmation cathode electrode lower end and striking metal
Plate contact.
Further, the step 3 is specially and carries out striking in melting furnace to melt molten slag layer is solidified, and is melting
In the process, since solidification molten slag layer is measured in insulation, at this time anode voltage measuring unit and cathode voltage measuring unit
It is the voltage that the partial pressure value of anode resistance and cathode resistor, i.e. anode voltage measuring unit and cathode voltage measuring unit measure
Value be it is equal, when solidifying the complete burn through of molten slag layer, anode electrode and cathode electrode lower end and conductive solidification metal layer are connected
And be grounded by metallic ground pole, what anode voltage measuring unit measured is the virtual voltage of anode electrode, cathode voltage at this time
What measuring unit measured is the virtual voltage of cathode electrode, what anode voltage measuring unit and cathode voltage measuring unit measured
Voltage value is no longer equal, therefore the voltage value measured when anode voltage measuring unit and cathode voltage measuring unit is from equal change
Whens being not equal, confirmation solidification molten slag layer melts completely.
Further, the step 4 is specially the temperature of thermocouple real-time measurement frozen metal layer, in melting process,
Electric thermo-couple temperature constantly increases, and when electric thermo-couple temperature is more than 350-450 DEG C, metallic ground pole upper end temperature has reached 1500 at this time
DEG C, confirmation frozen metal layer melts completely, and striking state terminates.
Compared with prior art, the present invention having the following advantages that and effect:
1, characterizing method of the present invention and data are clear, and strong operability, arcing initiation success rate is high, can transform automatic control journey as easily
Sequence realizes full-automatic striking；
2, graphite electrode fragment will not be generated in molten bath, do not block the risk of excessive slag-drip opening；
3, various working is adapted to, it is suitable for operating condition of the furnace bottom without solidification molten slag layer.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of double electrode direct current arc furnace arc initiation device of the invention.
Fig. 2 is a kind of flow chart of double electrode direct current arc furnace striking method of the invention.
Fig. 3 is the electric arc furnaces striking method schematic diagram of the prior art.
Fig. 4 is prior art Hitachi shipyard striking method schematic diagram.
Fig. 5 is prior art Mitsubishi striking method schematic diagram.
Specific embodiment
Below by embodiment, the present invention is described in further detail, following embodiment be explanation of the invention and
The invention is not limited to following embodiments.
As shown in Figure 1, a kind of double electrode direct current arc furnace arc initiation device of the invention, comprising melting furnace 1, DC power supply 2,
Anode electrode 3, cathode electrode 4, anode voltage measuring unit 5, cathode voltage measuring unit 6, striking metal plate 7, metallic ground
Pole 8 and thermocouple 9, anode electrode 3 are connect with 2 anode of DC power supply, and cathode electrode 4 is connect with 2 cathode of DC power supply, anode electricity
Pole 3 and cathode electrode 4 are slidably arranged in 1 upper end of melting furnace, and 10 one end of anode resistance is connect with 2 anode of DC power supply, cathode electricity
It hinders 11 one end to connect with 2 cathode of DC power supply, 10 other end of anode resistance and 11 other end of cathode resistor are grounded, anode voltage
5 both ends of measuring unit are connect with 10 both ends of anode resistance respectively, 6 both ends of cathode voltage measuring unit respectively with 11 liang of cathode resistor
End connection, striking metal plate 7 are horizontally set on the upper side of solidification molten slag layer 12, and metallic ground pole 8 is worn from 1 lower end of melting furnace
Enter in melting furnace 1 and 8 upper end of metallic ground pole is contacted with frozen metal layer 13,8 lower end of metallic ground pole ground connection, thermocouple 9
It is arranged in metallic ground pole 8.
Anode electrode 3 and cathode electrode 4 are separately positioned on 1 upper end of melting furnace and can be in melting furnaces 1 along vertical
Direction lifting.Anode electrode 3 and cathode electrode 4 are arranged on up-down drive device to be driven by up-down drive device and go up and down, sun
Displacement sensor is additionally provided on pole electrode 3 for detecting the displacement state of anode electrode 3.
1 side of melting furnace is provided with slag-drip opening 14.It is provided in metallic ground pole 8 and the matched through-hole of thermocouple 9, thermocouple 9
For measuring frozen metal 13 temperature of layer in the through-hole being arranged in metallic ground pole 8.
A kind of double electrode direct current arc furnace striking method comprising the steps of:
Step 1: anode electrode is dropped into striking metal plate upper side and confirms contact；
Slag layer surface striking being placed on by manhole/service hatch with metal plate immediately below bipolar electrode；Pass through anode electrode
Driving device driving anode electrode decline, when anode electrode lower end touches striking metal plate, driving device is still at this time
For open state, and it is 0 that displacement sensor, which receives actual displacement, then controls driving device and stop and confirm anode electrode lower end
Contacting ignition arc metal plate.
Step 2: cathode electrode is dropped into striking metal plate upper side and confirms contact；
Drive cathode electrode decline by the driving device of cathode electrode, during cathode electrode decline, cathode electrode vacantly from
And it is breaking between two electrodes, what anode voltage measuring unit and cathode voltage measuring unit measured at this time is cathode resistor respectively
With the voltage of cathode resistor, anode resistance is identical with cathode resistor resistance value, anode voltage measuring unit and cathode voltage measurement
The voltage value of unit is identical and is the half of direct current power source voltage, when cathode electrode lower end is contacted with striking metal plate,
Anode electrode is connected to form short circuit with cathode electrode by striking metal plate, and anode voltage measuring unit and cathode voltage are surveyed at this time
The voltage value for measuring unit is 0V, while measuring DC power supply output size of current, when voltage value becomes 0V and size of current reaches
When to preset threshold value, confirmation cathode electrode lower end is contacted with striking metal plate.
Step 3: the complete molten condition confirmation of solidification molten slag layer, anode voltage measuring unit and cathode voltage measuring unit
Voltage value when becoming not identical confirmation solidification molten slag layer melt completely；
Pull-up cathode forms until supply voltage is 100V and stablizes cathode arc；When detecting that supply voltage reaches 150V, pull-up
Anode makes arc voltage reach 230V, the equal stable operation of cathode and anode electric arc；Carry out in melting furnace striking will solidify molten slag layer into
Row melting, in melting process, since solidification molten slag layer is insulation, anode voltage measuring unit and cathode voltage measurement at this time
What is measured on unit is the partial pressure value of anode resistance and cathode resistor, i.e. anode voltage measuring unit and cathode voltage measuring unit
The voltage value measured be it is equal, when solidifying the complete burn through of molten slag layer, anode electrode and cathode electrode lower end and conduction electrocoagulation
Gu metal layer is connected and passes through metallic ground pole and is grounded, what anode voltage measuring unit measured is the practical electricity of anode electrode at this time
Pressure, what cathode voltage measuring unit measured is the virtual voltage of cathode electrode, anode voltage measuring unit and cathode voltage measurement
The voltage value that unit measures is no longer equal, therefore works as the electricity that anode voltage measuring unit and cathode voltage measuring unit measure
Pressure value from it is equal become not equal whens, confirmation solidification molten slag layer melts completely.When detecting that cathode voltage and anode voltage surpass
20V difference is crossed, illustrates the complete burn through of molten slag layer, furnace bottom earthing pole restitution.So far anode, cathode voltage measuring unit and can
Correct measurement cathode and anode voltage.
Step 4: the molten condition confirmation completely of frozen metal layer, when electric thermo-couple temperature is more than 350-450 DEG C, confirmation is solidifying
Gu metal layer melts completely.
The temperature of thermocouple real-time measurement frozen metal layer, in melting process, electric thermo-couple temperature constantly increases, and works as thermoelectricity
Even temperature is more than 350-450 DEG C, and metallic ground pole upper end temperature has reached 1500 DEG C at this time, and confirmation frozen metal layer is complete
Melting, striking state terminate.Cathode and anode voltage and current parameters are adjusted respectively, molten bath is made to continue to melt, until metal connects
Thermocouple measured temperature reaches 400 DEG C in earth polar.So far, material melts completely in melting furnace, and striking operation terminates.
Above content is only illustrations made for the present invention described in this specification.Technology belonging to the present invention
The technical staff in field can do various modifications or supplement or is substituted in a similar manner to described specific embodiment, only
It should belong to guarantor of the invention without departing from the content or beyond the scope defined by this claim of description of the invention
Protect range.
Claims (10)
1. a kind of double electrode direct current arc furnace arc initiation device, it is characterised in that: include melting furnace, DC power supply, anode electrode, yin
Pole electrode, anode voltage measuring unit, cathode voltage measuring unit, striking metal plate, metallic ground pole and thermocouple, anode electricity
Pole is connect with DC power anode, and cathode electrode is connect with DC power cathode, and anode electrode and cathode electrode are slidably arranged in
Furnace upper end is melted, anode resistance one end is connect with DC power anode, and cathode resistor one end is connect with DC power cathode, anode
The resistance other end and the cathode resistor other end are grounded, and anode voltage measuring unit both ends are connect with anode resistance both ends respectively,
Cathode voltage measuring unit both ends are connect with cathode resistor both ends respectively, and striking metal plate is horizontally set on the upper of solidification molten slag layer
On side, metallic ground pole penetrates in melting furnace from melting furnace lower end and metallic ground pole upper end is contacted with frozen metal layer,
Metallic ground pole lower end ground connection, thermocouple setting are extremely interior in metallic ground.
2. a kind of double electrode direct current arc furnace arc initiation device described in accordance with the claim 1, it is characterised in that: the anode electrode
Melting furnace upper end is separately positioned on cathode electrode and can be gone up and down along vertical direction in melting furnace.
3. a kind of double electrode direct current arc furnace arc initiation device described in accordance with the claim 1, it is characterised in that: the melting furnace side
Face is provided with slag-drip opening.
4. a kind of double electrode direct current arc furnace arc initiation device described in accordance with the claim 1, it is characterised in that: the metallic ground
It is provided in extremely and is arranged in the extremely interior through-hole of metallic ground with the matched through-hole of thermocouple, thermocouple for measuring frozen metal layer
Temperature.
5. a kind of double electrode direct current arc furnace arc initiation device described in accordance with the claim 1, it is characterised in that: the anode electrode
It is arranged on up-down drive device to be driven by up-down drive device with cathode electrode and go up and down, be additionally provided with displacement on anode electrode
Sensor.
6. a kind of double electrode direct current arc furnace striking method, it is characterised in that comprise the steps of:
Step 1: anode electrode is dropped into striking metal plate upper side and confirms contact；
Step 2: cathode electrode is dropped into striking metal plate upper side and confirms contact；
Step 3: the complete molten condition confirmation of solidification molten slag layer, the electricity of anode voltage measuring unit and cathode voltage measuring unit
Confirmation solidification molten slag layer melts completely when pressure value becomes not identical；
Step 4: the molten condition confirmation completely of frozen metal layer, when electric thermo-couple temperature is more than 350-450 DEG C, confirmation solidification gold
Belong to layer to melt completely.
7. a kind of double electrode direct current arc furnace striking method according to claim 6, it is characterised in that: the step 1 tool
Body is to drive anode electrode decline by the driving device of anode electrode, when anode electrode lower end touches striking metal plate,
Driving device remains as open state at this time, and it is 0 that displacement sensor, which receives actual displacement, then controls driving device and stop simultaneously
Confirm anode electrode lower end contacting ignition arc metal plate.
8. a kind of double electrode direct current arc furnace striking method according to claim 6, it is characterised in that: the step 2 tool
Body is that cathode electrode decline is driven by the driving device of cathode electrode, during cathode electrode decline, cathode electrode vacantly from
And it is breaking between two electrodes, what anode voltage measuring unit and cathode voltage measuring unit measured at this time is cathode resistor respectively
With the voltage of cathode resistor, anode resistance is identical with cathode resistor resistance value, anode voltage measuring unit and cathode voltage measurement
The voltage value of unit is identical and is the half of direct current power source voltage, when cathode electrode lower end is contacted with striking metal plate,
Anode electrode is connected to form short circuit with cathode electrode by striking metal plate, and anode voltage measuring unit and cathode voltage are surveyed at this time
The voltage value for measuring unit is 0V, while measuring DC power supply output size of current, when voltage value becomes 0V and size of current reaches
When to preset threshold value, confirmation cathode electrode lower end is contacted with striking metal plate.
9. a kind of double electrode direct current arc furnace striking method according to claim 6, it is characterised in that: the step 3 tool
Body is to carry out striking in melting furnace to melt molten slag layer is solidified, in melting process, since solidification molten slag layer is insulation,
What is measured in anode voltage measuring unit and cathode voltage measuring unit at this time is the partial pressure value of anode resistance and cathode resistor, i.e.,
The voltage value that anode voltage measuring unit and cathode voltage measuring unit measure be it is equal, when solidification the complete burn through of molten slag layer
When, anode electrode and cathode electrode lower end are connected with conduction solidification metal layer and pass through metallic ground pole and be grounded, at this time anode electricity
What pressure measuring unit measured is the virtual voltage of anode electrode, and what cathode voltage measuring unit measured is the practical electricity of cathode electrode
Pressure, the voltage value that anode voltage measuring unit and cathode voltage measuring unit measure is no longer equal, therefore when anode voltage is surveyed
Amount unit and the voltage value that measures of cathode voltage measuring unit from it is equal become not equal whens, confirmation solidification molten slag layer is completely molten
Melt.
10. a kind of double electrode direct current arc furnace striking method according to claim 6, it is characterised in that: the step 4
The specially temperature of thermocouple real-time measurement frozen metal layer, in melting process, electric thermo-couple temperature constantly increases, and works as thermocouple
Temperature is more than 350-450 DEG C, and metallic ground pole upper end temperature has reached 1500 DEG C at this time, and confirmation frozen metal layer is completely molten
Melt, striking state terminates.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910387959.8A CN110167226B (en) | 2019-05-10 | 2019-05-10 | Arc striking device and method for double-electrode direct-current arc furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910387959.8A CN110167226B (en) | 2019-05-10 | 2019-05-10 | Arc striking device and method for double-electrode direct-current arc furnace |
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| CN110167226A true CN110167226A (en) | 2019-08-23 |
| CN110167226B CN110167226B (en) | 2024-06-04 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1424578A (en) * | 1973-01-25 | 1976-02-11 | Standard Messo Duisburg | Arc heating apparatus |
| US4654858A (en) * | 1985-04-19 | 1987-03-31 | General Electric Company | Cold hearth melting configuration and method |
| US5809055A (en) * | 1994-03-30 | 1998-09-15 | Mannesmann Aktiengesellschaft | Metallurgical vessel heated by direct current and having a bottom electrode |
| CN104115554A (en) * | 2011-11-24 | 2014-10-22 | 西马克·西马格公司 | Electric arc furnace and method for operating same |
| CN210274594U (en) * | 2019-05-10 | 2020-04-07 | 江苏天楹环保能源成套设备有限公司 | Arc striking device of double-electrode direct-current electric arc furnace |
-
2019
- 2019-05-10 CN CN201910387959.8A patent/CN110167226B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1424578A (en) * | 1973-01-25 | 1976-02-11 | Standard Messo Duisburg | Arc heating apparatus |
| US4654858A (en) * | 1985-04-19 | 1987-03-31 | General Electric Company | Cold hearth melting configuration and method |
| US5809055A (en) * | 1994-03-30 | 1998-09-15 | Mannesmann Aktiengesellschaft | Metallurgical vessel heated by direct current and having a bottom electrode |
| CN104115554A (en) * | 2011-11-24 | 2014-10-22 | 西马克·西马格公司 | Electric arc furnace and method for operating same |
| CN210274594U (en) * | 2019-05-10 | 2020-04-07 | 江苏天楹环保能源成套设备有限公司 | Arc striking device of double-electrode direct-current electric arc furnace |
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| Publication number | Publication date |
|---|---|
| CN110167226B (en) | 2024-06-04 |
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