CN110285667A - A kind of automatic control system and its control method of direct current electric arc furnace - Google Patents
A kind of automatic control system and its control method of direct current electric arc furnace Download PDFInfo
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- CN110285667A CN110285667A CN201910392463.XA CN201910392463A CN110285667A CN 110285667 A CN110285667 A CN 110285667A CN 201910392463 A CN201910392463 A CN 201910392463A CN 110285667 A CN110285667 A CN 110285667A
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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
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/28—Arrangement of controlling, monitoring, alarm or the like devices
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Abstract
The invention discloses a kind of automatic control system of direct current electric arc furnace and its control methods, include infrared thermometry device, cathode electrode, electrode lifting device, in-furnace temperature control sensor, power-supply device, voltage control sensor, anode electrode, dump temperature control sensor, discharge infrared thermometry device and feed control device in direct-current arc furnace body, furnace.Voltage value between direct-current arc furnace body inner cathode electrode and anode electrode is acquired, is calculated with the lifting of preset voltage value difference coordination electrode lifting device to adjust voltage value；In-furnace temperature is acquired, the size of current with preset temperature difference control DC power supply is calculated；The temperature of charge of discharge gate outflow is acquired, calculates and controls inlet amount with preset temperature difference.The present invention is modified voltage, electric arc, charging rate etc. using different controling parameters, avoids the cross influence of factors above, realizes the full automation control of direct current electric arc furnace.
Description
Technical field
The present invention relates to a kind of automatic control system and its control method, especially a kind of automatic control of direct current electric arc furnace
System and its control method.
Background technique
Direct current electric arc furnace is to generate electric arc on metal charge between hearth electrode (anode) and graphite electrode (cathode)
It is smelted.The main distinction of direct current electric arc furnace and alternating current arc furnace apparatus: increase fairing, roof carbon electrode by three
Become one and add hearth electrode etc..Wherein the setting of hearth electrode is the maximum feature of direct current electric arc furnace.Direct current electric arc furnace
Major advantage have: arc stability and concentration, melting bath stirring is good, and in-furnace temperature is evenly distributed, and lining wear amount is few；Electric current and
Voltage fluctuation is small, reduces to the impact of power grid, and cable life extends therewith；Export license is few, the exchange of ton material consumption rate of electrodes
Electric arc furnaces few 50%.But in direct current electric arc furnace operational process, the operating parameter of direct current electric arc furnace, while by charging rate,
The influence of electric arc output power (including voltage and current).Because voltage intercouples with electric current and affects one another, direct current
In arc furnace operational process, once fluctuation of operating conditions occurs, operating condition often rule of thumb can only be slowly adjusted, realizes to automatically control and compare
It is difficult.
When direct current electric arc furnace is run, resistance value between anodic-cathodic is positively correlated at a distance from anodic-cathodic.Yin-yang electricity
The spacing of pole is bigger, and the arc resistance value between anodic-cathodic is bigger.Therefore general direct current electric arc furnace autocontrol method, it is main
To be controlled for power supply and lifting device (a kind of automatic regulating device of DC electric arc furnace electrode of CN101782321A- and its
Control method), there are mainly two types of control modes:
1, supply voltage is set fixed value by constant voltage control methods, becomes larger when fluctuation occurs for electric current, then between anodic-cathodic
Virtual voltage U=I*R is greater than setting voltage value.Automatic control system declines cathode electrode at this time, and resistance value is enabled to reduce, so that
Actual voltage value is restored to setting value.Otherwise become smaller when fluctuation occurs for electric current, then virtual voltage U=I*R between anodic-cathodic,
Less than setting voltage value.Automatic control system rises cathode electrode at this time, and resistance value is enabled to increase, so that actual voltage value restores
To setting value.
2, constant current control method: setting fixed value for source current, when voltage occur fluctuation become larger, then anodic-cathodic it
Between actual current I=U/R, be greater than setting electric current value.Automatic control system rises cathode electrode at this time, and resistance value is enabled to increase,
So that actual current value is restored to setting value.Otherwise when voltage occur fluctuation become smaller, then the actual current I between anodic-cathodic=
U/R is less than setting electric current value.Automatic control system declines cathode electrode at this time, and resistance value is enabled to reduce, so that actual current value
It is restored to setting value.
The limitation of this two kinds of traditional control methods is, can only for power supply itself (electric current, voltage) parameter fluctuation into
Row is adjusted, and cannot be to furnace temperature, and the parameters such as deslagging temperature, which are made, to be automated toed respond to.Substantially, power supply and rise fall of electrodes can only be realized
The automatic control of device, and can not achieve the whole of direct current electric arc furnace and automatically control.However in actual moving process, either
Charging rate or deslagging temperature can all have an impact the operating condition of direct current electric arc furnace.Using traditional control method, only
Rule of thumb these parameter fluctuations can be judged by operator, be adjusted manually, but be reduction of in fact in this way
The degree of automation of equipment.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of automatic control system of direct current electric arc furnace and its controlling parties
Method realizes the full automation control of direct current electric arc furnace.
In order to solve the above technical problems, the technical scheme adopted by the invention is that:
A kind of automatic control system of direct current electric arc furnace, it is characterised in that: include infrared thermometry in direct-current arc furnace body, furnace
Device, cathode electrode, electrode lifting device, in-furnace temperature control sensor, power-supply device, voltage control sensor, anode electricity
Pole, dump temperature control sensor, discharge infrared thermometry device and feed control device, cathode electrode are vertically arranged in direct current
Electric arc furnace body upper end, anode electrode, which is arranged on electrode lifting device, to be driven by electrode lifting device in direct-current arc furnace body
Interior oscilaltion, voltage control sensor and cathode electrode and anode electrode connection are for voltage value between measuring electrode, voltage
Control sensor is connect for sending elevating control signal with electrode lifting device, and infrared thermometry device is fixed on direct current in furnace
Electric arc furnace body upper end, infrared thermometry device is connect with in-furnace temperature control sensor for acquiring bath temperature in furnace in furnace
And it is sent to in-furnace temperature control sensor, power-supply device is connect for powering to electrode with cathode electrode and anode electrode, furnace
Interior temperaturecontrol sensor is connect for sending current controling signal with power-supply device, and feed control device is arranged in direct-current arc
Furnace body upper end feed inlet, discharge infrared thermometry device are arranged in direct-current arc furnace body side discharge port position and discharge
Infrared thermometry device connect temperature of charge and the row of being sent to for acquiring discharge port outflow with dump temperature control sensor
Expect that temperaturecontrol sensor, dump temperature control sensor are connect for sending charging control signal with feed control device.
Further, the in-furnace temperature control sensor includes in-furnace temperature DCS, in-furnace temperature computing module and power supply
Current controling signal trigger module, in-furnace temperature DCS are connect for by infrared thermometry in furnace with infrared thermometry device in furnace
Bath temperature is compared with the preset bath temperature of DCS in furnace in the furnace of device acquisition, in-furnace temperature computing module and in-furnace temperature
DCS connection is used to calculate the difference of bath temperature and the preset bath temperature of DCS in furnace in the furnace of acquisition, Source Current Control letter
Number trigger module connect with in-furnace temperature computing module the difference for being calculated according to in-furnace temperature computing module generate it is straight
The voltage control signal in galvanic electricity source is simultaneously sent to DC power supply.
Further, the voltage control sensor includes voltage measurement module, voltage DCS, voltage operational module, lifting
Signal trigger module is controlled, voltage measurement module connects cathode electrode and anode electrode for voltage value between acquisition electrode, electricity
Pressure DCS and voltage measurement module connection are for carrying out pair voltage value between the electrode of acquisition and the preset voltage value of voltage DCS
Than, the difference of voltage value and preset voltage value between the electrode of voltage operational module and voltage DCS connection for calculating acquisition,
Elevating control signal trigger module connect the voltage difference for obtaining by voltage operational module with voltage operational module and generates
The control signal of electrode lifting device is simultaneously sent to electrode lifting device.
Further, the dump temperature control sensor includes dump temperature DCS, dump temperature computing module and charging
Signal trigger module is controlled, dump temperature DCS is connect for by discharge infrared thermometry device with discharge infrared thermometry device
The temperature of charge and the preset temperature of charge of discharge DCS of the discharge port outflow of acquisition compare, dump temperature computing module and discharge
Temperature DCS connection is used to calculate the temperature of charge of the discharge port outflow of acquisition and the difference of the preset temperature of charge of discharge DCS, into
Material control signal trigger module connect the difference for being calculated according to dump temperature computing module with dump temperature computing module
Value generates the charging control signal of feed control device and is sent to feed control device.
A kind of autocontrol method of direct current electric arc furnace, it is characterised in that comprise the steps of:
Voltage is adjusted: voltage value between acquisition direct-current arc furnace body inner cathode electrode and anode electrode, and by the voltage of the acquisition
Value is compared with preset voltage value, and calculating difference is simultaneously gone up and down by difference coordination electrode lifting device to adjust voltage value；
In-furnace temperature is adjusted: acquisition in-furnace temperature, and temperature collection and preset temperature are compared, and calculating difference simultaneously passes through difference control
The size of current of DC power supply processed；
Dump temperature is adjusted: the temperature of charge of acquisition discharge gate outflow, and temperature collection and preset temperature is compared, calculating difference
And inlet amount is controlled by difference.
Further, it is specially to set between the cathode electrode and anode electrode of direct-current arc furnace body that the voltage, which is adjusted,
Voltage control sensor is set, the voltage measurement module of voltage control sensor acquires between cathode electrode and anode electrode in real time
Voltage value, voltage DCS compare voltage value between the electrode of acquisition and the preset voltage value of voltage DCS, then pass through electricity
Pressure computing module calculates the difference of voltage value and preset voltage value between the electrode of acquisition, and elevating control signal trigger module is logical
The voltage difference that overvoltage computing module obtains generates the control signal of electrode lifting device and is sent to electrode lifting device, electricity
Pole lifting device receive control signal after by internal actuator to cathode electrode height progress lift adjustment, cause cathode electrode
The variation of arc length between anode electrode makes it most so as to adjust the measurement voltage between cathode electrode and anode electrode
Level off to voltage preset value eventually.
Further, it is specially infrared thermometry dress in direct-current arc furnace body upper end setting furnace that the in-furnace temperature, which is adjusted,
It sets and bath temperature in furnace is acquired in real time, in-furnace temperature DCS is preset by collected bath temperature and in-furnace temperature DCS
Bath temperature comparison, in-furnace temperature computing module calculate bath temperature and the preset bath temperature of DCS in furnace in the furnace of acquisition
Difference, Source Current Control signal trigger module generate DC power supply according to the difference that in-furnace temperature computing module is calculated
Voltage control signal is simultaneously sent to DC power supply, after DC power supply device receives voltage control signal, passes through internal actuator tune
The size of whole output electric current, so as to adjust electric arc input energy size, so that bath temperature levels off to preset value in furnace.
Further, it is specially that feed control device is arranged in direct-current arc furnace body feed inlet that the dump temperature, which is adjusted,
Discharge infrared thermometry device is arranged in direct-current arc furnace body side discharge port position and acquires discharge port outflow in real time
Temperature of charge, the temperature of charge and discharge DCS that the discharge port that dump temperature DCS acquires discharge infrared thermometry device flows out are pre-
If temperature of charge comparison, dump temperature computing module calculate the discharge port outflow of acquisition temperature of charge and discharge DCS it is default
Temperature of charge difference, charging control signal trigger module according to the difference that dump temperature computing module is calculated generate into
The charging control signal of material control device is simultaneously sent to feed control device, after feed control device receives charging control signal,
Raw material is adjusted into furnace speed by internal actuator, so that the average time that raw material stops in molten bath is able to extend or shorten,
Achieve the effect that control material of coming out of the stove.
Compared with prior art, the present invention having the following advantages that and effect:
1, the invention avoids the cross influences between different control parameters.In direct current electric arc furnace, the temperature in molten bath is important
Technological parameter.Existing direct current electric arc furnace control mode, DC power supply device will adjust voltage and current simultaneously, and the two
Adjustment can all influence the size of output power of power supply again.And output power of power supply directly affects the temperature in molten bath.Simultaneously as former
Material investment molten bath needs to occur the endothermic reaction, therefore charging rate also will affect bath temperature.Once direct current electric arc furnace molten bath temperature
Degree fluctuates, and often not knowing adjust charging rate, supply voltage or electric current.It is typically necessary operator's root
According to micro-judgment, it is operated manually adjustment.Using the control method of this patent, charging rate, voltage, these three parameters of electric current
It decouples each other, control logic is independent of one another and does not conflict, and can effectively realize automation control, reduces manual intervention；
2, the present invention can make full use of the existing equipment of direct current electric arc furnace and instrument, operating cost low.In direct current electric arc furnace, nothing
It is all commonly used equipment instrument by being that molten bath temperature measuring equipment or anode and cathode survey voltage device.The present invention is normal using these
It uses the output signal of equipment as control signal source, does not need additionally to increase equipment, either for creating direct current electric arc furnace, also
It is the transformation of existing direct current electric arc furnace, will not all brings biggish cost burden.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of the automatic control system of direct current electric arc furnace of the invention.
Fig. 2 is a kind of schematic diagram of the autocontrol method of direct current electric arc furnace of the invention.
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 automatic control system of direct current electric arc furnace of the invention, includes direct-current arc furnace body 1, furnace
Interior infrared thermometry device 2, cathode electrode 3, electrode lifting device 4, in-furnace temperature control sensor 5, power-supply device 6, voltage
Control sensor 7, anode electrode 8, dump temperature control sensor 9, discharge infrared thermometry device 10 and feed control device
11, anode electrode 8 is vertically arranged in 1 upper end of direct-current arc furnace body, and cathode electrode 3 is arranged on electrode lifting device 4 by electricity
Pole lifting device 4 drives the oscilaltion in direct-current arc furnace body, and anode electrode 8 is fixed on 1 lower end of direct-current arc furnace body,
Voltage control sensor 7 and the connection of cathode electrode 3 and anode electrode 8 are for voltage value between measuring electrode, voltage control sensing
Device 7 is connect for sending elevating control signal with electrode lifting device 4, and infrared thermometry device 2 is fixed on direct-current arc in furnace
1 upper end of furnace body, infrared thermometry device 2 is connect with in-furnace temperature control sensor 5 for acquiring bath temperature in furnace in furnace
And it is sent to in-furnace temperature control sensor 5, power-supply device 6 is connect with cathode electrode 3 and anode electrode 8 for supplying to electrode
Electricity, in-furnace temperature control sensor 5 are connect for sending current controling signal with power-supply device 6, and feed control device 11 is arranged
In 1 upper end feed inlet of direct-current arc furnace body, the setting of discharge infrared thermometry device 10 discharges in 1 side of direct-current arc furnace body
Mouth position and discharge infrared thermometry device 10 control sensor 9 with dump temperature and connect the object flowed out for acquiring discharge port
Material temperature degree is simultaneously sent to dump temperature control sensor 9, and dump temperature control sensor 9 is connect with feed control device 11 to be used for
Send charging control signal.
It includes in-furnace temperature DCS, in-furnace temperature computing module and Source Current Control signal that in-furnace temperature, which controls sensor 5,
Trigger module, in-furnace temperature DCS connect the furnace for acquiring infrared thermometry device in furnace with infrared thermometry device in furnace
The preset bath temperature of DCS compares in interior bath temperature and furnace, and in-furnace temperature computing module is connect based on in-furnace temperature DCS
Calculate the difference of the preset bath temperature of DCS in bath temperature and furnace in the furnace of acquisition, Source Current Control signal trigger module with
Difference of the in-furnace temperature computing module connection for being calculated according to in-furnace temperature computing module generates the voltage of DC power supply
Control signal is simultaneously sent to DC power supply.
Voltage control sensor 7 includes voltage measurement module, voltage DCS, voltage operational module, the triggering of elevating control signal
Module, voltage measurement module connect cathode electrode and anode electrode and survey for voltage value between acquisition electrode, voltage DCS and voltage
Amount module connection is for comparing voltage value between the electrode of acquisition and the preset voltage value of voltage DCS, voltage operational mould
The difference of voltage value and preset voltage value, elevating control signal between the electrode of block and voltage DCS connection for calculating acquisition
Trigger module connect the voltage difference for obtaining by voltage operational module with voltage operational module and generates electrode lifting device
Control signal and be sent to electrode lifting device.
It includes dump temperature DCS, dump temperature computing module and charging control signal triggering that dump temperature, which controls sensor 9,
Module, dump temperature DCS connect the discharge port for acquiring discharge infrared thermometry device with discharge infrared thermometry device
The preset temperature of charge of temperature of charge and discharge DCS of outflow compares, and dump temperature computing module connect use with dump temperature DCS
In the temperature of charge for the discharge port outflow for calculating acquisition and the difference of the preset temperature of charge of discharge DCS, charging control signal touching
Hair module connect the difference for being calculated according to dump temperature computing module with dump temperature computing module and generates charging control
The charging control signal of device processed is simultaneously sent to feed control device.
A kind of autocontrol method of direct current electric arc furnace comprising the steps of:
Voltage is adjusted: voltage value between acquisition direct-current arc furnace body inner cathode electrode and anode electrode, and by the voltage of the acquisition
Value is compared with preset voltage value, and calculating difference is simultaneously gone up and down by difference coordination electrode lifting device to adjust voltage value；
Voltage control sensor, voltage control are specially set between the cathode electrode and anode electrode of direct-current arc furnace body
The voltage measurement module of sensor acquires the voltage value between cathode electrode and anode electrode in real time, and voltage DCS is by the electricity of acquisition
Voltage value is compared with the preset voltage value of voltage DCS between pole, and the electricity of acquisition is then calculated by voltage operational module
The difference of voltage value and preset voltage value between pole, the voltage that elevating control signal trigger module is obtained by voltage operational module
Difference generates the control signal of electrode lifting device and is sent to electrode lifting device, after electrode lifting device receives control signal
Lift adjustment is carried out to cathode electrode height by internal actuator, causes arc length between cathode electrode and anode electrode
Variation makes it finally level off to voltage preset value, reaches steady so as to adjust the measurement voltage between cathode electrode and anode electrode
The effect of constant voltage.
In-furnace temperature is adjusted: acquisition in-furnace temperature, and temperature collection and preset temperature are compared, and calculating difference simultaneously passes through difference
The size of current of value control DC power supply；
Specially infrared thermometry device acquires bath temperature in furnace in real time in direct-current arc furnace body upper end setting furnace,
In-furnace temperature DCS compares collected bath temperature and the preset bath temperature of in-furnace temperature DCS, in-furnace temperature computing module
Calculate the difference of bath temperature and the preset bath temperature of DCS in furnace in the furnace of acquisition, Source Current Control signal trigger module
The difference being calculated according to in-furnace temperature computing module generates the voltage control signal of DC power supply and is sent to DC power supply,
After DC power supply device receives voltage control signal, the size of output electric current is adjusted, by internal actuator so as to adjust electric arc
Input energy size achievees the effect that stable furnace temperature so that bath temperature levels off to preset value in furnace.
Dump temperature is adjusted: the temperature of charge of acquisition discharge gate outflow, and temperature collection and preset temperature are compared, and is calculated
Difference simultaneously controls inlet amount by difference.
Specially feed control device is arranged in direct-current arc furnace body feed inlet, and discharge infrared thermometry device is arranged straight
Electric arc furnace body side discharge port position and the in real time temperature of charge of acquisition discharge port outflow are flowed, dump temperature DCS is by discharge
The temperature of charge and the preset temperature of charge of discharge DCS of the discharge port outflow of infrared thermometry device acquisition compare, dump temperature
Computing module calculates the temperature of charge of the discharge port outflow of acquisition and the difference of the preset temperature of charge of discharge DCS, charging control
Signal trigger module controls signal according to the charging that the difference that dump temperature computing module is calculated generates feed control device
And be sent to feed control device, feed control device receive charging control signal after, by internal actuator adjust raw material into
Furnace speed achievees the effect that control material of coming out of the stove so that the average time that raw material stops in molten bath is able to extend or shorten.
The not absolute sequencing of three above step can be carried out simultaneously, can also individually be controlled.By dividing
Analyse direct current electric arc furnace operational process in each control parameter influence factor, by the furnace temperature such as charging rate, voltage, electric current influence because
Element decouples each other.Voltage, electric arc, charging rate etc. are modified using different controling parameters, avoid factors above
Cross influence can be realized the full automation control of direct current electric arc furnace.
The invention avoids the cross influences between different control parameters.In direct current electric arc furnace, the temperature in molten bath is important
Technological parameter.Existing direct current electric arc furnace control mode, DC power supply device will adjust voltage and current simultaneously, and the two
Adjustment can all influence the size of output power of power supply again.And output power of power supply directly affects the temperature in molten bath.Simultaneously as
Raw material investment molten bath needs to occur the endothermic reaction, therefore charging rate also will affect bath temperature.Once direct current electric arc furnace molten bath
Temperature fluctuates, and often not knowing adjust charging rate, supply voltage or electric current.It is typically necessary operator
Rule of thumb judge, is operated manually adjustment.Using the control method of this patent, charging rate, voltage, these three ginsengs of electric current
Number decouples each other, and control logic is independent of one another and does not conflict, and can effectively realize automation control, reduces manual intervention；
The present invention can make full use of the existing equipment of direct current electric arc furnace and instrument, operating cost low.In direct current electric arc furnace, no matter
It is that molten bath temperature measuring equipment or anode and cathode survey voltage device, is all commonly used equipment instrument.The present invention is common using these
The output signal of equipment does not need additionally to increase equipment as control signal source, either for creating direct current electric arc furnace, still
The transformation of existing direct current electric arc furnace will not all bring biggish cost burden.
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 (8)
1. a kind of automatic control system of direct current electric arc furnace, it is characterised in that: surveyed comprising infrared ray in direct-current arc furnace body, furnace
Warm device, cathode electrode, electrode lifting device, in-furnace temperature control sensor, power-supply device, voltage control sensor, anode
Electrode, dump temperature control sensor, discharge infrared thermometry device and feed control device, cathode electrode are vertically arranged in directly
Electric arc furnace body upper end is flowed, anode electrode, which is arranged on electrode lifting device, to be driven by electrode lifting device in direct current electric arc furnace furnace
Internal oscilaltion, voltage control sensor and cathode electrode and anode electrode connection are for voltage value between measuring electrode, electricity
Voltage-controlled sensor processed is connect for sending elevating control signal with electrode lifting device, and infrared thermometry device is fixed on directly in furnace
Electric arc furnace body upper end is flowed, infrared thermometry device is connect with in-furnace temperature control sensor for acquiring molten bath temperature in furnace in furnace
It spends and is sent to in-furnace temperature control sensor, power-supply device is connect for powering to electrode with cathode electrode and anode electrode,
In-furnace temperature control sensor is connect for sending current controling signal with power-supply device, and feed control device is arranged in direct current
Arc furnace body upper end feed inlet, discharge infrared thermometry device are arranged in direct-current arc furnace body side discharge port position and arrange
Material infrared thermometry device connect the temperature of charge for acquiring discharge port outflow with dump temperature control sensor and is sent to
Dump temperature controls sensor, and dump temperature control sensor is connect for sending charging control signal with feed control device.
2. a kind of automatic control system of direct current electric arc furnace described in accordance with the claim 1, it is characterised in that: the in-furnace temperature
Controlling sensor includes in-furnace temperature DCS, in-furnace temperature computing module and Source Current Control signal trigger module, in-furnace temperature
DCS is connect in the furnace for acquiring infrared thermometry device in furnace in bath temperature and furnace with infrared thermometry device in furnace
The preset bath temperature comparison of DCS, in-furnace temperature computing module connect molten bath in the furnace for calculating acquisition with in-furnace temperature DCS
The difference of the preset bath temperature of DCS, Source Current Control signal trigger module and in-furnace temperature computing module in temperature and furnace
The difference for being calculated according to in-furnace temperature computing module is connected to generate the voltage control signal of DC power supply and be sent to
DC power supply.
3. a kind of automatic control system of direct current electric arc furnace described in accordance with the claim 1, it is characterised in that: the voltage control
Sensor includes voltage measurement module, voltage DCS, voltage operational module, elevating control signal trigger module, voltage measurement module
Cathode electrode and anode electrode are connected for voltage value between acquisition electrode, voltage DCS is connect for inciting somebody to action with voltage measurement module
Voltage value is compared with the preset voltage value of voltage DCS between the electrode of acquisition, and voltage operational module connect use with voltage DCS
The difference of voltage value and preset voltage value between the electrode for calculating acquisition, elevating control signal trigger module and voltage operational
Voltage difference of the module connection for being obtained by voltage operational module generates the control signal of electrode lifting device and is sent to
Electrode lifting device.
4. a kind of automatic control system of direct current electric arc furnace described in accordance with the claim 1, it is characterised in that: the dump temperature
Controlling sensor includes dump temperature DCS, dump temperature computing module and charging control signal trigger module, dump temperature DCS
Connect with discharge infrared thermometry device for discharge infrared thermometry device to be acquired discharge port outflow temperature of charge with
The preset temperature of charge comparison of discharge DCS, dump temperature computing module connect the discharging for calculating acquisition with dump temperature DCS
The temperature of charge of mouth outflow and the difference of the preset temperature of charge of discharge DCS, charging control signal trigger module and dump temperature
Difference of the computing module connection for being calculated according to dump temperature computing module generates the charging control of feed control device
Signal is simultaneously sent to feed control device.
5. a kind of autocontrol method of direct current electric arc furnace, it is characterised in that comprise the steps of:
Voltage is adjusted: voltage value between acquisition direct-current arc furnace body inner cathode electrode and anode electrode, and by the voltage of the acquisition
Value is compared with preset voltage value, and calculating difference is simultaneously gone up and down by difference coordination electrode lifting device to adjust voltage value；
In-furnace temperature is adjusted: acquisition in-furnace temperature, and temperature collection and preset temperature are compared, and calculating difference simultaneously passes through difference control
The size of current of DC power supply processed；
Dump temperature is adjusted: the temperature of charge of acquisition discharge gate outflow, and temperature collection and preset temperature is compared, calculating difference
And inlet amount is controlled by difference.
6. according to a kind of autocontrol method of direct current electric arc furnace shown in claim 5, it is characterised in that: the voltage is adjusted
Voltage control sensor, voltage control sensing are specially set between the cathode electrode and anode electrode of direct-current arc furnace body
The voltage measurement module of device acquires the voltage value between cathode electrode and anode electrode in real time, voltage DCS by the electrode of acquisition it
Between voltage value compared with the preset voltage value of voltage DCS, then by voltage operational module calculate acquisition electrode it
Between voltage value and preset voltage value difference, the voltage difference that elevating control signal trigger module is obtained by voltage operational module
It generates the control signal of electrode lifting device and is sent to electrode lifting device, electrode lifting device passes through after receiving control signal
Internal actuator carries out lift adjustment to cathode electrode height, causes the change of arc length between cathode electrode and anode electrode
Change, so as to adjust the measurement voltage between cathode electrode and anode electrode, it is made finally to level off to voltage preset value.
7. according to a kind of autocontrol method of direct current electric arc furnace shown in claim 5, it is characterised in that: the in-furnace temperature
Infrared thermometry device in specially direct-current arc furnace body upper end setting furnace is adjusted to acquire bath temperature in furnace in real time,
In-furnace temperature DCS compares collected bath temperature and the preset bath temperature of in-furnace temperature DCS, in-furnace temperature computing module
Calculate the difference of bath temperature and the preset bath temperature of DCS in furnace in the furnace of acquisition, Source Current Control signal trigger module
The difference being calculated according to in-furnace temperature computing module generates the voltage control signal of DC power supply and is sent to DC power supply,
After DC power supply device receives voltage control signal, the size of output electric current is adjusted, by internal actuator so as to adjust electric arc
Input energy size, so that bath temperature levels off to preset value in furnace.
8. according to a kind of autocontrol method of direct current electric arc furnace shown in claim 5, it is characterised in that: the dump temperature
Adjusting is specially that feed control device is arranged in direct-current arc furnace body feed inlet, and discharge infrared thermometry device is arranged in direct current
Arc furnace body side discharge port position and the temperature of charge for acquiring discharge port outflow in real time, dump temperature DCS are infrared by discharge
The temperature of charge and the preset temperature of charge of discharge DCS of the discharge port outflow of line temperature measuring equipment acquisition compare, dump temperature operation
Module calculates the temperature of charge of the discharge port outflow of acquisition and the difference of the preset temperature of charge of discharge DCS, charging control signal
Trigger module is concurrent according to the charging control signal that the difference that dump temperature computing module is calculated generates feed control device
Feed control device is given, after feed control device receives charging control signal, raw material is adjusted into furnace speed by internal actuator
Degree achievees the effect that control material of coming out of the stove so that the average time that raw material stops in molten bath is able to extend or shorten.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910392463.XA CN110285667B (en) | 2019-05-13 | 2019-05-13 | Automatic control system and control method of direct current electric arc furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910392463.XA CN110285667B (en) | 2019-05-13 | 2019-05-13 | Automatic control system and control method of direct current electric arc furnace |
Publications (2)
| Publication Number | Publication Date |
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| CN110285667A true CN110285667A (en) | 2019-09-27 |
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| CN112229232A (en) * | 2020-10-19 | 2021-01-15 | 江苏天楹等离子体科技有限公司 | Novel plasma melting furnace temperature measuring system |
| CN112521961A (en) * | 2020-12-03 | 2021-03-19 | 长沙修恒信息科技有限公司 | Full-automatic graphite carbonization purification control system |
| CN113959686A (en) * | 2021-09-03 | 2022-01-21 | 中国重型机械研究院股份公司 | Detection device and calibration method for electrode lifting system of LF (ladle furnace) |
| CN114754570A (en) * | 2022-03-23 | 2022-07-15 | 中冶赛迪电气技术有限公司 | Method and device for testing arc starting voltage parameters of direct current electric arc furnace |
| CN114956514A (en) * | 2022-06-14 | 2022-08-30 | 山东红阳高温节能材料股份有限公司 | Ceramic fiber resistance furnace control system, method, equipment and storage medium |
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| CN114956514A (en) * | 2022-06-14 | 2022-08-30 | 山东红阳高温节能材料股份有限公司 | Ceramic fiber resistance furnace control system, method, equipment and storage medium |
| CN114956514B (en) * | 2022-06-14 | 2024-02-02 | 山东红阳高温节能材料股份有限公司 | Ceramic fiber resistance melting furnace control system, method, equipment and storage medium |
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