CN114990272A - Operation method of constant electrode and constant electric field electrode of large submerged arc furnace - Google Patents
Operation method of constant electrode and constant electric field electrode of large submerged arc furnace Download PDFInfo
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- CN114990272A CN114990272A CN202210391281.2A CN202210391281A CN114990272A CN 114990272 A CN114990272 A CN 114990272A CN 202210391281 A CN202210391281 A CN 202210391281A CN 114990272 A CN114990272 A CN 114990272A
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- electrode
- submerged arc
- arc furnace
- constant
- control system
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000005684 electric field Effects 0.000 title claims abstract description 12
- 238000012544 monitoring process Methods 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 238000003723 Smelting Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000011819 refractory material Substances 0.000 abstract description 3
- 238000010079 rubber tapping Methods 0.000 abstract description 3
- 229910001021 Ferroalloy Inorganic materials 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000004070 electrodeposition Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910000604 Ferrochrome Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002003 electrode paste Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B11/00—Making pig-iron other than in blast furnaces
- C21B11/10—Making pig-iron other than in blast furnaces in electric furnaces
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- 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)
- Discharge Heating (AREA)
Abstract
The invention discloses a constant electrode and constant electric field electrode operation method of a large-scale submerged arc furnace in the technical field of a ferroalloy smelting power supply system, which comprises the following steps that an operator controls an electrode automatic control system through an industrial control computer, then controls field equipment according to instructions through the electrode automatic control system, field control information is transmitted to the industrial control computer through a detection system data signal, the industrial control computer automatically corrects through the difference between a monitoring value and a set value, and finally the operator only needs to monitor transmitted information data through the industrial control computer; the hot field distribution in the submerged arc furnace is stabilized, the tapping temperature is stabilized, the furnace condition and the furnace pressure are stabilized, the production technical index is improved, the damage to refractory materials of the submerged arc furnace due to the upward and downward movement of a high-temperature area is avoided, and the burning-through of a furnace hearth is prevented.
Description
Technical Field
The invention relates to the technical field of ferroalloy smelting power supply system, in particular to a constant-electrode constant-electric-field electrode operation method for a large-scale submerged arc furnace.
Background
The submerged arc furnace is designed to be 75MVA, the diameter of an electrode is 1.8 meters, the working stroke of the position of the electrode is 1m, and when high-carbon ferrochrome is normally produced, an operator manually adjusts the position of the electrode to find out proper resistance so as to achieve relative balance of current, thereby realizing stable power; the traditional submerged arc furnace is also supplied with power by constant voltage, the position of an electrode is adjusted, and the current of the electrode is adjusted to achieve the target power of the submerged arc furnace; this mode requires the operator to continually adjust the position of the electrodes to balance the three phase electrode load. Due to the fact that the diameter of the electrode is large, large material collapse is caused to be serious when the position of the electrode is adjusted, furnace conditions are damaged, furnace pressure fluctuation is large, continuous change of the position of the electrode causes large temperature fluctuation of the bottom of a taphole, refractory materials are burnt, the service life of a furnace lining is shortened, and great influences are brought to production technical indexes and safety.
Disclosure of Invention
The invention aims to provide an operation method of a constant electrode and a constant electric field electrode of a large submerged arc furnace, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for operating a constant electrode and a constant electric field electrode of a large submerged arc furnace comprises the following steps,
(1) an operator controls the electrode automatic control system through the industrial personal computer, then controls the field equipment according to instructions through the electrode automatic control system, the field control information is transmitted to the industrial personal computer through a detection system data signal, the industrial personal computer automatically corrects through the difference between a monitoring value and a set value, and finally the operator only needs to monitor the transmitted information data through the industrial personal computer;
(2) the submerged arc furnace power supply system is controlled by an operator through the industrial control computer, the submerged arc furnace transformer automatic voltage regulation control power can be controlled through the submerged arc furnace power supply system, the submerged arc furnace transformer automatic voltage regulation control power data can be transmitted to the industrial control computer and the submerged arc furnace automatic control system through monitoring system data signals, the operator can observe transmitted information data through the industrial control computer, and the signals transmitted to the submerged arc furnace power supply system are convenient for continuous operation.
Further: the electrode automatic control system comprises a computer control system, an electrode band-type brake system, a hydraulic system, a monitoring signal acquisition system, a PLC system and a PCS7 system.
And further: the submerged arc furnace power supply system consists of a high-voltage switch cabinet group, an on-load tap changer, a short network system, a monitoring system (primary and secondary voltage and current monitoring, electrode current monitoring and furnace resistance monitoring) and a computer control system.
Compared with the prior art, the invention has the beneficial effects that:
according to the operation method of the constant electrode and the constant electric field electrode of the large submerged arc furnace, the submerged arc furnace is controlled in a constant electrode position and constant electric field power supply mode, the electrode position is constant, the electric field position is constant, the temperature field is constant, the temperature of a molten pool is constant, a high-temperature area cannot change along with a smelting period, and the stability of the high-temperature area required by a reduction reaction is ensured; the power control adopts an on-load tap changer of a transformer to adjust, the power is stabilized by adjusting the secondary side voltage of the transformer of the submerged arc furnace, the temperature of the slag iron is stable, and the tapping temperature is basically kept above 1550 ℃;
after the position of the electrode is constant, the consumption of the electrode cannot be influenced by other factors to generate a hard break condition, the pressure release quantity is kept stable, and the consumption of the electrode paste is reduced to about 7 kilograms from 10 kilograms of designed ton iron according to the actual production condition and the consumption condition;
the electrode position is constant, the stability of furnace conditions is ensured, the electrode system equipment is changed from dynamic equipment into static equipment, the temperature of the furnace bottom of the furnace cover is effectively controlled, the temperature of the furnace bottom is reduced to be below 900 ℃, the temperature of the furnace cover is reduced to be about 200 ℃, and the operating rate of the submerged arc furnace is improved to be more than 97.6%;
the hot field distribution in the submerged arc furnace is stabilized, the tapping temperature is stabilized, the furnace condition and the furnace pressure are stabilized, the production technical index is improved, the damage to refractory materials of the submerged arc furnace due to the upward and downward movement of a high-temperature area is avoided, and the burning-through of a furnace hearth is prevented.
Drawings
FIG. 1 is a schematic view of the operation process of the electrode automatic control system of the present invention.
FIG. 2 is a schematic diagram of the operation flow of the power supply system of the submerged arc furnace.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
referring to fig. 1-2, the present invention provides a technical solution:
a method for operating a constant electrode and a constant electric field electrode of a large submerged arc furnace comprises the following steps,
(1) an operator controls the electrode automatic control system through the industrial personal computer, then controls the field equipment according to instructions through the electrode automatic control system, the field control information is transmitted to the industrial personal computer through a detection system data signal, the industrial personal computer automatically corrects through the difference between a monitoring value and a set value, and finally the operator only needs to monitor the transmitted information data through the industrial personal computer;
(2) the submerged arc furnace power supply system is controlled by an operator through the industrial control computer, the submerged arc furnace transformer automatic voltage regulation control power can be controlled through the submerged arc furnace power supply system, the submerged arc furnace transformer automatic voltage regulation control power data can be transmitted to the industrial control computer and the submerged arc furnace automatic control system through monitoring system data signals, the operator can observe transmitted information data through the industrial control computer, and the signals transmitted to the submerged arc furnace power supply system are convenient for continuous operation.
Preferably, the electrode automatic control system comprises a computer control system, an electrode band-type brake system, a hydraulic system, a monitoring signal acquisition system, a PLC system and a PCS7 system, wherein the computer control system and the electrode band-type brake system can realize remote automatic control, constant voltage discharge and voltage discharge of an electrode, the monitoring signal acquisition system can realize quick and effective butt joint of control information and a field and accurately control safe operation of the electrode, and through instructions of an operator, analog picture display and information comprehensive data processing on an industrial control computer are transmitted to the electrode hydraulic system, the lifting oil cylinder, the band-type brake device, the voltage discharge oil cylinder, the holding oil cylinder and electric control.
Preferably, the submerged arc furnace power supply system comprises a high-voltage switch cabinet group, an on-load tap changer, a short network system, a monitoring system (primary measurement, secondary measurement for voltage and current, electrode current monitoring and furnace resistance monitoring) and a computer control system, wherein the electrode is operated at a constant position, so that the electrode working end is basically kept consistent but the position is not changed, the resistance at the uniform position in the furnace is continuously changed along with the passing of a smelting period, and the transformer with on-load tap changer needs to be configured for voltage regulation and power supply to ensure the stability of power.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. A constant electrode and constant electric field electrode operation method for a large submerged arc furnace is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
(1) an operator controls the electrode automatic control system through the industrial personal computer, then controls the field equipment according to instructions through the electrode automatic control system, the field control information is transmitted to the industrial personal computer through a detection system data signal, the industrial personal computer automatically corrects through the difference between a monitoring value and a set value, and finally the operator only needs to monitor the transmitted information data through the industrial personal computer;
(2) an operator controls the submerged arc furnace power supply system through the industrial control computer, the submerged arc furnace power supply system comprises a submerged arc furnace automatic control system and a submerged arc furnace manual control system, the submerged arc furnace power supply system can control the submerged arc furnace transformer automatic voltage regulation control power, the submerged arc furnace transformer automatic voltage regulation control power data can be transmitted to the industrial control computer and the submerged arc furnace automatic control system through monitoring system data signals, the operator can observe transmitted information data through the industrial control computer, and the transmitted signals are transmitted to the submerged arc furnace power supply system, so that continuous operation is facilitated.
2. The method for operating the constant electrode and the constant electric field electrode of the large-scale submerged arc furnace according to claim 1, wherein the method comprises the following steps: the electrode automatic control system comprises a computer control system, an electrode band-type brake system, a hydraulic system, a monitoring signal acquisition system, a PLC system and a PCS7 system.
3. The method for operating the constant electrode and the constant electric field electrode of the large-scale submerged arc furnace according to claim 1, wherein the method comprises the following steps: the submerged arc furnace power supply system consists of a high-voltage switch cabinet group, an on-load tap changer, a short network system, a monitoring system (primary and secondary voltage and current monitoring, electrode current monitoring and furnace resistance monitoring) and a computer control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210391281.2A CN114990272A (en) | 2022-04-14 | 2022-04-14 | Operation method of constant electrode and constant electric field electrode of large submerged arc furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210391281.2A CN114990272A (en) | 2022-04-14 | 2022-04-14 | Operation method of constant electrode and constant electric field electrode of large submerged arc furnace |
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|---|---|
| CN114990272A true CN114990272A (en) | 2022-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210391281.2A Pending CN114990272A (en) | 2022-04-14 | 2022-04-14 | Operation method of constant electrode and constant electric field electrode of large submerged arc furnace |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101441035A (en) * | 2009-01-07 | 2009-05-27 | 中冶东方工程技术有限公司 | Automatic control method of ore furnace smelting electric institution |
| RU2008141026A (en) * | 2008-10-15 | 2010-04-20 | Александр Александрович Максимов (RU) | METHOD AND SYSTEM OF AUTOMATIC CONTROL OF ELECTRIC MODE OF ORE-THERMAL FURNACE |
| CN102331193A (en) * | 2011-09-22 | 2012-01-25 | 云南文山斗南锰业股份有限公司 | System and method for controlling electrode of ore-smelting electric furnace |
| CN109737754A (en) * | 2019-03-06 | 2019-05-10 | 重庆大朗冶金新材料有限公司 | Mineral hot furnace automatic operation system |
| CN109757003A (en) * | 2019-03-06 | 2019-05-14 | 重庆大朗冶金新材料有限公司 | Mineral hot furnace autocontrol method |
| CN114199039A (en) * | 2021-12-24 | 2022-03-18 | 鄂尔多斯市君正能源化工有限公司 | Automatic measuring system and method for submerged arc furnace electrode furnace entering depth |
-
2022
- 2022-04-14 CN CN202210391281.2A patent/CN114990272A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2008141026A (en) * | 2008-10-15 | 2010-04-20 | Александр Александрович Максимов (RU) | METHOD AND SYSTEM OF AUTOMATIC CONTROL OF ELECTRIC MODE OF ORE-THERMAL FURNACE |
| CN101441035A (en) * | 2009-01-07 | 2009-05-27 | 中冶东方工程技术有限公司 | Automatic control method of ore furnace smelting electric institution |
| CN102331193A (en) * | 2011-09-22 | 2012-01-25 | 云南文山斗南锰业股份有限公司 | System and method for controlling electrode of ore-smelting electric furnace |
| CN109737754A (en) * | 2019-03-06 | 2019-05-10 | 重庆大朗冶金新材料有限公司 | Mineral hot furnace automatic operation system |
| CN109757003A (en) * | 2019-03-06 | 2019-05-14 | 重庆大朗冶金新材料有限公司 | Mineral hot furnace autocontrol method |
| CN114199039A (en) * | 2021-12-24 | 2022-03-18 | 鄂尔多斯市君正能源化工有限公司 | Automatic measuring system and method for submerged arc furnace electrode furnace entering depth |
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Application publication date: 20220902 |
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