CN106658809A - Automatic pressure release control method of self baking electrode of submerged arc furnace - Google Patents
Automatic pressure release control method of self baking electrode of submerged arc furnace Download PDFInfo
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- CN106658809A CN106658809A CN201611264522.8A CN201611264522A CN106658809A CN 106658809 A CN106658809 A CN 106658809A CN 201611264522 A CN201611264522 A CN 201611264522A CN 106658809 A CN106658809 A CN 106658809A
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- 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
- H05B7/144—Power supplies specially adapted for heating by electric discharge; Automatic control of power, e.g. by positioning of electrodes
- H05B7/148—Automatic control of power
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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)
- Power Engineering (AREA)
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- Plasma & Fusion (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Discharge Heating (AREA)
- Furnace Details (AREA)
Abstract
The invention discloses an automatic pressure release control method of a self baking electrode of a submerged arc furnace. According to the method, after every pressure release action of each phase of self baking electrode is accomplished, an effective active power calculated value, a current heat effect calculated value and an accomplished pressure release time interval calculated value injected to the phase of self baking electrode are calculated again and are continuously monitored, and the three calculated values are compared with respective corresponding set values. When arbitrary two calculated values in the three calculated values exceed the respective corresponding set values, a pressure release control operation of the phase of self baking electrode is automatically started. By adoption of the method disclosed by the invention, full automatic control of the pressure release of the self baking electrode can be realized, the pressure release operation of the electrode of the submerged arc furnace is regulated, the probability of soft electrode breakage and hard electrode breakage accidents caused by improper frequency and opportunity of the pressure release of the electrode due to manual operation is reduced, the furnace halt time is shortened, the smooth operation of the submerged arc furnace is facilitated, and the labor intensity of workers and the production cost are reduced.
Description
Technical field
The present invention relates to mineral hot furnace technical field of automation, more particularly to a kind of mineral hot furnace self-baking electrode presses control automatically
Method.
Background technology
Mineral hot furnace is a kind of special electric arc furnaces of many uses, can producing multiple product, and it is mainly used in metal oxide
The reducing and smelting reaction of ore, because its electric arc is typically buried among furnace charge, the burried arc furnace so mineral hot furnace is otherwise known as.
In mineral hot furnace, the low-voltage and high-current electric energy that electric power system is provided is by stove change, low voltage short net, the input of three-phase self-baking electrode
To in stove, in the electric arc that electrode end is produced, and heat energy is converted electrical energy into, so as to form high temperature reaction zone in body of heater, profit
With electrode arc heat and charging resistance heat, reduction reaction is carried out to metal oxide ore.
Because in smelting process, self-baking electrode is constantly consumed, therefore need to carry out Electrode Fluctuation operation, make self-baking electrode
The part being consumed is able to timely supplement, so that it is guaranteed that welding tip is embedded to the length in furnace charge meets behaviour's furnace technology need
Ask.At this stage, Electrode Fluctuation mechanically or hydraulically equipment automatic linkage sequential control in various types of mineral hot furnaces realize,
But pressing opportunity and to press and (when start the problem that self-baking electrode is pressed) in frequency problem in electrode, it is general or by grasping
Workmanship or furnace superintendent are operated manually according to personal experience.But it is many due to affecting self-baking electrode to press the factor on opportunity, such as
Electrode current, power, power factor, charge level temperature, branch current and electrode paste composition etc., the change of each factor all can affect
Self-baking electrode presses opportunity, and the change of some factors does not have rule to follow.So, each mine heat furnace smelting enterprise Jing
Often can frequently occur because self-baking electrode to press opportunity improper and cause self-baking electrode soft disconnected or hard disconnected production accident occur.One
There is soft disconnected or accident of breaking firmly in denier self-baking electrode, just must blowing out process, resume production after being disposed when being also required to certain
Between, progressively to return to the normal working of a furnace.Therefore mineral hot furnace self-baking electrode presses control to furnace condition anterograde, reduction furnace outage time, carries
High mineral hot furnace yield tool is of great significance.
The content of the invention
The technical problem to be solved in the present invention is for defect of the prior art, there is provided a kind of mineral hot furnace self-baking electrode
Automatically control method is pressed.
The technical solution adopted for the present invention to solve the technical problems is：A kind of mineral hot furnace self-baking electrode presses control automatically
Method, comprises the following steps：
1) after the completion of every phase self-baking electrode presses every time action, effective active power of the phase self-baking electrode is calculated
Value, electrode current fuel factor calculated value, complete to press the clearing of time interval calculated value；
2) effective active power calculating value, the calculating of electrode current fuel factor being injected in the phase self-baking electrode is recalculated
Value, complete to press time interval calculated value；
3) by effective active power calculating value, electrode current fuel factor calculated value, complete to press time interval calculated value
Continuously compared with each self-corresponding given threshold；
4) when effective active power calculating value, electrode current fuel factor calculated value, complete to press time interval calculated value
In any two calculated values when exceeding each self-corresponding given threshold, the automatic phase self-baking electrode presses operation.
By such scheme, effective active power calculating value is pressed according to molten bath voltage measuring value and electrode current measured value
Following formula are calculated：
P (t) is effective active power calculating value of current sample time in formula, and P (t-1) is the effective of previous sampling instant
Active power calculating value, UBathFor molten bath voltage measuring value, IElFor electrode current measured value.
By such scheme, the electrode current fuel factor calculated value foundation electrode current measured value is according to the following formula：
H (t) is the electrode current fuel factor calculated value of current sample time in formula, and H (t-1) is the electricity of previous sampling instant
Electrode current fuel factor calculated value, IElFor electrode current measured value.
It is described to complete to press time interval calculated value by such scheme, adjust setting value and reality according to rise fall of electrodes
The deviation situation of value is according to the following formula：
T (t) presses time interval calculated value for current sample time in formula, and T (t-1) is pressing for previous sampling instant
Time interval calculated value, SP is the setting value that rise fall of electrodes is adjusted, and PV is the actual value that rise fall of electrodes is adjusted, and δ is rise fall of electrodes
The tolerance threshold value of regulation.
By such scheme, effective active power calculating value, electrode current fuel factor calculated value, complete to press the time
The calculating sampling period of interval calculation value is 1 second.
By such scheme, for the three-phase electrode of mineral hot furnace, control method is pressed using identical self-baking electrode automatically,
Electrode presses control automatically separately to be realized to three-phase self-baking electrode.
By such scheme, the mineral hot furnace type of furnace includes the various ore deposits heat including furnace of calcium carbide, Yellow phosphorus furnace, all kinds of ferro-alloy furnaces
The stove type of furnace.
The beneficial effect comprise that：
1. the inventive method from effective active power, electrode current fuel factor, press three dimensions of interval time and adjust and examine
The roasting situation of self-baking electrode is examined, so that it is determined that pressing for self-baking electrode and presses frequency at opportunity, realizes what self-baking electrode was pressed
Full automatic working, specification Electrode Fluctuation operation, alleviates the labour intensity of operative employee.
2. present invention decreases self-baking electrode because press opportunity and press frequency it is improper the soft disconnected and electrode of the electrode that causes
The probability that hard disconnected accident occurs, reduces furnace outage time, reduces production accident processing cost.
3. control method of the present invention can be can be not only used on polytype control hardware platform by software programming realization
Newly-built mineral hot furnace, it can also be used to the upgrading of the existing mineral hot furnace of operation, applicability and realizability it is strong.
Description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the flow chart that the mineral hot furnace self-baking electrode of the embodiment of the present invention presses control method automatically.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that specific embodiment described herein is not used to limit only to explain the present invention
The fixed present invention.
As shown in figure 1, a kind of mineral hot furnace self-baking electrode presses control method automatically, comprise the following steps：
(1) after the completion of every phase self-baking electrode last time presses action, by effective active power calculating value P of the phase electrode
T () and effective active power calculating value reach setting value flag bit Flag1, electrode current fuel factor calculated value H (t) and electrode electricity
Stream fuel factor calculated value reaches setting value flag bit Flag2, completes to press time interval calculated value T (t) and complete to press
Time interval calculated value reaches setting value flag bit Flag3 clearings；
(2) calculate according to correspondence formula again be injected into effective active power calculating value P (t) in the phase self-baking electrode,
Electrode current fuel factor calculated value H (t), complete to press time interval calculated value T (t)；
(3) by effective active power calculating value P (t), electrode current fuel factor calculated value H (t), complete to press between the time
Continuously compared with each self-corresponding setting value every calculated value T (t).If a certain calculated value, will more than its correspondence setting value
Corresponding mark position 1, otherwise continues refreshing and calculates and compare.
Specifically, when effective active power calculating value P (t) is more than its setting value, flag bit Flag1 is put into 1；Work as electricity
When electrode current fuel factor calculated value H (t) is more than its setting value, flag bit Flag2 is put into 1；When completing to press time interval meter
When calculation value T (t) is more than its setting value, flag bit Flag3 is put into 1.
(4) when effective active power calculating value, electrode current fuel factor calculated value, complete to press time interval calculated value
In any two calculated values when exceeding each self-corresponding setting value, the automatic phase self-baking electrode presses operation.
Specifically, i.e., when tri- flag bit sums of flag bit Flag1, Flag2, Flag3 are more than or equal to 2, you can open
That moves the phase self-baking electrode presses operation.
Wherein, effective active power calculating value foundation molten bath voltage measuring value and electrode current measured value are based on following formula
Calculate：
P (t) is effective active power calculating value of current sample time in formula, and P (t-1) is the effective of previous sampling instant
Active power calculating value, UBathFor molten bath voltage measuring value, (unit is V, can be by measuring electrode brasses relative to furnace shell bottom
Voltage obtain), IElFor electrode current measured value, (unit is kA, can be by installed in the short online Luo Kefu of ore furnace secondary
This lubber ring becomes the current transformer measurement on winding and obtains installed in stove change first side winding/string).
Electrode current fuel factor calculated value foundation electrode current measured value is according to the following formula：
H (t) is the electrode current fuel factor calculated value of current sample time in formula, and H (t-1) is the electricity of previous sampling instant
Electrode current fuel factor calculated value, IElFor electrode current measured value, (unit is kA, can be by short online installed in ore furnace secondary
Rogowski coil becomes the current transformer measurement on winding and obtains installed in stove change first side winding/string).
Complete to press time interval calculated value, according to the setting value and the deviation size feelings of actual value of rise fall of electrodes regulation
Condition is according to the following formula：
T (t) presses time interval calculated value for current sample time in formula, and T (t-1) is pressing for previous sampling instant
Time interval calculated value, SP is the setting value that rise fall of electrodes is adjusted, and PV is the actual value that rise fall of electrodes is adjusted, and δ is rise fall of electrodes
The tolerance threshold value of regulation.For the mineral hot furnace using current regulation mode, SP is electrode current setting value, and PV is electrode electricity
Stream actual value, δ is that electrode current adjusts tolerance threshold value (typically taking 1kA)；For the mineral hot furnace using impedance shaping modes,
SP is electrode impedance setting value, and PV is electrode impedance actual value, and δ is that electrode impedance regulation tolerance threshold value (typically takes 0.1m
Ω)
Effective active power calculating value, electrode current fuel factor calculated value, complete to press time interval calculated value
The calculating sampling period be 1 second, i.e., every 1 second, refresh and calculate above three parameter once.
For the three-phase electrode of mineral hot furnace, control method is pressed using identical self-baking electrode automatically, to three-phase self-baking
Electrode separately implement electrode press automatically control, i.e. three-phase self-baking electrode press automatically control it is separate, mutually not
Interference effect.
The applicable mineral hot furnace type of furnace of the present invention include furnace of calcium carbide, Yellow phosphorus furnace, various types of ferro-alloy furnaces (as Fesi Furnace,
Ferromanganese stove, ferrochrome stove, silicomanganese stove) etc..
Self-baking electrode of the present invention presses control method automatically can be by various in PLC, DCS, industrial computer, single-chip microcomputer, DSP etc.
Automatically control and realized by software programming on hardware platform.In the present embodiment, self-baking electrode presses control method in west automatically
By the SCL lingware programming realizations in Step7 programming softwares in the sub- S7-400 series of PLC of door.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or be converted,
And all these modifications and variations should all belong to the protection domain of claims of the present invention.
Claims (9)
1. a kind of mineral hot furnace self-baking electrode presses control method automatically, it is characterised in that the method comprises the steps：
1) after the completion of every phase self-baking electrode presses every time action, by effective active power calculating value, the electricity of the phase self-baking electrode
Electrode current fuel factor calculated value, complete to press the clearing of time interval calculated value；
2) recalculate be injected in the phase self-baking electrode effective active power calculating value, electrode current fuel factor calculated value,
Complete to press time interval calculated value；
3) by effective active power calculating value, electrode current fuel factor calculated value, complete to press time interval calculated value with it is each
Self-corresponding given threshold is continuously compared；
4) when effective active power calculating value, electrode current fuel factor calculated value, complete to press in time interval calculated value
When any two calculated values exceed each self-corresponding given threshold, the automatic phase self-baking electrode presses operation.
2. mineral hot furnace self-baking electrode according to claim 1 presses control method automatically, it is characterised in that described effectively to have
Work(power calculation value foundation molten bath voltage measuring value and electrode current measured value are according to the following formula：
P (t) is effective active power calculating value of current sample time in formula, and P (t-1) is the effective active of previous sampling instant
Power calculation value, UBathFor molten bath voltage measuring value, IElFor electrode current measured value.
3. mineral hot furnace self-baking electrode according to claim 1 presses control method automatically, it is characterised in that the electrode electricity
Stream fuel factor calculated value foundation electrode current measured value is according to the following formula：
H (t) is the electrode current fuel factor calculated value of current sample time in formula, and H (t-1) is the electrode electricity of previous sampling instant
Stream fuel factor calculated value, IElFor electrode current measured value.
4. mineral hot furnace self-baking electrode according to claim 1 presses control method automatically, it is characterised in that described to complete
Press the deviation situation of time interval calculated value, foundation rise fall of electrodes regulation setting value and actual value according to the following formula：
In formula T (t) presses time interval calculated value for current sample time, and T (t-1) is that previous sampling instant presses the time
Interval calculation value, SP is the setting value that rise fall of electrodes is adjusted, and PV is the actual value that rise fall of electrodes is adjusted, and δ is rise fall of electrodes regulation
Tolerance threshold value.
5. mineral hot furnace self-baking electrode according to claim 1 presses control method automatically, it is characterised in that the three of mineral hot furnace
Phase electrode presses control method automatically using identical self-baking electrode, and three-phase electrode is independently realized to press control automatically
System.
6. mineral hot furnace self-baking electrode according to claim 1 presses control method automatically, it is characterised in that the mineral hot furnace
The type of furnace includes the various mineral hot furnace type of furnaces including furnace of calcium carbide, Yellow phosphorus furnace, all kinds of ferro-alloy furnaces.
7. mineral hot furnace self-baking electrode according to claim 2 presses control method automatically, it is characterised in that described effectively to have
The calculating sampling period of work(power calculation value is 1 second.
8. mineral hot furnace self-baking electrode according to claim 3 presses control method automatically, it is characterised in that the electrode electricity
The calculating sampling period of stream fuel factor calculated value is 1 second.
9. mineral hot furnace self-baking electrode according to claim 4 presses control method automatically, it is characterised in that described to complete
The calculating sampling period for pressing time interval calculated value is 1 second.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611264522.8A CN106658809B (en) | 2016-12-30 | 2016-12-30 | Automatic pressure discharge control method for self-baking electrode of submerged arc furnace |
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| CN201611264522.8A CN106658809B (en) | 2016-12-30 | 2016-12-30 | Automatic pressure discharge control method for self-baking electrode of submerged arc furnace |
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| CN106658809A true CN106658809A (en) | 2017-05-10 |
| CN106658809B CN106658809B (en) | 2020-06-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114485198A (en) * | 2022-02-18 | 2022-05-13 | 内蒙古多蒙德冶金化工集团有限公司 | Low-energy-consumption production operation method of closed calcium carbide furnace |
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2016
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Patent Citations (3)
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| CN102056359A (en) * | 2010-12-24 | 2011-05-11 | 登封电厂集团铝合金有限公司 | Large submerged arc furnace combined self-baking electrode device capable of removing housing and use method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114485198A (en) * | 2022-02-18 | 2022-05-13 | 内蒙古多蒙德冶金化工集团有限公司 | Low-energy-consumption production operation method of closed calcium carbide furnace |
| CN114485198B (en) * | 2022-02-18 | 2023-10-10 | 内蒙古多蒙德冶金化工集团有限公司 | Low-energy production operation method of airtight calcium carbide furnace |
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