CN109757003A - Mineral hot furnace autocontrol method - Google Patents
Mineral hot furnace autocontrol method Download PDFInfo
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- CN109757003A CN109757003A CN201910166645.5A CN201910166645A CN109757003A CN 109757003 A CN109757003 A CN 109757003A CN 201910166645 A CN201910166645 A CN 201910166645A CN 109757003 A CN109757003 A CN 109757003A
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The present invention discloses a kind of mineral hot furnace autocontrol method, comprising steps of the control parameter of default each electric information of mineral hot furnace；Whether the operating parameter for monitoring each electric information of mineral hot furnace meets the automatic adjustment that preset condition carries out rise fall of electrodes, Electrode Fluctuation and transformer gear according to each operating parameter.Solve the problems, such as that mineral hot furnace power is low, energy consumption is high using mineral hot furnace autocontrol method of the present invention.
Description
Technical field
The present invention relates to automation control areas, and in particular to a kind of mineral hot furnace autocontrol method.
Background technique
At present mineral hot furnace autocontrol method be computer and manual operation, manual control current fluctuation, manually press electrode,
Coordination electrode is up and down, the fluctuation of the artificial judgment working of a furnace, and using artificial judgment and operation, there are following deficiencies:
1, it is be easy to cause erroneous judgement, because artificial with factors such as strong personal thinking, subjective judgement, moods.
2, manually data are compiled, discriminatory analysis has omission, not comprehensive enough to big data analysis.
If 3, manual operation is not in time, situations such as leaking operation or maloperation is easily caused.
4, often in order to possess function electrode can only be entered according to secondary current and active power control furnace when existing control furnace
Expect more and more shallow.After electrode shoals, want to insert down at electrode, must just reduce power, staff but be reluctant under power
Drop is too many, as a result causes not going under electrode is total.Does staff, which does not know, propose electrode or decompression when electric current becomes larger? in electricity
Does is rheology hour lower electrode or boosting? therefore the existing working of a furnace is unstable, low efficiency, energy consumption are high.
Summary of the invention
The invention aims to solve the problems, such as that mineral hot furnace power is low, energy consumption is high, a kind of mineral hot furnace automatic control is provided
Method.
According to one aspect of the present invention, a kind of mineral hot furnace autocontrol method is provided, comprising steps of
The control parameter of default each electric information of mineral hot furnace；
The operating parameter for monitoring each electric information of mineral hot furnace carries out electrode according to whether each operating parameter meets preset condition
The automatic adjustment of lifting, Electrode Fluctuation and transformer gear.
Optionally, mineral hot furnace autocontrol method, each electric information of mineral hot furnace include: electrode pan feeding depth, electrode
Mean depth, arc voltage, electrode current, active power, electrode length and press the time.
Optionally, mineral hot furnace autocontrol method, it is described to carry out electrode according to whether each operating parameter meets preset condition
The automatic adjustment of lifting, Electrode Fluctuation and transformer gear, before: judging whether three-phase electrode electric current balances, if three-phase electrode
Current balance type then carries out rise fall of electrodes, Electrode Fluctuation and transformer gear according to whether each operating parameter meets preset condition
Automatic adjustment；Otherwise three-phase electrode electric current is leveled.
Optionally, mineral hot furnace autocontrol method, according to each operating parameter whether meet preset condition carry out rise fall of electrodes,
The automatic adjustment of Electrode Fluctuation and transformer gear, comprising: according to electrode mean depth, arc voltage and the electrode current of monitoring
Operating parameter whether within the scope of preset control parameters carry out rise fall of electrodes adjusting；According to the active power of monitoring and electrode electricity
Whether the operating parameter of stream carries out transformer gear adjusting within the scope of preset control parameters；According to the electrode length and pressure of monitoring
Whether the operating parameter for putting the time carries out Electrode Fluctuation adjusting within the scope of preset control parameters.
Optionally, mineral hot furnace autocontrol method, specifically: judging whether the electrode mean depth of monitoring exceeds default control
Parameter processed, if electrode mean depth exceeds preset control parameters, electrode always rises or always drops；Otherwise, judge the arc voltage of monitoring
Whether it is not less than preset control parameters and whether electrode current is greater than preset control parameters, if so, electrode pan feeding depth is not less than
Electrode always rises when the control parameter upper limit；Otherwise, judge whether the arc voltage of monitoring is not more than preset control parameters and electrode electricity
Whether stream is less than preset control parameters, if so, electrode always drops when electrode pan feeding depth is not more than control parameter lower limit；Otherwise, sentence
Whether the active power of disconnected monitoring is greater than control parameter upper limit value, if transformer reduces by one grade of voltage；Otherwise, judge monitoring
Whether active power is less than control parameter lower limit value and whether electrode current is less than preset control parameters, if transformer increases one
Shelves voltage；Otherwise, judging whether the electrode length of monitoring is greater than preset control parameters and whether pressed away from last time is more than most in short-term
Between, if so, single-phase press；Otherwise judge whether the electrode length of monitoring is greater than preset control parameters and whether pressed away from last time super
Maximum duration is crossed, if so, single-phase press.
Optionally, mineral hot furnace autocontrol method, the leveling three-phase electrode electric current use band facies principle to level three-phase electricity
Stream.
Optionally, mineral hot furnace autocontrol method, further include to the operating parameter of each electric information of the mineral hot furnace of monitoring into
Row modeling operation, updates control parameter.
Compared with prior art, effect of the invention is as follows: the method for the present invention can be realized electrode automatic lifting, electrode certainly
Dynamic pressure puts, the automatic adjustment of transformer gear.Solve the problems, such as that the unstable working of a furnace, low efficiency, energy consumption are high.Forefathers' industry control therewith
Furnace mode is compared, and under the conditions of the same furnace charge working of a furnace, electric furnace operation is more stable, and unit power consumption decline, output increased realizes increasing
Produce the purpose of economize on electricity.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can
It is clearer and more comprehensible, the followings are specific embodiments of the present invention.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is the flow chart of the method for the present invention；
Fig. 2 is the flow chart of the specific embodiment of the invention；
Fig. 3 is the functional block diagram of present system.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, the embodiment of the present invention provides a kind of mineral hot furnace autocontrol method, comprising steps of
Step S1: the control parameter of default each electric information of mineral hot furnace；
In the embodiment of the present invention, each electric information of mineral hot furnace includes the communication information of all instrument, mineral hot furnace design
Parameter information and furnace transformer information, such as: electrode pan feeding depth, arc voltage, electrode current, has electrode mean depth
Function power, electrode length press time, resistivity, consumption of electrode, electrode displacement, furnace change overload protection multiple and Discrete control
Setting etc..The control parameter of each electric information of mineral hot furnace includes: the active power upper limit, active power lower limit, electrode current permission
Value, longest press the time, most short press time, the shallow position limit value of electrode, electrode depth position limit value, electrode displacement uplink limit value, electrode
Displacement downlink limit value, electrode current current density, arc voltage controlling value, consumption of electrode, furnace become overload protection multiple, press one
The secondary amount of moving down, electrode length controlling value, measuring resistance rate, standard come out of the stove electricity and Discrete control setting.According to the different working of a furnaces
Different control parameters is set.Realize that mineral hot furnace automatically controls, most critical technology is the accurate measurement of electrode pan feeding depth.
Electrode pan feeding depth of the present invention uses furnace external magnetic field method, measures electrode work Shi Lu by electromagnetic sensor
The magnetic field signal generated in vitro.Because high current when electrode works can generate magnetic field outside furnace body, electrode underthrust depth is not
Together, magnetic field strength can generate variation, measure magnetic field signal by electromagnetic sensor, obtain electrode in mineral hot furnace using magnetic field
Position.Electrode pan feeding depth is the Operational Data Analysis through a period of time, and related with smelting cycle, therefore no matter
Automatic or manual operation, it is necessary to stifled eye.Other control parameters
Further, the electrode pan feeding depth also carries out electrode pan feeding depth school by adjusting benchmark magnetoimpedance coefficient
It tests.When system just puts into operation, needs to verify electrode pan feeding depth, reach show value and match with actual value, such as
After fruit runs a period of time, show value and actual value still have deviation, improve the accuracy of the information of electrode pan feeding depth.
Electrode pan feeding depth and the setting of active power bound are the key that control furnace success or not, electrode pan feeding depth and are had
The preset condition of function power bound is:
1. active setting value is big, electrode work is shallow, low, the electrode work depth of active setting；
Is electrode also big 2. electrode is to pushing up?
If furnace temperature is not high, upper depth limit value is changed a little bit smaller, electrode is allowed to be depressured through continuing to mention,
If furnace temperature is more higher than normal, illustrates that electrode is excessively shallow, load down can only be depressured；
3. under electrode slowly, wait electric currents small to can following electrode, but spent the lower electrode stage, at this time if electrode not
Median is crossed, electrode can be terminated electricity increasing, under allowing electrode to continue.
4. obtaining deeply under electrode, be conducive to thicken the solids bed of material, reduce boiler face heat dissipation, but obtains too deep power under electrode and decline
Too much, yield can be reduced, therefore the reasonable electrode bound of setting is very crucial, it is good can to find out the working of a furnace from historical data
Stage corresponding electrode working range, with this as the setting value of electrode pan feeding depth.
5. if electric current is enough small, it is active also enough big, so that it may to strive for that electrode is inserted down more, even if electrode arrives down down at this time
Limit, can also tune up lower limit pan feeding depth.
6. not being to say that electrode must be mentioned by mentioning the electrode stage, the lower electrode stage cannot mention electrode, and mentioning electrode is because electric current is super
, if do not mention can only be depressured reduce it is active.The second half section of smelting must make electrode work in deep position at least in setting bound
Medium line is hereinafter, because of second half section furnace temperature highest, the insulating layer needed is also thicker.Ensure that bath temperature is enough high critically important, extends
Tapping duration can be improved furnace temperature, and electricity is come out of the stove in adjustment or the time of coming out of the stove should make each furnace ladle substantially full.For example, iron
Water packet can fill 32 tons, if a furnace just fills 29 tons out, the electricity that next furnace can increase by 2 tons is come out of the stove.
It is automatic to be depressured 7. practical active power is more than the upper limit active setting value；Active power is lower than the active setting of lower limit
When value, while when electrode current is less than 0.98 times of permissible value, can just it boost.
8., since molten bath has moved up, active bound need to be turned down when confirming that electrode is partially shallow, electrode bound gradually under
Adjust, should not a step it is too big, when following electrode can under to subject to baseline, if this furnace can arrive baseline, next furnace again adds lower limit
It is big by 20, gradually electrode is supported down.This process may a couple of days, after under electrode to suitable position, then it is active gradually
Tune up, the value tuned up every time be subject to electrode mean depth can under to baseline.Such as smelting the later period is easy to appear and turns over slag, then illustrates electricity
It is extremely too deep, at this time only need to be being mentioned on electrode pan feeding depth limit, other parameters do not have to change.
9. gap is 100mm between the bound of the electrode pan feeding depth.
10. it is when observation furnace temperature is higher, the unified tune of electrode pan feeding depth limit value is deep, on the contrary tune is shallow.
The control parameter of the electrode current is not surpassed with water temperature for foundation, and in no low-voltage compensation, electrode current model
The setting for enclosing value is also contemplated that furnace and becomes secondary and primary current not excess load.
Electrode displacement is measured by bracing wire meter counter, and signal is shown on computers after analog-to-digital conversion, but is shown
Data are often and actual displacement has deviation, can be displaced show value and actual match by correcting electrode at this time.
Step S2: whether the operating parameter of monitoring each electric information of mineral hot furnace meets preset condition according to each operating parameter
Carry out the automatic adjustment of rise fall of electrodes, Electrode Fluctuation and transformer gear.
The present invention carries out rise fall of electrodes, Electrode Fluctuation and transformation according to whether each operating parameter meets preset condition described
Before the automatic adjustment of device gear: judging whether three-phase electrode electric current balances, if three-phase electrode current balance type, according to each operation
Whether parameter meets the automatic adjustment that preset condition carries out rise fall of electrodes, Electrode Fluctuation and transformer gear；Otherwise three-phase is leveled
Electrode current.If three-phase electrode current imbalance, and current three-phase deviation is greater than 3%, levels electric current using band facies principle；Leveling
In the process, most deep most shallow electrode pan feeding depth difference is no more than 130mm, makes three-phase electrode current balance type.
If there is electric current not balancing, if most deep electrode and most shallow electrode have differed by more than 130mm, if it is, looking into
Once electrode displacement is that a certain phase is continuously moved too much, if it is, maintaining, if it is not, then being verified by electrode most
Deep electrode subtracts 30, and most shallow electrode adds 30.
The present invention carries out rise fall of electrodes, Electrode Fluctuation and transformer gear according to whether each operating parameter meets preset condition
Automatic adjustment, comprising: according to the operating parameter of the electrode mean depth of monitoring, arc voltage and electrode current whether default
Rise fall of electrodes adjusting is carried out within the scope of control parameter；According to the active power of monitoring and the operating parameter of electrode current whether pre-
If carrying out transformer gear adjusting within the scope of control parameter；According to the electrode length of monitoring and press the time operating parameter whether
Electrode Fluctuation adjusting is carried out within the scope of preset control parameters.
It is shown in Figure 2, the specific embodiment of the invention: judge whether the electrode mean depth of monitoring exceeds default control ginseng
Number, if electrode mean depth exceeds preset control parameters, electrode always rises or always drops；Otherwise, whether judge the arc voltage monitored
Whether it is greater than preset control parameters not less than preset control parameters and electrode current, if so, electrode pan feeding depth is not less than control
Electrode always rises when parameter upper limit；Otherwise, judge whether the arc voltage of monitoring is not more than preset control parameters and electrode current is
It is no to be less than preset control parameters, if so, electrode always drops when electrode pan feeding depth is not more than control parameter lower limit；Otherwise, judge to supervise
Whether the active power of survey is greater than control parameter upper limit value, if transformer reduces by one grade of voltage；Otherwise, judge the active of monitoring
Whether power is less than control parameter lower limit value and whether electrode current is less than preset control parameters, if transformer increases one grade of electricity
Pressure；Otherwise, judge whether the electrode length of monitoring is greater than preset control parameters and whether pressed away from last time more than the shortest time, if
It is, it is single-phase to press；Otherwise judging whether the electrode length of monitoring is greater than preset control parameters and whether pressed away from last time is more than most
For a long time, if so, single-phase press.
The principle of electrode automatic adjustment are as follows:
Preferential leveling three-phase current, when the electrode current of a maximum phase is greater than permissible value, three-phase synchronous mentions electrode, mentions three
When phase average depth is less than upper depth limit value, electrode is no longer mentioned, at this time if electrode current is also super, three-phase synchronous decompression；
When electrode current is less than 0.97 times of permissible value, electrode under three-phase synchronous is lower to arrive no longer lower electricity when depth limit value
Pole, the at this time also small then three-phase synchronous boosting of electric current.
During current leveling, extreme electrode pan feeding depth and minimum electrode pan feeding depth offset are not more than 120mm, such as
The most shallow electrode pan feeding depth of a certain electrode is 1100, if it is determined that a most deep phase needs underthrust to level electric current, but maximum pan feeding is
It, at this time cannot underthrust more than 1200mm.
The principle of control method of the present invention:
1. electric current is big, electrode is mentioned, when mentioning electrode mean depth less than upper limit value, electric current is also then depressured greatly；
2. electric current is small, lower electrode, lower to be greater than lower limit to electrode mean depth, electric current is also small, boosts；
3. dividing five stage controls, each stage starts can be according to staff's sets itself, if work with the time terminated
Think to start in advance as personnel, then starting point electricity is reduced；Think late end, then end point electricity is increased.
4. it is active when being greater than upper limit value, it can be depressured, it is so high to be not desired to power, then active upper limit value is reduced, otherwise increased.
5. it is active when being less than lower limit value, it is preferential to boost if electric current allows.
6. in the lower electrode stage, if under electrode less than medium line (such as the upper limit be 1100mm, lower limit 1400mm, then
Median is 1250mm), operating system can descend electrode by force, if electric current can be depressured after having surpassed, this function is to guarantee
Electrode must descend certain depth.
7. electrode overall length is greater than the set value, pressed by maximum duration interval；When electrode overall length is less than setting value, by most short
Time presses.
Another embodiment of the present invention, mineral hot furnace autocontrol method further include to each electric information of the mineral hot furnace of monitoring
Operating parameter carries out modeling operation, updates control parameter.The control of each electric information of preset mineral hot furnace is updated by this method
Parameter, preset condition further save efficiency to improve control efficiency using updated control parameter.
In order to further explain operation of the present invention method, below by taking silicomanganese furnace automates control furnace as an example:
The control rule of the control furnace:
1. becoming larger in refining initial stage electric current, the later period gradually becomes smaller again, every furnace cyclically-varying；
2. corresponding above-mentioned variation uses three kinds of control furnace methods, as shown in the table:
3. electrode pan feeding depth and active and production target relationship:
1. electrode is inserted deep, boiler face heat dissipation is few, and furnace charge absorbs gasified metal and flue dust is more, advantageously reduces ore deposit consumption and electricity
Consumption is conducive to environmental protection, but active power can reduce, and yield is impacted.
2. electrode is inserted shallowly, active power is high, and yield is high, but boiler face heat dissipation is more, and furnace charge absorbs gasified metal and flue dust is few,
Ore deposit consumption is high and power consumption is also high.Therefore it needs to look for a best control furnace parameters between active, yield, unit consumption.
3. electrode shoals, the active of application must be reduced；So active when electrode is to the upper limit want lower.
4. electrode deepens, the active of application can just be increased；So active to maximum when electrode is to lower limit.
Shown in Figure 3, mineral hot furnace autocontrol method of the present invention is run in mineral hot furnace automatic control system, mineral hot furnace
Automatic control system includes data collection system 1, data processing system 2 and automatic control system 3,
The data collection system 1, for monitoring the operating parameter of each electric information of mineral hot furnace and being sent to the data
Processing unit.Such as: acquisition electrode pan feeding depth, electrode current operating parameter.
The data processing system 2 is acquired for presetting the control parameter of each electric information of mineral hot furnace using the data
The operation data of system acquisition, the value range of the control parameter of setting and furnace transformer parameter carry out modeling operation and obtain institute
The control furnace parameters needed, and output control switch amount gives the automatic control system.
Whether the automatic control system 3, each operating parameter for the data processing system based on the received meet
Preset condition carries out the automatic adjustment of rise fall of electrodes, Electrode Fluctuation and transformer gear.
The yield of each furnace of typing in an operating system, so that system carries out the energy consumption analysis of each furnace.If running
Period can modify to yield and the duration of heat when forgetting to input single furnace output or incorrect input, and modification is completed
Afterwards, mineral hot furnace automatic control system can re-start data operation automatically, obtain new single furnace energy consumption data.
When restarting mineral hot furnace automatic control system in operation, the electrode pan feeding depth before shutting down procedure please be record, after restarting
It is verified by this depth, or by actual measurement depth verification, while inputting this furnace electricity consumption.
When not having to be again started up mineral hot furnace automatic control system for a long time, first at lower operation one day manually, during which do
Block up eye on time, after one day electrode pan feeding depth can gradually automatic Verification to compared with exact value.
Claims (7)
1. a kind of mineral hot furnace autocontrol method, it is characterised in that: comprising steps of
The control parameter of default each electric information of mineral hot furnace；
The operating parameter for monitoring each electric information of mineral hot furnace carries out electrode liter according to whether each operating parameter meets preset condition
The automatic adjustment of drop, Electrode Fluctuation and transformer gear.
2. mineral hot furnace autocontrol method as described in claim 1, it is characterised in that: each electric information packet of mineral hot furnace
It includes: electrode pan feeding depth, electrode mean depth, arc voltage, electrode current, active power, electrode length and pressing the time.
3. mineral hot furnace autocontrol method as described in claim 1, it is characterised in that: described whether full according to each operating parameter
Sufficient preset condition carries out the automatic adjustment of rise fall of electrodes, Electrode Fluctuation and transformer gear, before: judging that three-phase electrode electric current is
No balance carries out rise fall of electrodes, electrode pressure according to whether each operating parameter meets preset condition if three-phase electrode current balance type
It puts and the automatic adjustment of transformer gear；Otherwise three-phase electrode electric current is leveled.
4. mineral hot furnace autocontrol method as claimed in claim 1 or 2, it is characterised in that: whether full according to each operating parameter
Sufficient preset condition carries out the automatic adjustment of rise fall of electrodes, Electrode Fluctuation and transformer gear, comprising: average according to the electrode of monitoring
Whether the operating parameter of depth, arc voltage and electrode current carries out rise fall of electrodes adjusting within the scope of preset control parameters；Root
Whether transformer gear tune is carried out within the scope of preset control parameters according to the active power of monitoring and the operating parameter of electrode current
Section；According to the electrode length of monitoring and press whether the operating parameter of time carries out Electrode Fluctuation within the scope of preset control parameters
It adjusts.
5. mineral hot furnace autocontrol method as claimed in claim 4, it is characterised in that: specifically: judging that the electrode of monitoring is flat
Whether equal depth exceeds preset control parameters, if electrode mean depth exceeds preset control parameters, electrode always rises or always drops；It is no
Then, judge whether the arc voltage of monitoring is not less than preset control parameters and whether electrode current is greater than preset control parameters, if
It is that electrode always rises when electrode pan feeding depth is not less than the control parameter upper limit；Otherwise, judge whether the arc voltage of monitoring is not more than
Whether preset control parameters and electrode current are less than preset control parameters, if so, electrode pan feeding depth is no more than under control parameter
Electrode always drops in limited time；Otherwise, judge whether the active power of monitoring is greater than control parameter upper limit value, if transformer reduces by one grade
Voltage；Otherwise, judge whether the active power of monitoring is less than control parameter lower limit value and whether electrode current is less than default control
Parameter, if transformer increases one grade of voltage；Otherwise, judge monitoring electrode length whether be greater than preset control parameters and whether
It pressed away from last time more than the shortest time, if so, single-phase press；Otherwise judge whether the electrode length of monitoring is greater than default control ginseng
It counts and whether pressed away from last time more than maximum duration, if so, single-phase press.
6. mineral hot furnace autocontrol method as claimed in claim 3, it is characterised in that: the leveling three-phase electrode electric current uses
Band facies principle levels three-phase current.
7. mineral hot furnace autocontrol method as described in claim 1, it is characterised in that: further include to each electricity of the mineral hot furnace of monitoring
The operating parameter of gas information carries out modeling operation, updates control parameter.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113783210A (en) * | 2021-09-02 | 2021-12-10 | 锦州天亿电容制造有限公司 | Treatment method for three-phase unbalance of transformer for mining and smelting furnace |
| CN114659373A (en) * | 2022-03-22 | 2022-06-24 | 宁夏昌茂祥冶炼有限公司 | Submerged arc furnace system with automatic electrode lifting function and control method thereof |
| CN114990272A (en) * | 2022-04-14 | 2022-09-02 | 山西太钢万邦炉料有限公司 | Operation method of constant electrode and constant electric field electrode of large submerged arc furnace |
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