CN106795573A - Method and apparatus for determining the ignition time point during oxygen blowing - Google Patents

Method and apparatus for determining the ignition time point during oxygen blowing Download PDF

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Publication number
CN106795573A
CN106795573A CN201580053187.4A CN201580053187A CN106795573A CN 106795573 A CN106795573 A CN 106795573A CN 201580053187 A CN201580053187 A CN 201580053187A CN 106795573 A CN106795573 A CN 106795573A
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Prior art keywords
oxygen
ignition
duration
determining
value
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CN201580053187.4A
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CN106795573B (en
Inventor
B.沃格马尔
F.哈特
A.罗尔霍弗
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Primetals Technologies Austria GmbH
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Primetals Technologies Austria GmbH
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/35—Blowing from above and through the bath
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/38—Removal of waste gases or dust
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4673—Measuring and sampling devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D21/0014—Devices for monitoring temperature

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Endoscopes (AREA)
  • Air Bags (AREA)

Abstract

The present invention relates to be used to determine in converter（1）During middle oxygen blowing, the method for the ignition time point particularly in basic oxygen process, wherein determining to be blown into the oxygen value of amount of oxygen（110）With the outlet air temperature of the current exhaust gas temperature in the exhaust produced due to oxygen blast process（20）, and the time point of the predetermined exhaust temperature limit value in the predetermined oxygen limiting value and the exhaust that reach the amount of oxygen simultaneously is defined as ignition time point.Equipment the invention further relates to be particularly suitable for performing methods described.

Description

Method and apparatus for determining the ignition time point during oxygen blowing
Method and apparatus for determining the duration of ignition during oxygen blast.
The present invention relates to one kind for determining Oxygen Steelmaking Process in, the duration of ignition in converter particularly in LD methods Method, wherein determining oxygen value and outlet air temperature, and corresponding equipment.
The purpose of steel production is manufacture steel, and in other words, manufacture has low carbon content and required characteristic such as hardness, antirust The ferroalloy of property or formability.
In converting process, the pig iron is refined with oxygen.Reduce carbon component（Refining）Oxidizing process bring in the method Enough heats do not need outside heat supply to keep steel to melt in converter.Converting process can be further divided into oxygen steelmaking Process and bottom blowing process.Bottom blowing process includes Bessemer methods, Thomas methods, wrought iron and early stage blast furnace.Most well-known oxygen Gas steelmaking process is LD methods.
In Linz-Donawitz methods（Abbreviation LD methods）In, scrap metal and liquid pig iron are poured into LD converter, and added Enter slagging components.Oxygen is blown on melt by spray gun.In this process, it is undesirable to associated element such as sulphur, phosphorus, carbon etc. exists Burnt in steel and entered in flue gas or slag.Because the huge heat related to burning is produced, the old metal for being added is melt Change and/or the use of the pig iron can be reduced, and melt is cooled down by adding old metal and ore.Blasting time is 10 to 20 Minute, and be chosen to realize needed for decarburization and undesirable impurity burning and desired final temperature.Pass through Bof vessel is poured into ladle to go out finished steel.First, iron content bath is more than 1600At a temperature of pass through tapping hole quilt It is discharged in ladle, then pours out slag from converter edge.
Converter can be installed in the converter housing with sliding door（" kennel "）In, and the task of converter housing is to protect Shield surrounding environment is directed to from the injection from converter and by the gas surge between converter is exported and is vented cooling dome In cooling dome or be directed to secondary air extract in.Bloodstone plate is mainly used as fiery side lining；Some regions receive fire resisting and smash Gu, or also receive heat-resisting steel sheet and plate in the region of flexible roof.
However, the burning in converter is not just to be immediately begun to when oxygen is injected at first, but generally it is delayed by several Can not spontaneously start the predetermined time after second to up to 90 seconds.It is very heavy for the understanding of the accurate duration of ignition Want because oxygen only from now with fusant reaction, and the reaction the actual duration for process control and steel Quality, particularly its carbon content are conclusive.Together with other parameters, the duration of ignition makes it possible to control from start to end Converting process processed.By being accurately known that the duration of ignition, the quality of steel can be improved, and no longer need to spray into oxygen again （After-blow）Or carburizing again（It is related to sulphur is further used）.The repeatability of converting process is improve, this is also to technology chain Further step produces active influence, such as second metallurgy.
It not is completely reliable being manually entered or automated system that currently employed method is based on.Till now, light a fire Time is determined by operator by observing converter, therefore the duration of ignition is manually entered in Process Control System.However, strong cigarette With dust formation infringement operator clear and definite igniting identification, just as operator lack experience or it is any do not note.So And, several seconds between the method and actual ignition time and the record of the duration of ignition, the time delay of usually up to 30 seconds it is related Connection.But, this delay of the duration of ignition determines for process control it is unfavorable.Additionally, in retrospect can not be accurately true Determine the duration of ignition, and only approximate determine.
Thermal expansion in gun head can be used for determining the duration of ignition（By strain gauge）.However, this needs quite Many tech spending and can only realize that the delay of the duration of ignition determines.
For example, when kennel is opened, operating personnel can promptly appreciate that reaction and identification ignition time.However, an opening Kennel always bring huge security risk.Therefore, the duration of ignition can manually be set by pressing button.Operating personnel are also Reaction can on a monitor be followed by the video camera installed.
Automated optical method is the assessment system that camera record is linked to analytical photography material, so as to by the duration of ignition Automatically it is relayed to process model.However, the solution with camcorders causes substantial amounts of mounting cost, because shooting Machine must correspondingly be cooled, and must assure that will not contaminated aperture, in other words, converter outlet accessible sight Examine.
Under the background of Oxygen Steelmaking Process, the multiple operational factors of record are disclosed from the A1 of DE 10 2,012 224 184 And the target variable of operation is determined by associating the operational factor.The operational factor to be recorded includes exhaust composition, exhaust Temperature and converter flame radiation power etc..The target variable specified is the composition of final carbon content, temperature and melt.
The A1 of WO 20,07/,109 850 are disclosed under the background of oxygen blast furnace operation, and exhaust group is determined by photo-sensitive cell Into and considering the composition during operation of blast furnace.
It is known by photocell from the 283B of patent specification AT 299, in other words it is sensu lato electron tube measurement Flame brightness is determining the accurate duration of ignition.Photocell arranges that its optical axis flatly goes out in converter according to the 283B of AT 299 The top edge top about 10cm of mouth so that when flameproof enclosure is opened, its detection is transmitted into the top edge and flameproof enclosure of converter outlet （Extractor cover）Lower edge between radiation.Photocell is adjusted now so that its control electric current is greater than about 1100, preferably About 1200Goal response gas at a temperature of occur, and thus described the duration of ignition.Photronic control electric current triggering is pre- The measurement of fixed " metallurgy " amount of oxygen.
The disadvantage is that, this only provides single data values, such value is often not enough to use for the B of AT 299 283 method Recognized in the reliable igniting of Oxygen Steelmaking Process.Photocell can also be triggered by disposable failure, for example, near photronic Single spark, although the actual ignition of oxygen does not occur also.
In the A4 of AT 509 866, from oxygen air blast or certain O is reached earliest2Flow starts, by means of ccd image The multiple chronological image in the region between sensor record converter outlet and extractor cover, based on being surveyed by the sensor The radiation intensity of amount, determines the process of radiation intensity as time goes by, and will realize that predetermined radiation intensity or radiation are strong Degree makes a reservation for the increased time as the duration of ignition.
Therefore, it is an object of the invention to describe a kind of side for allowing reliability and redundantly determining the duration of ignition in detail Method.Second purpose is to disclose a kind of equipment for being particularly suitable for and performing the method.
The purpose related to the method by disclose it is a kind of for determining the Oxygen Steelmaking Process in converter in, particularly The method of the duration of ignition in LD methods realizes, wherein it is determined that the oxygen value of top blast amount of oxygen and due to oxygen steelmaking mistake The outlet air temperature of the current exhaust gas temperature in the exhaust that journey is produced, while reaching the predetermined oxygen threshold value of the amount of oxygen The time of the predetermined delivery temperature threshold value in value and exhaust is set to the duration of ignition.
Device-dependent purpose is by open a kind of for determining the igniting in Oxygen Steelmaking Process, particularly LD methods The equipment of time realizes, including for injecting the converter of oxygen, wherein it is determined that the oxygen value of top blast amount of oxygen and determining The outlet air temperature of the current exhaust gas temperature in the exhaust produced due to Oxygen Steelmaking Process, while realizing the pre- of amount of oxygen The time for determining the predetermined delivery temperature threshold value in oxygen threshold value and exhaust can be set up as the duration of ignition.
In converting process, oxygen is blown on melted metal.This accumulation, the O that is blown into2Amount is for example, by body Product flow measuring sensor is measured and is for example relayed to computer system together with the outlet air temperature of current measurement. Recognize, once light a fire, it is possible to set up the increase of outlet air temperature.If the value can obtain certain top blast O2Amount Exceed predetermined threshold value value simultaneously, then can be concluded that realization igniting.In other words, by O2With temperature conditionss with associate, for example, With O2Amount>270Nm3 and temperature>500Form, produce very robust and reproducible ignition condition, this causes operator's Relatively insecure igniting identification is eliminated.
The present invention realizes reliable automatic ignition identification.The present invention also allows for more accurately obtaining process model Desired value.It is also possible to reduce after-blow routine, and the O needed for can saving converting process2.It is existing according to the present invention Reproducible steel quality can produced.If additionally, there is O2Volume flow measurement, then can be effective with cost of implementation Implement.If there is no this measurement, then it is also cost-effective to install the renewal operation of this measurement.The present invention can be maximum Limit ground uses converter gas, because the gas can be securely fed by the primary dedusting in gas gauge.By two grades Dedusting can also be obtained due to detecting O too late2The reduction of explosion danger caused by the igniting of air blowing process.By this hair It is bright, the process model for more preferably being adjusted can be advantageously produced, and therefore can produce more preferable steel quality.It is simple to implement It is also advantageous.
List other favourable measures in the dependent claims, these measures can as needed combination with one another with reality Existing other advantages.
In an advantageous embodiment, outlet air temperature, particularly hanging down in exhaust uptake are recorded on exhaust uptake Straight part is upper or on the part being arranged in the way of fluid technique before devaporizer import.Can also evaporate cold But outlet air temperature is recorded at the devaporizer import of device.The measurement of temperature is extremely simple and/or measurement apparatus there Installation is particularly easy to.
Preferably, oxygen value and outlet air temperature are continuously determined.Once the top blast of oxygen started and/or in the top blast phase Between and/or during top blast process, it is also possible to continuously determine oxygen value and outlet air temperature.Can be by less measurement Value realizes the simplification of the method.However, other positions are also what is be contemplated that.
In a preferred embodiment, oxygen value is determined by means of volume flow measurement sensor.Oxygen is blown by spray gun Enter in converter, wherein spray gun is connected to source of oxygen by valve.Preferably, oxygen value is now by installed in the region of the valve In, the volume flow measurement sensor being particularly wall-mounted on the valve determines.Oxygen can be particularly simply determined there Value.
Preferably, oxygen threshold magnitude and/or outlet air temperature are empirically determined.That is, using signal Notify that the threshold value of igniting is empirically determined, such as based on measurement result series.These can change, for example, depending on Converter and converter content.Threshold value can be stored in database.These can also update at certain intervals.
Preferably, the outlet air temperature and oxygen value of current measurement are relayed to computing unit.In a preferred embodiment, Computing unit includes parser, and the parser is at least by the outlet air temperature and oxygen value of current measurement and exhaust temperature Angle value and oxygen threshold magnitude are compared.
Preferably, parser is just activated in computing unit when oxygen air blast starts.However, parser is only Can be activated in computing unit during oxygen air blast.In converting process, oxygen is blown on melted metal.It is this O accumulating, being blown into2Measure and measured for example, by volume flow measurement sensor and together with the outlet air temperature of current measurement It is relayed to computer system.Parser is run on the computer systems.Parser is now based on following correlation：If Igniting is had occurred and that, then can set up the increase of outlet air temperature.If there is certain top blast O2The value exceedes while amount Default threshold value, then can be concluded that igniting has occurred and that.By the feedback from the process stage in Current developments, can swash The relative assessment of work.Therefore, parser can be not used during charging, after-blow, separation etc., but in air blast circulation Used during beginning.
It is furthermore possible to also provide the monitoring of being raised to temperature in computing unit and the relation between oxygen value.If There is no this relation, particularly if occurrence temperature is not raised, then can preferably send alarm.Alarm system can also be provided System and/or user interface（HMI=human-computer interface system）And/or multimedia equipment, alarm is relayed to this.
Then alarm can be relayed to user interface by warning system first（HMI=human-computer interface system）And/or many matchmakers Body equipment.Because temperature is raised and O2Relation between concentration is the characteristic feature of converting process, and this equally can be by computer System monitoring.If this relation does not occur after the sufficiently long time, then it may be assumed that there is problem in converting process.Should Alarm can be provided to warning system, or by user interface（HMI）Or other mobile visualization equipment are notified by signal To operating personnel.
Video camera with the sensor comprising multiple photodiodes can also be provided, preferably sensed with ccd image The optical axis of device, wherein video camera and the gap alignment between converter outlet and extractor cover, and for assessing the figure of video camera The computer of picture, its Computer is programmed such that the radiation intensity due to being received from sensor, and the computer determines that radiation is strong Spend the process that changes with time.Earliest（Because other flames for being otherwise not from igniting still may burn brightly）Open Start from oxygen air blast（For example, when certain oxygen flow is reached）, by the sensor record comprising multiple photodiodes Multiple chronological images of the same area between converter outlet and extractor cover, wherein each photodiode pair Ying Yuyi pixel, preferably by ccd image sensor, determines that radiation is strong based on the radiation intensity measured by photodiode Degree changes with time process, and is up to the predetermined increased time of predetermined radiation intensity or radiation intensity and is defined as lighting a fire Time.Both apparatus/methods can also be associated to determine the duration of ignition.Association both approaches provide the duration of ignition More preferable result.
The method according to the invention and equipment of the invention realize reliable automatic ignition identification.Triggered time Precision can also be improved further.Can also realize that the more accurate of desired value of latent process model is realized and after-blow routine journey The reduction of sequence.Advantageously, also save in the O needed for converting process2.Reliable automatic ignition identification ensures that production is repeatable Steel quality.In other words, process model makes it possible to produce more preferable steel quality after preferably adjusting.
Due to detecting O too late2The reduction of the risk of explosion caused by the igniting of converting process in two-stage dust removal is special Favourable.The cost-effective implementation of method and/or equipment is also possible, because O2Volume flow measurement is easily disposed.Turn The maximum use of furnace gases is also possible, because this can reliably be controlled by the primary dedusting in gas gauge.This Invention can also be cost-effectively attached in existing condition monitoring system.
Supplementary features of the invention, characteristic and advantage will manifest from the description below with reference to accompanying drawing.Accompanying drawing shows figure Diagrammatic view：
Fig. 1：The side cross-sectional view of the converter with sensor of the invention,
Fig. 2：The diagrammatic view of the method.
Although the present invention is illustrated in greater detail and described by preferred exemplary embodiment, the invention is not restricted to Disclosed example.Those skilled in the art can not depart from the situation of the scope of the present invention being defined by the following claims Under derive its modification.
Fig. 1 shows converter 1, wherein having promise to be refined, i.e. old metal and the block pig iron 2 and liquid pig iron 3.Exhaust Flue 4 is arranged in converter outlet top, and converter 1 is tapered upwards towards flue.This can be divided into some and to flow The mode of body technique is connected to evaporator cooler 16.Can decline along double-head arrow 6 and/or elevated extractor cover 5 around Exhaust uptake 4.It is used to seal converter outlet and collect live gas during refining.The spray gun 7 that can be lifted and reduced leads to The hole 8 for crossing exhaust uptake 4 is inserted into converter 1.
Spray gun 7 is from position H2It is lowered to operating position H1, in position H2Middle spray gun 7 is drawn out and oxygen with continuous stroke Source of the gas is not yet opened.Reach operating position H1Shortly before, open source of oxygen and discharge the oxygen 9 needed for blowing.Spray gun 7 enters One step is lowered, while oxygen 9 is released from outlet, until it reaches operating position H1, it is shown by chain-dotted line.Once reach Operating position H1If without firing delay, should light a fire immediately.If however, the old metal that is highlighted of igniting or Analog postpones, then a certain amount of oxygen effusion, and it is not involved in purifying reaction and must be considered.
In the event of lighting a fire, then mainly include carbon monoxide（CO）Reacting gas 10 rise from converter 1.Then, such as Fig. 1 Shown, extractor cover 5 is opened so that so-called to leak out 11 by between extractor cover 5 and converter 1 and/or its converter outlet Gap flows into.The carbon monoxide of reacting gas 10 and air burning.Air blast oxygen starts with the carbon from the pig iron in igniting Burning produces bright white flame and/or gas.
In Oxygen Steelmaking Process, in high pressure（Up to 12 bars）It is lower that oxygen is blown on bath of molten metal.Acutely anti- Ying Zhong, oxygen oxidize iron into iron oxide with by oxidation of coal into carbon monoxide（CO）, be transferred to for oxygen immediately adjoint by wherein iron oxide Element.At the center of reaction, i.e. focal point, temperature is 2500 to 3000, and there is the boiling of fierce rolling, this The part being not yet refined of the bath is taken to the focus during the process.
The accurate identification ignition time controls to be very important for the accurate process by process model.From this time, By the O of air blast top-submerged lance2Start and melted metal reaction.If this time is not correctly validated, it may have There is the consequence of the such as inaccurate realization of the desired value of process model.It is likely to need after-blow routine.
As the result of " after-blow ", it is also possible to which increased O occurs2Consumption.As another knot of the time of inaccurate detection Really, it is also possible to produce not reproducible steel quality.The CO gases that the process is produced can not using-it is completely burned.
When imflammable gas is fed by bag filter system, it is also possible to there is the blast of increased two-stage dust removal Risk.Additionally, it not is completely reliable being manually entered or automated system that currently used method is based on.
Therefore, difficulty related to the vision igniting identification of operator during LD is well-known：Reproducibility Difference can not possibly be, it is necessary to experienced crucible driver, and kennel must be opened when starting in the blowing stage, cause potential safety wind Danger, etc..If the ignition signal in terms of without operator, this may cause the load of exhaust uptake 4 to increase.It is at some In system, ignition signal is then automatically generated after the sufficiently long time, including significantly postpone compared with the actual ignition time Signal.
Now by present invention, avoiding these problems.
The method and/or equipment for being proposed are based on pair oxygen value related to the outlet air temperature in exhaust, that is, to tire out Long-pending is blown into O2The analysis of amount.The two parameters have clear and definite relation, are achieved in igniting identification.
Fig. 2 shows methods described in diagrammatic view.
According to the present invention, the oxygen value 110 of top blast amount of oxygen is determined, and determine what is produced due to Oxygen Steelmaking Process The outlet air temperature 20 of the current exhaust gas temperature in exhaust, wherein reaching predetermined oxygen threshold value and the row of the amount of oxygen simultaneously Time during predetermined delivery temperature threshold value in gas is set up as the duration of ignition.
In converting process, oxygen is blown on melted metal.Oxygen value 110, is also been described as being blown into O2Amount 110, for example measured by volume flow measurement sensor and be relayed to meter together with the outlet air temperature 20 of current measurement Calculation machine system 40.Parser 30 is run in computer system 40.For example in devaporizer import 15（Fig. 1）Upper record row Temperature value 20.Can also be in exhaust uptake 4（Fig. 1）Upper record outlet air temperature 20, particularly in exhaust uptake 4（Fig. 1）'s In fluid technique mode immediately in devaporizer import 15（Fig. 1）On part 14 above.Can also be in exhaust uptake 4（Figure 1）Vertical portion 17（Fig. 1）On record the temperature value.Temperature sensor 18（Fig. 1）It is extremely simple at these points.
Oxygen value 110 and outlet air temperature 20 can continuously determine, or after oxygen blast at the top of beginning and/or Continuously determine during top blast.Other arrangements are also what is be contemplated that, as long as they realize their purpose.
Parser 30 is now based on following relation：If having occurred and that igniting, outlet air temperature 20 can be set up Increase.If the outlet air temperature 20 exceedes default threshold value, while in the presence of certain top blast O2Amount 110, then can be concluded that Igniting has occurred and that.
According to the present invention, O2Cause very robust and reproducible ignition condition with associating with temperature conditionss, for example, with Oxygen value>270Nm3With outlet air temperature>500Form, its cause operator it is relatively insecure igniting identification quilt Eliminate.Can be empirically determined based on measurement result series and want the oxygen threshold value of predetermined amount of oxygen and to predefine For signal notify igniting delivery temperature threshold value.These for example can change according to converter.It is also possible, however, to use Other mathematical methods for setting up threshold value.
By the feedback from the process stage 50 being currently used, can activate to its its assessment.Therefore, parser 30 can be not used during charging, after-blow, separation etc., but be to be used when blowing circulation starts.
Because the relation between temperature rising and oxygen value is the characteristic feature of converting process, this equally can be by calculating Machine system 40 is monitored.If this relation does not occur after the sufficiently long time, assume that converting process has problem. The alarm can be provided to warning system 60, or by means of user interface（Man-machine interface）70 or another mobile visualization Equipment 80 signals operating personnel.
The equipment is particularly suitable for performing the method according to the invention.
The present invention can eliminate " the artificial uncertain factor " related to igniting identification, cause higher and/or more reproducible Product quality.Crucible driver no longer needs to worry that igniting identification and/or process control are simplified（Save control element）.This Outward, security can be increased, because kennel no longer needs to be opened when starting in the blowing stage.
Reference numerals list
1 converter, especially steel converter
2 old metal and the block pig iron
3 liquid pig irons
4 exhaust uptakes
5 extractor covers
6 extractor covers 5 are lowered and/or elevated direction
7 spray guns
The hole of 8 spray guns 7
9 oxygen
10 reacting gas
11 leak out
14 exhaust uptakes part obliquely
15 devaporizer imports
16 devaporizers
The horizontal component of 17 exhaust uptakes
18 temperature sensors
20 outlet air temperatures
30 parsers
40 computer systems
50 process stages
60 warning systems
70 user interfaces（HMI=people's interface system）
80 multimedia equipments
110 oxygen values
H1The operating position of spray gun 7
H2The position of spray gun 7, wherein source of oxygen are opened.

Claims (21)

1. a kind of for determining in converter（1）In middle Oxygen Steelmaking Process, the method for the duration of ignition particularly in LD methods,
Characterized in that, determining the oxygen value of top blast amount of oxygen（110）In the exhaust produced due to Oxygen Steelmaking Process Current exhaust gas temperature outlet air temperature（20）, and will simultaneously reach the predetermined oxygen threshold value of the amount of oxygen and described The time of the predetermined delivery temperature threshold value in exhaust is defined as the duration of ignition.
2. the method for being used to determine the duration of ignition as claimed in claim 1,
Characterized in that, determining outlet air temperature at the devaporizer import of devaporizer（20）And/or in exhaust cigarette Road（4）On outlet air temperature（20）, particularly described exhaust uptake with fluid technique mode immediately in it is described evaporation cooling Part before device import.
3. such as the method for determining the duration of ignition in any one of the preceding claims wherein,
Characterized in that, continuously determining the oxygen value（110）With the outlet air temperature（20）.
4. the method for determining the duration of ignition as any one of preceding claims 1-2,
Characterized in that, continuously determining the oxygen after the top blast of the oxygen starts and/or during the top blast Value（110）With the outlet air temperature（20）.
5. such as the method for determining the duration of ignition in any one of the preceding claims wherein,
Characterized in that, determining the oxygen value by volume flow measurement sensor（110）.
6. the method for being used to determine the duration of ignition as claimed in claim 5,
Characterized in that, the oxygen passes through spray gun（7）It is blown into the converter（1）In, wherein the spray gun（7）By valve with Source of oxygen is connected, and wherein described amount of oxygen value（110）Determination be by the region of the valve, particularly installing Volume flow measurement sensor on the valve is carried out.
7. such as the method for determining the duration of ignition in any one of the preceding claims wherein,
Characterized in that, empirically determining oxygen threshold magnitude and/or outlet air temperature.
8. such as the method for determining the duration of ignition in any one of the preceding claims wherein,
Characterized in that, the outlet air temperature of current measurement（20）With oxygen value（110）It is relayed to computing unit（40）, and And the computing unit（40）Including parser（30）, the parser is at least by the outlet air temperature of the current measurement （20）With the oxygen value（110）It is compared with the exhaust gas temperature value and oxygen threshold magnitude.
9. the method for being used to determine the duration of ignition as claimed in claim 8,
Characterized in that, the computing unit（40）In the parser（30）Just swashed when oxygen air blast starts It is living.
10. the method for being used to determine the duration of ignition as claimed in claim 8,
Characterized in that, the computing unit（40）In the parser（30）Only swashed during the oxygen air blast It is living.
11. such as the method for determining the duration of ignition in any one of the preceding claims wherein,
Characterized in that, also monitoring temperature is raised and oxygen value（110）Between relation, and if the relation is not sent out It is raw, especially, if temperature is raised without occurring, send alarm.
12. methods for being used to determine the duration of ignition as claimed in claim 11,
Characterized in that, the alarm is relayed to warning system（60）And/or user interface（HMI=human-computer interface systems） （70）And/or multimedia equipment（80）.
13. it is a kind of for determining Oxygen Steelmaking Process in, the especially equipment of the duration of ignition in LD methods,
Including converter（1）,
Characterized in that, determining the oxygen value of top blast amount of oxygen（110）, and determine to be produced due to the Oxygen Steelmaking Process Exhaust in current exhaust gas temperature outlet air temperature（20）, and the predetermined oxygen threshold value for realizing the amount of oxygen at the same time Time during predetermined delivery temperature threshold value in value and the exhaust can be set up as the duration of ignition.
14. equipment as claimed in claim 13,
Characterized in that, devaporizer（16）It is provided with devaporizer import（15）And exhaust uptake（4）, and can be The devaporizer import（15）Place and/or in the exhaust uptake（4）On record the outlet air temperature（20）, especially It is in the exhaust uptake（4）With fluid technique technical approach immediately in the devaporizer import（15）Part above On.
15. equipment as any one of preceding claims 13 and 14,
It is characterized in that, there is provided for determining the oxygen value（110）Volume flow measurement sensor.
16. equipment as claimed in claim 15,
Characterized in that, the oxygen can be by spray gun（7）It is blown into the converter（1）In, wherein the spray gun（7）Pass through Valve is connected with source of oxygen, and wherein described volume flow measurement sensor is installed in the region of the valve, is particularly pacified On the valve.
17. equipment for determining the duration of ignition as any one of preceding claims 13-16,
It is characterized in that, there is provided computing unit, and the outlet air temperature for currently measuring（20）With oxygen value（110）Can be by After to the computing unit, and the computing unit includes parser（30）, the parser is at least by the current survey The outlet air temperature of amount（20）With the oxygen value（110）It is compared with the outlet air temperature and oxygen threshold magnitude.
18. equipment for being used to determine the duration of ignition as claimed in claim 17,
Characterized in that, just activating the parser in the computing unit when oxygen air blast starts（30）.
19. equipment for being used to determine the duration of ignition as claimed in claim 17,
Characterized in that, the parser in the computing unit（30）Only it is activated during the oxygen air blast.
20. equipment for determining the duration of ignition as any one of preceding claims 13-19,
Characterized in that, monitoring temperature is raised and oxygen value（110）Between relation, and if the relation is not sent out It is raw, especially, if temperature is raised without occurring, alarm can be sent.
21. equipment for determining the duration of ignition as any one of preceding claims 13-20,
It is characterized in that, there is provided warning system（60）And/or user interface（HMI=human-computer interface systems）（70）And/or multimedia Equipment（80）, the alarm is relayed to the warning system（60）And/or user interface（HMI=human-computer interface systems）（70） And/or multimedia equipment（80）.
CN201580053187.4A 2014-09-30 2015-08-06 Method and device for determining the ignition time point in an oxygen converting process Active CN106795573B (en)

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EP14186962.8A EP3002342A1 (en) 2014-09-30 2014-09-30 Method and device for determining the time of ignition in an oxygen blowing method
PCT/EP2015/068148 WO2016050399A1 (en) 2014-09-30 2015-08-06 Method and device for determining the point in time of ignition during an oxygen blowing process

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CN115491459A (en) * 2022-08-30 2022-12-20 石钢京诚装备技术有限公司 Method for climbing at start of blowing oxygen flow of dry dedusting converter

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EP3201367A1 (en) 2017-08-09
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BR112017006451A2 (en) 2017-12-12
BR112017006451B1 (en) 2022-01-18
CN106795573B (en) 2020-08-18
WO2016050399A1 (en) 2016-04-07

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