CN1382223A - Method for operating gas generating furnace - Google Patents
Method for operating gas generating furnace Download PDFInfo
- Publication number
- CN1382223A CN1382223A CN00814552A CN00814552A CN1382223A CN 1382223 A CN1382223 A CN 1382223A CN 00814552 A CN00814552 A CN 00814552A CN 00814552 A CN00814552 A CN 00814552A CN 1382223 A CN1382223 A CN 1382223A
- Authority
- CN
- China
- Prior art keywords
- oxygen
- gas
- melt
- containing gas
- iron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 28
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 137
- 239000001301 oxygen Substances 0.000 claims abstract description 137
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 137
- 239000007789 gas Substances 0.000 claims abstract description 114
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 88
- 229910052742 iron Inorganic materials 0.000 claims abstract description 44
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 18
- 230000002829 reductive effect Effects 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 239000007787 solid Substances 0.000 claims abstract description 14
- 229910000805 Pig iron Inorganic materials 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 230000001105 regulatory effect Effects 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 claims abstract description 3
- 239000001257 hydrogen Substances 0.000 claims abstract description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 238000010079 rubber tapping Methods 0.000 claims description 13
- 238000009423 ventilation Methods 0.000 claims description 13
- 230000009467 reduction Effects 0.000 claims description 12
- 239000003818 cinder Substances 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 238000003723 Smelting Methods 0.000 claims description 3
- 239000003245 coal Substances 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 4
- 239000000969 carrier Substances 0.000 abstract 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 abstract 1
- 239000007791 liquid phase Substances 0.000 description 11
- 230000001771 impaired effect Effects 0.000 description 8
- 239000007921 spray Substances 0.000 description 6
- 230000008021 deposition Effects 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000002309 gasification Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 210000000038 chest Anatomy 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 150000001875 compounds Chemical group 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
- C21B13/0013—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state introduction of iron oxide into a bath of molten iron containing a carbon reductant
- C21B13/002—Reduction of iron ores by passing through a heated column of carbon
-
- 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
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Charging Or Discharging (AREA)
Abstract
The invention relates to a method for operating a gas generating furnace in which iron-containing charge materials, such as partially and/or fully reduced sponge iron, are completely reduced on a fixed bed of solid carbon carriers, even when oxygen-containing gas is fed through a plurality of oxygen nozzles distributed around the gas generating furnace and solid carbon carriers are introduced, and are melted to form liquid pig iron or primary steel, while simultaneously forming a reducing gas containing carbon monoxide and hydrogen, wherein the oxygen-containing gas is fed through a gas line to the oxygen nozzles and from there the oxygen-containing gas is blown into the fixed bed, wherein the feed of the oxygen-containing gas to the oxygen nozzles in the plurality of gas lines is individually regulated and a predetermined volume flow of the oxygen-containing gas is regulated. Through the specific invention scheme, the oxygen nozzle can be prevented from being damaged and the uniform input of oxygen or energy into the gas generation furnace can be ensured.
Description
The present invention relates to the method for operation of melt-down gasifier, in described smelting furnace, iron-containing charge such as partial reduction and/or fully the reductive sponge iron be distributed in the oxygen jet input oxygen-containing gas around the melt-down gasifier by many and adding under the situation of solid carbon carrier also in reduction and form at the same time under the situation of the reducing gas that contains carbon monoxide and hydrogen and be smelted into liquid pig iron or elementary molten steel fully on the fixed bed that constitutes by the solid carbon carrier, wherein oxygen-containing gas is sent to oxygen jet by gas piping and from oxygen-containing gas being blown into fixed bed here.Theme of the present invention also is a melt-down gasifier of carrying out the inventive method.
In the melt-down gasifier of the above-mentioned type, the conveying of oxygen-containing gas is to lead to an intake line that surrounds the circular line of melt-down gasifier by one to carry out.Oxygen-containing gas is assigned to oxygen jet that leads on being installed in around the melt-down gasifier and the fixed bed that is blown into melt-down gasifier or is made of the solid carbon carrier therein from this circular line.
When melt-down gasifier is worked, the ventilation property fluctuation of fixed bed has appearred, this hindered or make from around the gas input evenly carried out and and then energy input become difficulty.In this case, uneven distribution of air flow has appearred on these oxygen jets, the process that this has correspondingly influenced melting unfriendly and has produced coal gas.
Since in melt-down gasifier by the solid carbon carrier and by the gasification by oxygen-containing gas obtained reducing gas and and then obtained the required energy of melting sponge iron, so, the energy supply also conveying with oxygen-containing gas always is relevant, here, " energy supply " or " energy input " also are understood that the oxygen-containing gas supply or are blown in the melt-down gasifier.
So strong and so that when the air-flow of some nozzles having occurred and interrupting very momently when the fluctuation of above-mentioned ventilation property, melt cinder and/or liquid pig iron can enter and be arranged on the duct before the oxygen jet or flow to oxygen jet always and blocked air-flow thus and damaged oxygen jet.Such job failure often need stop melt-down gasifier, so that maintenance slag input or impaired nozzle.
In DE3742156C1, a kind of method of operation of melt-down gasifier is disclosed, wherein, when the oxygen delivery fault occurring or reducing, so prevent spray nozzle clogging or impaired, promptly forbid may be also in the oxygen delivery of carrying out and replace by oxygen jet rare gas element is blown in the melt-down gasifier.
This method is applicable to really under the situation of the job failure that will occur anyway and reduces other disadvantageous result oxygen jet is impaired in other words, but when working in accordance with regulations, the slagging scorification and the damaged phenomenon that can't prevent owing to there is the ventilation property fluctuation.
Therefore, task of the present invention provides a kind of method of operation and a kind of corresponding melt-down gasifier of melt-down gasifier, has wherein prevented the slagging scorification of the oxygen jet that occurs at work and impaired.Thus one, also thereby can realize higher productivity and save cost the stop time that the needs that this method should be total are shorter.
According to the present invention, in the method for the above-mentioned type, so finish being proposed of task, promptly be adjusted in the conveying of in many gas pipings oxygen-containing gas being sent to oxygen jet, so that adjust the pre-determined volume flow or the mass flow of oxygen-containing gas in these gas pipings or the with it corresponding oxygen jet.
By method of the present invention, for the first time can regulate the flow separately of the oxygen-containing gas that is sent to oxygen jet separately and influence gas distribution in melt-down gasifier clearly.
Up to now, the pressure that are about 8 crust in intake line are reduced to the endless loop pressure that are about 5 crust by flow control device before circular line, this pressure thereby also be present in the gas piping of oxygen jet with oxygen jet on.The operating pressure of melt-down gasifier is about 4 crust, thereby the pressure drop on the nozzle only is about 1 crust.
By method of the present invention, no longer need before circular line, reduce pressure now, thereby the high supply pressure of 8 crust is present in also now in the circular line, this just is reduced to 5 crust subsequently before each oxygen jet.In addition, the pressure drop on the nozzle is about 1 crust.
This explanation at first only be useful in can even gas-pervious fixed bed in.As long as, then be evenly distributed on the input that melt-down gasifier upward carries out oxygen-containing gas all around the ventilation property fluctuation of fixed bed not occurring.
When the described ventilative interference of present appearance, can so overcome this interference by method of the present invention, promptly according to the circulation of being permitted, obviously be reduced in the pressure in each gas piping more or less, as clinging to 5 crust or only to 6 crust from 8.When changing pressure, in present method, involve all oxygen jets, because the fixed bed ventilation property fluctuation that is making progress in melt-down gasifier week, so, occurred all oxygen uneven distribution and and then energy occurred and imported these oxygen jets unevenly, can guarantee uniform distribution by solution of the present invention local influence oxygen input for the first time and by independent adjusting flow.
Advantageous forms of implementation according to the inventive method, carry out oxygen-containing gas is sent to the adjusting of the conveying of each oxygen jet according to the pressure condition in melt-down gasifier, wherein relevant with oxygen jet pressure condition is decided by each self gas permeability or its fluctuation of fixed bed.Preferably so carry out this adjusting, promptly regulate the conveying of oxygen-containing gas being sent to the oxygen jet relevant according to predetermined volumetric flow rate or mass flow again with each fluctuation.
Regulating effect is only suitably carried out according to the nozzle relevant with each ventilation property fluctuation.
In this case, especially take such measure, promptly in many gas pipings, measure one and represent the eigenwert of gas flow and especially volumetric flow rate and pressure perhaps.When being different from predetermined theoretical value, the corresponding as described above oxygen-containing gas pressure that is adjusted in the gas piping is separately gone forward side by side and is adjusted the ideal gas flow.
When problem was tapped a blast furnace in existence, method of the present invention also is applicable to guaranteed suitably to discharge liquid pig iron and melt cinder.
When tapping a blast furnace in melt-down gasifier, throttling flows to oxygen jet in iron notch zone or iron notch upper area to oxygen-containing gas, to guarantee sufficiently long iron notch length.
Mode ground or the various interference when tapping a blast furnace irrespectively strengthen oxygen-containing gas are sent to the conveying that is positioned at the oxygen jet iron notch zone or the iron notch upper area, so that shorten oversize iron notch length as an alternative.
Method of the present invention also is applicable to, when stopping melt-down gasifier, and the bed loss when reducing after stopping to feed, to tap a blast furnace.For this reason, at first throttling or regulate oxygen-containing gas is sent to as far as possible conveying away from the oxygen jet of iron notch.
According to prior art ground input oxygen the time, invaded liquid pig iron of oxygen jet or melt cinder obstruction and impaired always appears when disconnecting melt-down gasifier according to plan.
When melt-down gasifier is shut down, substep and/or continuously throttling oxygen-containing gas is sent to the conveying of some oxygen jets, also avoided such fault reliably thus by method of the present invention.By the inventive method that also changes, overcome the ventilation property fluctuation of the fixed bed of more frequent appearance when melt-down gasifier is shut down reliably.
Theme of the present invention also is a kind of melt-down gasifier, and it has: the feeder that is used for solid carbon carrier such as lump coal and iron-containing charge such as partial reduction and/or complete reductive sponge iron; A melt-down gasifier, it comprises a fixed bed that is made of solid carbon carrier and iron-containing charge; A bottom that is used to hold liquid pig iron or elementary molten steel and melt cinder; An iron notch that is used for melt cinder and liquid pig iron; Oxygen jet in many shells that are arranged on melt-down gasifier; , a circular line, it can be supplied to oxygen jet through gas piping around the shell and the oxygen-containing gas of melt-down gasifier from circular line; Article one, the intake line that is used for oxygen-containing gas, it feeds in the circular line.
According to the present invention, the characteristics of such melt-down gasifier are, are provided with a setting device that is used to regulate the volumetric flow rate of oxygen-containing gas in these gas pipings.
According to the present invention the task that setting device is applicable to that mainly solution is proposed by the invention is set, but it has also produced other advantage.
According to prior art, the oxygen input is what to be undertaken by the unique adjusting annex in leading to the intake line of circular line.In order to overcome very high gas volume and air pressure, must correspondingly design this annex and it can only obtain as special parts.In addition, be so serious at the noise that when 8 pressure that cling to 5 crust reduce, occurs, the result may influence equipment operator's health unfriendly.
The fact is verified, and when adopting the less setting device that can obtain in batches, although have manyly, overall comparable cost has reduced, and the noise load has at first obviously reduced.
According to a preferred embodiment, when being provided with the setting device of a volumetric flow rate that is used to regulate oxygen-containing gas in every gas piping, this is particularly advantageous.
Switch to nitrogen from oxygen at work the time in some nozzles, in some gas pipings, a nitrogen intake line suitably fed in the gas piping before or after setting device.
Therefore, when melt-down gasifier was shut down or start, some nozzles can successively be switched on or disconnect and feed different amount of oxygen or nitrogen amount.Thus one, can be under the few situation of system pressure height and amount of oxygen and however still realize device start with sufficiently high oxygen take-off rate from the beginning.
If in these gas pipings, setting device tightens the front that is connected on oxygen jet at air flow line, and then this is favourable.
Under the situation of liquid phase invasion nozzle flow channel, the Oxygen Flow control and the air pressure formation especially fast of relevant nozzle have been caused very fast and have only limited to thus.Air pressure forms and to have suppressed liquid phase and prevent thus or reduced infringement as far as possible.
Melt-down gasifier preferred design according to the present invention, in these gas pipings, be provided with the pressure and/or measuring apparatus volumetric flow rate and that corresponding actual signal is provided to a control device that are used to measure oxygen-containing gas, wherein at least can be from the external world to control device input be used for gas piping pressure and or the theoretical value of volumetric flow rate, can relatively come independently of one another regulating and controlling device respectively by control device and according to theoretical value/actual value.
Below, describe melt-down gasifier of the present invention in detail in conjunction with form of implementation shown in Figure 1.
Fig. 1 represents the vertical cross-section diagram of melt-down gasifier 1, solid carbon carrier 4 and iron-containing charge 5 is added this smelting furnace from top by feeder 2,3.Carbon support 4 preferably is made of lump coal and/or coke and/or briquette, and iron-containing charge is preferably by partial reduction and/or reductive bulk and/or fine particulate sponge iron constitute fully.
Usually, be provided with reducing apparatus such as direct reduction vertical shaft above melt-down gasifier 1, in direct reduction vertical shaft, iron-bearing materials is reduced into partial reduction and/or reductive sponge iron fully by the reducing gas that produces in melt-down gasifier 1.This sponge iron is sent and is consigned to melt-down gasifier 1 from the reduction vertical shaft.
In the melting gasification zone 6 of melt-down gasifier 1, formed a fixed bed 7 that constitutes by solid carbon carrier 4.In fixed bed 7, be blown into oxygen-containing gas and industrial oxygen preferably by oxygen jet 8, as the oxygen that from the air resolving device, obtains.In this case, form at the same time under the situation of reducing gas, iron-containing charge 5 is smelted into liquid pig iron 9 and melt cinder 10.Formed reducing gas is drawn out of from melt-down gasifier by a reducing gas delivery conduit 11.
Liquid pig iron 9 and melt cinder collect in the bottom 12 of melt-down gasifier 1 and by iron notch 13 and are discharged from.
Oxygen-containing gas at first is supplied to an one-tenth annular ground by an intake line 14 and centers on the circular line 15 of melt-down gasifier 1 and be provided for oxygen jet 8 by gas piping 16 from circular line 15.
In this case, oxygen jet 8 even in shell 17 external regions of melt-down gasifier 1 and by a duct, be communicated with the inner chamber of melt-down gasifier 1.
Be provided with about 20 to 30 oxygen jets 8 altogether on around the melt-down gasifier 1, they are provided with equally spacedly each other respectively and are positioned on the sustained height, thereby oxygen-containing gas tiltedly down is blown in the lower region of fixed bed 7.
In every gas piping 16, be provided with one and be used to measure the pressure of oxygen-containing gas and/or the measuring apparatus 18 of volumetric flow rate.Corresponding measurement signal is provided for a control device 19, can be at least the theoretical value 20 of this control device delivered volume flow.
Have as the 100 tons of pig iron/hourly efficiencys, 100 tons of carbon/hour the melt-down gasifier with the oxygen jet institute preloadings of carbon amount, 26 oxygen jets and 5 crust in, for example be about 1600Nm through the volumetric flow rate theoretical value of every gas piping 16
3/ h.
Always, a setting device 21 as a valve or an adjustable flashboard in every gas piping 16, have been arranged in the front of measuring apparatus 18.
When the observed value of volumetric flow rate was different from predetermined theoretical value, control device 19 adjusted the ideal volumetric flow rate by setting device again.
According to prior art, regulate the conveying of oxygen-containing gas by the annex shown in the dotted line 22 in the drawings.
For oxygen blast is switched to nitrogen flushing, in gas piping 16, and then be provided with a nitrogen intake line 23 therein in setting device 21 back.
The present invention is not limited to embodiment shown in Figure 1, but also comprises the measure that all technician are familiar with, and these measures can be considered for implementing the present invention.
For example, in some or all of gas pipings 16, can before or after setting device 21, insert nitrogen intake line 23.
Below, describe other effect and the advantage of the inventive method and melt-down gasifier of the present invention in detail, if above also it was not carried out explanation.
The correction of ventilation property deviation
By the local modulation amount of oxygen, changed the gas volume that in this zone, when the vaporized carbon carrier, produces.Change by the gas velocity in the cloth that causes thus, can revise and eliminate ventilation property disturbance such as gas passage, fluidization regions or the like.
In addition, side by side carry out the independent adjusting of depth of penetration with it.Therefore, when system pressure remains unchanged, come local depth of penetration and and then energy density and the gas distribution in next-door neighbour's nozzle region that Oxygen Flow is infiltrated fixed bed of adjusting according to the ventilation property disturbance that is occurred.
Energy input
-local the energy input of adjusting
Because inhomogeneous charging is adapted to vertical shaft environment, sponge iron worm conveyor fault, segregation phenomena etc. as making sponge iron worm conveyor discharging power, has occurred local different energy requirement in melt-down gasifier.Give the amount of oxygen of nozzle by independent regulation, can determine energy requirement and energy input relatively in the part.
The correction of-different spray nozzles geometrical shape
In each zone of melt-down gasifier, it may be significant adjusting the energy input deviation for a long time partly.In this case, in order to keep best oxygen take-off rate, used the nozzle of oxygen flow diameter with coordination.Therefore, for example in the iron notch zone, often install and flow to thinner nozzle, so that form the stable iron section that grows by the less energy input.When job failure takes place, may need to adjust the energy input that reduces.By independently amount of oxygen adjusting, can not change nozzle and thereby have associated ground stop time reversibly not carry out energy input at any time.
Above spray nozzle, form deposition
In the melting region above spray nozzle, owing to deposition formation has appearred in the gasification cooling system.On the one hand, people wish that these settlings can protect furnace wall structure and cooling system, on the other hand, if deposition is too many, then job failure can occur.By local modulation energy input (input, depth of penetration), can influence the position of temperature cross section figure motivatedly.On the one hand, deleterious settling is melted, and on the other hand, has formed protective layer motivatedly.
Siege blows
Work period is mainly determined by the wearing quality of the furnace wall in the siege.Long life can only obtain by " from lining ".Indicate to wear and tear in time and gradually and in the iron notch zone, shorten with thermoelectric converter and indicated this wearing and tearing by the section of tapping a blast furnace from lining.Similarly, can in critical area, form or obtain protective layer during with control deposition above nozzle by the local modulation energy input.On the other hand, can reactivate the inactive area of siege by local enhanced energy input.Thereby, for example under the situation of cold hearth, just can strengthen utilizing above iron notch to discharging the very important thorax district of liquid phase.
The discharging problem
Formation/the decomposition of-the section of tapping a blast furnace
In the district of tapping a blast furnace,, generally be pressed into and compensate this wearing and tearing by the iron notch material because of the strong wear of furnace wall has appearred in liquid-flow.However, the section of tapping a blast furnace occurred and shortened, can utilize the energy input of burner hearth nozzle to come the part to reduce the siege amount of blowing and help forming the sufficiently long section of tapping a blast furnace by minimizing.The oversize section of tapping a blast furnace that liquid phase flows out the change difficulty can be shortened by the energy input that improves in the iron notch.
The air pressure in-the district of tapping a blast furnace reduces
Because gas flows out in the district of tapping a blast furnace too much, occurred effusive interference of even, in check tranquil liquid and serious resistivity against fire infringement.Under extreme case, possibly can't keep equipment work again.Gaseous compound forms in the thorax district before being preferably in and tapping a blast furnace.Remove in the relevant nozzle by oxygen is returned, can reduce iron notch place air pressure.
The nozzle infringement
An impaired common reason of nozzle is exactly that liquid phase is infiltrated the oxygen runner.For this reason, liquid pressure must at least temporarily suppress the Oxygen Flow of appearance before nozzle.
-maintenance flows into pulse when ventilation property is disturbed
Ventilation property fluctuation by bed or the high liquid pressure before the nozzle have reduced relevant nozzle amount of oxygen and and then have reduced the inflow pulse.These nozzles allow liquid phase enter in the oxygen runner easily.When independent regulation, irrespectively control the amount of oxygen of each nozzle with condition of nozzles, flow into pulse and remain unchanged as far as possible thus.
-amount of oxygen control when the oxygen runner enlarges
If liquid phase is blocked by Oxygen Flow again after entering nozzle, then the oxygen runner in most of the cases has unfavorable large-size.Therefore, when common the adjusting, utilize the amount of oxygen of impaired nozzle to increase.When independent regulation, can irrespectively make this amount of oxygen be adapted to job requirement with impaired form.
The liquid phase current drainage
When the porosity of bed too hour, occurred undesirable liquid phase in the zone above oxygen jet and assembled.These liquid may be by partial, time-limited and perhaps be periodically to reclaim amount of oxygen and and then reclaim to stop the effusive gas volume of liquid phase and be admitted to easily in the siege of nozzle below.
If current drainage is not fully guaranteed in the part below nozzle, then can suppress liquid phase and enter this zone and and then prevent that nozzle from damaging and job failure by minimizing oxygen.
Suspend in the bed
In gas/cloth convection type reaction vessel, the material flow disturbance (suspension) when having known when surpassing critical parameter (speed, granulometric range etc.).What can imagine is, suspends in such bed to appear at the nozzle top, and that they have caused that furnace gas distributes is obviously inhomogeneous, the uneven reduction of bed and and then unsettled working process.Partial, time-limited and perhaps be that the recovery of periodic amount of oxygen can so reduce the gas volume that is produced, promptly eliminate the suspension phenomenon in early days and can avoid more serious job failure.
Spraying into of water/steam
The adjusting feasible pattern of the temperature profile shape before the nozzle is that water/steam sprays into.According to Working environment, evenly or individually water/quantity of steam is distributed to some nozzles.When the independent control amount of oxygen, can come corresponding adjusting energy input according to water/steam speed that sprays into.
Claims (11)
1, a kind of method of operation of melt-down gasifier, in described smelting furnace, iron-containing charge such as partial reduction and/or fully the reductive sponge iron be distributed in the oxygen jet input oxygen-containing gas around the melt-down gasifier by many and adding under the situation of solid carbon carrier also in reduction and form at the same time under the situation of the reducing gas that contains carbon monoxide and hydrogen and be smelted into liquid pig iron or elementary molten steel fully on the fixed bed that constitutes by the solid carbon carrier, wherein oxygen-containing gas is sent to oxygen jet by gas piping and from oxygen-containing gas being blown into fixed bed here, it is characterized in that, be adjusted in the conveying of in many gas pipings oxygen-containing gas being sent to oxygen jet separately, so that adjust the pre-determined volume flow or the mass flow of oxygen-containing gas in these gas pipings or the with it corresponding oxygen jet.
2, the method for claim 1, it is characterized in that, when fixed bed ventilation property localised waving in melt-down gasifier, occurring and in some gas pipings, producing pressure surge and flow rate fluctuation thus, regulate according to predetermined volumetric flow rate or mass flow again oxygen-containing gas is sent to conveying with the relevant oxygen jet that fluctuates separately.
3, method as claimed in claim 1 or 2, it is characterized in that, in many gas pipings, measure one and represent the eigenwert of gas flow and especially volumetric flow rate and pressure perhaps,, improve or be reduced in oxygen-containing gas pressure in the gas piping separately when being different from when being scheduled to theoretical value.
As the described method of one of claim 1-3, it is characterized in that 4, when tapping a blast furnace, throttling flows to oxygen jet in the iron notch upper area to oxygen-containing gas, to guarantee sufficiently long iron notch length in melt-down gasifier.
5, as the described method of one of claim 1-3, it is characterized in that, when in melt-down gasifier, tapping a blast furnace, strengthen oxygen-containing gas is sent to the conveying of the oxygen jet that is positioned at the iron notch upper area, so that shorten oversize iron notch length.
6, as the described method of one of claim 1-3, it is characterized in that, when stopping melt-down gasifier, at first throttling or regulate oxygen-containing gas is sent to as far as possible conveying away from the oxygen jet of iron notch.
7, a kind of melt-down gasifier (1), it has: be used for solid carbon carrier (4) as lump coal and iron-containing charge (5) as the partial reduction and/or the feeder (2,3) of reductive sponge iron fully; A melt-down gasifier (6), it comprises a fixed bed (7) that is made of solid carbon carrier (4) and iron-containing charge (5); A bottom (12) that is used to hold liquid pig iron (9) or elementary molten steel and melt cinder (10); An iron notch (13) that is used for melt cinder (10) and liquid pig iron (9); Oxygen jet (8) in many shells (17) that are arranged on melt-down gasifier (1); , a circular line (15), it can be supplied to oxygen jet (8) through gas piping (16) around the shell (17) and the oxygen-containing gas of melt-down gasifier (1) from described pipeline; Article one, the intake line (14) that is used for oxygen-containing gas, its feeds in circular line (15), it is characterized in that, in these gas pipings (16), is provided with a setting device (21) that is used to regulate the volumetric flow rate of oxygen-containing gas.
8, melt-down gasifier as claimed in claim 7 (1) is characterized in that, in every gas piping (16), is provided with a setting device (21) that is used to regulate the volumetric flow rate of oxygen-containing gas.
As the described melt-down gasifiers in one of claim 7 or 8 (1), it is characterized in that 9, in these gas pipings (16), a nitrogen intake line (23) feeds in the gas piping (16) before or after setting device (21).
As the described melt-down gasifier of one of claim 7-9 (1), it is characterized in that 10, in these gas pipings (16), setting device (21) tightens the front that is connected on oxygen jet (8) at air flow line.
11, as the described melt-down gasifier of one of claim 7-10 (1), it is characterized in that, in these gas pipings (16), be provided with the pressure and/or the measuring apparatus (18) volumetric flow rate and that corresponding actual signal is provided to a control device (19) that are used to measure oxygen-containing gas, wherein can give from the external world at least pressure that control device (19) input is used for gas piping (16) and or the theoretical value (20) of volumetric flow rate, can relatively come to distinguish independently of one another regulating and controlling device (21) by control device (19) and according to theoretical value/actual value.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA1455/99 | 1999-08-24 | ||
| AT0145599A AT407994B (en) | 1999-08-24 | 1999-08-24 | METHOD FOR OPERATING A MELT-UP CARBURETTOR |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1382223A true CN1382223A (en) | 2002-11-27 |
Family
ID=3514286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00814552A Pending CN1382223A (en) | 1999-08-24 | 2000-07-20 | Method for operating gas generating furnace |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1212470A1 (en) |
| KR (1) | KR20020026264A (en) |
| CN (1) | CN1382223A (en) |
| AT (1) | AT407994B (en) |
| AU (1) | AU6565400A (en) |
| TW (1) | TW493005B (en) |
| WO (1) | WO2001014599A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101235252B1 (en) * | 2005-12-26 | 2013-02-20 | 주식회사 포스코 | Method for manufacturing molten irons by injecting a hydrocarbon gas and apparatus for manufacturing molten irons using the same |
| AT506042A1 (en) * | 2007-11-13 | 2009-05-15 | Siemens Vai Metals Tech Gmbh | METHOD FOR MELTING RAW IRONS AND STEEL PREPARED PRODUCTS IN A MELTING GASER |
| AT511738B1 (en) | 2011-07-21 | 2013-04-15 | Siemens Vai Metals Tech Gmbh | MELT REDUCTION AGGREGATE AND METHOD FOR OPERATING A MELT REDUCTION AGGREGATE |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR453552A (en) * | 1912-01-24 | 1913-06-11 | Carl Schnetzler | Toothpick |
| US1726298A (en) * | 1926-03-06 | 1929-08-27 | Freyn Engineering Co | Air distribution to furnaces |
| US2879056A (en) * | 1956-09-13 | 1959-03-24 | United States Steel Corp | System for supplying oxygen to blast furnace tuyeres |
| BE877174A (en) * | 1979-06-21 | 1979-12-21 | Centre Rech Metallurgique | METHOD OF CONDUCTING A TANK OVEN. |
| JPS60114511A (en) * | 1983-11-25 | 1985-06-21 | Sumitomo Metal Ind Ltd | Method for controlling flow rate of blast furnace |
| JPH062893B2 (en) * | 1986-03-28 | 1994-01-12 | 川崎製鉄株式会社 | Method for producing molten metal from powdered ore |
| JPS63153208A (en) * | 1986-12-15 | 1988-06-25 | Kawasaki Steel Corp | Production of molten iron from powdery iron ore |
| DE3733349A1 (en) * | 1987-10-02 | 1989-04-13 | Kloeckner Stahl Gmbh | Method and apparatus for melting down scrap, sponge-iron pellets or the like |
| DE3742156C1 (en) * | 1987-12-10 | 1988-10-13 | Korf Engineering Gmbh | Process for operating a melter gasifier and melter gasifier for carrying it out |
| JPH0293010A (en) * | 1988-09-30 | 1990-04-03 | Kawasaki Steel Corp | Method for removing sticking material at circumference of tuyere in smelting reduction furnace |
| FR2686406A1 (en) * | 1992-01-16 | 1993-07-23 | Doat Robert | Energy economiser device for conventional cupola furnaces, starting with an independent wind box (air chamber) and with controlled air flow rate in the (blast) pipes (nozzles) |
-
1999
- 1999-08-24 AT AT0145599A patent/AT407994B/en not_active IP Right Cessation
-
2000
- 2000-07-15 TW TW089114163A patent/TW493005B/en active
- 2000-07-20 CN CN00814552A patent/CN1382223A/en active Pending
- 2000-07-20 EP EP00953077A patent/EP1212470A1/en not_active Withdrawn
- 2000-07-20 KR KR1020027002249A patent/KR20020026264A/en not_active Application Discontinuation
- 2000-07-20 WO PCT/EP2000/006930 patent/WO2001014599A1/en not_active Application Discontinuation
- 2000-07-20 AU AU65654/00A patent/AU6565400A/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| AT407994B (en) | 2001-07-25 |
| WO2001014599A1 (en) | 2001-03-01 |
| EP1212470A1 (en) | 2002-06-12 |
| KR20020026264A (en) | 2002-04-06 |
| AU6565400A (en) | 2001-03-19 |
| TW493005B (en) | 2002-07-01 |
| ATA145599A (en) | 2000-12-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102057060B (en) | Process and device for producing pig iron or liquid steel precursors | |
| CN1197982C (en) | Pressure control | |
| CN1280199A (en) | Start method for directly smelting technology | |
| EP3084013B1 (en) | Method to operate a smelt cyclone | |
| US4755219A (en) | Process for producing molten pig iron or steel raw material | |
| EP2689041B1 (en) | Direct smelting process for high sulphur feed | |
| KR100276324B1 (en) | Melt reduction apparatus and method for manufacturing molten pig iron using the same | |
| KR930007308B1 (en) | Process for the production of liquid steel or pre-pig iron | |
| US8361190B2 (en) | Process and apparatus for producing sponge iron | |
| CN1382223A (en) | Method for operating gas generating furnace | |
| RU2008125844A (en) | INSTALLATION FOR OBTAINING MELTED IRON | |
| AU2012286121B2 (en) | Melting reduction assembly and method for operating a melting reduction assembly | |
| KR100431863B1 (en) | Apparatus for cleaning dispersion plate in fluid-bed reducing furnace | |
| EP2202323A1 (en) | Vertical furnace | |
| JP4307686B2 (en) | Raw material supply apparatus and reduced iron manufacturing method | |
| CN112725619A (en) | Blast furnace dust removal ash processing apparatus | |
| EP0796918A1 (en) | Method of charging scrap and coke materials into cupola | |
| KR200282937Y1 (en) | Charge discharge device in the center of reduction furnace_ | |
| AU731008B2 (en) | Method of producing molten pig iron or steel pre-products from ore | |
| KR20010057419A (en) | Device for controlling the discharging height of fine particles in fluidized bed reactor | |
| CN118240983A (en) | Stable operation method of blast furnace at end of furnace service | |
| RU2147037C1 (en) | Process of blast-furnace melting | |
| JPH07138630A (en) | Device for charging powdery and granular material in metal refining furnace and charging lance | |
| JPH05125412A (en) | Method for injecting powdery and granular materials from tuyere in vertical type furnace | |
| RU2237725C1 (en) | Method of charging blast furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |