EP2922977A1 - Blasverfahren und vorrichtung zur stahlherstellung unter nutzung von strahlen von heissluft - Google Patents
Blasverfahren und vorrichtung zur stahlherstellung unter nutzung von strahlen von heissluftInfo
- Publication number
- EP2922977A1 EP2922977A1 EP13799236.8A EP13799236A EP2922977A1 EP 2922977 A1 EP2922977 A1 EP 2922977A1 EP 13799236 A EP13799236 A EP 13799236A EP 2922977 A1 EP2922977 A1 EP 2922977A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hot air
- jets
- nozzles
- nozzle
- pig 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.)
- Granted
Links
- 238000007664 blowing Methods 0.000 title claims abstract description 41
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 27
- 239000010959 steel Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims description 77
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 229910000805 Pig iron Inorganic materials 0.000 claims description 57
- 230000008569 process Effects 0.000 claims description 39
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 37
- 229910052760 oxygen Inorganic materials 0.000 claims description 37
- 239000001301 oxygen Substances 0.000 claims description 37
- 238000002347 injection Methods 0.000 claims description 36
- 239000007924 injection Substances 0.000 claims description 36
- 230000002093 peripheral effect Effects 0.000 claims description 18
- 239000000446 fuel Substances 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 52
- 229910052742 iron Inorganic materials 0.000 abstract description 26
- 238000005507 spraying Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 33
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 24
- 238000002485 combustion reaction Methods 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 12
- 239000003345 natural gas Substances 0.000 description 12
- 238000007670 refining Methods 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000155 melt Substances 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000002893 slag Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000009628 steelmaking Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 238000000071 blow moulding Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 239000013598 vector Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- 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
- C21C5/305—Afterburning
-
- 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
- C21C5/32—Blowing from above
-
- 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
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4606—Lances or injectors
-
- 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
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
-
- 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
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
- F27D2003/162—Introducing a fluid jet or current into the charge the fluid being an oxidant or a fuel
- F27D2003/163—Introducing a fluid jet or current into the charge the fluid being an oxidant or a fuel the fluid being an oxidant
-
- 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
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
- F27D2003/168—Introducing a fluid jet or current into the charge through a lance
- F27D2003/169—Construction of the lance, e.g. lances for injecting particles
-
- 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
- F27D99/00—Subject matter not provided for in other groups of this subclass
- F27D99/0001—Heating elements or systems
- F27D99/0033—Heating elements or systems using burners
- F27D2099/0046—Heating elements or systems using burners with incomplete combustion, e.g. reducing atmosphere
- F27D2099/0048—Post- combustion
Definitions
- the present application relates to processes for making steel by refining using blast of hot air in suitable converters.
- blowing process a pig iron melt is refined by means of gaseous oxygen or air as a freshing agent. In this case, heat is released, which keeps the temperature of the melt above its solidification point.
- blowing methods are known in the art, depending on how the refreshing agent is fed into or on the pig iron melt - for example, inflation and bottom blowing methods and methods in which both inflated as well as blown - called, for example, combined blowing process.
- the molten pig iron may consist of, for example, pig iron and scrap and / or other solid iron carriers or be obtained. Heat for melting solid starting materials is usually supplied primarily by the oxygen-induced oxidation processes in the melt.
- a converter is understood to mean a vessel for carrying out a blowing process.
- blowing processes there are also fresh hearth processes, which are not refined as in blowing process by supplying air or gaseous oxygen as a fresh agent.
- Agent for the oxidation of accompanying elements in a molten pig iron is supplied from added scrap and ore.
- converter are in the context of this application meant no vessels for carrying out fresh hearth processes; For example, the term hearth furnace exists for such vessels.
- converter does not mean vessels for carrying out electrical steel processes; for such vessels, for example, the term electric furnace or electric arc furnace exists.
- additional energy can be introduced into the fresh process if the reaction gases - for example carbon monoxide CO - are post-combusted by hot air jets directed at the bath.
- the scrap set can thus be increased from approx. 230 kg / t steel to 430 kg / t steel.
- Oxygen floor nozzles to introduce
- the present invention is based on the surprising finding that in a converter for oxygen inflation, that is to say bubbles without bottom nozzles, reactions can definitely take place by which the transfer of energy to the iron bath from the afterburning of reaction gases by hot air jets can be explained.
- Blowing process for steel production in converters from a pig iron melt characterized in that
- At least one jet of hot air is injected into the converter space above the pig iron melt from at least one nozzle of at least one injection device onto the pig iron melt,
- the hot air is blown onto the raw iron bath under certain conditions.
- good conditions arise when there is a pressure difference of 0.05-0.0 MPa between the inlet into the nozzle and the exit from the nozzle for the hot air emerging as the jet.
- the pressure should be higher when entering the nozzle than at the outlet.
- the hot air supplied to the nozzle should have a pressure at entry into the nozzle which is 0.05 to 1 MPa higher.
- nozzle is meant a component that makes a jet of hot air supplied to the nozzle; this is done by narrowing the channel through which the hot air flows. For example, it may be a venturi.
- Blowing process for steel production in converters from a pig iron melt which is characterized in that
- the formation of droplets by the jets is spread over a larger area, which facilitates the deposition of the droplets before and thus the elimination of their leaving the converter.
- the multiple jets of hot air are to be arranged so that they do not flow into each other by mutual suction before they reach the pig iron melt.
- a lance can, for example, be injected by means of a lance as an injection device which has one or more nozzle openings, from which one or more jets emerge.
- one or more jets of hot air can also be injected from one or more side nozzles in the converter mouth as injection devices. Or several rays from both lance and side nozzle.
- Blowing process for steel production in converters from a pig iron melt which is characterized in that
- the jets travel a run length from the exit of the injection device until impacting the molten pig iron, the jets leaving the injection device at a distance of at least 0.03 - 0.05 times the run length.
- the maximum feasible distance is given by the boundary conditions under which the method is performed. For example, if injected by means of a lance as Eindüsvorraum, then the dimensions of the lance are limiting for the maximum feasible distance.
- the hot air is thus blown according to the invention under certain conditions to the crude iron bath.
- a jet of hot air must therefore be blown onto the bath surface in such a way that a deflection of the flow takes place in the direction of the converter wall, wherein the droplets entrained and deposited in the deflection of the flow on the converter wall by the centrifugal force.
- the jet should not penetrate too deep into the bath of raw molten iron, because otherwise a backflow takes place in the bath, which is directed more upward and thus iron droplets are discharged with the flow through the converter mouth, so not enough by a deflection of the flow at the Converter wall are deposited.
- the jet does not accelerate the droplets parallel to the surface of the molten pig iron high enough to largely separate them when the flow direction on the side wall of the converter changes, some of the droplets remain in the gas flow and are discharged with the hot gas.
- the temperature of the hot air is 800 ° C to 1600 ° C. Under hot air is thus 800 - 1600 ° C hot air to understand in the context of this application; optionally enriched to an increased oxygen content as indicated below.
- a temperature range of 800 ° C to 1400 ° C is advantageous, a temperature range of 1000 ° C to 1400 ° C is particularly advantageous. This temperature range is technically easy to master and brings a high thermal efficiency.
- the rays should strike the bath of pig iron melt as individual rays, and not unite before. According to a preferred embodiment, there are at least 3 rays.
- the jets are directed away from each other, with the directions of the jets forming an angle of at least 6 ° with each other.
- the jets are directed upon exiting the injection device, that is, they have a main direction of movement that can be represented by a vector.
- the angle exists between these vectors of two rays.
- the upper limit for the angle is given by the fact that the rays of hot air should not hit the lining on the edge of the converter, but on the bath in the converter - and still enough space left to form the direction of the beam towards the edge.
- the diameter of the jets when leaving the Eindüsvorraum is 0.01 to 0.05 times the run length.
- the distance between a plurality of jets when leaving the injection device at least their diameter when leaving the Eindüsvorraum.
- leaving the injection device is meant leaving the respective nozzle of the injection device.
- the rays are directed so that the directions of the rays with the vertical enclose an angle of at least 6 °.
- a central jet is provided, which is directed perpendicular to the pig iron melt.
- peripheral rays are present in addition to the central ray, the directions of the peripheral rays including the direction of the central ray being at an angle of at least 6 °, and preferably at least 8 °. The upper limit for the angle is given by the fact that the peripheral rays of hot air should not hit the lining on the edge of the converter, but on the bath in the converter - and still enough space left to form the direction of the beam towards the edge.
- this is achieved in that the central jet generates more droplets than the peripheral rays - and these droplets are then pressed by means of the peripheral rays on the pig iron melt.
- the peripheral beams are arranged symmetrically about the central beam.
- the diameter of the central jet at the exit from the injection device is at least the diameter of a peripheral jet of hot air. It can also be larger, so be a stronger beam.
- a further nozzle is mounted in the center of the arrangement according to the invention, which blows perpendicular to the bath surface.
- This nozzle should be at least as large as the peripheral nozzle according to the invention, but then must be directed at least by 8 ° to the outside.
- the effect of the advantageous nozzle combination can probably be explained by the fact that an additional droplet formation takes place through the central hot air jet, which then intensifies the mode of action of the peripheral nozzles.
- fuel is supplied to at least one jet.
- further energy can be introduced into the steelmaking process if fuel is added to the jet of hot air, preferably hydrocarbon, more preferably natural gas.
- fuel is added to the jet of hot air, preferably hydrocarbon, more preferably natural gas.
- Optimum values are achieved when so much natural gas is added that about 20-40% of the oxygen contained in the jet of hot air is used for the combustion of natural gas. This value is based on full combustion of natural gas, that is, according to the invention, about 5 Nm 3 of natural gas per 100 Nm 3 of non-oxygen-enriched hot air are added.
- the fuel may also be coal dust, for example.
- the hot air is enriched with oxygen, preferably up to 40%.
- a particularly important application of the invention relates to the increase of
- Converters are completely burned with air, which significantly increases the amount of exhaust gas.
- H When converting from conventional converters to a process With HippoLitenachverbrennung the capacity of existing exhaust treatment plants then limits the conversion of an existing converter to the new process.
- Optimal values are achieved when 30 - 50% of the oxygen contained in the hot air is burnt with natural gas.
- the blowing method is an inflation method, wherein in a first phase of the fresh process, the plurality of jets of hot air are injected into the converter space above the molten pig iron from at least one injection device to the molten pig iron, and
- the at least one injection device is arranged in the upper region of the converter; it includes hot air nozzles, through which the hot air is injected into jets; For example, it is a hot air lance, which is removed after the first phase.
- the jets of hot air are rougher on the bath in the converter Directed iron melt.
- the mixture is refined with an oxygen lance.
- the time distribution over the two phases depends on how much energy is to be additionally introduced into the converter process. If, for example, when refining pig iron, the scrap rate should only be increased by 5 percentage points, for example from 230 kg scrap / t steel to 280 kg scrap / t steel, it is sufficient if 20% of the required amount of oxygen is blown by blasting hot air become. In order to optimally use the increase in the scrap set, about 80% of the oxygen is inflated by hot air and the remaining 20% exclusively by oxygen at the end of the refining process. For this purpose, the hot air nozzles are moved out and the melt with oxygen in the usual way to finish. In this example, e.g. an increase in the scrap rate of 230 kg / t steel to 390 kg / t steel achieved. The inflation of oxygen at the end of the process is necessary to achieve the necessary steel quality.
- an oxygen replenisher converter additional energy is added to increase the scrap rate by blowing only hot air in a first phase of the refining process and only oxygen in a second phase of the refining process.
- Energy input is significantly increased by adding natural gas, for example, to the jet of hot air.
- the first example relates to the production of steel from pig iron and scrap in an oxygen-blowing converter with a melting capacity of 100 t, which is operated according to the present invention at the beginning of the fresh process with hot air jets.
- 900 kg of pig iron and 180 kg of scrap were charged into the converter to produce one tonne of steel.
- the scrap rate is increased to 350 kg / t steel.
- the degree of post-combustion is 55%.
- a maximum of 35,000 Nm 3 / h can be recorded in the existing exhaust gas detection system.
- the use of hot air instead of oxygen prolongs the given limit Amount of exhaust gas the melting time of 20 min. to 25 min., In addition, the exhaust gas can not be recycled.
- the blowing time is 18 min at a hot air blow rate of 32,000 Nm 3 / h.
- the meltable scrap quantity increases to 400 kg / t steel, whereby 14 min. long with hot air and the remaining 4 min. was freshened up with oxygen bloat.
- the degree of post-combustion is again 60%, but now there is a gas that is so high in calorific value that it can be detected in conventional converter exhaust systems.
- the hot air inflation is stopped after 80% of the melting time and the melt is finished with the help of the oxygen blowing lance.
- the blowing process is a bottom blowing process.
- the opening for the reaction gases or exhaust gases is above the spray zone formed by bottom-blowing nozzles.
- the hot air is used for the afterburning of the reaction gases.
- the jets of hot air are preferably blown through nozzles whose diameter is 0.01 to 0.03 times the run length of the jets of hot air.
- the distance between the nozzle openings is at least as large as the nozzle diameter.
- the individual nozzles are directed at least 8 ° outwards.
- the opening for the jets of hot air is within the converter mouth.
- the inventive method is used in a bottom-blowing converter.
- a considerable amount of energy is present, which by post combustion with hot air in the
- the scrap set, the bottom-blowing Converters operating without post-combustion are at about 200 kg / t steel, increasing by about 200 kg / t steel.
- approximately 700 kg / pig iron / t steel and 400 kg scrap / t steel are charged into a 60 t converter.
- About bottom nozzles is refined in the usual way with oxygen at a blowing rate of 6000 Nm3 / h and simultaneously inflated by a retracted into the converter mouth hot air lance with a blowing rate of 30,000 Nm3 / h hot air, which is enriched to an oxygen content of 30%.
- the run length of the jets of hot air is 3.5 m.
- the jets of hot air emerge from three nozzle openings each 13 cm in diameter, which are arranged at a distance of 15 cm in the hot air lance out.
- the rays are inclined at least 8 ° outwards from the vertical.
- steel is produced under the same conditions as in the first example of a bottom blowing process in a 250t converter.
- the run length of the jets of hot air is 5 m.
- the hot air blowing rate is 80000 Nm3 / h.
- the hot air lance has five nozzle openings each 15 cm in diameter.
- the distance between the nozzles is 17 cm.
- the nozzles are arranged in a circle in the lance, the nozzles having a distance of 20 cm to the center of the lance and each 20 cm between the nozzles.
- the direction of the rays is directed at least 8 ° outwards.
- the hot air lance has a diameter of about 70 cm.
- Another object of the present application is an apparatus for carrying out a method according to the invention, comprising a Eindüsvorraum suitable for injection of jets of hot air into a converter space above a molten pig iron in the converter wherein the jets of hot air leaving the injection device through nozzles, characterized in that the nozzle openings the nozzles are at a distance from each other which is at least 0.03 - 0.05 times the run length.
- jets of hot air emerging from the nozzle orifices would flow into a jet as each jet draws gas from its surroundings.
- the individual beams must therefore have a minimum distance in order not to flow together.
- the rays then impinge as discrete rays on the bath of raw molten iron.
- a given amount of hot air is well distributed during injection, which causes a better afterburning of reaction gases.
- droplet formation is distributed over several locations, making it easier to avoid the discharge of droplets.
- the longitudinal axes of the nozzles enclose an angle of at least 6 ° with each other.
- the nozzles have longitudinal axes that enclose an angle of at least 6 ° with each other. This reduces the risk of multiple jets merging.
- the distance of the nozzle openings from each other is at least as large as the diameter of the nozzle openings.
- a central nozzle is present. From this, a jet of hot air can be directed perpendicular to the pig iron melt.
- peripheral nozzles are provided in addition to the central nozzle, wherein the longitudinal axes of the peripheral nozzles with the longitudinal axis of the central nozzle at an angle of at least 6 °, and preferably at least 8 ° include.
- the injection device is a hot air lance, so a lance suitable for the injection of hot air.
- the injection device is preferably positioned so that in the presence of several rays, the jets of hot air in the converter mouth exit from it - ie not outside the converter. If only one jet is present, which is directed, for example, according to the method of the invention from a hot air lance in the direction of the extension of its longitudinal axis on the molten pig iron, it may also outside of the converter mouth - ie outside the converter - emerge from her.
- the nozzle openings are the ends of the nozzles from which jets of hot air emerge.
- FIG. 1 shows schematically an inventive inflation method in the first phase.
- FIG. 2 shows schematically a bottom blowing method according to the invention.
- FIG. 3 shows an arrangement of nozzles in a nozzle head.
- Figure 4 shows another arrangement of nozzles in a nozzle head.
- Figure 5 shows a blowing process with a central jet of hot air.
- FIG. 1 shows schematically an inventive inflation method in the first phase of the refining process.
- Several jets of hot air represented by corrugated arrows are injected from a hot air lance 1 in the converter space 2 on the pig iron melt 3.
- the pig iron melt 3 is located in the converter 4.
- FIG. 2 shows schematically a bottom blowing method according to the invention.
- Several jets of hot air represented by corrugated arrows are injected from a hot air lance 5 in the converter space 6 above the pig iron melt 7.
- the pig iron melt 7 is located in the converter 8.
- oxygen is introduced into the pig iron melt 7 for refining.
- FIG. 3 shows how, in the case of a hot air lance injection device, the nozzles are arranged relative to one another in a nozzle head with three nozzles. The angle between the intersecting, dashed longitudinal axes of the nozzles is 8 °.
- FIG. 4 shows an arrangement with a hot air lance injection device, in which a central nozzle and 3 peripheral nozzles are present in the nozzle head.
- the longitudinal axes of the peripheral nozzles enclose with the longitudinal axis of the central nozzle an angle of 8 °, represented by a peripheral nozzle and the central nozzle with dashed longitudinal axes.
- FIG. 1 and FIG. 2 a plurality of jets of hot air emerge from the injection device in the converter mouth.
- FIG. 5 shows how a jet emerges from the hot air lance 10 through a corrugated arrow in the direction of the extension of the longitudinal axis of the hot air lance 10 outside the converter 11.
- the hot air lance has a vertical longitudinal axis, so the jet of hot air exits vertically.
- FIG. 5 is suitable for an inflation method or a bottom-blowing method.
- composition of a molten metal in the converter changes in the course of the process.
- pig iron melt is meant the molten metal in the converter during the whole course of the refining.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012022703 | 2012-11-21 | ||
PCT/EP2013/074330 WO2014079907A1 (de) | 2012-11-21 | 2013-11-21 | Blasverfahren und vorrichtung zur stahlherstellung unter nutzung von strahlen von heissluft |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2922977A1 true EP2922977A1 (de) | 2015-09-30 |
EP2922977B1 EP2922977B1 (de) | 2018-06-13 |
Family
ID=49709633
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13799236.8A Active EP2922977B1 (de) | 2012-11-21 | 2013-11-21 | Blasverfahren und vorrichtung zur stahlherstellung unter nutzung von strahlen von heissluft |
Country Status (6)
Country | Link |
---|---|
US (1) | US20150292050A1 (de) |
EP (1) | EP2922977B1 (de) |
KR (1) | KR20150086363A (de) |
CN (1) | CN105008553A (de) |
IN (1) | IN2015DN03809A (de) |
WO (1) | WO2014079907A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101798844B1 (ko) * | 2016-09-02 | 2017-11-17 | 주식회사 포스코 | 랜스 및 이를 이용한 조업 방법 |
CN110527778B (zh) * | 2019-09-29 | 2021-10-26 | 山东钢铁股份有限公司 | 一种大型高性能炼钢转炉结构 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1467158A (fr) * | 1965-12-14 | 1967-01-27 | Siderurgie Fse Inst Rech | Dispositif de réglage de débit de gaz |
CN201660655U (zh) * | 2010-02-08 | 2010-12-01 | 鞍钢股份有限公司 | 转炉高效氧枪喷头 |
DE102011006876A1 (de) * | 2011-04-06 | 2012-10-11 | Sms Siemag Ag | Verfahren zum Betrieb mindestens einer Überschalldüse in einem metallurgischen Gefäß, Verfahren zur Ermittlung eines Druckverlusts, sowie System zum Ermitteln von Betriebsparametern mindestens einer Überschalldüse |
KR101172900B1 (ko) * | 2011-04-11 | 2012-08-10 | 주식회사 포스코건설 | 전로 고온공기 분사장치 |
-
2013
- 2013-11-21 KR KR1020157016374A patent/KR20150086363A/ko not_active Application Discontinuation
- 2013-11-21 CN CN201380060939.0A patent/CN105008553A/zh active Pending
- 2013-11-21 EP EP13799236.8A patent/EP2922977B1/de active Active
- 2013-11-21 WO PCT/EP2013/074330 patent/WO2014079907A1/de active Application Filing
- 2013-11-21 US US14/646,064 patent/US20150292050A1/en not_active Abandoned
-
2015
- 2015-05-05 IN IN3809DEN2015 patent/IN2015DN03809A/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2014079907A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN105008553A (zh) | 2015-10-28 |
WO2014079907A1 (de) | 2014-05-30 |
US20150292050A1 (en) | 2015-10-15 |
EP2922977B1 (de) | 2018-06-13 |
IN2015DN03809A (de) | 2015-10-02 |
KR20150086363A (ko) | 2015-07-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DD140757A5 (de) | Verfahren zur verbesserung der waermebilanz beim stahlfrischen | |
DE2737832B2 (de) | Verwendung von im Querschnitt veränderlichen Blasdüsen zur Herstellung von rostfreien Stählen | |
DE2525355A1 (de) | Verfahren und vorrichtung zum frischen von eisen | |
EP2922977B1 (de) | Blasverfahren und vorrichtung zur stahlherstellung unter nutzung von strahlen von heissluft | |
DE60131426T2 (de) | Verfahren und vorrichtung zur direkterschmelzung | |
DD151077A5 (de) | Verfahren zur herstellung von stahl | |
DE3019899C2 (de) | Verfahren zur Herstellung von Kohlenstoffstahl und niedriglegiertem Stahl in einem basischen Sauerstoffofen und Vorrichtung zur Durchführung des Verfahrens | |
DE2157653B2 (de) | Verfahren zur Granulierung einer schmelzflussigen Mischung von Phosphor ofenschlacke und Ferrorphosphor | |
EP2215418B1 (de) | Verfahren zum herstellen und schmelzen von flüssigem roheisen oder flüssigen stahlvorprodukten in einem einschmelzvergaser | |
DE10317195B4 (de) | Verfahren zur Verbesserung der Energiezufuhr in ein Schrotthaufwerk | |
EP0236868B1 (de) | Verfahren zur Stahlherstellung aus Schrott | |
WO2014064193A1 (de) | Verfahren und vorrichtung zur energiezufuhr in ein schrotthaufwerk in einem elektrolichtbogenofen | |
DE3105999C2 (de) | Bodendüse für einen Sauerstoff-Aufblas-Konverter | |
DE2834173A1 (de) | Verfahren und vorrichtung zur kontinuierlichen behandlung von schmelzfluessigen, schwefelhaltigen schlacken | |
DE2237253A1 (de) | Verfahren und vorrichtung zum einblasen pulverigen materials in ein bad aus fluessigem metall | |
DE102010020179A1 (de) | Verfahren zum Betreiben eines Bodenspülsystems eines BOF-Konverters | |
AT235878B (de) | Verfahren und Blasdüse zum Frischen von phosphorreichen Roheisen, insbesondere Thomasroheisen, durch Aufblasen von praktisch reinem Sauerstoff auf die Oberfläche des Roheisenbades | |
AT224147B (de) | Verfahren zur Herstellung von Vormetall oder Stahl aus phosphorhaltigem Roheisen | |
AT242257B (de) | Verfahren und Vorrichtung zur Herstellung hochfeinteiliger Bleioxyde, insbesondere Bleiglätte | |
AT255461B (de) | Verfahren und Frischgefäße zur Umwandlung von Roheisen in Stahl | |
DE1458877C (de) | Kontinuierliches Windfnsch Ver fahren und Vorrichtung hierfür | |
AT119466B (de) | Blasformen zur Einführung des Gebläsewindes in Hochöfen. | |
DE895460C (de) | Verfahren zum Herstellen von Stahl durch Frischen von Roheisen im Vorherd eines Schachtofens | |
DE2040824C2 (de) | Verfahren zur Verhinderung der Entwicklung von braunem Rauch beim Frischen von Roheisen in einem bodenblasenden Konverter | |
DE977271C (de) | Verfahren zum Behandeln von Metall-, vornehmlich von Eisenschmelzen |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20150409 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
DAX | Request for extension of the european patent (deleted) | ||
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: C21C 5/32 20060101ALI20180130BHEP Ipc: F27D 99/00 20100101ALI20180130BHEP Ipc: C21C 5/35 20060101AFI20180130BHEP Ipc: F27D 3/16 20060101ALI20180130BHEP Ipc: C21C 5/30 20060101ALI20180130BHEP Ipc: C21C 5/46 20060101ALI20180130BHEP |
|
INTG | Intention to grant announced |
Effective date: 20180221 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP Ref country code: AT Ref legal event code: REF Ref document number: 1008574 Country of ref document: AT Kind code of ref document: T Effective date: 20180615 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: GERMAN |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 502013010403 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20180613 |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG4D |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180913 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180613 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180613 Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180913 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180613 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180613 Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180613 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180613 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180613 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180914 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180613 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180613 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180613 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20181013 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180613 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180613 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180613 Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180613 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180613 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 502013010403 Country of ref document: DE |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20190314 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180613 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180613 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20181121 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20181121 Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180613 |
|
REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20181130 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: MM4A |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20181130 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20181130 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20181130 Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20181121 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180613 Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20181130 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20181121 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180613 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180613 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180613 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MK Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180613 Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO Effective date: 20131121 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20231124 Year of fee payment: 11 Ref country code: DE Payment date: 20231121 Year of fee payment: 11 Ref country code: AT Payment date: 20231121 Year of fee payment: 11 |