EP2882876A1 - Hot blast lance with a nozzle brick arranged at the hot blast outlet - Google Patents
Hot blast lance with a nozzle brick arranged at the hot blast outletInfo
- Publication number
- EP2882876A1 EP2882876A1 EP13737535.8A EP13737535A EP2882876A1 EP 2882876 A1 EP2882876 A1 EP 2882876A1 EP 13737535 A EP13737535 A EP 13737535A EP 2882876 A1 EP2882876 A1 EP 2882876A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hot blast
- nozzle
- hot
- lance
- blast lance
- 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
- 239000011449 brick Substances 0.000 title abstract 4
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 16
- 239000010959 steel Substances 0.000 claims abstract description 16
- 238000010310 metallurgical process Methods 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 239000004575 stone Substances 0.000 claims description 37
- 238000001816 cooling Methods 0.000 claims description 18
- 239000002826 coolant Substances 0.000 claims description 8
- 239000000155 melt Substances 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 5
- 230000000295 complement effect Effects 0.000 claims description 4
- 230000000284 resting effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 229910000601 superalloy Inorganic materials 0.000 claims description 2
- 239000000161 steel melt Substances 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 11
- 239000001301 oxygen Substances 0.000 description 11
- 229910052760 oxygen Inorganic materials 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 239000007789 gas Substances 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 241000271510 Agkistrodon contortrix Species 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 241000251730 Chondrichthyes Species 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- C21C5/48—Bottoms or tuyéres of converters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/22—Arrangements of air or gas supply devices
- F27B3/225—Oxygen blowing
-
- 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
Definitions
- the invention relates to a hot blast lance with a hot stone outlet arranged nozzle block for use in metallurgical processes, such as in the
- Supply of the oxygen can be done by bottom blowing and / or by blowing.
- bottom blowing the converter in the bottom area on one or more special floor nozzles, through which the oxygen is supplied.
- the oxygen is introduced by means of a lance.
- Converter with oxidizing gases are burned. The resulting heat is transferred to the melt.
- oxygen and / or fuels are supplied via bottom nozzles.
- Hot air source can be generated efficiently, if here a so-called Pebble Heater is used.
- the pebble heater in itself, as an embodiment of a
- the hot air must then be conveyed from the hot air outlet of the pebble heater to the tip of the lance, to be blown from there into a metallurgical reaction vessel.
- the present invention has for its object to enable the introduction of hot blast in a metallurgical vessel, such as bspwnden converter, in an efficient manner.
- the task is at a
- Hot blast outlet arranged nozzle stone according to the invention achieved by the characterizing features of claim 1.
- the nozzle block is provided with at least one H effetwindaustrittsdüse, and is replaceable, and rests on the hot air outlet on a support ring.
- the hot blast has a temperature of 500 ° C to 1,400 ° C, advantageously 1,200 ° C.
- Jet velocity at the exit of the jet from the lance in the range from 250 m / s to 600 m / s,
- Nozzle diameter at the lance tip is.
- Reactor usually measured at the handled in the reactor batch or Abstichmati. Accordingly, the geometric dimensions of the reactor vessel grow much slower than the batch or tapping weight handled in the reactor.
- Outlet opening of the hot blast jet can no longer dissipate its initial pulse inside the reaction vessel until it reaches the bath surface far enough. From a certain reactor size, it may therefore be necessary, the hot blast into several beams
- Afterburning can be used in the converter.
- incoming hot blast placed in front of the nozzle tip nozzle channel is substantially parallel to the lance axis.
- the nozzle channels of at least two nozzles should run obliquely to the longitudinal axis of the hot blast lance.
- the hot blast is discharged from the nozzle with a twist and moves "helically M from above onto the steel bath.
- the nozzle block contains more than one, preferably three nozzles. In the case of only one nozzle, this has substantially in the direction of the longitudinal axis of the
- Hot blast lance If there are several nozzles, make sure that the nozzle channels have a minimum angle of preferably 11 ° to each other. This refinement is based on the knowledge that the run length of the jet is related to the nozzle diameter. By the hot air exiting through a plurality of nozzles, which are each reduced in diameter over a larger nozzle, thereby the run length of the individual beams is reduced.
- the nozzle block contains three nozzles, the nozzle channel longitudinal axes are inclined to the longitudinal axis of the hot blast lance so that they do not intersect.
- nozzle channel longitudinal axes are approximately in the direction of the longitudinal axis of the hot blast lance, but only so that they do not intersect, that is. So pass by. This causes an additional tilting of the nozzle channel longitudinal axes, so that they ultimately generate a swirl when exiting the hot blast.
- the nozzle block may also have more than three nozzles.
- the nozzles are oriented such that the longitudinal axes of two nozzles form an angle greater than 20 °.
- This embodiment is related to the knowledge that the rays emerging from the nozzles have a certain opening angle. Furthermore, the rays generate a due to their flow in the edge region
- Negative pressure through which gaseous particles are drawn into the flow which are located in this edge region. If two hot air flows are too close to each other, the two hot air flows attract because of the negative pressure and combine to form a stream.
- nozzle stone made of a refractory material or even from a
- microstructures may, for example, take the form of
- Hot blast outlet surface is convex.
- the radius of curvature of the convex hot-air outlet surface is dimensioned such that the inclined longitudinal axis of the nozzle channel or the inclined longitudinal axes of the nozzle channels approximately at the radius of convex hot blast outlet surface of the nozzle block
- the hot blast lance is provided there with a separate or integrated on an inner tube of the hot blast lance arranged support ring, the nozzle stone at the open end of the hot blast lance as
- Cooling channel system of the nozzle block is connected in a fluid-tight manner. In this way, effective cooling of the nozzle stone results, which leads to a significant increase in the service life.
- the nozzle stone be provided on the in the intended use position for molten bath or steel bath side facing with a shield, which the nozzle stone with
- This shielding could be understood as a kind of protective goggle which protects the nozzle block as such against temperature radiation, i. covers, while leaving the nozzle openings free. This ensures that the material of the nozzle stone is very well protected against the high temperature radiation, without the nozzles being disturbed in terms of flow.
- the shielding is provided with a cooling channel system which can be charged with coolant. This has the advantage that you have the
- Nozzle stone as such no longer has to cool. This in turn has the advantage that the blown hot blast virtually no or hardly any thermal energy is withdrawn.
- the nozzle block consists of at least two parts, i. two or more parts is formed, and that the parts are formed so that they are in
- the nozzle channels are formed at least on the inlet side of the
- Hot wind have a different contour from the round cross-section. Examples of this are described and illustrated below. Thus, according to the invention, the use of a
- Hot blast lance according to one of claims 1 to 10 for blowing hot blast above a steel bath or above a scrap heap / heap in one
- Converter incoming hot air is imprinted a component of movement in the horizontal direction. This advantageously increases the run length of the
- Hot air jet in the converter atmosphere In a corresponding embodiment of the geometry can be achieved in that the hot blast in the
- Figure 1 perspective sectional view of the lower part of a hot blast lance
- Figure 1 shows a perspective sectional view of the lower end of the hot blast lance. It is also closed
- This support ring can also be integral
- gas-dynamic velocities produced a uniform tight contact pressure down on the support ring.
- the uniform contact pressure on the support ring is generated by the outer contour of the nozzle block.
- FIG. 3 shows various embodiments of the nozzle block.
- the upper part of the picture shows an embodiment with only one centric nozzle channel.
- the lower illustration shows a nozzle stone with also three nozzle channels. Here, however, is the
- the nozzle channels do not have a round cross section on the hot air inlet side into the nozzle block. This cross-section can continue downwards, even in a curved nozzle channel guide, to the lower hot blast exit surface.
- the nozzle stone itself in the hot blast lance according to the present invention may therefore be a ceramic stone, or consist of a temperature-resistant steel alloy or consist of a water-cooled copper head.
- Figure 4 shows three representations for different
- the picture above shows a nozzle stone 1 at the lower end of a Heiwindlanze 3, with an integrated
- Cooling duct system 6 This cooling duct system 6 of the
- Nozzle block 1 is connected to the cooling duct system
- Hot blast lance 3 connected in a coolant-tight manner.
- the exchangeable nozzle block at the lower end of the hot blast lance is welded to the Heinlyn lance, such that the cooling channels of the hot blast lance are connected in a coolant-tight manner with the cooling channels of the nozzle block.
- the middle part of Figure 4 shows a variant in the nozzle block 1 at the in the molten bath
- a bspw ceramic or cooled metallic shield 5 which covers the nozzle stone as far as possible but leaves the nozzle openings. This gives the nozzle stone a very
- the lower part of the picture represents an embodiment showing the nozzle block 1 in a multi-part embodiment.
- the individual parts of the nozzle block are in turn so
- Figure 5 shows again in a perspective
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012016142A DE102012016142B3 (en) | 2012-08-08 | 2012-08-08 | Hot blast lance with a nozzle block arranged at the hot blast outlet |
PCT/EP2013/001826 WO2014023373A1 (en) | 2012-08-08 | 2013-06-20 | Hot blast lance with a nozzle brick arranged at the hot blast outlet |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2882876A1 true EP2882876A1 (en) | 2015-06-17 |
EP2882876B1 EP2882876B1 (en) | 2017-05-10 |
Family
ID=48794031
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13737535.8A Not-in-force EP2882876B1 (en) | 2012-08-08 | 2013-06-20 | Hot blast lance with a nozzle brick arranged at the hot blast outlet |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2882876B1 (en) |
DE (1) | DE102012016142B3 (en) |
WO (1) | WO2014023373A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112857053A (en) * | 2020-12-31 | 2021-05-28 | 东北大学 | Nozzle arrangement for a bottom-blowing lance of a metallurgical plant and use thereof |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3201104A (en) * | 1962-08-21 | 1965-08-17 | Walter V Berry | Oxygen lance for subsurface use |
DE3322556A1 (en) * | 1983-06-23 | 1985-01-10 | Didier-Werke Ag, 6200 Wiesbaden | Lance for blowing fluidised materials into molten metal |
DE3841708C1 (en) | 1988-12-10 | 1989-12-28 | Kloeckner Cra Patent Gmbh, 4100 Duisburg, De | |
DE4343957C2 (en) * | 1993-12-22 | 1997-03-20 | Tech Resources Pty Ltd | Converter process for the production of iron |
JPH08311524A (en) * | 1995-05-11 | 1996-11-26 | Nippon Steel Corp | Method for shutting off heat to lance nozzle for blowing in converter |
DE19744387C1 (en) | 1997-10-08 | 1999-04-29 | Atz Evus Applikations & Tech | Device for reducing stress in bulk flow regenerators with radial flow |
DE10102854C2 (en) * | 2001-01-23 | 2002-11-28 | Impact Ges Fuer Nichteisenmeta | Lance head for an oxygen lance |
GB0128878D0 (en) * | 2001-12-03 | 2002-01-23 | Boc Group Plc | Metallurgical lance and apparatus |
CN101184854B (en) * | 2006-01-04 | 2011-04-13 | 萨斯特股份公司 | Method for pre-heating iron agglomerates |
AT506984B1 (en) * | 2008-06-17 | 2010-06-15 | Siemens Vai Metals Tech Gmbh | OXYGEN BLASLANT WITH PROTECTIVE ELEMENT |
-
2012
- 2012-08-08 DE DE102012016142A patent/DE102012016142B3/en not_active Expired - Fee Related
-
2013
- 2013-06-20 EP EP13737535.8A patent/EP2882876B1/en not_active Not-in-force
- 2013-06-20 WO PCT/EP2013/001826 patent/WO2014023373A1/en active Application Filing
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112857053A (en) * | 2020-12-31 | 2021-05-28 | 东北大学 | Nozzle arrangement for a bottom-blowing lance of a metallurgical plant and use thereof |
Also Published As
Publication number | Publication date |
---|---|
DE102012016142B3 (en) | 2013-10-17 |
WO2014023373A1 (en) | 2014-02-13 |
EP2882876B1 (en) | 2017-05-10 |
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