US3802681A - Self-cooling lance for oxygen blowing - Google Patents
Self-cooling lance for oxygen blowing Download PDFInfo
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- US3802681A US3802681A US00241598A US24159872A US3802681A US 3802681 A US3802681 A US 3802681A US 00241598 A US00241598 A US 00241598A US 24159872 A US24159872 A US 24159872A US 3802681 A US3802681 A US 3802681A
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- Prior art keywords
- lance
- oxygen
- ring
- flow
- set forth
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- Expired - Lifetime
Links
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 239000001301 oxygen Substances 0.000 title claims abstract description 47
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 47
- 238000001816 cooling Methods 0.000 title claims abstract description 34
- 238000007664 blowing Methods 0.000 title claims abstract description 26
- 230000000694 effects Effects 0.000 claims abstract description 15
- 238000004901 spalling Methods 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 230000005465 channeling Effects 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 239000003779 heat-resistant material Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 239000011819 refractory material Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 241000543381 Cliftonia monophylla Species 0.000 description 1
- 241000345477 Elliptio shepardiana Species 0.000 description 1
- 108010074506 Transfer Factor Proteins 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000000264 sodium ferrocyanide Substances 0.000 description 1
Images
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
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4606—Lances or injectors
- C21C5/4613—Refractory coated lances; Immersion lances
-
- 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
Definitions
- a ring-shaped or circular annular cross- [56] References cued section having a thickness of from about 3 to l0 mm UNITED STATES PATENTS and preferably from 4 to 7 mm is'particularly advanta- 481,088 8/1892 Chaney et ill 239/488 g
- the cooling effect f the xygen in the annular 1,494,675 5/1924 Ehrhart 239/483 or ring-shaped channel is enhanced by installing a he- 3,076,607 2/1963 Cordier 239/488 heal COll 1n the annular channel. Th1s lncreases the 313131919 10/1965 calzfflarim 239/483 rate of flow and cooling effect of the oxygen and the spiral path of flow also provides cooling.
- Consumable lances are immersed in the molten bath and advanced into it as the blowing proceeds until they are too short for usefuloperation. Their short lance life is tolerated in order to inject oxygen under the surface of the molten metal. Attempts have been made to lenghthen the service life of immersed lances by suitable selection of materials and protective coatings. Theextremely drastic thermal attack on the lance when it is immersed however prevents these measures from effectively lenghthening the life of such lances. This leaves remaining the cooling capacity of the oxygen blowing through the lance, which is not very successful in protecting it, and any other special cooling. methods are disregarded or avoided. i
- Permanent oxygen blowing lances are used for refining molten steel by blowing oxygen into it.
- the relatively lower heat conditions permits various measures taken to preserve and protect the lance to result in an appreciable increase in service life.
- Permanent lances are also provided with cooling conduits including single or multiple cooling canals, special coolants and oxygen conduits. All of these protective steps, particularly water cooling, are very complicated and expensive. They require circulating systems, pumps and in some instances heat exchangers forthe coolant and the like.
- An object of this invention is to provide a simple and economical method to prevent the rapid consumptionof oxygen blowing lances. Another object is to provide a self-cooling lance having a simple and economical structure.
- oxygen is conducted through a channel havinga ring-shaped crosssection adjoining the outer surface of the lance.
- This novel process and corresponding lance structure cools the lance enough to eliminate the need for any extraneous cooling; such as water cooling.
- the channel is narrow enough to accelerate the speed of oxygen flow, for example, between 400 and 900 meters per second (at standard conditions of 760 mm Hg. and C). This unexpectedly limits the wall temperature of the lance at the nozzle outlet to about 500C. At this temperature neither spalling nor burning. off of the lance occurs. If oxygen were conducted at the afore' mentioned flow rate through a channel having a circular cross-section, its diameter would be so small that a lance of effective length, which must extend in most instances about 2 or 3 meters into the furnace, would not be strong enough to be structurally rigid.
- the hollow or ring-shaped oxygen channel of this invention is however remarkably strong and rigid.
- the ring-shaped channel may be elliptical, triangular or rectangular as well as circular.
- a ring-shaped or circular annular cross-section having a width of from about 3 to mm and preferably from 4 to 7 mm is particularly advantageous.
- the cooling effect of the oxygen in the annular or ring-shaped channel may be enhanced by installing a helical coil in the annular channel to divide it into a pair of parallel spiral or helically shaped conduits. This increases the rate of flow and cooling effect of the oxygen and the spiral path of flow also provides additional cooling.
- the helical pitch of the coil may vary along the length of the lance to provide any desired control of speed of flow and resistance.
- the cooling effect of the oxygen may be further improved by adding small quan tities of water into the oxygen stream.
- FIG. 1 is a cross-sectional view in elevation, broken in length, of an oxygen blowing lance which is one embodiment of this invention.
- FIG. 2 is a graph of various operating characteristics of the lance shown in FIG. 1.
- FIG. 1 is shown a self-cooling oxygen blowing lance 10 including an elongated inner tube 1 within outer tube 2 which forms between them a narrow ringshaped annular slot 4 about 5 mm wide for conducting a flow of oxygen.
- Helical coil 3 having an angular pitch of 25.4 is installed in slot 4.
- Outer tube 2 is made of a heat resistant material, such as a refractoryor ceramic material or a specially heat-resistant steel, to protect it from penetration by the agitated molten metal.
- the blowing oxygen is introduced into the lance through upper inlet connection 5 and about curved plug 12 at the top of inner tube 1 into annular slot 4 in the direction of the illustrated arrows.
- Spiral or helical coil 3 further increases the speed of the flow of oxygen and channels it in a spiral path. This increase in speed and spiral flow provide cooling effects which limit the temperature of the lance to about 500C and therefore effectively protect it against burning, spalling and scaling.
- the following computation illustrates the conditions obtained by a lance operated and made in accordance with this invention and it corresponds to the conditions shown on the graphic illustration provided in FIG. 2.
- the slot width of the narrow annular slot is 5 mm with an outer tube 2 having an inside diameter of mm.
- Annular slot measurements F V/C 1,000/3,600 515 0.54 l C is 0 speed 4.
- a process for protecting a gaseous fluid blowing lance particularly a blowing lance for an industrial metal melting furnace characterized in that the gaseous blowingfluid is conducted through a ring-shaped zone in the lance contiguous with the outer surface of the lance, the zone being relatively thin on the order of from about 3 to mm., the distance across the ringshaped zone being substantially greater than the cross section of the zone, and the gaseous blowing fluid being provided to the zone under sufficient pressure to cause a flow of gaseous blowing fluid through the zone from about 400 to 900 meters per second at standard condidistance from the outer tube to provide a ring-shaped channel between them, an inlet connection on the lance, flow channeling means adjacent the inlet connection of the lance for conducting a flow of oxygen through the ring-shaped channel, the ring-shaped channel having a width of from about 3 to 10 mm whereby the flow'of oxygen is increased to a rate from about 400 to 900 meters. per second at standard conditions which is high enough to effectively cool the la
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Charging Or Discharging (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
An oxygen blowing lance has a narrow annular or ring-shaped channel formed between a pair of spaced tubes having a relatively small flow area. This accelerates the speed of flow enough to generate a cooling effect which eliminates the need for any extraneous cooling, such as water cooling. A speed of oxygen flow between 400 and 900 meters per second (at standard conditions of 760 mm Hg. and 0*C) limits the wall temperature of the lance at the nozzle outlet to about 500*C and prevents spalling and burning off. The hollow or ring-shaped oxygen channel makes the lance remarkably strong and rigid. The ring-shaped channel may be elliptical, triangular or rectangular as well as circular. A ring-shaped or circular annular cross-section having a thickness of from about 3 to 10 mm and preferably from 4 to 7 mm is particularly advantageous. The cooling effect of the oxygen in the annular or ring-shaped channel is enhanced by installing a helical coil in the annular channel. This increases the rate of flow and cooling effect of the oxygen and the spiral path of flow also provides cooling. The helical pitch of the coil may vary along the length of the lance to provide any desired control of speed of flow and resistance. The cooling effect of the oxygen may be further improved by adding small quantities of water into the oxygen stream.
Description
United States Patent 1191 Pfeifer Apr. 9, 1974 SELF-COOLING LANCE FOR OXYGEN 1 BLOWING Primary Examiner-Gerald A. Dost [75] Inventor: Ferdinand Pfeifer, Krefeld, Attorney or "9" and Hutz Germany [73] Assignee: Messer Griesheim GmbH, [57] ABSTRACT Frankfurt/Main, Germany An oxygen blowing lance has a narrow annular or ring-shaped channel formed between a pair of spaced [22] Flled 1972 tubes having a relatively small flow area. This acceler- [21] Appl. No.2 241,598 ates the speed of flow enough to generate a cooling effect which eliminates the need for any extraneous l cooling, such as water cooling. A speed of oxygen flow [30] Fore'gn Apphcamn Priority Data between 400 and 900 meters per second (at standard Apr. 10, 1971 Germany 2117714 Conditions of 7 0 Hg. and 0 limits the wall a temperature of the lance at the nozzle outlet to about [52] [1.8. CI. 266/34 L,' 239/488 500 and prevents spaning and burning off. The
[51 Int. Cl. CZlC 7/00 low or ring shaped Oxygen channel makes the lance [58] Fleld 0f Search 239/1325, 483, 488; remarkably strong and rigid. The ring shaped channel 266/34 34 LM may be elliptical, triangular or rectangular as well as circular. A ring-shaped or circular annular cross- [56] References cued section having a thickness of from about 3 to l0 mm UNITED STATES PATENTS and preferably from 4 to 7 mm is'particularly advanta- 481,088 8/1892 Chaney et ill 239/488 g The cooling effect f the xygen in the annular 1,494,675 5/1924 Ehrhart 239/483 or ring-shaped channel is enhanced by installing a he- 3,076,607 2/1963 Cordier 239/488 heal COll 1n the annular channel. Th1s lncreases the 313131919 10/1965 calzfflarim 239/483 rate of flow and cooling effect of the oxygen and the spiral path of flow also provides cooling. The helical or urn...
3,645,520 2/1972 Acre... 266 34 L {E 535:ig lgigfg igfig ga s? gg zgg fi 3,321,139 5/1967 DeSaint M61116... 266/34L p Th ff f h p b f 3,706,549 12/1972 Knuppeletal. 266/35 P e C00 3? t i g may 3,397,878 8/1968' 116111165 et a] 266/41 {her Improved y adding Small quantifies Of Water mto 3,504,856 4/1970 Hinkeldey et al. 266/34 L the yg Stream- 3,608,88O 9/1971 Gombert 266/41 3,703,279 11 1972 Saccamano et al 266/41 10 Claims, 2 Drawing Figures SHEET 2 BF 2 PATENTEUAPR 9 I974 Dem QmN sou can N l- I ooh 8m m 68- .I m mm 8: m 8m R 8 82 m 5 m 8& 9 3 82 Sh m 8 89 W 1 a M 89 W m 0 88 l rt m BACKGROUND OF THE INVENTION This invention relates to a self-cooling lance for oxygen blowing. Presently used oxygen blowinglances are either consumable or permanent. Consumable lances are immersed in the molten bath and advanced into it as the blowing proceeds until they are too short for usefuloperation. Their short lance life is tolerated in order to inject oxygen under the surface of the molten metal. Attempts have been made to lenghthen the service life of immersed lances by suitable selection of materials and protective coatings. Theextremely drastic thermal attack on the lance when it is immersed however prevents these measures from effectively lenghthening the life of such lances. This leaves remaining the cooling capacity of the oxygen blowing through the lance, which is not very successful in protecting it, and any other special cooling. methods are disregarded or avoided. i
Permanent oxygen blowing lances are used for refining molten steel by blowing oxygen into it. For these lances the relatively lower heat conditions permits various measures taken to preserve and protect the lance to result in an appreciable increase in service life. Ex-
tensive protective measures are therefore applied to permanent lances including the use of heat resistant, refractory, ceramic or flame-proof materials. Permanent lances are also provided with cooling conduits including single or multiple cooling canals, special coolants and oxygen conduits. All of these protective steps, particularly water cooling, are very complicated and expensive. They require circulating systems, pumps and in some instances heat exchangers forthe coolant and the like. An object of this invention is to provide a simple and economical method to prevent the rapid consumptionof oxygen blowing lances. Another object is to provide a self-cooling lance having a simple and economical structure.
7 SUMMARY OF THE INVENTION In accordance with this invention oxygen is conducted through a channel havinga ring-shaped crosssection adjoining the outer surface of the lance.
This novel process and corresponding lance structure cools the lance enough to eliminate the need for any extraneous cooling; such as water cooling. The channel is narrow enough to accelerate the speed of oxygen flow, for example, between 400 and 900 meters per second (at standard conditions of 760 mm Hg. and C). This unexpectedly limits the wall temperature of the lance at the nozzle outlet to about 500C. At this temperature neither spalling nor burning. off of the lance occurs. If oxygen were conducted at the afore' mentioned flow rate through a channel having a circular cross-section, its diameter would be so small that a lance of effective length, which must extend in most instances about 2 or 3 meters into the furnace, would not be strong enough to be structurally rigid. The hollow or ring-shaped oxygen channel of this invention is however remarkably strong and rigid. The ring-shaped channel may be elliptical, triangular or rectangular as well as circular. A ring-shaped or circular annular cross-section having a width of from about 3 to mm and preferably from 4 to 7 mm is particularly advantageous. The cooling effect of the oxygen in the annular or ring-shaped channel may be enhanced by installing a helical coil in the annular channel to divide it into a pair of parallel spiral or helically shaped conduits. This increases the rate of flow and cooling effect of the oxygen and the spiral path of flow also provides additional cooling. The helical pitch of the coil may vary along the length of the lance to provide any desired control of speed of flow and resistance. The cooling effect of the oxygen may be further improved by adding small quan tities of water into the oxygen stream.
BRIEF DESCRIPTION OF THE DRAWINGS Novel features and advantages of the present invention will become apparent to one skilled in the art from a reading of the following description in conjunction with the accompanying drawings wherein similar reference characters refer to similar parts and in which:
FIG. 1 is a cross-sectional view in elevation, broken in length, of an oxygen blowing lance which is one embodiment of this invention; and
. FIG. 2 is a graph of various operating characteristics of the lance shown in FIG. 1.
In FIG. 1, is shown a self-cooling oxygen blowing lance 10 including an elongated inner tube 1 within outer tube 2 which forms between them a narrow ringshaped annular slot 4 about 5 mm wide for conducting a flow of oxygen. Helical coil 3 having an angular pitch of 25.4 is installed in slot 4. Outer tube 2 is made of a heat resistant material, such as a refractoryor ceramic material or a specially heat-resistant steel, to protect it from penetration by the agitated molten metal.
The blowing oxygen is introduced into the lance through upper inlet connection 5 and about curved plug 12 at the top of inner tube 1 into annular slot 4 in the direction of the illustrated arrows. Spiral or helical coil 3 further increases the speed of the flow of oxygen and channels it in a spiral path. This increase in speed and spiral flow provide cooling effects which limit the temperature of the lance to about 500C and therefore effectively protect it against burning, spalling and scaling. The following computation illustrates the conditions obtained by a lance operated and made in accordance with this invention and it corresponds to the conditions shown on the graphic illustration provided in FIG. 2.
FIG. 2 shows conditions for a lance 10, having a length, L=2 m., operating in a 30-ton electric furnace having a wall radiating temperature of l,300C and a heat transfer factor of aStr 240 kcal/m hC. The oxygen throughput was taken on the basis of volume, V= L000 Nm' /h. N means at standard conditions. The slot width of the narrow annular slot is 5 mm with an outer tube 2 having an inside diameter of mm. The prede- At= Q/V C,,= 388C Cp is specific heat at constant pressure. b. Final Oxygen Temperature L 3309C..- 3. Annular slot measurements F V/C 1,000/3,600 515 0.54 l C is 0 speed 4. Angle of pitch of the coil sin a lO8/7r'80 0.43 25.4 5. Pressure loss P A p L 2.7 4.65 12.6 atmospheres absolute pressure. 6. Composition a. lance length: L 2 m b. 0 throughput: V 1,000 Nm /h Slot outer diameter: D,, 80 mm d) Slot inside diameter: D,- 70 mm d) Slot width: s 5 mm Average wall temperature: t,,, 350 C g. Angle of pitch of the spiral coil: or 25.4
h. Pressure lossz P 12.5 atmospheres absolute pressure i. Wall temperature at the nozzle outlet: t 500C Note: 45 here means approximately.
I claim:
1. A process for protecting a gaseous fluid blowing lance particularly a blowing lance for an industrial metal melting furnace characterized in that the gaseous blowingfluid is conducted through a ring-shaped zone in the lance contiguous with the outer surface of the lance, the zone being relatively thin on the order of from about 3 to mm., the distance across the ringshaped zone being substantially greater than the cross section of the zone, and the gaseous blowing fluid being provided to the zone under sufficient pressure to cause a flow of gaseous blowing fluid through the zone from about 400 to 900 meters per second at standard condidistance from the outer tube to provide a ring-shaped channel between them, an inlet connection on the lance, flow channeling means adjacent the inlet connection of the lance for conducting a flow of oxygen through the ring-shaped channel, the ring-shaped channel having a width of from about 3 to 10 mm whereby the flow'of oxygen is increased to a rate from about 400 to 900 meters. per second at standard conditions which is high enough to effectively cool the lance.
4. An oxygen blowing lance as set forth in claim 3 wherein the width of the ring-shaped channel is from about 4 to 7 mm.
5. A lance as set forth in claim 3 wherein the flow channeling means'includes a plug in the end of the inner tube disposed adjacent the inlet connection.
6. A lance as set forth in claim 3 wherein a spiral element is disposed in the ring-shaped channel to cause the oxygen flowing through it to flow in a spiral path whereby its cooling effect is enhanced.
7. A lance as set forth in claim 6 wherein the spiral element has a varying pitch whereby the cooling effect of the oxygen flow along the length of the lance is controlled.
8. A lance as set forth in claim 3 wherein the outer tube is a heat resistant material.
9. A lance as set forth in claim 8 wherein the outer tube is a refractory material.
10. A lance as set forth in claim 9 wherein the oute tube is a ceramic material.
Claims (10)
1. A process for protecting a gaseous fluid blowing lance particularly a blowing lance for an industrial metal melting furnace characterized in that the gaseous blowing fluid is conducted through a ring-shaped zone in the lance contiguous with the outer surface of the lance, the zone being relatively thin on the order of from about 3 to 10 mm., the distance across the ring-shaped zone being substantially greater than the cross section of the zone, and the gaseous blowing fluid being provided to the zone under sufficient pressure to cause a flow of gaseous blowing fluid through the zone from about 400 to 900 meters per second at standard conditions sufficient to cool the wall of the lance at its outlet to prevent spalling and burning.
2. A process as set forth in claim 1 wherein the flow of gaseous blowing fluid is channeled in a helical path through the ring-shaped zone.
3. An oxygen blowing lance comprising an outer tube, an inner tube disposed within and spaced a short distance from the outer tube to provide a ring-shaped channel between them, an inlet connection on the lance, flow channeling means adjacent the inlet connection of the lance for conducting a flow of oxygen through the ring-shaped channel, the ring-shaped channel having a width of from about 3 to 10 mm whereby the flow of oxygen is increased to a rate from about 400 to 900 meters per second at standard conditions which is high enough to effectively cool the lance.
4. An oxygen blowing lance as set forth in claim 3 wherein the width of the ring-shaped channel is from about 4 to 7 mm.
5. A lance as set forth in claim 3 wherein the flow channeling means includes a plug in the end of the inner tube disposed adjacent the inlet connection.
6. A lance as set forth in claim 3 wherein a spiral element is disposed in the ring-shaped channel to cause the oxygen flowing through it to flow in a spiral path whereby its cooling effect is enhanced.
7. A lance as set forth in claim 6 wherein the spiral element has a varying pitch whereby the cooling effect of the oxygen flow along the length of the lance is controlled.
8. A lance as set forth in claim 3 wherein the outer tube is a heat resistant material.
9. A lance as set forth in claim 8 wherein the outer tube is a refractory material.
10. A lance as set forth in claim 9 wherein the outer tube is a ceramic material.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712117714 DE2117714C3 (en) | 1971-04-10 | Process for cooling lances for blowing oxygen into industrial furnaces Messer Griesheim GmbH, 6000 Frankfurt Elf: Pfeifer, Ferdinand, Dip} .- Ing., 4150Krefeld |
Publications (1)
Publication Number | Publication Date |
---|---|
US3802681A true US3802681A (en) | 1974-04-09 |
Family
ID=5804521
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00241598A Expired - Lifetime US3802681A (en) | 1971-04-10 | 1972-04-06 | Self-cooling lance for oxygen blowing |
Country Status (3)
Country | Link |
---|---|
US (1) | US3802681A (en) |
FR (1) | FR2131674A5 (en) |
GB (1) | GB1366824A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4218604A (en) * | 1978-04-19 | 1980-08-19 | Hitachi, Ltd. | Method for welding of austenitic stainless steel piping |
US4953789A (en) * | 1986-05-22 | 1990-09-04 | Bayerische Motoren Werke Ag | Arrangement for the metered supply of a fuel, especially into the combustion space of an internal combustion engine |
WO1991005214A1 (en) * | 1989-09-29 | 1991-04-18 | Ausmelt Pty. Ltd. | Top submerged injection with a shrouded lance |
WO1992018819A1 (en) * | 1991-04-23 | 1992-10-29 | Commonwealth Scientific And Industrial Research Organisation | Lance for immersion in a pyrometallurgical bath and method involving the lance |
US5308043A (en) * | 1991-09-20 | 1994-05-03 | Ausmelt Pty. Ltd. | Top submergable lance |
WO2013080110A1 (en) | 2011-11-30 | 2013-06-06 | Outotec Oyj | Fluid cooled lances for top submerged injection |
WO2014167532A1 (en) | 2013-04-12 | 2014-10-16 | Outotec Oyj | Apparatus for temperature measurements of a molten bath in a top submerged injection lance installation |
WO2015056142A1 (en) | 2013-10-16 | 2015-04-23 | Outotec (Finland) Oy | Top submerged injection lance for enhanced heat transfer |
WO2015056143A1 (en) | 2013-10-16 | 2015-04-23 | Outotec (Finland) Oy | Top submerged injection lance for enhanced submerged combustion |
US9528766B2 (en) | 2011-06-30 | 2016-12-27 | Outotec Oyj | Top submerged injecting lances |
US9771627B2 (en) | 2011-09-02 | 2017-09-26 | Outotec Oyj | Lances for top submerged injection |
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US1494675A (en) * | 1921-06-16 | 1924-05-20 | Elliott Co | Spray nozzle |
US3076607A (en) * | 1960-12-02 | 1963-02-05 | Inst Rech S De La Sederurgie F | Hydrocarbon injector for blastfurnaces |
US3213919A (en) * | 1962-05-14 | 1965-10-26 | Calzolari Roberto | Nozzle apparatus for burning fuel |
US3269829A (en) * | 1963-09-24 | 1966-08-30 | United States Steel Corp | Method and apparatus for introducing steam and oxygen into a bath of molten steel |
US3321139A (en) * | 1963-11-25 | 1967-05-23 | Siderurgie Fse Inst Rech | Apparatus for treating molten metals |
US3353808A (en) * | 1965-02-23 | 1967-11-21 | Louis E Norburn | Refractory coated oxygen lance |
US3397878A (en) * | 1965-11-19 | 1968-08-20 | Union Carbide Corp | Under-bath tuyere |
US3504856A (en) * | 1969-05-15 | 1970-04-07 | Louis Hinkeldey Jr | Oxygen lance assembly |
US3608880A (en) * | 1969-01-28 | 1971-09-28 | Wendel Sidelor And Compagnie D | Blast feed device for a steel converter |
US3645520A (en) * | 1970-07-29 | 1972-02-29 | Allegheny Ludlum Ind Inc | Consumable lance |
US3703279A (en) * | 1969-08-15 | 1972-11-21 | Joslyn Mfg & Supply Co | Reactor |
US3706549A (en) * | 1968-02-24 | 1972-12-19 | Maximilianshuette Eisenwerk | Method for refining pig-iron into steel |
-
1972
- 1972-03-28 FR FR7210787A patent/FR2131674A5/fr not_active Expired
- 1972-04-06 US US00241598A patent/US3802681A/en not_active Expired - Lifetime
- 1972-04-10 GB GB1645972A patent/GB1366824A/en not_active Expired
Patent Citations (13)
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US481088A (en) * | 1892-08-16 | Hydrocarbon-burner | ||
US1494675A (en) * | 1921-06-16 | 1924-05-20 | Elliott Co | Spray nozzle |
US3076607A (en) * | 1960-12-02 | 1963-02-05 | Inst Rech S De La Sederurgie F | Hydrocarbon injector for blastfurnaces |
US3213919A (en) * | 1962-05-14 | 1965-10-26 | Calzolari Roberto | Nozzle apparatus for burning fuel |
US3269829A (en) * | 1963-09-24 | 1966-08-30 | United States Steel Corp | Method and apparatus for introducing steam and oxygen into a bath of molten steel |
US3321139A (en) * | 1963-11-25 | 1967-05-23 | Siderurgie Fse Inst Rech | Apparatus for treating molten metals |
US3353808A (en) * | 1965-02-23 | 1967-11-21 | Louis E Norburn | Refractory coated oxygen lance |
US3397878A (en) * | 1965-11-19 | 1968-08-20 | Union Carbide Corp | Under-bath tuyere |
US3706549A (en) * | 1968-02-24 | 1972-12-19 | Maximilianshuette Eisenwerk | Method for refining pig-iron into steel |
US3608880A (en) * | 1969-01-28 | 1971-09-28 | Wendel Sidelor And Compagnie D | Blast feed device for a steel converter |
US3504856A (en) * | 1969-05-15 | 1970-04-07 | Louis Hinkeldey Jr | Oxygen lance assembly |
US3703279A (en) * | 1969-08-15 | 1972-11-21 | Joslyn Mfg & Supply Co | Reactor |
US3645520A (en) * | 1970-07-29 | 1972-02-29 | Allegheny Ludlum Ind Inc | Consumable lance |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4218604A (en) * | 1978-04-19 | 1980-08-19 | Hitachi, Ltd. | Method for welding of austenitic stainless steel piping |
US4953789A (en) * | 1986-05-22 | 1990-09-04 | Bayerische Motoren Werke Ag | Arrangement for the metered supply of a fuel, especially into the combustion space of an internal combustion engine |
US5251879A (en) * | 1989-09-29 | 1993-10-12 | Floyd John M | Top submerged injection with a shrouded lance |
WO1991005214A1 (en) * | 1989-09-29 | 1991-04-18 | Ausmelt Pty. Ltd. | Top submerged injection with a shrouded lance |
US5505762A (en) * | 1991-04-23 | 1996-04-09 | Commonwealth Scientific And Industrial Research Organisation | Lance for immersion in a pyrometallurgical bath and method involving the lance |
WO1992018819A1 (en) * | 1991-04-23 | 1992-10-29 | Commonwealth Scientific And Industrial Research Organisation | Lance for immersion in a pyrometallurgical bath and method involving the lance |
US5308043A (en) * | 1991-09-20 | 1994-05-03 | Ausmelt Pty. Ltd. | Top submergable lance |
US9528766B2 (en) | 2011-06-30 | 2016-12-27 | Outotec Oyj | Top submerged injecting lances |
US9771627B2 (en) | 2011-09-02 | 2017-09-26 | Outotec Oyj | Lances for top submerged injection |
WO2013080110A1 (en) | 2011-11-30 | 2013-06-06 | Outotec Oyj | Fluid cooled lances for top submerged injection |
US9829250B2 (en) | 2011-11-30 | 2017-11-28 | Outotec Oyj | Fluid cooled lances for top submerged injection |
WO2014167532A1 (en) | 2013-04-12 | 2014-10-16 | Outotec Oyj | Apparatus for temperature measurements of a molten bath in a top submerged injection lance installation |
WO2015056142A1 (en) | 2013-10-16 | 2015-04-23 | Outotec (Finland) Oy | Top submerged injection lance for enhanced heat transfer |
WO2015056143A1 (en) | 2013-10-16 | 2015-04-23 | Outotec (Finland) Oy | Top submerged injection lance for enhanced submerged combustion |
US10077940B2 (en) | 2013-10-16 | 2018-09-18 | Outotec (Finland) Oy | Top submerged injection lance for enhanced submerged combustion |
Also Published As
Publication number | Publication date |
---|---|
FR2131674A5 (en) | 1972-11-10 |
DE2117714A1 (en) | 1972-10-19 |
GB1366824A (en) | 1974-09-11 |
DE2117714B2 (en) | 1976-10-14 |
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