CA1081946A - Oxygen lance and sensing adapter arrangement - Google Patents
Oxygen lance and sensing adapter arrangementInfo
- Publication number
- CA1081946A CA1081946A CA338,101A CA338101A CA1081946A CA 1081946 A CA1081946 A CA 1081946A CA 338101 A CA338101 A CA 338101A CA 1081946 A CA1081946 A CA 1081946A
- Authority
- CA
- Canada
- Prior art keywords
- sensor
- gas
- nozzle head
- lance
- mounting support
- 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.)
- Expired
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- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
Abstract of the Disclosure The invention is directed to a combination of a lance and nozzle assembly for supplying gas to a basic oxygen furnace. The lance and nozzle include an arrangement to accommodate a sensing device or unit which is adapted to transmitt signals providing information in connection with the refractory or contents of the bath contained wihting the vessel. The arrangement is such that it accommodates the normal expansion and contracction of the lance resulting from the atmosphere within which the lance is utilized.
Description
~gell l.ance_and Sensing Adapter Arrangemellt This appllcation is-a division of Canadian patent application Se.rial No. 279,018 filed May 24, l.977.
Background oE -the Invention l. Field o:E the Inventioll `
Thls invention relates to the ar-t of steel making ~ ..
equipment and more particularly to an improved gas lance which includes provisions and an arrangement adapted to support sensing devices for the purpose of securing various information 10 relating to the condition of the refractory or bath in a basic oxygen furnace at any given time during the charge to tap stage - of refinement or in the periods between these times.
Background oE -the Invention l. Field o:E the Inventioll `
Thls invention relates to the ar-t of steel making ~ ..
equipment and more particularly to an improved gas lance which includes provisions and an arrangement adapted to support sensing devices for the purpose of securing various information 10 relating to the condition of the refractory or bath in a basic oxygen furnace at any given time during the charge to tap stage - of refinement or in the periods between these times.
2. Description of the Prior Art The prior ar-t is exemplified by U.S. patents
3,620,455, November 16j 1971 to Berry and 3,827,632, August 6, 1974 to Rymarchyk, et al. U.S. paten-ts particularly pertaining to sensor lances are 3,396,960, ~uyust 13, 1968 to Maatsch;
3,413,852, December 3, 1968 to Engel et al; and 3,727,897, April 17, 1973 to Bennet-t.
The present lnvention is an improvement in providing an arrangement particularly adapted to accommoda-te effectively different -types of sensing or other devices which may be utilized in analyzing the condition of the bath within the refractory in one or another stages of its refinement from charge to tap and in the periods between these times.
Summary Broadly disclosed is an oxygen lance and nozzle including a central pipe enclosin~ a conductor, either electrical, optical, or other. The lower end of the central pipe is provided with supporting structure for accommodating any sensing device which is arranged to transmit signals, or information it receives through the oxygen orifice concerning conditions relating to the contents within the refractory in one or another stages of its refinement from charge to tap and in ~ ~-the periods between these times. Such signals or information may be initiated through radar, optical, sonar or other electrical means and may relate to, but is not limited to pyrometric conditions, sound, heat, lights or metallurgical content.
.
The invention in this divisional application particularly pertains to a gas injection lance for insertion into a vessel for processing molten me-tal. The lance includes a nozzle head at one end adapted to be positioned proximate to the molten metal, a plurality of concentric gas and coolant-carrying 8~
tubes, at least thc innermost gas-carryiny tube of which is connected to and in communication with the nozzle head Eor discharging gas therethrough. A sensor-mounting support is positioned within the gas-carryin~ tube and a se1lsor ;s. niounted by the sensor-mounting support proximate to and out of contact with the nozzle head and in axially spaced relation thereto.
The support includes a sleeve portion with means mounting the sleeve portion from the innermos-t -tube comprising bracket means extending from the innermost tube toward the support. Slot means in the bracket means open axially toward one end of -the lance. Lug means radially e~-tend from the sleeve portion illtO
the slot means, and means hold the lug means within the slot means.
Brief Description oE the Drawings FIG. l is a side elevational view of a lance and nozzle combination;
FIG. 2 is an enlar~ed cross-sectioncal view of ~1e upper portion of the lance disclosed in FIG. l;
FIG. 3 is an enlarged cross-sectional view of a lower portion oE the lance and nozzle disclosed in FIG. l;
FIG. 4 is a cro6s-sectional view taken along the ~ ~
line 4 - 4 of FIG. 2; ~ ;
;; FIG. 5 is a cross-sectional view taken along the line 5 - 5 of FIG. 3;
FIG. 6 is a view of a modified lower portion of the lance;
FIG. 7 is a view similar to FIG. 6 showing a modified instrumentation adapter;
FIG. 8 is a cross-sectional view taken along the line 8 - 8 of FIG. 7; and, FIG. 9 is a cross-sectional view of a L9~6 modified upper portion of a lance.
Description oE the Preferred Embodiment FIG. 1 discloses a lance 10 having an adapter head 11, and a hanger 12 connected there-to. The head includes a bushing sleeve 13 provided with a flange 14 to which is connected a cover plate 15 by means of bolt and nut fasteners 16. I'he bushing sleeve 13 also includes a second flange 17 connec-ted by means of bolt and nut fasteners 18 to a flange 19 attached -to the upper end of a first pipe 20. The pipe 20 is provided with an oxygen inlet tube 21 communicating with an upper gas chan~er 22. The first pipe 20 is provided with a quick disconnect coupling including a flange 23 connected to a flange 24 by means of bolt and nut fasteners 25. A second bushing sleeve 26 is connected to the flange 24.
A first tubular mernber 27 is provided with an upper piston sleeve 28 having O-ring seals 29 in sliding sealing relation with respect to the bushing sleeve. An inner sleeve 30 is connected to a ring 31 having O-ring seals 32 in engagement with the inner surface of the piston sleeve 28. The first tu-bular member forms an oxygen passage 33 in communication with the chamber 22.
A first pipe ex-tension 34 is connected at its upper end to a flange 35 providing support for hanger members 12 from which the lance is hung when used in the vertical : 25 operating position~ A water inlet connection 36 is connected to :~:
the pipe 34. The pipe 34 is connected to a flange 37 in turn :;
connected to a flange 38 by fasteners 39. The flange 37 is : connected to a ring 40 in turn connected to a second tubular mem-ber 41 providing a water inlet passage 42 communicating with the inlet connection 36. A water outlet connection 43 communi-cates with an outlet passage 44 provided by an outer third tubul.ar member 45.
1~)83L~46 A nozzle head or lanee tip is designatecl at 46 as best shown in FIGS. 1 and 3. As shown in FIG. 3 the nozzle 46 is provided with a cylindrical skirt 47 connected to the third or outer tubular member 45. The tubular members 27, 41 and 45 may comprise a plurality of individual sections as shown in FIG. 3 which are welded together for manufacturing reasons.
The tubular member 41 includes a section 41a which is in over-lapping relation with respect to the lower portion of the tubular member 41. The nozzle is provided at its lower end with a water chamber 48 whieh eommunieates with the inlet pass.lgc 42 and outlet passage 44. The oxygen passage communicates with an oxygen chamber 49 directing oxygen through one or more discharge orifiees 50 to a suitable basie oxygen furnaee vessel (not shown).
An arrangement and adaptation for supporting a sensing deviee is indieated generally at 51. This ineludes :~ a eentral pipe 52 provided with eentering spaces 52' to centrally spaee and support the eentral pipe relative to the tubular member 27.
The lower end of the sensor mounting pipe 52 is eonneeted to a eylindrieal sleeve 53 having a spider type arrangement ineluding lugs 54 eonneeted thereto. The lugs 54 are seeured in slots 55 provided in bracke-ts 56 to which they are seeured by taek welding after alignment. The lower elld of the sleeve 53 is sealingly seeured to a eylindrical block 57 having a bore 57' within which a cylindrieal housing 60 is supported. The housing 60 is supported by a eircumferential flange 60' and eap serews 61 on bloek 57. A top plate 63 supports a eonventional eleetrieal outlet 64 whieh is eonneeted to an eleetrieal eo-axial eable or collductor G5. l'lle colldllct:or cable may be straight or of serpentine eonfiguration as dis-elosed.
As best shown in FIG. 2, the conductor cable 65 extends upwardly wi-thin the pipe 51 in-to a conical adapter 66, in turn connected to a third piston sleeve 67. The third piston sleeve 67 is in engagement with -the inner surface of the bushing sleeve 13 and is sealed relative thereto by O-riny seals 68.
A bracket 69 is connec-ted to lugs 70 carried by the adapter 66 by means of screws 71. A lock sleeve or screw type connector 72 supports the cable 65 on the bracket 69. The cable is formed with an expansion loop 72 dlsposed within the piston sleeve 67.
A lock sleeve 73 also secures the cable 65 to the plate 15. Lock sleeves 72 and 73 are of a conventional type for tightly securing the cable to the support 69 allcl plate 15. Thus the cable disposed below the suppor-t 69 is held within the pipe 52 in taut relation.
The modified constructions FIGS. 6 discloses ; a lower portion of a modified lance. This lance is particularly `
adapted for a single orifice lance though it may be adapted to a multi-orifice lance where the signals are to be received through a single orifice.
In this modification a section of pipe 53' is connected to the lower end of the sleeve 53 and is disposed .: ; ' angularly to be in axial alignmen-t with the discharge orifice 50. The other structure is similar and the same reference - characters are applied. ~
FIG. 7 discloses a lance similar to FIG. 6 .
with an adapter 82 connected to plate 80 on block 57 by means of cap screws 61 through a circumferential flange 85 provided on said adapter.
The adapter 82 includes a cave shaped opening 83 communicating with a holder opening or socket 81 within which may be secllred a probe thermocouple or othcr instrument designated at 84.
FIG. 9 discloses a modified top portion oE the lance similar to FIG. 2 with the same reference characters applied. ~lowever in this case it will be noted that the third piston sleeve 67 has an outside diameter which is less than the diameter of the inner sleeve 30. This permits -the sensing device arrangement 51 including centered pipe 52 third piston sleeve 67 and other associated structure to be drawn downwardly through the sleeve 30 for disassembly when required. Thus t]lis modifi-cation permits withdrawl of the arrangement 51 through the top or through the bottom of the lance as desired.
, ' The Operation In operation the lance 10 is hung ver-tically from the hanger 12 from suitable hoist structure and the nozzle is disposed within a B.O.F. vessel. Oxygen is directed through the inlet 21 through chamber 22 passage 33 chamber 49 and outwardly through the nozzles onto the surface of a molten bath.
The lance is cooled by water entering into the water inlet connection 36 whereupon it circulates downwardly through passage 42 upwardly through water outlet connection 43. The O-rings seal the upper end of the pipe 52 against the entrance of oxygen and the lower sleeve structure 60 and block 57 prevent the entrance of any oxygen into the pipe 52. Further the interior of the pipe 52 may be vented as disclosed in U. S.~
patent 3 827 632 to discharge any oxygen which may be inadver-tently leaked into the pipe 52.
An electronic unit or any other type of sensor may be placed within the housing 60 whlcll provicleci a space which is isolated from the pipe 52. A sensor may be any signal conducting medium such as cable wire light transmitting medium or sonic transmitting medium. It may _7_ ~8~946 be a fiber optic conductor. The sensor which may be associated with the lance may be a probe or thermocouple as shown in FIG.
7, and is not limited to any type, it is intellded tll;lt it m.ly observe, see, read, receive, monitor and transmit conditions within -the refractory. Such a sensor may be plugged into the electrical co-axial cable and will function to receive occurrences emanating from the refractory through the oxygen discharge orifice. Thus occurrences in thè bath may be electronically communica-ted through the co-axial cable to suitable receiving means provided for this purpose. The sensor and receiving means will function to permit analysis of certain ba-th conditions which might be metallurgical, relate to sound and light or be pyrometric, etc., -the primary purpose of the present invention being to provide an arrangemént which can easily accommodate sensing devices in a lance that will function effectively and permit the safe, quic]c and reliable installa-tion of such sensing devices.
The inner pipe will be protected against the inadvertent entrance and build up of oxygen in the pipe 52 by suitable vent means above referred to or by signalling means as deemed necessary for the beneficiation of the process involved.
Since the pipe 5~ is provided with the piStOIl sleeve 67 and first pipe 20, bushing sleeve 13, arrangement can contract and expand vertically as necessary to accommodate the extreme temperatures to which oxygen lances are subjected.
Such expansion and contraction over the length of a lance assembly is considerable and the expansion loop 72 permits this to take place. The present arrangement can be utilized in various lances of different designs which have in common the contraction and expansion requirements described above.
.
L9d~6 The arrangement may be utilized with any gas lance or oxygen-oil or oxygen fuel burner lance where some form of sensor or information gatllerillg means is to l~c incorporated. The central tube provides a safe and yet effective construc-tion and shielding means for the cable conductor.
The arrangement shown may be also be u-tilized with any signal or information -transmittal method such as but not limited to light usage or fiber optic transfer medium as well as the transmittal of an electrical signal by cable.
It provides a safe and economlc manner in which the desired result may be achieved.
.
3,413,852, December 3, 1968 to Engel et al; and 3,727,897, April 17, 1973 to Bennet-t.
The present lnvention is an improvement in providing an arrangement particularly adapted to accommoda-te effectively different -types of sensing or other devices which may be utilized in analyzing the condition of the bath within the refractory in one or another stages of its refinement from charge to tap and in the periods between these times.
Summary Broadly disclosed is an oxygen lance and nozzle including a central pipe enclosin~ a conductor, either electrical, optical, or other. The lower end of the central pipe is provided with supporting structure for accommodating any sensing device which is arranged to transmit signals, or information it receives through the oxygen orifice concerning conditions relating to the contents within the refractory in one or another stages of its refinement from charge to tap and in ~ ~-the periods between these times. Such signals or information may be initiated through radar, optical, sonar or other electrical means and may relate to, but is not limited to pyrometric conditions, sound, heat, lights or metallurgical content.
.
The invention in this divisional application particularly pertains to a gas injection lance for insertion into a vessel for processing molten me-tal. The lance includes a nozzle head at one end adapted to be positioned proximate to the molten metal, a plurality of concentric gas and coolant-carrying 8~
tubes, at least thc innermost gas-carryiny tube of which is connected to and in communication with the nozzle head Eor discharging gas therethrough. A sensor-mounting support is positioned within the gas-carryin~ tube and a se1lsor ;s. niounted by the sensor-mounting support proximate to and out of contact with the nozzle head and in axially spaced relation thereto.
The support includes a sleeve portion with means mounting the sleeve portion from the innermos-t -tube comprising bracket means extending from the innermost tube toward the support. Slot means in the bracket means open axially toward one end of -the lance. Lug means radially e~-tend from the sleeve portion illtO
the slot means, and means hold the lug means within the slot means.
Brief Description oE the Drawings FIG. l is a side elevational view of a lance and nozzle combination;
FIG. 2 is an enlar~ed cross-sectioncal view of ~1e upper portion of the lance disclosed in FIG. l;
FIG. 3 is an enlarged cross-sectional view of a lower portion oE the lance and nozzle disclosed in FIG. l;
FIG. 4 is a cro6s-sectional view taken along the ~ ~
line 4 - 4 of FIG. 2; ~ ;
;; FIG. 5 is a cross-sectional view taken along the line 5 - 5 of FIG. 3;
FIG. 6 is a view of a modified lower portion of the lance;
FIG. 7 is a view similar to FIG. 6 showing a modified instrumentation adapter;
FIG. 8 is a cross-sectional view taken along the line 8 - 8 of FIG. 7; and, FIG. 9 is a cross-sectional view of a L9~6 modified upper portion of a lance.
Description oE the Preferred Embodiment FIG. 1 discloses a lance 10 having an adapter head 11, and a hanger 12 connected there-to. The head includes a bushing sleeve 13 provided with a flange 14 to which is connected a cover plate 15 by means of bolt and nut fasteners 16. I'he bushing sleeve 13 also includes a second flange 17 connec-ted by means of bolt and nut fasteners 18 to a flange 19 attached -to the upper end of a first pipe 20. The pipe 20 is provided with an oxygen inlet tube 21 communicating with an upper gas chan~er 22. The first pipe 20 is provided with a quick disconnect coupling including a flange 23 connected to a flange 24 by means of bolt and nut fasteners 25. A second bushing sleeve 26 is connected to the flange 24.
A first tubular mernber 27 is provided with an upper piston sleeve 28 having O-ring seals 29 in sliding sealing relation with respect to the bushing sleeve. An inner sleeve 30 is connected to a ring 31 having O-ring seals 32 in engagement with the inner surface of the piston sleeve 28. The first tu-bular member forms an oxygen passage 33 in communication with the chamber 22.
A first pipe ex-tension 34 is connected at its upper end to a flange 35 providing support for hanger members 12 from which the lance is hung when used in the vertical : 25 operating position~ A water inlet connection 36 is connected to :~:
the pipe 34. The pipe 34 is connected to a flange 37 in turn :;
connected to a flange 38 by fasteners 39. The flange 37 is : connected to a ring 40 in turn connected to a second tubular mem-ber 41 providing a water inlet passage 42 communicating with the inlet connection 36. A water outlet connection 43 communi-cates with an outlet passage 44 provided by an outer third tubul.ar member 45.
1~)83L~46 A nozzle head or lanee tip is designatecl at 46 as best shown in FIGS. 1 and 3. As shown in FIG. 3 the nozzle 46 is provided with a cylindrical skirt 47 connected to the third or outer tubular member 45. The tubular members 27, 41 and 45 may comprise a plurality of individual sections as shown in FIG. 3 which are welded together for manufacturing reasons.
The tubular member 41 includes a section 41a which is in over-lapping relation with respect to the lower portion of the tubular member 41. The nozzle is provided at its lower end with a water chamber 48 whieh eommunieates with the inlet pass.lgc 42 and outlet passage 44. The oxygen passage communicates with an oxygen chamber 49 directing oxygen through one or more discharge orifiees 50 to a suitable basie oxygen furnaee vessel (not shown).
An arrangement and adaptation for supporting a sensing deviee is indieated generally at 51. This ineludes :~ a eentral pipe 52 provided with eentering spaces 52' to centrally spaee and support the eentral pipe relative to the tubular member 27.
The lower end of the sensor mounting pipe 52 is eonneeted to a eylindrieal sleeve 53 having a spider type arrangement ineluding lugs 54 eonneeted thereto. The lugs 54 are seeured in slots 55 provided in bracke-ts 56 to which they are seeured by taek welding after alignment. The lower elld of the sleeve 53 is sealingly seeured to a eylindrical block 57 having a bore 57' within which a cylindrieal housing 60 is supported. The housing 60 is supported by a eircumferential flange 60' and eap serews 61 on bloek 57. A top plate 63 supports a eonventional eleetrieal outlet 64 whieh is eonneeted to an eleetrieal eo-axial eable or collductor G5. l'lle colldllct:or cable may be straight or of serpentine eonfiguration as dis-elosed.
As best shown in FIG. 2, the conductor cable 65 extends upwardly wi-thin the pipe 51 in-to a conical adapter 66, in turn connected to a third piston sleeve 67. The third piston sleeve 67 is in engagement with -the inner surface of the bushing sleeve 13 and is sealed relative thereto by O-riny seals 68.
A bracket 69 is connec-ted to lugs 70 carried by the adapter 66 by means of screws 71. A lock sleeve or screw type connector 72 supports the cable 65 on the bracket 69. The cable is formed with an expansion loop 72 dlsposed within the piston sleeve 67.
A lock sleeve 73 also secures the cable 65 to the plate 15. Lock sleeves 72 and 73 are of a conventional type for tightly securing the cable to the support 69 allcl plate 15. Thus the cable disposed below the suppor-t 69 is held within the pipe 52 in taut relation.
The modified constructions FIGS. 6 discloses ; a lower portion of a modified lance. This lance is particularly `
adapted for a single orifice lance though it may be adapted to a multi-orifice lance where the signals are to be received through a single orifice.
In this modification a section of pipe 53' is connected to the lower end of the sleeve 53 and is disposed .: ; ' angularly to be in axial alignmen-t with the discharge orifice 50. The other structure is similar and the same reference - characters are applied. ~
FIG. 7 discloses a lance similar to FIG. 6 .
with an adapter 82 connected to plate 80 on block 57 by means of cap screws 61 through a circumferential flange 85 provided on said adapter.
The adapter 82 includes a cave shaped opening 83 communicating with a holder opening or socket 81 within which may be secllred a probe thermocouple or othcr instrument designated at 84.
FIG. 9 discloses a modified top portion oE the lance similar to FIG. 2 with the same reference characters applied. ~lowever in this case it will be noted that the third piston sleeve 67 has an outside diameter which is less than the diameter of the inner sleeve 30. This permits -the sensing device arrangement 51 including centered pipe 52 third piston sleeve 67 and other associated structure to be drawn downwardly through the sleeve 30 for disassembly when required. Thus t]lis modifi-cation permits withdrawl of the arrangement 51 through the top or through the bottom of the lance as desired.
, ' The Operation In operation the lance 10 is hung ver-tically from the hanger 12 from suitable hoist structure and the nozzle is disposed within a B.O.F. vessel. Oxygen is directed through the inlet 21 through chamber 22 passage 33 chamber 49 and outwardly through the nozzles onto the surface of a molten bath.
The lance is cooled by water entering into the water inlet connection 36 whereupon it circulates downwardly through passage 42 upwardly through water outlet connection 43. The O-rings seal the upper end of the pipe 52 against the entrance of oxygen and the lower sleeve structure 60 and block 57 prevent the entrance of any oxygen into the pipe 52. Further the interior of the pipe 52 may be vented as disclosed in U. S.~
patent 3 827 632 to discharge any oxygen which may be inadver-tently leaked into the pipe 52.
An electronic unit or any other type of sensor may be placed within the housing 60 whlcll provicleci a space which is isolated from the pipe 52. A sensor may be any signal conducting medium such as cable wire light transmitting medium or sonic transmitting medium. It may _7_ ~8~946 be a fiber optic conductor. The sensor which may be associated with the lance may be a probe or thermocouple as shown in FIG.
7, and is not limited to any type, it is intellded tll;lt it m.ly observe, see, read, receive, monitor and transmit conditions within -the refractory. Such a sensor may be plugged into the electrical co-axial cable and will function to receive occurrences emanating from the refractory through the oxygen discharge orifice. Thus occurrences in thè bath may be electronically communica-ted through the co-axial cable to suitable receiving means provided for this purpose. The sensor and receiving means will function to permit analysis of certain ba-th conditions which might be metallurgical, relate to sound and light or be pyrometric, etc., -the primary purpose of the present invention being to provide an arrangemént which can easily accommodate sensing devices in a lance that will function effectively and permit the safe, quic]c and reliable installa-tion of such sensing devices.
The inner pipe will be protected against the inadvertent entrance and build up of oxygen in the pipe 52 by suitable vent means above referred to or by signalling means as deemed necessary for the beneficiation of the process involved.
Since the pipe 5~ is provided with the piStOIl sleeve 67 and first pipe 20, bushing sleeve 13, arrangement can contract and expand vertically as necessary to accommodate the extreme temperatures to which oxygen lances are subjected.
Such expansion and contraction over the length of a lance assembly is considerable and the expansion loop 72 permits this to take place. The present arrangement can be utilized in various lances of different designs which have in common the contraction and expansion requirements described above.
.
L9d~6 The arrangement may be utilized with any gas lance or oxygen-oil or oxygen fuel burner lance where some form of sensor or information gatllerillg means is to l~c incorporated. The central tube provides a safe and yet effective construc-tion and shielding means for the cable conductor.
The arrangement shown may be also be u-tilized with any signal or information -transmittal method such as but not limited to light usage or fiber optic transfer medium as well as the transmittal of an electrical signal by cable.
It provides a safe and economlc manner in which the desired result may be achieved.
.
Claims (5)
1. A gas injection lance for insertion into a vessel for processing molten metal comprising:
a nozzle head at one end adapted to be positioned proximate to the molten metal, a plurality of concentric gas and coolant-carrying tubes, at least the innermost gas-carrying tube of which is connected to and in communication with said nozzle head for discharge gas therethrough, a sensor-mounting support positioned within said gas-carrying tube, a sensor mounted by the sensor-mounting support proximate to and out of contact with said nozzle head and in axially spaced relation thereto, said support including a sleeve portion, means mounting said sleeve portion from the innermost tube comprising bracket means extending from the innermost tube toward said support, and having slot means in the bracket means open axially toward one end of the lance, lug means radially extending from said sleeve portion and extending into said slot means, and means holding said lug means within said slot means.
2. The gas injection lance according to Claim 1. wherein said mounted sensor and nozzle head define a gas-fillable thermal buffer zone chamber, said nozzle head serving as a primary heat shield between the molten metal and said sensor, said buffer zone chamber being the sole body between the sensor and nozzle head and providing a supplemental dynamic heat shield between said nozzle head and said sensor,
a nozzle head at one end adapted to be positioned proximate to the molten metal, a plurality of concentric gas and coolant-carrying tubes, at least the innermost gas-carrying tube of which is connected to and in communication with said nozzle head for discharge gas therethrough, a sensor-mounting support positioned within said gas-carrying tube, a sensor mounted by the sensor-mounting support proximate to and out of contact with said nozzle head and in axially spaced relation thereto, said support including a sleeve portion, means mounting said sleeve portion from the innermost tube comprising bracket means extending from the innermost tube toward said support, and having slot means in the bracket means open axially toward one end of the lance, lug means radially extending from said sleeve portion and extending into said slot means, and means holding said lug means within said slot means.
2. The gas injection lance according to Claim 1. wherein said mounted sensor and nozzle head define a gas-fillable thermal buffer zone chamber, said nozzle head serving as a primary heat shield between the molten metal and said sensor, said buffer zone chamber being the sole body between the sensor and nozzle head and providing a supplemental dynamic heat shield between said nozzle head and said sensor,
Claim 2 - cont'd ...
said nozzle head providing a constricted unobstructed passage for draining a pressurized reservoir of gases from said buffer zone chamber, and said chamber providing a gas-enveloping replenishable heat barrier about said sensor.
said nozzle head providing a constricted unobstructed passage for draining a pressurized reservoir of gases from said buffer zone chamber, and said chamber providing a gas-enveloping replenishable heat barrier about said sensor.
3. The gas injection lance in accordance with Claim 1, wherein said sensor-mounting support comprises a tubular member, and including electrical socket means on said sensor mounting support and connected to flexible electrical conductor means.
4. The gas injection lance in accordance with Claim 3, wherein said flexible conductor means is adapted to accommodate vertical expansion and contraction of said tubes and tubular members.
5. The gas injection lance in accordance with Claim 1, 2 or 3 wherein said innermost gas-carrying tube includes an extension extending angularly in axial alignment with a discharge orifice of said nozzle head, and said sensor mounting support is connected thereto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA338,101A CA1081946A (en) | 1976-11-01 | 1979-10-22 | Oxygen lance and sensing adapter arrangement |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US737,637 | 1976-11-01 | ||
| US05/737,637 US4106756A (en) | 1976-11-01 | 1976-11-01 | Oxygen lance and sensing adapter arrangement |
| CA279,018A CA1081945A (en) | 1976-11-01 | 1977-05-24 | Oxygen lance and sensing adapter arrangement |
| CA338,101A CA1081946A (en) | 1976-11-01 | 1979-10-22 | Oxygen lance and sensing adapter arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1081946A true CA1081946A (en) | 1980-07-22 |
Family
ID=27165091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA338,101A Expired CA1081946A (en) | 1976-11-01 | 1979-10-22 | Oxygen lance and sensing adapter arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1081946A (en) |
-
1979
- 1979-10-22 CA CA338,101A patent/CA1081946A/en not_active Expired
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