CA2064417A1 - Multifluid nozzle for blowing gaseous fluids into metal-containing molten materials - Google Patents
Multifluid nozzle for blowing gaseous fluids into metal-containing molten materialsInfo
- Publication number
- CA2064417A1 CA2064417A1 CA002064417A CA2064417A CA2064417A1 CA 2064417 A1 CA2064417 A1 CA 2064417A1 CA 002064417 A CA002064417 A CA 002064417A CA 2064417 A CA2064417 A CA 2064417A CA 2064417 A1 CA2064417 A1 CA 2064417A1
- Authority
- CA
- Canada
- Prior art keywords
- nozzle
- grooves
- multifluid
- annular
- core
- 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.)
- Abandoned
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
- B22D1/002—Treatment with gases
- B22D1/005—Injection assemblies therefor
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Nozzles (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
ABSTRACT
A multifluid nozzle is described, which serves to blow gaseous fluids into metal-containing molten materials and which will effect a thorough and fast mixing of the fluids when they have left the nozzle and even when material of the nozzle has been consumed. A nozzle core (1) consists of a round-section solid rod, which is formed in its outside surface with helical grooves (2), which have a lead angle of 15 to 60 degrees relative to the nozzle axis.
The nozzle core (1) is surrounded by one or more annu-lar nozzle tubes (3, 4), which have a smooth inside surface and are formed on their outside surface with grooves (5, 6). The outermost nozzle tube (4) is sur-rounded by an annular outer tube (7), which has a smooth inside surface.
A multifluid nozzle is described, which serves to blow gaseous fluids into metal-containing molten materials and which will effect a thorough and fast mixing of the fluids when they have left the nozzle and even when material of the nozzle has been consumed. A nozzle core (1) consists of a round-section solid rod, which is formed in its outside surface with helical grooves (2), which have a lead angle of 15 to 60 degrees relative to the nozzle axis.
The nozzle core (1) is surrounded by one or more annu-lar nozzle tubes (3, 4), which have a smooth inside surface and are formed on their outside surface with grooves (5, 6). The outermost nozzle tube (4) is sur-rounded by an annular outer tube (7), which has a smooth inside surface.
Description
2~6~17 This invention relates to a multifluid nozzle for blowing gaseous fluids into metal-containing molten materials, which nozzle compr.ises a plurality of flow-guiding members, which concentrically surround each other and at least one of which is provided with swirling means.
In some metallurgical processes used in ferrous and nonferrous metallurgy, gaseous fluids and optionally also fine-grained and liquid fluids are injected by so-called submerged nozzles into a bath of metal or slag.
Submerged nozzles are arranged either in the bottom or in the side wall of the reactor. In some cases the injected fluids are intended to interreact in the molten material as they leave the nozzle tip. A fast ~
20~17 and intense mixing of said fluids with each otheris required ~or a good reaction.
For instance, European Patent Speci~
cation 385~ describes a direct winning of lead from sulfide ores in the QSL process, in which oxygen-containing Oases and a nozzle-protecting gas are in-jected through multifluid noz7,1es into the molten material in the oxidizing zone and the reducing zone.
Besides, a carbonaceous reducing agent is blown through the multifluid nozzles into the molten material in -the reducing zone. ~he carbonaceous reducing age~t and the oxygen~containiDg gas together consti-tute the reducing gas, by which a reduction is effec~ed in the slag layer of the reducing zone. '~o achieve a good reducing action in the slag layer the carbonaceous reducing agent and the oxygen-containing gas which have left the nozzle tip must be mixed quickly, in-tensely and in a controlled manner and that mixing must be ach~ed even when tha nozzle tip has been consumed.
Published German Application 28 19 587 discloses for use ~Ni-th molten nonferrous metal a multi-fluid lance, which consists of three tubes, which con-cent~ically surround each other. A helical preswirling insert is disposed in the annulus between -the outer and intermediate tubes. Fuel is inje~t~d through the central 20~17 tube, flux through the annulus betwoen the i~termediate and central tubes, and oxygen-containing gas through the annulus between the outer and intermedia-te tubes.
lhe central and intermediate tubes preferably terminate at a distance from the end of the outer tube so that a free space extends from the ends of the central and intermediate tubes to the end of -the outer tube and th~
fluids are mixed in said free space. The out~t end of the lance is initially contacted with molten slag, whereafter gas is blown through the lance so that the outlet end is sheathed by solidified slag. The thus sheathed end is then immersed into the metallurgical bath. ~hereas the fluids are mixed in the free space before they enter the molten materlal, that design can-not be adopted for submerged nozzlesO
~ ustrian Patent Specification 315,216 discloses for use in the refining of crude iron a mul-ti-fuel nozzle comprising two tubes, vhich concentrically surround each other and betv~een them define an annulus, which conbains a helical wire or axially parallel ribs or a porous material. The jacket gas or cooling gas flowing through that annulus is intended to tightly and uniformly enclose the oxygen jet floving out o~e inner tube so that a mixing is initially avoided.
It is an object of the invention to provide 2~417 a multifluid nozzle which effects a fast, intense, and controlled mixin~ of the blown fluids and which maintains that mixing also when the nozzle tip has been consumed in the molten materialO
In the multifluid nozzle described first hereinbefore that object is accomplished in accordance with the invention in that the innermost flow-guiding memher (1) consists of a round~section solid nozzle core and is provided on its,outside sur-face with helical grooves (2), which have alead angle of 15 to 60 degrees relative to the axis of the nozzle, the nozzle core (1) is surrounded by one or more an..ular nozzle tubes (3, ~), which have a s~octh inside surface and are formed on their outside sur-face with ~rooves (5, 6), or ~e nozzle core ~1) has a smooth outside surface and the next ad~cent annular nozzle tube (3) is formed on its irside surface w,ith helical groov~s (5) and the outermost r,ozzle tube (4) is surrounded by an annular outer tube (7), which has a smooth inside surface.
4s regards the nixing of the fluids the helical groo~es may be provided, on principle, on the outside surface of the nozzle core or on the inside surface of the next adjacent annular nozzle t~be but they are desirably provided on the ou-tside surface of 2064~7 the nozzle core because it would be very expensive to form them on the inside surface of the annular nozzle tube owing to its small diameterO
If the multifluid nozzle consti-tutes a two-fluid r,ozzle, it wil] consist of the nozzle core, an annular nozzle tube and the annular outer tube. If the multifluid nozzle constitutes a three-fluid nozzle, it will comprise two annular nozzle tubes.
~he grooves are milled into the outside surface of the nozzle core and of the annular nozzle tubes and ma~
have any desired shape in cross-section and have in general an angular or -ectangular shape in cross-section.
The outside diameter of the nozzle core, the inside a~d outside diameters of the annular nozzle tubes and the inside diameter of the outer tube are so matched to each other that it is just possible to ~ush the flow-guiding members into each other. In general, the car-bonaceous reducing agent, such as natural gas, is blown throu~h the grooves formed in the nozzle core and the oxygen-containing gas, such as commercially pure oxygen, is blown through the grooves Gf the annular nozzle tube next adjacent to the nozzle core. In three-fluid nozzles an inert gas or a comhustlble gas such as nitrogen or natural gas i9 generally blo~Nn as a cooling gas through -the outer annular nozzle tube. The grooves are .. . . .
20~4~17 arranged with such a spacing from each other and in such a manner that a complete or partial overlap of adaacent fluid jets will result at a small distance from the nozzle tip. It is desirable t~ ~e multi-fluid nozzle described hereinbefore is consumable only in part of its length and that that consumable part i9 welded to the remaining or supply part of the nozzle. In the supply part the flow-guiding mem-bers are not formed with grooves but are smooth mem-bers, which between them define annular spaces, which open into the grooves.
~ he helical grooves formed on the nozzle core or in the inside sur~ace of the next adjacent annular nozzle tube and having the stated lead angle will pro-duce the result that the oxygen jets and the fu~ jets meet close to the mouth of the nozzle at an angle which promotes the mixing. That condition will be maintained even when the nozzle tip has ~een consumed.
~ ccording to a preferred feature the grooves (5, 6) formed in one or more of the annular nozzles tubes (3, 4) are axia~y parallel. This will also result in a good mixing whereas the machining of the groo~es into the annula~ nozzle tubes will be ~ss expensive.
~ ccording to a preferred feature the grooves (5~ 6) of one or more of the annular nozzle tubes (~, 4) are helical and have a lead angle of' 15 to 60 degrees relative to the nozzle axis, which lead angle is opposita to the lead angle of the grooves in the nozzle core (l)o If in a three-fluid nozzle only one annular nozzle tube is formed with helical grooves, the inner annular nozzle tube will be formed with the helical grooves because the reac-tants will flow out adiacent to the nozzle core and the next adjacent annular nozzle tube. By that arrange-ment or by the provision of helical grooves also in the outer annular nozzle tube the mixing will be further improvedO
~ ccording to a preferred feature the grooves (2, 5, 6) have a lead angle o~ 20 to 40 degrees. Particularly good mixing results will be pro-duced by grooves having such a lead angle.
According to a preferred faature the grooves (2, 5, 6) have such a configuration that adjacent gas jets will meet at-a point which is spaced from the nozzle tip by not more than ~ to lC times the hydraulic diameter of a helical groove (2). ~he hydrau-lic diameter of a groove is defined as 4 times tbe area divided by the girth of the cross-section of a groove. It is assumed that each jet spreads at an a~l 20~417 of 20 degrees. Adiacent gas jets are jets from two adja-cent annular sets of grooves.
~ he invention will be explained in more detail hereinafter with refe:rence to the drawings, whic~
are e~larged for greater clearness.
Figure 1 is a transverse sectional view taken on line I-I in Figure 2.
Figure 2 is a longitud~al sectional view sbowing a multifluid nozzle with its supply part cut off.
Figure 3 shows the core member of the nozzle with the machined helical grooves OD the outside surface of the nozzle coreO
~ igure 4 is a transverse sectional view taken on line 2-2 in Figure 2.
'~he core 1 of the nozzle is provided on its outside surface with helical grooves 2 a~d is sur-rounded b~ the annular nozzle tube 3~ which is formed on its outside surface with axially parallel grooves 5. The annular nozzle tube 3 is surrounded by a further annular nozzle tube 4, which is formed o~ its outside surface with axially parallel grooves 6 and lS surrounded by the outer tube 7, which has a smooth inside surface. Figure 2 shows a consumable part, which is constituted by that part of the multifluid nozzle which is dispoæd on the right of the welded joint 8 whereas that part which is 2064~17 disposed on the left of the welded joi~t 8 constitutes a supply part~ As is apparent from Figure 4 ~he nozzle core 1a, the annula~hozzle tube 3a and the anDular nozzle tube ~a of the supply part have smooth outside sur~aces and the annular spaces 2a, 5a, and 6a defined in the ~upply part between the nozzle core, ~he a~nular nozzle tubes and the outer tube open at the welded joint 8 into the grooves which are formed in the no~ le core and annular nozzle tubes of the consum~le part.
EXAMP~E
~ he nozzle core 1 has an outside dia-meter of 16 mm and i8 formed with 14 helical grooves 2, which are regularly spaced around its periphery and are 1.6 mm x 1.8 mm in cross-section, The annular nozzle tube 3 has an outside diameter of 22 mm and is formed with 14 axially parallel grooves 5, which are 2.5 mm x 1 mm in CrQSs-section. The annular nozzle tube 4 has an outside diameter of 27.2 mm and has 14 axi~ly parallel grooves 6, which are 1 mm x 1 mm in cross-section. The helical grooves 2 on the nozzle core l have a lead angle of 30 degrees relative to the nozzle axis.
In some metallurgical processes used in ferrous and nonferrous metallurgy, gaseous fluids and optionally also fine-grained and liquid fluids are injected by so-called submerged nozzles into a bath of metal or slag.
Submerged nozzles are arranged either in the bottom or in the side wall of the reactor. In some cases the injected fluids are intended to interreact in the molten material as they leave the nozzle tip. A fast ~
20~17 and intense mixing of said fluids with each otheris required ~or a good reaction.
For instance, European Patent Speci~
cation 385~ describes a direct winning of lead from sulfide ores in the QSL process, in which oxygen-containing Oases and a nozzle-protecting gas are in-jected through multifluid noz7,1es into the molten material in the oxidizing zone and the reducing zone.
Besides, a carbonaceous reducing agent is blown through the multifluid nozzles into the molten material in -the reducing zone. ~he carbonaceous reducing age~t and the oxygen~containiDg gas together consti-tute the reducing gas, by which a reduction is effec~ed in the slag layer of the reducing zone. '~o achieve a good reducing action in the slag layer the carbonaceous reducing agent and the oxygen-containing gas which have left the nozzle tip must be mixed quickly, in-tensely and in a controlled manner and that mixing must be ach~ed even when tha nozzle tip has been consumed.
Published German Application 28 19 587 discloses for use ~Ni-th molten nonferrous metal a multi-fluid lance, which consists of three tubes, which con-cent~ically surround each other. A helical preswirling insert is disposed in the annulus between -the outer and intermediate tubes. Fuel is inje~t~d through the central 20~17 tube, flux through the annulus betwoen the i~termediate and central tubes, and oxygen-containing gas through the annulus between the outer and intermedia-te tubes.
lhe central and intermediate tubes preferably terminate at a distance from the end of the outer tube so that a free space extends from the ends of the central and intermediate tubes to the end of -the outer tube and th~
fluids are mixed in said free space. The out~t end of the lance is initially contacted with molten slag, whereafter gas is blown through the lance so that the outlet end is sheathed by solidified slag. The thus sheathed end is then immersed into the metallurgical bath. ~hereas the fluids are mixed in the free space before they enter the molten materlal, that design can-not be adopted for submerged nozzlesO
~ ustrian Patent Specification 315,216 discloses for use in the refining of crude iron a mul-ti-fuel nozzle comprising two tubes, vhich concentrically surround each other and betv~een them define an annulus, which conbains a helical wire or axially parallel ribs or a porous material. The jacket gas or cooling gas flowing through that annulus is intended to tightly and uniformly enclose the oxygen jet floving out o~e inner tube so that a mixing is initially avoided.
It is an object of the invention to provide 2~417 a multifluid nozzle which effects a fast, intense, and controlled mixin~ of the blown fluids and which maintains that mixing also when the nozzle tip has been consumed in the molten materialO
In the multifluid nozzle described first hereinbefore that object is accomplished in accordance with the invention in that the innermost flow-guiding memher (1) consists of a round~section solid nozzle core and is provided on its,outside sur-face with helical grooves (2), which have alead angle of 15 to 60 degrees relative to the axis of the nozzle, the nozzle core (1) is surrounded by one or more an..ular nozzle tubes (3, ~), which have a s~octh inside surface and are formed on their outside sur-face with ~rooves (5, 6), or ~e nozzle core ~1) has a smooth outside surface and the next ad~cent annular nozzle tube (3) is formed on its irside surface w,ith helical groov~s (5) and the outermost r,ozzle tube (4) is surrounded by an annular outer tube (7), which has a smooth inside surface.
4s regards the nixing of the fluids the helical groo~es may be provided, on principle, on the outside surface of the nozzle core or on the inside surface of the next adjacent annular nozzle t~be but they are desirably provided on the ou-tside surface of 2064~7 the nozzle core because it would be very expensive to form them on the inside surface of the annular nozzle tube owing to its small diameterO
If the multifluid nozzle consti-tutes a two-fluid r,ozzle, it wil] consist of the nozzle core, an annular nozzle tube and the annular outer tube. If the multifluid nozzle constitutes a three-fluid nozzle, it will comprise two annular nozzle tubes.
~he grooves are milled into the outside surface of the nozzle core and of the annular nozzle tubes and ma~
have any desired shape in cross-section and have in general an angular or -ectangular shape in cross-section.
The outside diameter of the nozzle core, the inside a~d outside diameters of the annular nozzle tubes and the inside diameter of the outer tube are so matched to each other that it is just possible to ~ush the flow-guiding members into each other. In general, the car-bonaceous reducing agent, such as natural gas, is blown throu~h the grooves formed in the nozzle core and the oxygen-containing gas, such as commercially pure oxygen, is blown through the grooves Gf the annular nozzle tube next adjacent to the nozzle core. In three-fluid nozzles an inert gas or a comhustlble gas such as nitrogen or natural gas i9 generally blo~Nn as a cooling gas through -the outer annular nozzle tube. The grooves are .. . . .
20~4~17 arranged with such a spacing from each other and in such a manner that a complete or partial overlap of adaacent fluid jets will result at a small distance from the nozzle tip. It is desirable t~ ~e multi-fluid nozzle described hereinbefore is consumable only in part of its length and that that consumable part i9 welded to the remaining or supply part of the nozzle. In the supply part the flow-guiding mem-bers are not formed with grooves but are smooth mem-bers, which between them define annular spaces, which open into the grooves.
~ he helical grooves formed on the nozzle core or in the inside sur~ace of the next adjacent annular nozzle tube and having the stated lead angle will pro-duce the result that the oxygen jets and the fu~ jets meet close to the mouth of the nozzle at an angle which promotes the mixing. That condition will be maintained even when the nozzle tip has ~een consumed.
~ ccording to a preferred feature the grooves (5, 6) formed in one or more of the annular nozzles tubes (3, 4) are axia~y parallel. This will also result in a good mixing whereas the machining of the groo~es into the annula~ nozzle tubes will be ~ss expensive.
~ ccording to a preferred feature the grooves (5~ 6) of one or more of the annular nozzle tubes (~, 4) are helical and have a lead angle of' 15 to 60 degrees relative to the nozzle axis, which lead angle is opposita to the lead angle of the grooves in the nozzle core (l)o If in a three-fluid nozzle only one annular nozzle tube is formed with helical grooves, the inner annular nozzle tube will be formed with the helical grooves because the reac-tants will flow out adiacent to the nozzle core and the next adjacent annular nozzle tube. By that arrange-ment or by the provision of helical grooves also in the outer annular nozzle tube the mixing will be further improvedO
~ ccording to a preferred feature the grooves (2, 5, 6) have a lead angle o~ 20 to 40 degrees. Particularly good mixing results will be pro-duced by grooves having such a lead angle.
According to a preferred faature the grooves (2, 5, 6) have such a configuration that adjacent gas jets will meet at-a point which is spaced from the nozzle tip by not more than ~ to lC times the hydraulic diameter of a helical groove (2). ~he hydrau-lic diameter of a groove is defined as 4 times tbe area divided by the girth of the cross-section of a groove. It is assumed that each jet spreads at an a~l 20~417 of 20 degrees. Adiacent gas jets are jets from two adja-cent annular sets of grooves.
~ he invention will be explained in more detail hereinafter with refe:rence to the drawings, whic~
are e~larged for greater clearness.
Figure 1 is a transverse sectional view taken on line I-I in Figure 2.
Figure 2 is a longitud~al sectional view sbowing a multifluid nozzle with its supply part cut off.
Figure 3 shows the core member of the nozzle with the machined helical grooves OD the outside surface of the nozzle coreO
~ igure 4 is a transverse sectional view taken on line 2-2 in Figure 2.
'~he core 1 of the nozzle is provided on its outside surface with helical grooves 2 a~d is sur-rounded b~ the annular nozzle tube 3~ which is formed on its outside surface with axially parallel grooves 5. The annular nozzle tube 3 is surrounded by a further annular nozzle tube 4, which is formed o~ its outside surface with axially parallel grooves 6 and lS surrounded by the outer tube 7, which has a smooth inside surface. Figure 2 shows a consumable part, which is constituted by that part of the multifluid nozzle which is dispoæd on the right of the welded joint 8 whereas that part which is 2064~17 disposed on the left of the welded joi~t 8 constitutes a supply part~ As is apparent from Figure 4 ~he nozzle core 1a, the annula~hozzle tube 3a and the anDular nozzle tube ~a of the supply part have smooth outside sur~aces and the annular spaces 2a, 5a, and 6a defined in the ~upply part between the nozzle core, ~he a~nular nozzle tubes and the outer tube open at the welded joint 8 into the grooves which are formed in the no~ le core and annular nozzle tubes of the consum~le part.
EXAMP~E
~ he nozzle core 1 has an outside dia-meter of 16 mm and i8 formed with 14 helical grooves 2, which are regularly spaced around its periphery and are 1.6 mm x 1.8 mm in cross-section, The annular nozzle tube 3 has an outside diameter of 22 mm and is formed with 14 axially parallel grooves 5, which are 2.5 mm x 1 mm in CrQSs-section. The annular nozzle tube 4 has an outside diameter of 27.2 mm and has 14 axi~ly parallel grooves 6, which are 1 mm x 1 mm in cross-section. The helical grooves 2 on the nozzle core l have a lead angle of 30 degrees relative to the nozzle axis.
Claims (5)
1. A multifluid nozzle for blowing gaseous fluids into metal-containing molten materials, which nozzle comprises a plurality of flow-guiding members, which concentrically surround each other and one of which is provided with swirling means; characterized in that the innermost flow-guiding member (1) consists of a round-section solid nozzle core (1) and is provided on its outside surface with helical grooves (2), which have a lead angle of 15 to 60 degrees relative to the axis of the nozzle, the nozzle core (1) is surrounded by one or more annular nozzle tubes (3, 4), which have a smooth inside surface and are formed on their out-side surface with gives (5, 6), or the nozzle core (1) has a smooth outside surface and the next adjacent annular nozzle tube (3) is formed on its inside surface with helical grooves (5) and the outermost nozzle tube (4) is surrounded by an annular outer tube (7), which has a smooth inside surface.
2. A multifluid nozzle according to claim 1, characterized in that the grooves (5, 6) formed in one or more of the annular nozzle tubes (3, 4) are axially parallel.
3. A multifluid nozzle according to claim 1, characterized in that the grooves (5, 6) of one or more of the annular nozzle tubes (3, 4) are helical and have a lead angle of 15 to 60 degrees relative to the nozzle axis, which lead angle is opposite to the lead angle of the grooves in the nozzle core (1).
4. A multifluid nozzle according to any of claims 1 to 3 9 characterized in that the grooves (2, 5, 6) have a lead angle of 20 to 40 degrees.
5. A multifluid nozzle according to any of claims 1 to 3, characterized in that the grooves (2, 5, 6) have such a configuration that adjacent gas jets will meet at a point which is spaced from the nozzle top by not more than 6 to 10 times the hydraulic diameter of a helical groove (2).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4112836.2 | 1991-04-19 | ||
| DE4112836A DE4112836A1 (en) | 1991-04-19 | 1991-04-19 | Gas jet assembly - has solid inner with outer spiral channel and concentric channelled grooves for consistent gas mixtures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2064417A1 true CA2064417A1 (en) | 1992-10-20 |
Family
ID=6429951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002064417A Abandoned CA2064417A1 (en) | 1991-04-19 | 1992-03-30 | Multifluid nozzle for blowing gaseous fluids into metal-containing molten materials |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR920019951A (en) |
| CA (1) | CA2064417A1 (en) |
| DE (1) | DE4112836A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929802B (en) * | 2009-06-25 | 2012-09-05 | 中国恩菲工程技术有限公司 | Side-blown spray gun |
| CN107385153A (en) * | 2017-09-05 | 2017-11-24 | 武汉科技大学 | The air brick that the motion state stirring of metal bath in metallurgical furnace can be helically flowed |
| CN114277216A (en) * | 2021-12-27 | 2022-04-05 | 辽宁丰德耐磨新材料制品有限公司 | In-ladle argon blowing stirring method for production of wear-resistant steel balls |
| CN116043044A (en) * | 2022-12-01 | 2023-05-02 | 徐应学 | Preparation process of high-strength aluminum alloy precision casting plate |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4406563A1 (en) * | 1994-02-23 | 1995-08-24 | Matthias Keuter | Oxygen-blown converter blowing nozzle |
| CA2367586A1 (en) * | 2002-01-14 | 2003-07-14 | Michael F. Harasym | Apparatus to facilitate opening of molten metal casting vessel |
| CN105737614B (en) * | 2016-04-01 | 2018-06-19 | 中国恩菲工程技术有限公司 | For the spray gun of side-blown submerged combustion molten bath metallurgy stove and with its metallurgical furnace |
-
1991
- 1991-04-19 DE DE4112836A patent/DE4112836A1/en not_active Withdrawn
-
1992
- 1992-03-30 CA CA002064417A patent/CA2064417A1/en not_active Abandoned
- 1992-04-18 KR KR1019920006548A patent/KR920019951A/en not_active Application Discontinuation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929802B (en) * | 2009-06-25 | 2012-09-05 | 中国恩菲工程技术有限公司 | Side-blown spray gun |
| CN107385153A (en) * | 2017-09-05 | 2017-11-24 | 武汉科技大学 | The air brick that the motion state stirring of metal bath in metallurgical furnace can be helically flowed |
| CN114277216A (en) * | 2021-12-27 | 2022-04-05 | 辽宁丰德耐磨新材料制品有限公司 | In-ladle argon blowing stirring method for production of wear-resistant steel balls |
| CN116043044A (en) * | 2022-12-01 | 2023-05-02 | 徐应学 | Preparation process of high-strength aluminum alloy precision casting plate |
Also Published As
| Publication number | Publication date |
|---|---|
| KR920019951A (en) | 1992-11-20 |
| DE4112836A1 (en) | 1992-10-22 |
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