Apparatus for refining of steel

Claim 2

A water-cooled oxygen injection submergible lance for injecting oxygen below the surface of a molten steel producing bath from above the molten bath comprising: an upper lance section and a tip section each having a central oxygen gas conduit and coolant conduit means surrounding the oxygen conduit, a replaceable and consumable submersion nozzle being connected with the lower end of the tip section and including a connector tube means being releasably coupled with the lower end of the tip section and having an oxygen gas exit passage and a refractory sheath of highly thermal insulative material surrounding said connector tube means and insulating the connector tube means from premature consumption by the molten bath, said connector tube means including an upper coupler tube portion releasably connectible with the lower part of the tip section and a lower portion defining an oxygen exit tube, said refractory sheath surrounding and being carried by said oxygen exit tube, said oxygen exit tube being provided with fastener means being imbedded in the refractory sheath and said fastener means attaching to said oxygen exit tube, and said fastener means including a coil immersed in the refractory sheath and being tightly wound about said oxygen exit tube.

Claim 3

A water-cooled oxygen injection submergible lance for injecting oxygen below the surface of a molten steel producing bath from above The molten bath comprising; an upper lance section and a tip section each having a central oxygen gas conduit and coolant conduit means surrounding the oxygen conduit, a replaceable and consumable submersion nozzle being connected with the lower end of the tip section and including a connector tube means being releasably coupled with the lower end of the tip section and having an oxygen gas exit passage and a refractory sheath of highly thermal insulative material surrounding said connector tube means and insulating the connector tube means from premature consumption by the molten bath, said connector tube means including an upper coupler tube portion releasably connectible with the lower part of the tip section and a lower portion defining an oxygen exit tube, said refractory sheath surrounding and being carried by said oxygen exit tube, said oxygen exit tube being provided with fastener means being imbedded in the refractory sheath and said fastener means attaching to said oxygen exit tube, and said fastener means including an asbestos-like rope material spirally wound about said oxygen exit tube.

Claim 4

A water-cooled oxygen injection submergible lance for injecting oxygen below the surface of a molten steel producing bath from above The molten bath comprising; an upper lance section and a tip section each having a central oxygen gas conduit and coolant conduit means surrounding the oxygen conduit, a replaceable and consumable submersion nozzle being connected with the lower end of the tip section and including a connector tube means being releasably coupled with the lower end of the tip section and having an oxygen gas exit passage and a refractory sheath of highly thermal insulative material surrounding said connector tube means and insulating the connector tube means from premature consumption by the molten bath, said connector tube means including an upper coupler tube portion releasably connectible with the lower part of the tip section and a lower portion defining an oxygen exit tube, said refractory sheath surrounding and being carried by said oxygen exit tube, said oxygen exit tube being provided with fastener means being imbedded in the refractory sheath and said fastener means attaching to said oxygen exit tube, and said fastener means including an asbestos-like rope material spirally wound about said oxygen exit tube.

Claim 5

A water-cooled oxygen injection submergible lance for injecting oxygen below the surface of a molten steel producing bath from above the molten bath comprising: an upper lance section and a tip section each having a central oxygen gas conduit and coolant conduit means surrounding the oxygen conduit, a replaceable and consumable submersion nozzle being connected with the lower end of the tip section and including a connector tube means being releasably coupled with the lower end of the tip section and having an oxygen gas exit passage and a refractory sheath of highly thermal insulative material surrounding said connector tube means and insulating the connector tube means from premature consumption by the molten bath, said connector tube means including an upper coupler tube portion releasably connectible with the lower part of the tip section and a lower portion defining an oxygen exit tube, said refractory sheath surrounding and being carried by said oxygen exit tube, said oxygen exit tube being provided with fastener means being imbedded in the refractory sheath and said fastener means attaching to said oxygen exit tube, and said fastener means including a vertically extending undulating surface on said oxygen exit tube which is entrained in said sheath surrounding said oxygen exit tube.

Claim 6

A water-cooled oxygen injection submergible lance for injecting oxygen below the surface of a molten steel producing bath from above the molten bath comprising: an upper lance section and a tip section each having a central oxygen gas conduit and coolant conduit means surrounding the oxygen conduit, a replaceable and consumable submersion nozzle being connected with the lower end of the tip section and including a connector tube means being releasably coupled with the lower end of the tip section and having an oxygen gas exit passage and a refractory sheath of highly thermal insulative material surrounding said connector tube means and insulating the connector tube means from premature consumption by the molten bath, said connector tube means including an upper coupler tube portion releasably connectible with the lower part of the tip section and a lower portion defining an oxygen exit tube, said refractory sheath surrounding and being carried by said oxygen exit tube, said oxygen exit tube being provided with fastener means being imbedded in the refractory sheath and said fastener means attaching to said oxygen exit tube, and said fastener means including a vertically extending undulating surface on said oxygen exit tube which is entrained in said sheath surrounding said oxygen exit tube.

Claim 7

A water-cooled oxygen injection submergible lance for injecting oxygen below the surface of a molten steel producing bath from above the molten bath comprising: an upper lance section and a tip section each having a central oxygen gas conduit and coolant conduit means surrounding the oxygen conduit, a replaceable and consumable submersion nozzle being connected with the lower end of the tip section and including a connector tube means being releasably coupled with the lower end of the tip section and having an oxygen gas exit passage and a refractory sheath of highly thermal insulative material surrounding said connector tube means and insulating the connector tube means from premature consumption by the molten bath, said connector tube means including an upper coupler tube portion releasably connectible with the lower part of the tip portion and a lower portion defining an oxygen exit tube, said refractory sheath surrounding and being carried by said oxygen exit tube, said oxygen exit tube being provided with fastener means being imbedded in the refractory sheath and said fastener means attaching to said oxygen exit tube, said fastener means including a metal coil spirally surrounding said oxygen exit tube and having an upper end fixedly attached to the oxygen exit tube with the remainder of the coil having a free end imbedded in the refractory sheath.

Claim 8

A water-cooled oxygen injection submergible lance for injecting oxygen below the surface of a molten steel producing bath from above the molten bath comprising: an upper lance section and a tip section each having a central oxygen gas conduit and coolant conduit means surrounding the oxygen conduit, a replaceable and consumable submersion nozzle being connected with the lower end of the tip section and including a connector tube means being releasably coupled with the lower end of the tip section and having an oxygen gas exit passage and a refractory sheath of highly thermal insulative material surrounding said connector tube means and insulating the connector tube means from premature consumption by the molten bath, said connector tube means including an upper coupler tube portion releasably connectible with the lower part of the tip portion and a lower portion defining an oxygen exit tube, said refractory sheath surrounding and being carried by said oxygen exit tube, said oxygen exit tube being provided with fastener means being imbedded in the refractory sheath and said fastener means attaching to said oxygen exit tube, said fastener means including a metal coil spirally surrounding said oxygen exit tube and having an upper end fixedly attached to the oxygen exit tube with the remainder of the coil having a free end imbedded in the refractory sheath.

Claim 9

A water-cooled oxygen injection submergible lance for injecting oxygen below the surface of a molten steel producing bath from above the Molten bath comprising: an upper lance section and a tip section each having a central oxygen gas conduit and coolant conduit means surrounding the oxygen conduit, a replaceable and consumable submersion nozzle being connected with the lower end of the tip section and including a connector tube means being releasably coupled with the lower end of the tip section and having an oxygen gas exit passage and a refractory sheath of highly thermal insulative material surrounding said connector tube means and insulating the connector tube means from premature consumption by the molten bath, said connector tube means including an upper coupler tube portion releasably connectible with the lower part of the tip section and a lower portion defining an oxygen exit tube, said refractory sheath surrounding and being carried by said oxygen exit tube, said oxygen exit tube being a first cone part with the wide base of the cone part extending in outwardly tapered manner downward and said refractory sheath being a second cone part extending its widened bottom part downward and extending over said oxygen exit tube.

Claim 10

A water-cooled oxygen injection submergible lance for injecting oxygen below the surface of a molten steel producing bath from above the Molten bath comprising: an upper lance section and a tip section each having a central oxygen gas conduit and coolant conduit means surrounding the oxygen conduit, a replaceable and consumable submersion nozzle being connected with the lower end of the tip section and including a connector tube means being releasably coupled with the lower end of the tip section and having an oxygen gas exit passage and a refractory sheath of highly thermal insulative material surrounding said connector tube means and insulating the connector tube means from premature consumption by the molten bath, said connector tube means including an upper coupler tube portion releasably connectible with the lower part of the tip section and a lower portion defining an oxygen exit tube, said refractory sheath surrounding and being carried by said oxygen exit tube, said oxygen exit tube being a first cone part with the wide base of the cone part extending in outwardly tapered manner downward and said refractory sheath being a second cone part extending its widened bottom part downward and extending over said oxygen exit tube.

Claim 11

The invention according to claim 5, and stuffing material of a high resistant-to-heat nature extending between the exit tube and the sheath as packing therebetween.

Claim 12

A water-cooled oxygen injection submergible lance for injecting oxygen below the surface of a molten steel producing bath from above the molten bath comprising: an upper lance section and a tip section each having a central oxygen gas conduit and coolant conduit means surrounding the oxygen conduit, a replaceable and consumable submersion nozzle being connected with the lower end of the tip section and including a connector tube means being releasably coupled with the lower end of the tip section and having an oxygen gas exit passage and a refractory sheath of highly thermal insulative material surrounding said connector tube means and insulating the connector tube means from premature consumption by the molten bath, said connector tube means including an upper coupler tube portion releasably connectible with the lower part of the tip section and a lower portion defining an oxygen exit tube, said refractory sheath surrounding and being carried by said oxygen exit tube, said oxygen exit tube being provided with fastener means being imbedded in the refractory sheath and said fastener means attaching to said oxygen exit tube, said oxygen exit tube including an upper reduced vertically extending portion and a lower enlarged vertically extending portion, said fastener means extending transversely outward of the reduced and enlarged portions and said refractory sheath surrounding the enlarged and reduced portions.

Claim 13

A water-cooled oxygen injection submergible lance for injecting oxygen below the surface of a molten steel producing bath from above the molten bath comprising: an upper lance section and a tip section each having a central oxygen gas conduit and coolant conduit means surrounding the oxygen conduit, a replaceable and consumable submersion nozzle being connected with the lower end of the tip section and including a connector tube means being releasably coupled with the lower end of the tip section and having an oxygen gas exit passage and a refractory sheath of highly thermal insulative material surrounding said connector tube means and insulating the connector tube means from premature consumption by the molten bath, said connector tube means including an upper coupler tube portion releasably connectible with the lower part of the tip section and a lower portion defining an oxygen exit tube, said refractory sheath surrounding and being carried by said oxygen exit tube, said oxygen exit tube being provided with fastener means being imbedded in the refractory sheath and said fastener means attaching to said oxygen exit tube, said oxygen exit tube including an upper reduced vertically extending portion and a lower enlarged vertically extending portion, said fastener means extending transversely outward of the reduced and enlarged portions and said refractory sheath surrounding the enlarged and reduced portions.

Claim 14

The invention according to claim 7, and said enlarged portion having transversely extending and inwardly directed fastener means and refractory sheath enveloping said inwardly directed fastener means with the refractory sheath being on all sides of said enlarged portion.

Claim 15

The invention according to claim 7, and said nozzle having a refractory coating on the inside surface of the enlarged portion of said exit tube.

Claim 16

The invention according to claim 8, and said reduced portion being above said enlarged portion.

Claim 17

A water-cooled oxygen injection submergible lance for injecting oxygen below the surface of a molten steel producing bath from above the molten bath comprising: an upper lance section and a tip section each having a central oxygen gas conduit and coolant conduit means surrounding the oxygen conduit, a replaceable and consumable submersion nozzle being connected with the lower end of the tip section and including a connector tube means being releasably coupled with the lower end of the tip section and having an oxygen gas exit passage and a refractory sheath of highly thermal insulative material surrounding said connector tube means and insulating the connector tube mEans from premature consumption by the molten bath, said upper lance and tip sections each having a concentric shielding gas tube encircling the oxygen conduit and providing an annular shielding gas passage between the coolant conduit means and the oxygen conduit, said connector tube means including an outer shielding gas tube and an inner oxygen exit tube within the outer tube defining the oxygen exit passage, each of the inner and outer tubes being releasably connected with said lance tip section and defining between them an annular shielding gas exit passage surrounding the oxygen exit tube and connecting with the shielding gas tube.

Claim 18

A water-cooled oxygen injection submergible lance for injecting oxygen below the surface of a molten steel producing bath from above the molten bath comprising: an upper lance section and a tip section each having a central oxygen gas conduit and coolant conduit means surrounding the oxygen conduit, a replaceable and consumable submersion nozzle being connected with the lower end of the tip section and including a connector tube means being releasably coupled with the lower end of the tip section and having an oxygen gas exit passage and a refractory sheath of highly thermal insulative material surrounding said connector tube means and insulating the connector tube mEans from premature consumption by the molten bath, said upper lance and tip sections each having a concentric shielding gas tube encircling the oxygen conduit and providing an annular shielding gas passage between the coolant conduit means and the oxygen conduit, said connector tube means including an outer shielding gas tube and an inner oxygen exit tube within the outer tube defining the oxygen exit passage, each of the inner and outer tubes being releasably connected with said lance tip section and defining between them an annular shielding gas exit passage surrounding the oxygen exit tube and connecting with the shielding gas tube.

Claim 19

The invention according to claim 11, and said connector tube means being provided with purge hole means communicating with the concentric shielding gas tube.

Claim 20

A water-cooled oxygen injection submergible lance for injecting oxygen below the surface of a molten steel producing bath from above the molten bath comprising: an upper lance section and a tip section each having a central oxygen gas conduit and coolant conduit means surrounding the oxygen conduit, a replaceable and consumable submersion nozzle being connected with the lower end of the tip section and including a connector tube means being releasably coupled with the lower end of the tip section and having an oxygen gas exit passage and a refractory sheath of highly thermal insulative material surrounding said connector tube means and insulating the connector tube means from premature consumption by the molten bath, said upper lance and tip sections each having a concentric shielding gas tube encircling the oxygen conduit and providing an annular shielding gas passage between the coolant conduit means and the oxygen conduit, said connector tube means including an outer shielding gas tube and an inner oxygen exit tube within the outer tube defining the oxygen exit passage, each of the inner and outer tubes being releasably connected with said lance tip section and defining between them an annular shielding gas exit passage surrounding the oxygen exit tube and connecting with the shielding gas tube, said outer tube being of metal and resistant to high heat and surrounded by said refractory sheath and said inner tube being of metal and resistant to high heat.

Claim 21

A water-cooled oxygen injection submergible lance for injecting oxygen below the surface of a molten steel producing bath from above the molten bath comprising: an upper lance section and a tip section each having a central oxygen gas conduit and coolant conduit means surrounding the oxygen conduit, a replaceable and consumable submersion nozzle being connected with the lower end of the tip section and including a connector tube means being releasably coupled with the lower end of the tip section and having an oxygen gas exit passage and a refractory sheath of highly thermal insulative material surrounding said connector tube means and insulating the connector tube means from premature consumption by the molten bath, said upper lance and tip sections each having a concentric shielding gas tube encircling the oxygen conduit and providing an annular shielding gas passage between the coolant conduit means and the oxygen conduit, said connector tube means including an outer shielding gas tube and an inner oxygen exit tube within the outer tube defining the oxygen exit passage, each of the inner and outer tubes being releasably connected with said lance tip section and defining between them an annular shielding gas exit passage surrounding the oxygen exit tube and connecting with the shielding gas tube, said outer tube being of metal and resistant to high heat and surrounded by said refractory sheath and said inner tube being of metal and resistant to high heat.

Claim 22

The invention according to claim 13, and said inner and outer tubes having spacer means between them.

Claim 23

The invention according to claim 13, and said outer tube having fastener means projecting out transversely therefrom and said refractory sheath imbedding said fastener means and being reinforced thereby.

Claim 24

A water-cooled oxygen injection submergible lance for injecting oxygen below the surface of a molten steel producing bath from above the molten bath comprising: an upper lance section and a tip section each having a central oxygen gas conduit and coolant conduit means surrounding the oxygen conduit, a replaceable and consumable submersion nozzle being connected with the lower end of the tip section and including a connector tube means being releasably coupled with the lower end of the tip section and having an oxygen gas exit passage and a refractory sheath of highly thermal insulative material surrounding said connector tube means and insulating the connector tube means from premature consumption by the molten bath, said upper lance and tip sections each having a concentric shielding gas tube encircling the conduit tube and providing an annular shielding gas passage between the coolant conduit means and the oxygen conduit, said connector tube means including an outer shielding gas tube and an inner oxygen exit tube within the outer tube defining the oxygen exit passage, each of the inner and outer tubes being releasably connected with said lance tip section and defining between them an annular shielding gas exit passage surrounding the oxygen exit tube and connecting with the shielding gas tube, said outer tube includiNg a releasable coupler releasably connecting with said lance tip section and including a lower outer tube defining said refractory sheath being releasably connected to said coupler and said inner tube being of high heat resistant metal.

Claim 25

A water-cooled oxygen injection submergible lance for injecting oxygen below the surface of a molten steel producing bath from above the molten bath comprising: an upper lance section and a tip section each having a central oxygen gas conduit and coolant conduit means surrounding the oxygen conduit, a replaceable and consumable submersion nozzle being connected with the lower end of the tip section and including a connector tube means being releasably coupled with the lower end of the tip section and having an oxygen gas exit passage and a refractory sheath of highly thermal insulative material surrounding said connector tube means and insulating the connector tube means from premature consumption by the molten bath, said upper lance and tip sections each having a concentric shielding gas tube encircling the conduit tube and providing an annular shielding gas passage between the coolant conduit means and the oxygen conduit, said connector tube means including an outer shielding gas tube and an inner oxygen exit tube within the outer tube defining the oxygen exit passage, each of the inner and outer tubes being releasably connected with said lance tip section and defining between them an annular shielding gas exit passage surrounding the oxygen exit tube and connecting with the shielding gas tube, said outer tube includiNg a releasable coupler releasably connecting with said lance tip section and including a lower outer tube defining said refractory sheath being releasably connected to said coupler and said inner tube being of high heat resistant metal.

Claim 26

A water-cooled oxygen injection submergible lance for injecting oxygen below the surface of a molten steel producing bath from above the molten bath comprising: an upper lance section and a lower lance tip section each having a central oxygen conduit and coolant conduit means surrounding the oxygen conduit, said upper and lower lance sections having a shielding gas conduit surrounding said oxygen conduit and being surrounded by said coolant conduit means, a replaceable and consumable submersion nozzle being releasably connected with the lower end of said tip section and having a central oxygen tube communicating with the oxygen conduits in the upper and tip sections and having an outer concentric shielding gas tube surrounding the oxygen tube and communicating with said shielding gas conduits of the upper and lower lance sections.

Claim 27

A water-cooled oxygen injection submergible lance for injecting oxygen below the surface of a molten steel producing bath from above the molten bath comprising: an upper lance section and a lower lance tip section each having a central oxygen conduit and coolant conduit means surrounding the oxygen conduit, said upper and lower lance sections having a shielding gas conduit surrounding said oxygen conduit and being surrounded by said coolant conduit means, a replaceable and consumable submersion nozzle being releasably connected with the lower end of said tip section and having a central oxygen tube communicating with the oxygen conduits in the upper and tip sections and having an outer concentric shielding gas tube surrounding the oxygen tube and communicating with said shielding gas conduits of the upper and lower lance sections.

Claim 28

A water-cooled oxygen injection submergible lance for injecting oxygen below the surface of a molten steel producing bath from above the molten bath comprising: an upper lance section and a lower lance tip section each having a central oxygen conduit and coolant conduit means surrounding the oxygen conduit, said upper and lower lance sections having a shielding gas conduit surrounding said oxygen conduit and being surrounded by said coolant conduit means, a replaceable and consumable submersion nozzle being releasably connected with the lower end of said tip section and having a central oxygen tube communicating with the oxygen conduits in the upper and tip sections and having an outer concentric shielding gas tube surrounding the oxygen tube and communicating with said shielding gas conduits of the upper and lower lance sections, said shielding gas tube being a refractory sheath of high resistance to heat and means releasably coupling said sheath to said shielding gas conduit and said oxygen tube being of high heat resistant metal and being releasably coupled to said oxygen conduit.

Claim 29

A water-cooled oxygen injection submergible lance for injecting oxygen below the surface of a molten steel producing bath from above the molten bath comprising: an upper lance section and a lower lance tip section each having a central oxygen conduit and coolant conduit means surrounding the oxygen conduit, said upper and lower lance sections having a shielding gas conduit surrounding said oxygen conduit and being surrounded by said coolant conduit means, a replaceable and consumable submersion nozzle being releasably connected with the lower end of said tip section and having a central oxygen tube communicating with the oxygen conduits in the upper and tip sections and having an outer concentric shielding gas tube surrounding the oxygen tube and communicating with said shielding gas conduits of the upper and lower lance sections, said shielding gas tube being a refractory sheath of high resistance to heat and means releasably coupling said sheath to said shielding gas conduit and said oxygen tube being of high heat resistant metal and being releasably coupled to said oxygen conduit.

Claim 30

The invention according to claim 18, and said means releasably coupling the shielding gas conduit to the shielding gas tube including a coupler threaded to the shielding gas conduit and to the shielding gas tube.

Claim 31

A water-cooled oxygen injection submergible lance for injecting oxygen below the surface of a molten steel producing bath from above the molten bath comprising: an upper lance section and a lower lance tip section each having a central oxygen conduit and coolant conduit means surrounding the oxygen conduit, said upper and lower lance sections having a shielding gas conduit surrounding said oxygen conduit and being surrounded by said coolant conduit means, a replaceable and consumable submersion nozzle being releasably connected with the lower end of said tip section and having a central oxygen tube communicating with the oxygen conduits in the upper and tip sections and having an outer concentric shielding gas tube surrounding the oxygen tube and communicating with said shielding gas conduits of the upper and lower lance sections, said shielding gas tube including a metal tube releasably connected to said shielding gas conduit, said oxygen tube being a metal tube releasably connected to said oxygen conduit, a refractory sheath surrounding said shielding gas tube.

Claim 32

A water-cooled oxygen injection submergible lance for injecting oxygen below the surface of a molten steel producing bath from above the molten bath comprising: an upper lance section and a lower lance tip section each having a central oxygen conduit and coolant conduit means surrounding the oxygen conduit, said upper and lower lance sections having a shielding gas conduit surrounding said oxygen conduit and being surrounded by said coolant conduit means, a replaceable and consumable submersion nozzle being releasably connected with the lower end of said tip section and having a central oxygen tube communicating with the oxygen conduits in the upper and tip sections and having an outer concentric shielding gas tube surrounding the oxygen tube and communicating with said shielding gas conduits of the upper and lower lance sections, said shielding gas tube including a metal tube releasably connected to said shielding gas conduit, said oxygen tube being a metal tube releasably connected to said oxygen conduit, a refractory sheath surrounding said shielding gas tube.

Claim 33

The invention according to claim 20, and fastener means imbedded therein being attached on said shielding gas tube for connecting of the refractory sheath to the shielding gas tube.

Claim 34

The invention according to claim 20, and spacer means being the shielding gas tube and the oxygen tube for keeping the shielding gas tube concentric with respect to said oxygen tube.