Sealing injection apparatus for injecting substances into molten metals

Injection apparatus for use in injecting substances into molten metal contained in a vessel, the apparatus including a nozzle block having at least one initially-closed injection passage therein, a lance pipe movable in the passage and advanceable to open the passage for injection to commence, and sealing means which establish a seal in a space between the lance pipe and the passage when the pipe is advanced to its injection position, the sealing means including an array of compressible seal rings made of a compliant graphitic material mounted on the pipe adjacent an inlet end thereof.

Injection apparatus for use in injecting substances into molten metal contained in a vessel, the apparatus including a nozzle block having at least one initially-closed injection passage therein, a lance pipe movable in the passage and advanceable to open the passage for injection to commence, and sealing means to establish a seal in a space between the lance pipe and the passage when the pipe is advanced to its injection position, the sealing means including a compressible fibrous refractory sleeve fastened to the pipe adjacent an inlet end thereof.

An expandable lance pipe for use in injecting substances into molten metal, the pipe having a fibrous refractory sealing sleeve clamped thereto adjacent one end thereof by a resilient metal clamping element, and the sleeve being compressible in its lengthwise dimension.

An expandable lance pipe for used in injecting substances into molten metal, the pipe having array of compressible seal rings fitted thereto in use when compressed to establish a seal adjacent one end of the pipe, each of said seal rings being made of a compliant graphitic material.

Injection apparatus for use in injecting substances into molten metal contained in a vessel, the apparatus including a nozzle block having at least one initially-closed injection passage therein, a lance pipe movable in the passage and advanceable to open the passage for injection to commence, and sealing means to establish a seal in a space between the lance pipe and the passage when the pipe is advanced to its injection positon, the sealing means including a compressible fibrous refractory sleeve fastened to the pipe adajcent an inlet end thereof, said fibrous sleeve being located between confronting abutments respectively associated with the passage and the lance pipe, said fibrous sleeve being compressed longitudinally betwen these abutments when the lance pipe is advanced.

Injection apparatus for use in injecting substances into molten metal contained in a vessel, the apparatus including a nozzle block having at least one initially-closed injection passage therein, a lance pipe movavble in the passage and advanceable to open the passage for injection to commence, and sealing means to establish a seal in a space between the lance pipe and the passage when the pipe is advanced to its injection positon, the sealing means including a compressible fibrous refractory sleeve fastened to the pipe adjacent an inlet end thereof, said fibrous sleeve being located between confronting abutments respectively associated with the passage and the lance pipe, said fibrous sleeve being compressed longitudinally between these abutments when the lance pipe is advanced, said pipe being movable through an excursion when advanced to open the passage for injection and when advanced its abutment is closer to the other abutment than the initial length of the fibrous sealing sleeve whereby the sleeve is compressed longitudinally and is caused to expand transversely tightly to seal space.

Injection apparatus for use in injecting substances into molten metal contained in a vessel, the apparatus including a nozzle block having at least one initially-closed injection passage therein, a lance pipe movable in the passage and advanceable to open the passage for injection to commence, and sealing means to establish a seal in a space between the lance pipe and the passage when the pipe is advanced to its injection position, the sealing means including a compressible fibrous refractory sleeve fastened to the pipe adajcent an inlet end thereof, said fibrous sealing sleeve being clamped to the lance pipe by a resilient slit metal cylinder.