Abstract: A water-cooled lance is supported above the mouth of a steel-making vessel for vertical reciprocating movement and includes a slurry pipe which is rotatably positioned to spray repair material against the inner lining of the vessel, or to place a new lining on the interior of the vessel.

Abstract: A lance for use in a basic oxygen vessel is provided with a fluid cooling arrangement which is mounted directly on the lance structure and which is vertically adjustable therewith to provide a fluid spray which effectively enables and ensures cooling and suppression of the exiting gas before it contacts the hood and moves into the ducts of the hood structure.

Abstract: Skulls which form within the upper nose section of steelmaking vessels are removed by means of a centrally located top blowing lance designed to blow at high velocity oxygen or other gases. The lance includes laterally extending ports communicating with a central relatively wide gas chamber and the gas is directed generally laterally outwardly against the inner wall of the nose section to retard or remove the skulls.

Abstract: A lance assembly for insertion into a steelmaking vessel includes a sensor instrument supporting nozzle assembly which projects outwardly from the lance and which is cooled by water circulation. The lance has provisions for the inclusion of an inert gas which is directed into a reduced diameter cable enclosing pipe connected to the nozzle supporting the sensor instrument.

Abstract: Skulls which form within the upper nose section of steelmaking vessels are removed by means of a centrally located top blowing lance designed to blow at high velocity oxygen or other gases. The lance includes laterally extending ports communicating with a central relatively wide gas chamber and the gas is directed generally laterally outwardly against the inner wall of the nose section to retard or remove the skulls.

Abstract: 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 transmit signals providing information in connection with the refractory or contents of the bath contained within the vessel. The arrangement is such that it accommodates the normal expansion and contraction of the lance resulting from the atmosphere within which the lance is utilized.

Abstract: A steel making oxygen lance assembly includes a top support member having oxygen, water inlet and outlet pipes connected to a supply source and discharge source. A connecter assembly includes first upper and second lower annular members with aligned slots which are secured together by a quick disconnect arrangement. The lower connecter includes a ring which has pipes connected thereto providing communication with the pipes on the top support member. One of the connecter members also has a replaceable sleeve connected thereto which also includes openings in registry with the slots. A vent arrangement provides for positive venting of any leakage. O-rings are provided to prevent leakage between the pipes and contacting surfaces.

Abstract: A gas and oxygen lance includes a top support member with first and second connector assemblies connected together with a quick release arrangement. The connector assemblies both include plates with aligned openings which transmit oxygen, gas, and water from the top support to the nozzle by means of oxygen, gas, and water pipes. The lance includes a sleeve assembly connected to one of the connector assemblies which is readily replaceable and which are connected in relative sealing and sliding relation to the oxygen and gas pipes. O-ring seals are provided to prevent leakage and a venting system safeguards the assembly in the event of leakage.

Abstract: A steelmaking oxygen lance assembly includes a top support member having oxygen and water inlet and outlet pipes. The support member includes a connector plate assembly provided with slots communicating with the pipes. A second connector plate assembly with similar slots is clamped to the first connector plate by quick releasable securing members with the slots in registry. The support head includes an upper oxygen pipe that projects downwardly into a sleeve supported on the second connector plate assembly to provide a slip joint.A lower oxygen pipe on the second connector plate assembly includes an upper enlarged tubular portion in sliding engagement with the sleeve with a lower enlarged portion of the upper oxygen pipe. The arrangement includes a vent chamber in the slip joint and positive venting through the second connector plate assembly.

Abstract: A steelmaking oxygen lance assembly includes a top support member having oxygen and water inlet and outlet pipes. The support member includes a connector plate assembly provided with slots communicating with the pipes. A second connector plate assembly with similar slots is clamped to the first connector plate by quick releasable securing members with the slots in registry. The support head includes an upper oxygen pipe that projects downwardly into a sleeve supported on the second connector plate assembly to provide a slip joint.A lower oxygen pipe on the second connector plate assembly includes an upper enlarged tubular portion in sliding engagement with the sleeve with a lower enlarged portion of the upper oxygen pipe. The arrangement includes a vent chamber in the slip joint and positive venting through the second connector plate assembly.

Abstract: An oxygen lance includes a top connector and support member which is provided with oxygen and water inlet and outlet pipes connected to an upper connector plate assembly having a flat plate surface with a plurality of openings. A lower connector assembly is connected to the upper connector assembly by quick disconnect clamping means. The lower connector assembly includes openings registering with the upper openings and communicating oxygen and water inlet and outlet pipes. The lower connector assembly is provided to communicate with a vent passage provided at the lower end of the lance by means of a vent pipe which envelop the lower oxygen pipe and communicates with the atmosphere.

Abstract: An oxygen lance assembly includes a top connector member having oxygen and water inlet and outlet pipes communicating with the slotted openings of a first connector plate assembly. A second connector plate assembly includes complementary slots in a flat plate which is quickly connected and released by means of a quick disconnect arrangement. The second connector assembly includes oxygen, water inlet and outlet pipes communicating with the slots. O-ring seals are positioned to prevent leakage of oxygen into the water pipes, or the leakage of water into the oxygen pipe. Any leakage which might occur is efficiently vented to the atmosphere.

Abstract: A lance for directing oxygen and fuel oil to a basic oxygen furnace includes a central fuel pipe, an insulating pipe around said fuel pipe, an oxygen pipe and water coolant pipes, all concentrically disposed. The central fuel pipe and insulating pipe have closed bottom walls and a plurality of relatively narrow fuel tubes are connected to bores in the bottom wall of the fuel tube, extend through the bottom wall of the insulating pipe and extend into three converging-diverging orifices. The narrow fuel tubes are supported in cantilever fashion and are concentric with each orifice.

Abstract: A lance for use in a basic oxygen vessel is provided with a fluid cooling arrangement which is mounted directly on the lance structure and which is vertically adjustable therewith to provide a fluid spray which effectively enables and ensures cooling and suppression of the exiting gas before it contacts the hood and moves into the ducts of the hood structure.