Abstract: The invention relates to apparatus for the introduction of reagents in powder form into a melting pan, in which the lance is arranged eccentrically with respect to the pan axis and the outlet nozzles are directed into the larger region of the pan enclosing the pan axis. Such apparatus is distinguished by optimum mixing in of the added reagents.

Abstract: A method of providing a cantilever spring or a beam which is attached to the frame of a sliding gate valve is disclosed. The apparatus comprises a cantilever spring which is essentially flat and rectangular. A spring mount is provided to anchor the head end of the spring to permit the other end to flex against a load application member or the underneath side of the lower refractory member such as a tube holder and tube. The spring itself has a heel portion and a cantilever portion. At one end of the spring provision is made for a working face which engages the underneath portion of the lower refractory plate.

Abstract: A sliding nozzle device comprises a metallic case having an opening in the center thereof, a refractory plate secured to the metallic case and having a discharge hole formed in the center thereof for discharging molten metal, a metallic hoop located around the refractory plate, an immersion nozzle projected from the opening of the metallic case and attached to the refractory plate, projecting plates located around the refractory plate, and bolts and nuts used for securing the projecting plates to the metallic case.

Abstract: There are provided an apparatus and a method for manufacturing a copper-base alloy. The apparatus includes an alloying spout, at least one feeder and a tundish. The tundish is inclined downwardly from one end toward the other end for flowing a molten copper therethrough. The feeder is connected to the alloying spout for introducing at least one solid solute constituent into the alloying spout. The method includes the steps of providing the above apparatus, continuously introducing the molten copper from the inlet into the passageway of the alloying spout and causing the molten copper to flow downwardly through the passageway to the outlet, and continuously introducing the solid solute constitutent into the passageway of the alloying spout through the feeder to mix the solute constituent with the molten copper to produce the copper-base alloy.

Abstract: The invention concerns a fireproof ceramic terminal brick for a tapping system in particular in steel converters or electric furnaces composed of several fireproof ceramic founder's bricks arranged in a row, together enclosing a passage opening for the steel smelt, thereby characterized in that the terminal brick is formed in two pieces vertical to the direction of flow of the steel smelt and the lower section in the direction of flow of the smelt is formed as a cylindrical body that can be pressed firmly against the upper section of the terminal brick, arranged above it, in such a way as to seal but remaining detachable from it.

Abstract: The invention concerns a material for the covering of casting shrouds.It is comprised of a calcareous composition capable of liberating calcium oxide at a temperature at least equal to 1400.degree. C., its calcium content, expressed in calcium oxide, is between ca. 10% and ca. 60% and preferably between ca. 20% and ca. 50%, the said calcareous composition is bound by a binder chosen in the group comprised of those utilizing carbon/carbon bonds by sintering.Application to the metallurgy of ferro-alloys.

Abstract: A method of manufacturing filters by laser treatment, wherein working is done by a laser beam and a jet of working gas. An absorbing coating is applied to a surface to be worked. The laser beam is focused to form a focal spot within a work piece at a depth h.sub.1 from its surface with0.025.ltoreq.h.sub.1 /h<0.22where h is the thickness of the work piece.Abrasive particles are introduced in a pulsed periodic manner into said jet of working gas at the moment the variation amplitude of the volume of molten metal in a cutting cavity reaches a maximum value. A device for manufacturing filters has a laser, a nozzle with an optical laser focusing system, and a mechanism for controlling the yield of an absorbing coating.

Abstract: A closing and/or regulating apparatus for tapping molten metal from the interior of the metallurgical vessel includes an inner refractory pipe having extending through a wall thereof at least one opening and an outer refractory pipe fitted over the inner pipe and having extending through a wall thereof at least one opening. Outer and inner surfaces of the inner and outer pipes, respectively, define mating sealing surfaces. One of the pipes is fixedly mounted to a metallurgical vessel, and the other pipe is movable axially and/or rotatably relative to the one pipe to thereby selectively bring the openings to the two pipes relatively into and out of alignment. The inner pipe has adjacent an inner end thereof at a position inwardly of the opening therein a closure closing the interior of the inner pipe. The outer pipe defines therein a space forming a gas distribution chamber at a location confronting the closure.

Abstract: A vessel is provided having a first chamber 1 open to atmospheric pressure for receiving liquid metal and a second chamber 2 from which the metal is dispensed interconnected with the first chamber. The second chamber is sealed and coupled to means 4, 6 for reducing the pressure therein to sub-atmospheric whereby to create a higher level of metal in said second than said first chamber.The first and second chambers may be interconnected via a refractory filter.

Abstract: An apparatus for mounting a gas washing sink in a centered manner within an opening through a perforated brick in a wall of a metallurgical vessel and for removing the sink from the perforated brick includes a support assembly to be fixedly mounted on the exterior of the wall of the metallurgical vessel adjacent the opening in the perforated brick. A fastening assembly supports the sink and is mounted with respect to the support assembly for movement relative thereto between an operating position, whereat the sink is pressed into the opening throgh the perforated brick in a centered manner, and a maintenance position, whereat the sink is withdrawn from the opening through the perforated brick. Structure moves the fastening assembly relative to the support assembly to the operating position. A withdrawal apparatus moves the fastening assembly relative to the support assembly from the operating position to the maintenance position.

Abstract: A method and apparatus for introducing an additive material into a metallurgical sample. In a preferred embodiment, the method and apparatus of the present invention comprises introducing a stabilizer, for example, tellurium and/or bismuth, into a metallurgical sample of cast iron or blast furnace hot metal to induce white solidification comprising a probe having a generally enclosed sample cavity and a conduit extending from the cavity for receiving a flow of molten metal for collection in the cavity. A distribution member proximate the conduit is employed for inserting a predetermined quantity of the additive material at a predetermined rate into the molten metal flowing through the conduit so that the additive material is homogeneously distributed throughout the molten metal within the sample cavity.

Abstract: Dispensing apparatus (1) for molten metal or the like comprising a vessel (2) receiving in use a main body (3) of liquid and having dispensing valve means (6, 7) operable to dispense a flow of liquid therefrom, a container (9) defining a chamber (15), means (24) for supporting the container such that an open mouth (16) thereof is immersed in the main body of liquid to define a head space (19) above the liquid in the chamber, suction means (13) connected to the container and operable to reduce pressure in the head space so as to draw liquid from the vessel into the chamber and an induction heating coil (21) operable to heat liquid in the chamber above the level (17) of the main body of liquid, including sensing means (20) sensing the level (17) of the main body of liquid, the sensing means being connected to regulating means (43, 14, 28) operable to regulate the pressure in the head space to thereby regulate the volume of liquid in the chamber such that the level of the main body of liquid is maintained substa

Abstract: An elongated nozzle assembly for closing and/or regulating the discharge from a metallurgical vessel of molten metal in the form of a wide strip includes refractory tubular stator and rotor members each having extending through a tubular wall thereof a discharge opening in the form of a slot elongated in the direction of coincident longitudinal axes thereof. The stator and rotor members are assembled with one member fitting in a sealing manner within the other member, thus forming inner and outer members. The inner member has therein a cavity elongated in the direction of the axes of the members and into which opens the discharge opening of the inner member. A first longitudinal end of the cavity is closed by an end wall of the inner member. A second longitudinal end of the cavity is opened axially through an inlet opening in the respective longitudinal end of the inner member. The inlet opening communicates via the cavity with the discharge opening of the inner member.

Abstract: Apparatus for sorting and recovery of scrap material, particularly aluminum beverage can scrap, includes a rotary kiln (10) in which the raw scrap is heat processed to leave a furnace chamber (12) of the kiln as a mix of large particles of a first composition (e.g. larger pieces of soft aluminium alloy can body) and substantially smaller particles of a second and different composition (e.g. aluminium/manganese alloy can top fines). The output end of the kiln is provided with an axially extending screen section (30) to separate the larger particles from the small immediately adjacent to the chamber so that they cn be passed immediately without substantial loss of heat to a melting furnace (38).

Abstract: A method and apparatus are provided for monitoring in situ the transformation of some fraction of a starting material to another material during the course of a thermal treatment. The starting material is heated to a preselected temperature and its resistivity is measured. A signal is transmitted to an actuator, which indicates cooling of the material when a preselected resistivity or change therein is detected.

Abstract: Tundish for continous casting of steel, of the type comprising a permanent refractory, cast on a frame of sheet metal defining the outer wall of the tundish and on which a refractory wear has been laid. In the body of the permanent refractory, there is provided a gas duct which penetrates into the permanent refractory at the level of the upper edge of the tundish and extends to the bottom of the tundish into a gas distribution chamber, which is covered with a surface distributed gas permeable plate. Application to the continuous casting of steels for tundish between casting ladle and ingot molds.

Abstract: A refractory member has therethrough a flow channel for the passage of molten metal. At least an inner wall portion of the refractory member defining the flow channel is at least partially formed of a material that at least partially includes a ceramic material having the properties of being capable of being heated inductively and to being electrically conductive at a temperature at least equal to the liquidus temperature of the molten metal. A primary induction coil, preferably formed of an electrically conductive ceramic material, surrounds the flow channel and inductively heats the material of the inner wall portion to prevent freezing of molten metal within the flow channel and the formation of deposits therein.

Abstract: An apparatus for meter-feeding and heating of molten metal comprises a centrifugal conduction MHD-pump (1) installed in a metal body whereof coaxially therein this a cylindrical working chamber (4) communicating with a reservoir (2) with molten metal acted upon by a magnetic field induced by a magnetic system.

Abstract: In order to melt and discharge solid and highly viscous products from barrels, the barrels are opened and placed upside down on a foraminous frame. The frame with the barrels placed thereon is then inserted through the open top of a heated vessel defining a heating chamber therein. After covering the top of the vessel, the heating chamber is heated so that the product melts and flows out of the barrels, through the frame and is discharged from the vessel. The discharged product may be stored in a heated storage container.

Abstract: A method and apparatus for determining the correct temperature of a heated coil of sheet material and for using said measurement to control a heat treating furnace. The method includes providing a spot of heat resistant material having a known and constant emissivity that is substantially unity on an uneven edge of the coil, the material of the spot remaining on peaks of the uneven edge. The constant emissivity of the spot is independent of that of the edge, the emissivity of which changes and indicates a temperature is substantially different from the true temperature of the edge. The coil is heated and the spot emits infrared energy in an amount that is substantially representative of the correct temperature of the coil and edge. This infrared energy is sensed by an infrared detector aimed at the spot, the output of the energy being indicative of the true temperature of the edge and of the coil mass after it attains the temperature of the edge.