Abstract: A dross processing assembly includes a stirring station at which dross in a first dross recovery vessel is stirred and a pressing station at which previously stirred dross in a second dross recovery vessel is pressed simultaneously with the stirring of the dross in the first dross recovery vessel. The stirring station and the pressing station may be commonly housed in an enclosure. A conveyor system may advance dross recovery vessels through the dross processing assembly for continuous dross processing.

Abstract: A manufacturing equipment for galvanized steel sheet includes coating tub to coat steel sheet dipped in coating bath wherein the bath including molten zinc and Al is stored at bath temperature T1, separating tub to separate by a flotation top-dross by precipitating the top-dross in the bath wherein the bath transferred from the coating tub is stored at bath temperature T2 lower than T1, adjusting tub to dissolve dross wherein the bath transferred from the separating tub is stored at bath temperature T3 higher than T2 and Fe of the bath is unsaturated, and circulator to circulate the bath in order of the coating tub, the separating tub, and the adjusting tub.

Abstract: Ultrasonic probes containing a plurality of gas delivery channels are disclosed, as well as ultrasonic probes containing recessed areas near the tip of the probe. Ultrasonic devices containing these probes, and methods for molten metal degassing using these ultrasonic devices, also are disclosed.

Abstract: The disclosure provides a method and apparatus for inerting the surface of a metal charge in an induction furnace. The process generally involves use of a porous plug positioned near the surface of the metal charge. Argon (or other blanket gases) is flushed through the porous plug to back fill the volume of the induction furnace above the metal charge with an inert gas.

Abstract: A solder may include zinc, aluminum, magnesium and gallium. The zinc may be present in an amount from about 82% to 96% by weight of the solder. The aluminum may be present in an amount from about 3% to about 15% by weight of the solder. The magnesium may be present in an amount from about 0.5% to about 1.5% by weight of the solder. The gallium may be present in an amount between about 0.5% to about 1.5% by weight of the solder.

Abstract: Methods for degassing and for removing impurities from molten metals are disclosed. These methods can include operating an ultrasonic device in a molten metal bath, and adding a purging gas into the molten metal bath through the tip of the ultrasonic device.

Abstract: The present invention relates to new compositions of matter, particularly metals and alloys, and methods of making such compositions. The new compositions of matter exhibit long-range ordering and unique electronic character.

Abstract: The present invention relates to new compositions of matter, particularly metals and alloys, and methods of making such compositions. The new compositions of matter exhibit long-range ordering and unique electronic character.

Abstract: This invention relates to a single-step pyrometallurgical process for the recovery of non-ferrous metals from zinc bearing residues, in particular from by-products of the zinc and lead industry such as goethite and jarosite. A process for the recovery of metals from industrial Zn residues containing Zn, Fe and S is defined, wherein Zn is fumed, Fe is slagged, and S is oxidized to SO2, characterized in that the Zn fuming, the Fe slagging, and the S oxidation are performed in a single step process, by smelting the residues in a furnace comprising at least one submerged plasma torch generating an oxidizing gas mixture, and by feeding a solid reducing agent to the melt. The process achieves the oxidation of S and the slagging of Fe, while simultaneously achieving the reduction and the fuming of metals such as Zn.

Abstract: A method of operating mechanical separation devices at high temperatures to separate various volatile metals, metal halides and metal oxides to produce high purity materials.

Abstract: The process of the present invention is directed to a method for making zinc or zinc-aluminum alloy additions to galvanizing baths. The process involves addition of a wire of zinc or zinc-aluminum alloy introduced directly into a molten galvanizing bath to more rapidly achieve a desired zinc or zinc-aluminum chemistry thereby reducing the time required to make the bath addition.

Abstract: The process of the present invention is directed to a method for making zinc or zinc-aluminum alloy additions to galvanizing baths. The process involves addition of a wire of zinc or zinc-aluminum alloy introduced directly into a molten galvanizing bath to more rapidly achieve a desired zinc or zinc-aluminum chemistry thereby reducing the time required to make the bath addition.

Abstract: A method and apparatus for substantially smoke free separation and recovery of zinc from galvanizing skimmings and for refining the resulting ash to a by-product form. An essentially closed housing defining a skimmings receiving chamber and a skimmings processing chamber with a bottom opening is placed on or above a galvanizing kettle and extends into the molten zinc of the kettle so that molten zinc is present with a skimmings processing chamber. A motor driven agitator shaft having paddles is rotated within the skimmings processing chamber so that the ends of the paddles enter the molten zinc during each shaft revolution and enhance melting and recovery of the zinc.

Abstract: A process and device are disclosed for precipitating solid compounds from the liquid zinc or liquid zinc-based alloys of a metal bath. According to the disclosed process, partial amounts of the metal phase containing the compound(s) are exposed to an acceleration higher than the acceleration due to gravity and at least partially dissociated thereby into fractions containing heavier and/or lighter components. The molten mass depleted of solid compounds is returned to the metal bath and the part of the molten mass enriched with the desired compounds is discharged. The disclosed device is substantially characterized in that a hollow rotary body (2) is introduced into the molten mass (1). The hollow rotary body (2) can be driven about an axis and is fitted in the submerged or lower area with conveyor means (21) which project into the cavity.

Abstract: The present invention describes the use of zinc treated with metal hydride in organometallic synthesis.

Abstract: A method for cleaning and treating the walls of a kettle containing a molten metal such as zinc comprises injecting nitrogen or other gas into the molten metal through a reaction container. The reaction container may contain a second metal capable of forming an alloy with the molten metal. The reaction container is immersed in the molten metal adjacent the sidewall of the kettle and is moved around the peripheral edge of the kettle to disperse the second metal and the nitrogen into molten metal. The reaction container includes a gas feed pipe having a lower end with a plurality of gas outlets. An enclosure for containing the second metal surrounds the lower end of the feed pipe such that gas exiting the feed pipe bubbles upwardly through the enclosure to contact the second metal. In a preferred embodiment, the gas is nitrogen and the second metal is aluminum which form aluminum nitride in the molten metal.

Abstract: The invention relates to the field of metallurgy and to a method and a device for the extraction of zinc in solution in a liquid iron bath (2) held in a container (3), such as a crucible for the casting of foundry parts. It is characterized in that, before utilizing the bath for the casting of parts, in a first phase, the gas volume (7) situated in the container (3) is sealingly confined in the east iron bath (2) and, in a second phase, a variable partial vacuum is created in the confined atmosphere in a controlled way in order to constantly adjust it to a predetermined value as a function of the time evolution of the pressure of vapor saturating zinc in solution in the melt at the bath temperature; and said zinc is trapped.

Abstract: The present invention relates to a method for cleaning a liquid metal bath, in particular a zinc or zinc-aluminum bath intended for the continuous production of a steel strip coated by immersion in a coating zone (5a), according to which method the metal coating bath (2) is cycled continuously between the coating zone (5a) and a cleaning zone (5b), the rise of solid intermetallic compounds contained in the said bath to the surface is brought about in the cleaning zone (5b), the rise of the said compounds in accelerated and the cleaned bath (2), the iron content of which is close to or below the solubility limit, is led back to the zone (5a).The invention also relates to an apparatus for carrying out the method.