52results about "Metallurgical apparatus" patented technology

Embodiments of the invention are directed to a rotor for a molten metal pump and a molten metal pump including the rotor. The rotor has a main body and a top comprised of a material that is at least twice as hard as the main body. The top, among other things, may form a first portion of each rotor blade wherein the first portion directs molten metal into a pump chamber or other structure in which the rotor is mounted.

A Preheater-Steelmaking Furnace and closed loop Process System for semi-continuous melting of integrally preheated recycled or virgin ferrous charge, by using highly energy efficient combustion process of natural gas combusted by oxygen as the main heat source, after preheating of the cold charge, by fully exploiting thermal energies of the melting process off-gases, in a gas tight, low noise, ecologically friendly PSF with scant CO and drastically reduced CO2 in exhaust gases for semi-continuous, batch self-charging, sealed pairs of eccentrically rotating quasi cylindrical, permeable half drums hoppers creating separate preheating chambers.

Method of building a direct smelting plant comprising a metal smelting vessel (11) and ancillary plant components such as the components of a hot air supply station (24), an offgas treatment station (32), a solids feed station (41), a hot metal desulphurization station (47) and hot metal and slag launders extending from the smelting vessel (11). The ring track (53) of a ringer crane (51) is installed in front of location at which vessel (11) is to be installed. Crane boom (54) is laid out along elongate stretch of the building site which becomes a corridor (60) between major ancillary components when plant is fully erected. Boom (54) is connected to crane carriage (52) and hoisted to provide high lift capacity over a ground area embracing proposed site of vessel (11) and ancillary components. Prefabricated components are then lifted by crane (51) into appropriate position for final installation. After installation is completed boom (54) is laid down along corridor (60) and crane (51) is dismantled and removed, leaving corridor (60) as an access laneway.

An apparatus for the combustion of gas exiting from an electric arc furnace for the preheating of scraps entering the furnace itself foresees an insertion device of comburent substance into a preheating chamber or loading tunnel of the scrap metal having an inlet section of the scrap metal, a seal section to prevent an uncontrolled entrance of air in the tunnel, a heating section and an unloadingsection of the scrap metal in the furnace. Said insertion device of the comburent substance comprises one or more adjustable openings placed in the loading tunnel, and said apparatus comprises a device or a series of devices, also not equipped with autonomous movement, of mechanical seal nature placed in the insertion or inlet section of the scrap metal in the loading tunnel or preheating chamber.

A material scrap submergence device comprises a body (10) of heat resistant and / or a refractory material that includes a side wall (12) and a base (14) that define a submergence chamber (10). The refractory body (10) can include passages (24) that receive rods (22). The rods (22) can place the refractory body (10) under compression. In another embodiment, the body is confined by a frame (72) attached to the body. The submergence chamber (10) can also be used as a gas injection chamber.

A metallurgical furnace has a cover (20) for a vessel (10) and a charging device (30) for charging material that will be melted in the vessel. The charging device has a rotatable retaining means (31) and a projection (40) is provided at a charging opening (42). The furnace has a maximum filling level (H2) and the rotatable retaining means is pivoted into the projection for the charging operation. The pivotable range of the retaining means does not extend below the maximum filling level (H2). At least two self-supporting material baskets (32) can be positioned in a removable manner above the projection (40), and each comprises an inner chamber that can be closed on the lower side thereof by the retaining means (31) and a volume (C) for receiving the charging materials. A change device (33) interchanges and positions the material baskets (32).

In a metal melting furnace, a separation wall 60 is provided between an inclined hearth 30 and a molten metal reservoir 35 to define a molten metal processing portion 65 . The separation wall is provided with a connecting passage 61 for the molten metal, between the molten metal reservoir and the molten metal processing portion, at a height level higher than a bottom surface 67 of the molten metal processing portion. The separation wall is also provided on its upper portion with an exhaust gas passage which permits exhaust gas discharged from the molten metal reservoir to pass therethrough. An inspection opening 31 with a door 32 is provided in a furnace wall surface 37 W to open into the molten metal processing portion.

Disclosed is a device for metallizing uranium oxide and recovering uranium, which reacts uranium oxide with a lithium metal to product uranium metal powder, and filters the resulting product using a porous filter to separate the uranium metal powder from lithium chloride molten liquid to recover the uranium metal powder. The device includes a heating furnace including at least one first heating unit, and a reactor includes a reaction vessel having a discharging valve hole located at the center of a bottom thereof and a conical bottom tapered to the discharging valve hole, a sealing lid for sealing the reaction vessel airtight, an argon gas inlet port for feeding argon gas into the reactor therethrough, and an argon gas outlet port for venting argon gas from the reactor therethrough. A valve assembly controls the discharging valve hole of the reaction vessel, and a plurality of agitators mix a mixture in the reactor. A lithium metal feeder includes a second heating unit and is removably installed through the sealing lid. A cooling jacket is set in the sealing lid, and a porous filter is located under the reactor in the heating furnace. Further, a molten salt recovery tank is positioned under the porous filter in the heating furnace.

A thermal system for separating out co-mingled metals in almost pure form, the system including a tunnel kiln having temperature zones through which the co-mingled metals are conveyed and progressively heated until at least one metal of the co-mingled metals melts thereby separating the melted metal from the other metal or metals of the co-mingled metals. The system includes molten metal catch basins for collecting the melted metal which are arranged beneath a conveyor on which the co-mingled metals are transported within the kiln. The catch basins are tapped to the outside of the kiln so that as the various metals melt out at progressively higher temperatures, they can be collected into cast iron chills or other collection devices to form pure ingots.

The invention pertains to the art of ferrous metallurgy, and more particularly, to a multichambered steelmaking apparatus and to a method of steelmaking. A multichambered steelmaking apparatus contains smelting chambers communicating with each other through their upper portions. Process input ports are provided in the chamber side wall, and the smelting chambers are provided with gas-oxygen burners installed on the walls of the smelting chambers facing each other. A method of steel making employs the apparatus in a unique manner. During operation, the smelting chambers are tilted in the direction of the input port and during the discharge of steel they are tilted in the direction of the outlet. During the melting stage carbon monoxide (CO) is afterburned by gas-oxygen burners forming carbon dioxide (CO) in the exit gasses supplied to the gas exhaust system through the coaxial chamber. A portion of a slag from the previous heat is retained.