Abstract:
An apparatus for actively transferring a coil of hot metal within a coilbox in hot strip mill. The apparatus is located downstream of the initial coilbox uncoiling station and includes at least one singly pivoting coil cradle. Such a coil cradle has a first support roller with a fixed rotational axis, a swing-frame mounted to pivot about that axis, and a second support roller mounted to the swing-frame, able to pivot about the fixed rotational axis of the first support roller to permit the coil of hot metal to be passed from the coil cradle. In certain embodiments, the apparatus includes a plurality of such singly pivoting coil cradles. The apparatus may also include at least one dually pivoting coil cradle.
Abstract:
A method for removing elemental sulfur from a hot gas stream, such as an autoclave vent gas, while simultaneously cooling the gas stream. The method results in conversion of sulfur in the hot gas stream to the form of solid, non-sticky sulfur allotropes such as rhombic sulfur while avoiding formation of sticky sulfur allotropes such as monoclinic sulfur, thereby avoiding scaling and fouling of plant equipment. According the method, the hot gas stream is contacted with an aqueous medium containing a particulate material inside a quench vessel having a first inlet for the hot gas stream, a second inlet for the aqueous medium, and an outlet for removing a sulfur-containing liquid fraction from the vessel. At least a portion of the sulfur contained in the hot gas stream, along with other condensable materials, becomes incorporated into the aqueous medium and is subsequently drained from the vessel. The aqueous medium may comprise a slurry of tailings or other waste material, and the particulate matter contained in the aqueous medium may provide nucleation sites for the preferential formation of non-sticky solid forms of sulfur.
Abstract:
Diagnostic methods and systems are used to determine operating condition and performance of a cooling element in a metallurgical reactor during operation of the reactor. A system can include sensing means, processing means and display means. The sensing means is located in or approximate the cooling element for sensing operating conditions of the cooling element. The processing means is in communication with the sensing means for receiving data corresponding to the sensed operating conditions and for processing the data to determine a relative condition indicator of the cooling element. The display means is in communication with the processing means and displays the relative condition indicator to a user of the diagnostic system. The display means can display a first, second or third state representative of the relative health indicator.
Abstract:
A power generation plant and a method of generating electric energy from recovered heat during an industrial process that uses steam as a means of transferring energy. The method comprises: a) generating a first saturated steam in a first heat exchanger heated by a first source of recovered heat; b) feeding the first saturated steam into a first steam turbine generator, where the first steam turbine generator outputs exhaust steam; c) removing moisture from the exhaust steam with a moisture separator; d) superheating the moisture reduced exhaust steam from step c) in a main heat exchanger with a heat source; and e) feeding the superheated exhaust steam into a second steam turbine generator. The power generation plant comprises a first source of saturated steam, a first steam turbine generator, a moisture separator, a second source of saturated steam, a heat exchanger and a second steam turbine generator.
Abstract:
A system is disclosed for lowering (“slipping”) and/or raising (“back slipping”) electrodes relative to an electrode column. The system includes an electrode column having at least one slipping sleeve and a power clamp, each of which apply a radial clamping force to the electrode. The magnitudes of the clamping forces are selected such that application of a downwardly directed axial force on the one or more slipping sleeves, in combination with the weight of the electrode, are sufficient to overcome the resistive force of the power clamp, resulting in downward movement of the electrode without release of the clamping forces. Electrode columns having two movable slipping sleeves are also capable of raising the electrode relative to the furnace without release of the clamping forces.
Abstract:
A process for generating a metal sulfate that involves crystallizing a metal sulfate from an aqueous solution to form a crystallized metal sulfate in a mother liquor with uncrystallized metal sulfate remaining in the mother liquor; separating the crystallized metal sulfate from the mother liquor; basifying a portion of the mother liquor to convert the uncrystallized metal sulfate to a basic metal salt; and using the basic metal salt upstream of crystallizing the metal sulfate. So crystallized, the generated metal sulfate may be battery-grade or electroplating-grade.
Abstract:
Processes and methods for refining ferronickel alloy, and producing nickel sulfate or other nickel product, are provided, where the ferronickel alloy is treated with an oxidizing leach. The oxidizing leach may be, for example, a pressure oxidation (POX) leach or a leach with peroxide or copper (II) ions. The treatment may be in the presence of added copper, such as by providing a copper sulfate solution. Producing nickel sulfate may comprise removing copper and iron after the leach, removing impurities, and either crystallizing the nickel sulfate or precipitating/winning another nickel product.
Abstract:
A process and method for producing a crystallized metal sulfate. The crystallized metal sulfate may be battery-grade. The method may comprise receiving a metal ion-containing stream and crystalizing a metal sulfate from the stream. The process may comprise receiving a stream from a metal processing plant, and crystalizing a metal sulfate from the stream. The process may be a metal electrowinning process comprising crystalizing a metal ion-containing stream to form a crystallized metal sulfate in a mother liquor. The process or method may comprise returning the mother liquor upstream or to the metal electrowinning process.
Abstract:
A system and method for affecting the crossbow in a metal sheet in continuous coating process. The system comprises strip distance sensors for determining distances to the metal sheet. A controller is configured to adjust the position of the correcting roll, based on the strip distances, to affect the crossbow in the sheet to help control the thickness of the coating on the sheet. The system may comprise a crossbow model to help determine the new correcting roll position. The distances determined by the strip distance sensors may be also be used to adjust the position of the air knives.
Abstract:
A flexible electrical connector assembly is adapted to connect a bus bar of an electrolytic cell to a collector bar of the electrolytic cell. The assembly includes an electrical connector including a plurality of conductive metal sheets, the electrical connector having a collector bar end and a bus bar end. The electrical connector may be adapted for being joined, at the collector bar end, to the collector bar and, at the bus bar end, to the bus bar. The electrical connector may be adapted to implement a change in direction, at a bend along a current-carrying path between the bus bar end and the collector bar end, the bend assisting to define the change in direction as greater than 90 degrees.