Abstract: A method is provided for extracting scandium values from a scandium bearing laterite ore. The method includes providing a portion of a scandium bearing laterite ore having an average particle size of no more than 200 mesh, leaching the ore to produce a leachate, and recovering scandium values from the leachate.

Abstract: A method for recovering gold from an ore or a refining intermediate containing gold, comprising a step of contacting a gold-containing raw material obtained from the ore or the refining intermediate with an acidic solution containing a copper ion, an iron ion and a halide ion while supplying an oxidizing agent to leach the gold component in the raw material. The halide ion in the acidic solution is only a bromide ion, wherein the concentration of the bromide ion in the acidic solution is 100 g/L or more or the concentration of the bromide ion in the acidic solution is less than 100 g/L. When the concentration of the bromide ion is less than 100 g/L, a concentration ratio of the halide ion in the acidic solution is such that a ratio of the concentration of the chloride ion to the concentration of the bromide ion is ? or less.

Abstract: Apparatus and method for filtering molten metal, in particular aluminium, including a container (1) with an outer shell or casing of metal and an inner thermally insulated interior cladding or wall construction made of heat resistant insulation and refractory material. A removable lid (2) provided on top of the container to keep the container sealed (air tight) during operation, the container (1) being provided with an inlet chamber (3) having an inlet opening (4) receiving metal from a metal supply launder (10) and an outlet chamber (5) with an outlet opening (6) in which a ceramic or refractory filter (7) is mounted.

Abstract: A method of manufacturing an aluminum alloy ingot using scrap aluminum alloy in the 2xxx or 7xxx series, and a fabrication method after rolling, extrusion and/or forging of an aeronautical structure comprising the steps in the above method, and then at least one rolling, extrusion and/or forging step of the aluminum alloy ingot in the series of scrap used.

Abstract: A Ti-6A1-4V titanium powder alloy composition having enhanced strength resulting from the addition of one or more of the following elements without requiring an increase in oxygen content: Aluminum Iron Nitrogen Carbon The composition may also be used for Ti-6A1-4V titanium alloy starting bar stock.

Abstract: Process for dephosphorization of molten metal during a refining process using a lime composition in the form of compacted particles having a Shatter Test Index of less than 20%, leading to a refined metal reduced in phosphorus components to the extent that the refined metal reduced in phosphorus is showing a phosphorus content lower than 0.02 w % based on the total weight of the refined metal reduced in phosphorus.

Abstract: Digestion of impure alumina with sulfuric acid dissolves all constituents except silica. Resulting sulfates, produced from contaminants in the impure alumina, remain in solution at approximately 90° C. Hot filtration separates silica. Solution flow over metallic iron reduces ferric sulfate to ferrous sulfate. Controlled ammonia addition promotes hydrolysis and precipitation of hydrated titania from titanyl sulfate that is removed by filtration. Addition of ammonium sulfate forms ferrous ammonium sulfate and ammonium aluminum sulfate solutions. Alum is preferentially separated by crystallization. Addition of ammonium bicarbonate to ammonium alum solution precipitates ammonium aluminum carbonate which may be heated to produce alumina, ammonia, and carbon dioxide. The remaining iron rich liquor also contains magnesium sulfate. Addition of oxalic acid generates insoluble ferrous oxalate which is thermally decomposed to ferrous oxide. Carbon monoxide reduces the ferrous oxide to metallic iron.

Abstract: A method for producing briquettes from pellet fines, DRI sludge, DRI fines and dust from DRI dedusting systems and, in this way, reincorporating same into steel production processes, thereby contributing to the re-use of the by-products of these processes, as well as minimizing the stocks of these types of materials and, consequently, helping to improve the environment. The invention comprises: grinding and sieving the pellet fines and the DRI sludge; sieving the DRI fines; storing the dust from DRI dedusting systems; briquetting with roller presses, using liquid sodium silicate and bentonite or composite Portland cement as binders; sieving the briquettes; shredding the edges and waste of the fresh briquettes; and curing in order to improve the physical properties thereof, such as strength. Once cured, the fresh briquette can be stored or sent directly to direct-reduced iron production processes for use as part of the feedstock for reduction ovens or reactors.

Abstract: Provided are a method and an arrangement for operating a metallurgical furnace. The method comprises a feeding step, and a temperature controlling step for controlling the temperature of a molten metal layer and a slag layer in a furnace space of the metallurgical furnace. The temperature controlling step comprises a first measuring step for measuring the slag temperature (Tslag), a second measuring step for measuring the slag liquidus temperature (Tslag, liquidus), and a calculating step for calculating a superheat temperature (Tsuperheat) by calculating the temperature difference between the slag temperature (Tslag) and the slag liquidus temperature (Tslag, liquidus). In case the calculated superheat temperature (Tsuperheat) is outside a predefined superheat temperature range (Tsuperheat set), the method comprises an adjusting step for adjusting to adjust the actual superheat temperature. Also provided are computer program products.

Abstract: A method of producing an exothermic mold powder in a form of sprayed granules of the present invention includes spray-drying into granules, an aqueous slurry containing: a raw material blend; and a metal silicon powder and/or a silicon alloy powder, the method comprising adjusting the pH of the aqueous slurry to 13 or less.

Abstract: Systems and methods for efficiently performing rotary batch decoating can use time-offset batch reactors. A first batch reactor can operate out of phase with a second batch reactor, so that the burning of pyrolysis gases from the first reactor can be used to provide fuel to the incinerator used to heat the material in the second reactor. After the first reactor is dumped and filled with new material, the pyrolysis gases from the second reactor can be used to provide fuel to the incinerator, which heats the material in the first reactor.

Abstract: A method of operating a BOF bottom stir tuyere having an inner nozzle surrounded by an annular nozzle, including during a hot metal pour phase and a blow phase, flowing an inert gas through both nozzles; during a tap phase, initiating a flow of a first reactant through the inner nozzle and a flow of a second reactant through the annular nozzle, and ceasing the flow of inert gas through the nozzles, wherein the first and second reactants includes fuel and oxidant, respectively, or vice-versa, such that a flame forms as the fuel and oxidant exit the tuyere; during a slag splash phase, continuing the flows of fuel and oxidant to maintain the flame; and after ending the slag splash phase and commencement of another hot metal pour phase, initiating a flow of inert gas through both nozzles and ceasing the flows of the first and second reactants.

Abstract: The invention relates to granules composed of agglomerated reactive bulk material and a binder matrix, the binder matrix comprising as binder an organic or inorganic salt.

Abstract: The invention relates to a method for removing metal and/or precious metal-containing depositions from substrates. The substrate is subjected to treatment with an organo amine protectant component P and an inorganic active component A. Component P may be formed in situ by reaction with component R. Component P is an organic amine and/or organic amine hydrochloride. Component A is an inorganic compound and component R is an organic compound that can be split along the C—N bond by the component A into an organic amine. The metals in the form of organo-metallic complexes can be isolated and/or separated by means of different chemical reactions and/or biosorption.

Abstract: A method for the pyrometallurgical processing of a sulphide material containing copper, the sulphide containing relatively high quantities of silica and relatively low quantities of iron, wherein the process comprises feeding the sulphide material to a TSL furnace operated under oxidising conditions such that the sulphide material forms blister copper containing between 1.2 and 1.5 wt % sulphur and a slag containing between 7 and 13 wt % copper.

Abstract: The invention relates to a plant complex for steel production comprising a blast furnace for producing pig iron, a converter steel mill for producing crude steel and a gas-conducting system for gases that occur when producing the pig iron and/or producing the crude steel. According to the invention, the plant complex additionally has a chemical plant or biotechnological plant, connected to the gas-conducting system, and also energy storage for covering at least part of the electricity demand of the plant complex. Also the subject of the invention is a method for operating the plant complex.

Abstract: A method of improving metal leach kinetics and recovery during atmospheric or substantially atmospheric leaching of a metal sulfide is disclosed. In some embodiments, the method may comprise the step of processing a metal sulfide concentrate in a reductive activation circuit 220 that operates at a first redox potential, to produce a reductively-activated metal sulfide concentrate. The method may further comprise the step of subsequently processing the activated metal sulfide concentrate in an oxidative leach circuit 240 to extract metal values. In some disclosed embodiments, reductive activation steps and/or oxidative dissolution steps may employ mechano-chemical and/or physico-chemical processing of particles or agglomerates thereof. Reductive activation may be made prior to heap leaching or bio-leaching operations to improve metal extraction. Systems for practicing the aforementioned methods are also disclosed.

Abstract: Methods for the treatment of metallic particles such as heavy metal particles and objects contaminated with the metallic particles. For the treatment of objects contaminated with the metallic particles, a stabilizing composition may be applied to the object with or without a fixation agent. For the treatment of free-flowing metallic particles, an agglomeration agent may be used with or without a stabilizing agent.

Abstract: A production method for smelting clean steel from full-scrap steel using duplex electric arc furnaces. Electric arc furnaces located in two positions are connected in series, wherein the electric arc furnace in a first position is dephosphorization electric arc furnace, and the electric arc furnace in a second position is a decarbonization electric arc furnace. The production method includes: performing smelting by combining a decarbonization electric arc furnace and 1-3 dephosphorization electric arc furnaces; a specific process of performing the smelting includes: in a charging period of the 1-3 dephosphorization electric arc furnaces, adding the full-scrap steel for the smelting, lime, slag in the decarbonization electric arc furnace, auxiliary materials and carbon powder or a carbon block into the dephosphorization electric arc furnace.

Abstract: This invention relates to magnetite-based sintered iron ore wherein a magnetite ore powder, which is not currently utilized owing to its low reducibility index among iron ore materials serving as a main material in iron-making processes, is improved so as to have a high reducibility index, and to a method of manufacturing the same.