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WO/1993/008936A1 |
A method for removing one or more contaminations from a bulk material, the bulk material being fed to a treating chamber (1), exposed herein to a temperature treatment and discharged. According to the invention the bulk material is expos...
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WO/1992/022779A1 |
The invention provides an improved method and apparatus for feeding solids to a fluidized bed reactor (7). A back pressure control valve (5) regulates the pressure drop between the pressure above a solids column in a standpipe (4) and th...
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WO/1992/019623A1 |
A novel zerovalent copper species and an organocopper reagent are disclosed. The zerovalent copper species is directly produced by reaction of a reducing agent with a combination of copper cyanide or halide and an alkali metal halide sal...
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WO/1992/014851A1 |
The invention relates to a process for the production of metallic titanium, characterized in that the process comprises reducing a titanium-fluorine compound selected from titanium tetrafluoride and any hexafluorotitanate soluble in a mo...
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WO/1992/012264A1 |
A fluidized bed preliminary reducing furnace for raw material comprising an oxide, which is provided with at least two ports for feeding a reducing gas in the furnace. According to the present invention, the fed particulate raw material ...
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WO/1992/011499A1 |
A method and apparatus for controlling the temperature of exothermic processes in fluidized bed reactors. A venturi (30) is arranged in the circulating fluidized bed reactor, through which the particle suspension flows from the lower por...
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WO/1992/008815A1 |
A process for the treatment of zinc sulfide or other zinc bearing feed materials in conjunction with an iron sulfide containing mineral or compound to effect a separation of zinc from iron by fuming of either zinc and sulphur vapour or z...
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WO/1992/004121A1 |
A process for enhancing ilmenite from deposits of mineral sands or mineral concentrates comprises a single stage fluidised bed magnetising roast (16). A temperature of 650 °C - 900 °C in an excess of a carbonaceous fuel (such as coal/c...
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WO/1992/003581A1 |
A process for enhancing fluidization in a fluidized bed reactor chamber (18). In a preferred embodiment, molybdenum oxide (12) is reduced to molybdenum metal in the fluidized bed (30). An oxidant (52) is introduced into the fluidized bed...
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WO/1992/002646A1 |
A novel process for the conversion of reactor feed to iron carbide is provided. The process includes the step of preheating the reactor feed in a kiln (106), in an oxidizing atmosphere (104). The iron carbide produced by the process is p...
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WO/1992/002648A1 |
A method of extracting valuable metals from leach residues containing those metals, said method comprising the steps of: (1) feeding the leach residue to a furnace, (2) smelting the leach residue by means of a submerged lance under reduc...
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WO/1992/002647A1 |
A method of controlling product quality in a conversion of reactor feed to an iron carbide-containing product in a fluidized bed reactor (16). A Mossbauer analysis is performed (18) on product samples leaving the fluidized bed reactor (1...
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WO/1991/014005A1 |
A process and a smelt reduction vessel (1) for producing metals and metal alloys, in particular iron and iron alloys, from metal oxides and ores in a smelt reduction vessel. The process and the vessel are characterised in that loss of li...
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WO/1991/013182A1 |
A process for the deoxidation of a refractory metal containing minor concentrations of oxygen is disclosed. In this process the refractory metal is contacted with a metallic deoxidant in a dry, inert atmosphere. The metallic deoxidant an...
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WO/1991/013180A1 |
The specification describes a process for producing synthetic rutile from a titaniferous ore or concentrate. The process involves three basic steps which are reduction, removal or iron by leaching or aeration and removal of other impurit...
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WO/1991/008317A1 |
Zinc may be recovered from zinc sulphide concentrates by establishing a molten slag bath at 1150 °C to 1300 °C containing ferrous and ferric oxides, dissolving zinc sulphide in the bath, oxidizing the zinc sulphide by reaction with the...
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WO/1991/005881A2 |
A method is provided for removing chromium from a chromium containing waste material wherein the waste material is dried by indirect heating, sized to a particle size of less than 0.105 mm, mixed with alkaline and oxidizing reactants, an...
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WO/1991/005879A1 |
A process for smelting of iron containing, nickel oxide material, such as nickel laterite, for the recovery of nickel. The oxide material is subjected to a smelting operation in a fuel fired furnace of a top-submerged lancing furnace sys...
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WO/1991/002824A1 |
Metallurgical waste materials, which are environmentally unacceptable for such applications as land fill, storage in open dumps and plastic lined ponds, because of the contamination of the ground water, may be processed to recover the us...
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WO/1990/015162A1 |
The specification discloses a process for pre-heating and pre-reducing metal oxide ores. The process comprises introducing particles of an oxide ore entrained in a gas through a port into a treatment chamber. Inside the treatment chamber...
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WO/1990/008843A1 |
This invention relates to a process for the direct smelting of ores, metallic compounds and the like with the use of a heat plasma. This process can be readily conducted with a simple installation irrespective of the shape of the object ...
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WO/1990/007012A1 |
A process for the production of a metal, alloy or ceramic material which comprises subjecting a mixture of at least one reducible metal compound and at least one reducing agent to mechanical activation to produce a metal or alloy. A cera...
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WO/1989/009290A1 |
A method and apparatus for producing, in a reactor, a suitable prereduced product for final reduction from material containing metal oxide. The material is preheated in a fluidized bed by means of hot gases from a subsequent prereduction...
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WO/1989/008724A1 |
A reduced chromium-ore bearing powder used for producting of a chromium-containing steel in a converter, is produced by a reduction of chromium-ore powder having a particle-diameter of 3 mm or less by a carbonaceous reducing agent having...
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WO/1989/008153A1 |
In a process for implementing reducing pyrometallurgical processes with oxyde ores, concentrates, intermediate products or metallic intermediate products by means of strongly reducing gases or oxygen-containing gases for producing and re...
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WO/1989/007502A1 |
The present invention relates to a method of continuously producing metal fibers, which comprises the steps of providing a plurality of nucleation sites of metal by injection a stream of gaseous metal carbonyl into a reaction chamber (17...
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WO/1989/004379A1 |
An admixture of mineral ore or concentrate and particulate carbon is irradiated with microwave energy to produce metallic droplets and the droplets are collected. In a preferred form the apparatus includes a hopper (11) which feeds the a...
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WO/1989/002477A1 |
This invention relates to a method of preventing, during the melt-reduction of Cr ore or iron ore, the scatter loss of the ore and coal at the time of charging. In the present invention, the ore and coal are charged down into a furnace f...
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WO/1989/001530A1 |
The present invention relates to a method for monitoring and control of smeltmetallurgical processes, endothermic as well as exothermic ones, preferably pyrometallurgical processes, by means of optical spectrometry, whereby one first det...
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WO/1989/001532A1 |
A process for directly obtaining high Cr content melt by melt reduction of Cr starting materials such as Cr ore pellets, etc. is disclosed, which comprises using a furnace equipped with a bottom-blowing nozzle, a side-blowing nozzle, and...
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WO/1989/000613A1 |
Magnesium is produced by the metallothermic reduction of MgO in a molten slag bath comprised of MgO, Al2O3 and CaO together with oxide formed from the reducing metal. The composition of the slag is controlled during at least a first stag...
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WO/1988/009390A1 |
In a process and a device for implementing hot chemical processes, in particular for melting and/or reduction by melting of batches of metallurgical dust, ores and other meltable or melt-reducible materials, such as SiO2, MgO, TiO2, Ta2O...
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WO/1988/006190A1 |
Method and furnace providing for first obtaining a melt in a crucible (10) having a rectangular horizontal cross-section, feeding an oxygen-containing gas (3) into the melt under its surface through tuyeres (13) with nozzles (14), mounte...
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WO/1986/007097A1 |
A method of obtaining a desired metal, selected from the group consisting of titanium, aluminium, iron, manganese, hafnium, zirconium, tantalum, vanadium, uranium and tungsten, which comprises reacting a halide of the desired metal with ...
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WO/1986/006361A1 |
Preparation of metal carbides, nitrides, borides, silicides and phosphides, also metal alloys and pure metals, by providing a precursor in which there are organic ligands bonded to the metal or metals, such precursor having the element X...
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WO/1986/005211A1 |
A method for working-up valuable metal-bearing waste products, particularly but not exclusively copper scrap, containing a substantial amount of organic constituents, to a product form suitable for recovering the valuable-metal content, ...
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WO/1985/000834A1 |
Process for the recovery of non ferrous and precious metals from carbon-containing materials particularly coking products by using a thermal process. A carbon-containing material having a certain content of non ferrous and/or precious me...
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WO/1984/002515A1 |
Process for producing solar grade silicon wherein a reduction reaction preferably the reduction of SiF4 by sodium metal (12) is carried out by jetting a spray (62) of reactants into a reaction chamber (80) at a rate and temperature which...
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WO/1984/000562A1 |
Valuable metals are recovered from metal-containing materials, such as scrap or waste materials, in which the metal is present in chemically combined form, by a process which comprises contacting the metal-containing material with a reag...
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WO/1983/002956A1 |
Substantially completely deoxidized, consolidated dispersion-strengthened copper stock of sizable cross-section and particulates capable of being thus consolidated into such stock are shown. The stock exhibits ductility substantially gre...
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WO/1982/001724A1 |
Metal is produced from fine-grain iron-containing metal oxide material. In a first reduction stage the oxide material is at least partially reduced in a fluidized state at a temperature of approximately 1025 - 1275 K, using a reduction g...
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WO/1981/003342A1 |
A metallurgical furnace (1 to 15, in Figures 1 & 2) for and a process of melting, refining and processing metals and for the reduction of ores thereof by the non-stoichiometric combustion of a fluid fuel and a combustion-supporting gas w...
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WO/1981/001715A1 |
For the continuous reduction and melting of metal oxides or substantially prereduced metal materials a fuel is completely burnt in a crucible. The crucible (8) opens at its upper part to a tight and substantially horizontal supply condui...
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WO/1981/001159A1 |
Process and apparatus for recovery of hydrogen-reduced metals from aqueous salt solutions at a porous hydrophobic catalytic barrier (2). Previously, the prior art provided a diffusion barrier between a hydrogen anode and a cathode to pre...
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WO/1981/000262A1 |
An oxidized liquid slag coming most of ten from prior metallurgic operations and still containing from 10 to 40% of manganese as MnO, is treated, under stirring, by a reducing alloy based on silicium (silicium content at least equals 60%...
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WO/1980/002652A1 |
Apparatus for reducing finely divided iron oxide material, comprising a reactor (1) containing a vertical upper reaction chamber (2) connected downwardly to a narrower, vertical reaction chamber (3) A cyclone separator (8) is connected t...
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WO/1980/001287A1 |
Process for the direct production of copper metal by directing an aqueous slurry of cupriferous material into a molten cupriferous bath maintained at a temperature of 2100 to 2400 F. Neither the cupriferous material of the slurry nor tha...
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WO/1979/001056A1 |
Copper is recovered from copper salts selected from the group consisting of copper chlorides, copper oxides and copper oxychlorides by reducing the finely divided solid copper salts with hydrogen under turbulent conditions at a temperatu...
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WO/1979/000055A1 |
A method for the manufacture an additive material for the production of crude iron which comprises charging an iron sulphidic material to a furnace space together with oxygen and a silicate-containing material in relative proportions suc...
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JP2024051001A |
An object of the present invention is to provide a method for recovering precious metals that can further reduce recovery loss of precious metals in recycled raw materials. [Solution] A recycled raw material 30 is put into a melting furn...
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