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WO/1997/027143A1 |
The present invention concerns a procedure for production of high purity metals, their alloys and other species from feldspars and feldspar containing rocks. Silicon "metal" (Si) and aluminium oxide (Al2O3) are produced by electrolysis. ...
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WO/1997/026380A1 |
A method for converting a ligated-metal into chemical components of the ligated-metal includes forming an ionized zone that can convert the ligated-metal to a reduced ligated-metal intermediate. The ligated-metal is directed into the ion...
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WO/1997/021843A1 |
The process for processing waste or fractions thereof, e.g. domestic rubbish, light car shredder fractions or the like, comprises pyrolysis, gasification and/or burning in which the residues are melted in reducing conditions. The reduced...
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WO/1997/020958A1 |
The process for the recovery of cobalt product from a molten slag having cobalt- and iron-containing constituents, uses a top-submerged lancing injection furnace system. The slag is smelted in a furnace of the system by: (i) charging car...
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WO/1997/018338A1 |
Finely divided material such as flue dust from a steel making furnace is processed to reclaim constituents. The material in hopper (11) is pelletized. The pellets are dried in a dryer (16) and fed to a first rotary kiln (21) where they a...
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WO/1997/017473A1 |
The production of highly metallised feed, an intermediate product produced solely by gaseous reductants in two stage reduction processes of that kind, encounters sticking problems, which interfere with continuous processing and productiv...
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WO/1997/016576A1 |
A thermo-mechanical process for producing aluminium or other metals from aluminium or metal compounds, is described, whereby aluminium oxide or similar aluminium compounds or similar other metal compounds, are heated by friction generate...
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WO/1997/016275A1 |
The preparation of suitable powdered metal is important in powder metallurgy technology. To date powdered metals, in particular refractory metals, have been produced using very time-consuming and, consequently, costly methods by the redu...
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WO/1997/013881A1 |
The invention relates to a method for treatment of waste products that contain organic materials, such as plastic and like organic materials, and frequently also containing metal values, including precious metals, by thermal processing, ...
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WO/1997/007917A1 |
A new, cost effective process for the production of ultrafine particles which is based on mechanically activated chemical reaction of a metal compound with a suitable reagent. The process involves subjecting a mixture of a metal compound...
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WO/1997/006281A1 |
A process for at least partially reducing iron oxides comprises forming a bed of reactants on a hearth of a rotary hearth furnace, the reactants comprising (a) mixture of iron ore fines and particulate carbonaceous material and/or (b) mi...
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WO/1997/000333A1 |
A method of extracting at least zinc from zinc-bearing materials which includes the steps of feeding the zinc-bearing material and a reducing agent at a controlled rate to a reaction zone in a d.c. arc furnace wherein at least zinc is vo...
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WO/1996/039703A1 |
A method and apparatus producing halogenated products from metal halide feeds. In one embodiment, uranium hexafluoride is treated by separating fluorine from the metal of the uranium hexafluoride. Uranium hexafluoride is introduced into ...
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WO/1996/038380A1 |
The process for converting feed materials of high mineral content containing primary metal values and fluorine values to the primary metal or useful compounds thereof and to fluorine values or useful compounds thereof, wherein the feed m...
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WO/1996/034987A1 |
A process for recovering iron from an iron oxide bearing mass. The process includes forming a bed (27) of lump coke (28) in a vertical shaft furnace (11), feeding the iron oxide bearing mass and scrap metal onto the bed (27) of lump coke...
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WO/1996/032516A1 |
Residues which arise from industrial processes and the burning of rubbish and contain heavy metals and/or heavy metal compunds are subjected to a two-stage reduction process providing re-usable metal and silicon-containing alloys. In a f...
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WO/1996/031631A1 |
A method and a plant for treatment of fly ash are described, wherein heavy metals are separated and wherein there is formed a leaching resistant slag. The treatment takes place in a reactor (2) and the fly ash is introduced into an oxidi...
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WO/1996/029435A1 |
The invention concerns a process for reducing ore fines by means of reducing gas in a fluidized bed process. In order to obtain a homogeneous degree of metallization whilst making optimum use of the reducing gas and minimizing the amount...
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WO/1996/024696A1 |
To produce pig iron or steel and cement clinker from slags, it is proposed that liquid slags containing iron oxide, e.g. slags from steelworks, should be converted with iron oxide carriers (such as ore, scales or similar materials) and l...
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WO/1996/017090A1 |
A method for producing an iron-based feedstock suitable for use as the feedstock for steel mills, from industrial waste streams, by treating the waste stream with an ammonium chloride leaching solution, separating the undissolved precepi...
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WO/1996/012045A1 |
A plant for producing raw iron and/or sponge iron has a direct-reduction shaft furnace (1) for lump iron ore, a melt gasifier (3), a conduit connecting the melt gasifier (3) to the shaft furnace (1) for a reducing gas, a supply conduit (...
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WO/1996/010097A1 |
The invention concerns a method of processing solid residues from waste-incineration plants, the method calling for the slag to be melted and heavy metals to be separated from the slag for recycling. The slag is transferred directly from...
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WO/1996/010094A1 |
The invention concerns a process for reducing particulate oxide-containing material by fluidization wherein the oxide-containing material is held in an upward flowing reduction gas in a fluid bed and thus reduced. In order to prevent or ...
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WO/1996/008585A1 |
A method for recovering metals from industrial waste streams (500) which entails treating the waste streams with an ammonium chloride solution (100), separating the undissolved precipitates comprising iron compounds from the leachant sol...
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WO/1996/006195A1 |
According to the invention oxygen-enriched air is blown into the melt through compound underbath nozzles, oxygen or oxygen-enriched air being blown in through the inner pipe and air through the outer pipe. The flow rate of the two gases ...
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WO/1996/004407A1 |
A method of producing a non-metal element or a metal or an alloy thereof from a halide or mixtures thereof. The halide or mixtures thereof are contacted with a stream of liquid alkali metal or alkaline earth metal or mixtures thereof in ...
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WO/1996/003181A1 |
The method consists in separating the ions of heavy metals present in ashes resulting from the incineration of solid residues or from any process involving combustion or thermal destruction reactions, through selective precipitation, in ...
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WO/1995/035393A2 |
In a method for the production of steel in an environmentally benign fashion, energy sources other than conventional fossil fuels are used to produce reductant fuels. These reductant fuels are used for the reduction of iron ore and its c...
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WO/1995/030626A1 |
A method for the recovery of chemical values, such as metals including zinc, zinc oxide, iron-carbon feedstocks, lead and cadmium, from industrial waste streams which entails treating the waste streams with carbon and an ammonium chlorid...
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WO/1995/025824A1 |
A method and apparatus for continuously producing metals such as zirconium, hafnium, titanium, niobium, vanadium, silicon and tantalum. The corresponding metal halide is reacted with a metallic reducing agent such as aluminum, calcium, m...
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WO/1995/017981A1 |
A method and a d.c. arc furnace for thermal treatment of an ash, wherein reducing conditions are established within a closed and sealed furnace, the ash is supplied via a channel (21) arranged in an electrode and fed from the open free e...
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WO/1995/017527A1 |
The invention relates to a process for extracting metal from metal ores, especially iron from iron ore. According to the invention, the carbon and/or hydrocarbon-containing substances used to generate the reducing gas consist at least pa...
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WO/1995/008701A1 |
A valve driving system for internal combustion engines comprises a cam shaft (20) adapted to be rotated by a crankshaft, a cam lobe (38) rotatably mounted on the cam shaft (20), a cam (24) formed integral with the cam lobe (38) and adapt...
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WO/1995/008652A1 |
A method and apparatus of introducing one or more reagents into a rotary and/or elongate kiln in which titaniferous material is being treated e.g. upgraded wherein the reagent(s) is introduced (I) at a plurality of locations along the le...
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WO/1994/026941A1 |
Method for processing solid products containing a low melting point metal, comprising heating these products in a first zone, thermolyzing (2) them in a second zone at subatmospheric pressure while collecting, by means of an externally c...
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WO/1994/024318A1 |
An electrical apparatus is provided for the conversion of compounds, elements, or mixtures which are in particulate form, into new compounds, elements or mixtures in gaseous, liquid, or particulate form. In a reaction chamber, particulat...
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WO/1994/021832A1 |
Zinc is recovered from zinc sulphide material by introducing such material at a feed station (42) into a molten copper sulphide matte which is circulated in a closed loop path through said feed station (42), a zinc recovery station (16) ...
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WO/1994/016111A1 |
A method is disclosed of producing a corrosion resistant product from a billet comprising a core of finely divided ferrous swarf compacted into briquettes in a stainless steel jacket and in which the billet is heated to a temperature at ...
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WO/1994/012674A1 |
In the process according to the invention for obtaining metals and compounds and alloys thereof from ore, the charge is prepared by mixing the crushed ore with additives comprising chemical elements found in the ore compounds; oxidized t...
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WO/1994/009166A1 |
A method for oxidizing treatment of molten matte and at the same time directly smelting sulphidic concentrate in a refractory-lined liquid bath reactor, e.g. a converter, into which oxidizing air is introduced below the surface of the li...
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WO/1994/008057A1 |
A method for the recovery of zinc oxide from industrial waste materials of various components, including zinc, lead, iron and cadmium, by roasting the waste material at an elevated temperature, treating the waste material with an ammoniu...
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WO/1994/005818A1 |
A process and condensing system (10) is provided for condensing zinc and other metal vapors from a gaseous stream. A duplex condensing bath is provided, having a bottom layer of molten zinc and a top layer comprising a liquid condensing ...
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WO/1994/003647A1 |
A process for facilitating the removal of impurities e.g. radionuclides, such as uranium and thorium, and/or one or more of their radionuclide daughters, from titaniferous material includes contacting the titaniferous material with one o...
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WO/1993/024251A1 |
A method of successfully disposing of, or recycling, waste metals comprising placing the waste metals in an aluminum container (10), placing the container (10) in a crucible (14) containing a mixture (16) of powdered aluminum and iron ox...
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WO/1993/024263A1 |
Novel zerovalent metal species and organometallic reagents are disclosed. The zerovalent metal species are directly produced by reaction of a reducing agent on a metal cyanide salt. Preferably, the zerovalent metal species are directly p...
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WO/1993/022001A1 |
An environmentally sound process is described for the remediation of waste materials that allows the separation, recovery and decontamination of metals. The method includes chemically reducing essentially all of a reducible toxic and pot...
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WO/1993/020898A1 |
The object of the invention is to provide a process and the corresponding industrial Plant(s) which make feasible the thermal treatment of Hazardous Waste of different nature and origin also mixed, excluding the release of harmful efflue...
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WO/1993/015232A1 |
A method of reducing material containing metal oxide in a circulating fluidized bed, in which coal in excess and air is introduced into the fluidization chamber (12) so as to maintain a temperature of > 850 °C in the chamber. Bed materi...
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WO/1993/014232A1 |
The present invention concerns a new process and the relative plant for reducing hexavalent chromium contained in the resultant earth after the production of chromium, in order to obtain the transformation from water-soluble compounds in...
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WO/1993/014030A1 |
A method for the recovery of zinc oxide from industrial waste materials of various components, including zinc, lead, iron and cadmium, comprising the steps of treating the waste material with an ammonium chloride solution maintained at a...
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