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| Number | Title | Issue Date |
| 7192552 | Facility for reducing metal oxide, method of operating the same, and shaped article of raw material for reducing furnace The present invention provides a reducing furnace of the rotary hearth-type and a method for reducing a metal oxide simplified in the process from dehydration to molding, according to which a moisture-rich powdery raw material is reduced at low cost. The present inv... | 03/20/2007 |
| 6973955 | Heated trough for molten metal A trough is described for carrying molten metal, comprising an outer shell defined by a bottom wall and two side walls, an insulating layer filling the outer shell and a conductive U-shaped refractory trough body for carrying molten metal, the trough body being embe... | 12/13/2005 |
| 6938739 | Brake head positioner A brake head positioning means for railcar braking systems. The brake head positioning means is comprised of an attachment means that is engageable with a railcar hanger arm for attaching such brake head positioning means to such railcar hanger arm. An extension mea... | 09/06/2005 |
| 6399016 | Direct smelting plant Direct smelting plant for producing molten metal from a metalliferous feed material induces a smelting vessel 11 to hold a molten metal and slag bath beneath a hot gas space. Solids injection lances 27 extend downwardly and inwardly through side walls of ... | 06/04/2002 |
| 5997609 | Sponge iron production process and plant In a process for producing sponge iron from particulate iron oxide-containing material, the iron oxide-containing material in a reduction zone is reduced to sponge iron by means of reducing gas and the gas forming during reduction is withdrawn as top gas.... | 12/07/1999 |
| 5574956 | Method and apparatus for treatment sulphidic concentrates 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 liquid bath. For add... | 11/12/1996 |
| 5339329 | Induction heated meniscus coating vessel A shallow vessel (50,52) for being horizontally disposed when containing a molten metal or metal alloy (66) for meniscus coating one side of a clean metal strip (34A) when the strip is moved vertically past one side of the vessel. The vessel includes a sh... | 08/16/1994 |
| 4783217 | Method and apparatus for producing spherical objects A method and apparatus for producing spherical objects is disclosed, the apparatus having a reservoir filled with a relatively dense molten material, the reservoir being heated and hydraulically pressurized to maintain the molten state of the dense materi... | 11/08/1988 |
| 4652309 | Sonic method and apparatus for heap leaching A liquid impervious covering such as a plastic membrane or a concrete flooring is installed over an extensive substantially level area of ground and mined metal ore heaped onto this covering to form a mound. A leachant liquid solution is poured onto the o... | 03/24/1987 |
| 4613366 | Continuous reactive metal reduction using a salt seal This is a method for reducing the chlorides of zirconium, hafnium, or titanium. It utilizes a solidified magnesium (or sodium) chloride matrix in which chunks of the product metal are contained as a seal on the bottom of the reduction vessel. A withdrawal... | 09/23/1986 |
| 4531717 | Preheated trough for molten metal transfer A covered trough for conveying molten metal, wherein the trough includes a channel of refractory material within a metal shell, and the cover includes a layer of refractory insulation to reduce heat loss and means for preheating the trough such as a gas-f... | 07/30/1985 |
| 4309024 | Cupola with auxiliary gas generator A cupola for the melting of metal is provided with an auxiliary gas generator which supplies through the forehearth hot carbon monoxide rich gas to the bottom of the cupola as a source of heat. The heat of the gases maintains the cupola hearth and forehea... | 01/05/1982 |
| 4270740 | Apparatus for producing molten iron by submerged combustion Apparatus for reducing particulate iron oxide and producing molten iron in which coal and oxygen are injected into a molten iron bath to melt the iron, gasify the coal and produce a hot off-gas which is then used as the reductant in a counterflow shaft fu... | 06/02/1981 |
| 4223876 | Apparatus for direct recovery of metal from metal-bearing ores Iron, for example is directly recovered from relatively fine-grained (having a grain particle size range of less than 250 microns), iron-bearing ore whereby carbon-containing materials and oxygen-containing materials are fed through a molten metal bath an... | 09/23/1980 |
| 4213599 | Apparatus for the production of aluminium In a apparatus for the production of aluminium a molten alumina slag, containing combined carbon is circulated through one or more alternately arranged relatively low temperature zones where carbon is added to increase the combined carbon content of the s... | 07/22/1980 |
| 4114862 | Processes and installations for melting pig-iron in a cupola furnace The invention relates to an installation for melting pig-iron comprising a cupola furnace, a combustion chamber burning the waste gases leaving this cupola furnace. This installation comprises furthermore a heat exchanger between the flue gases leaving th... | 09/19/1978 |
| 4097032 | Forehearth with weir, particularly for use in a basalt smelting furnace A forehearth of a smelting furnace which includes a weir used in conjunction with a float essentially in the form of a U disposed in a horizontal position, with the opening of the U disposed adjacent to the discharge opening of the weir, the float having ... | 06/27/1978 |
| 4083715 | Smelting plant and method Iron-containing materials are loaded into the top of a shaft furnace to form therein an upright column of the materials. A burner forms a flame above the floor of the furnace to heat the base of the column and thereby melt the materials at the base of the... | 04/11/1978 |
| 4058394 | Pyrometallurgical system for solid-liquid contacting Disclosed is a pyrometallurgical reactor for entraining a low density particulate solid (e.g., coal) in a high density liquid (e.g., slag) in order to promote and accelerate reactions dependent upon contact between the solid and the liquid. The present di... | 11/15/1977 |
| 4056262 | Cupola furnace to enable continuous smelting and refining of cement copper and method therefor Use of a shaft kiln in continuous smelting and refining of cement copper is made possible with a mix preheater, a refined gas preheater, an air preheater, an air mix feeder and forehearths for cement oxidation and reduction, and wherein oxidation is achie... | 11/01/1977 |
| 4036479 | Cupola furnace An improved cupola furnace which comprises, in combination, on the one hand at least one tap hole for the pig iron opening into the crucible level with the hearth, a passage for evacuating the slag and air-blowing tuyeres, on the other hand, a storage tan... | 07/19/1977 |
| 3966460 | Reduction of metal halides A process for producing zirconium or hafnium metals by the reduction of their tetrachlorides with an excess of molten magnesium is provided with increased reactor capacity, increased yield per run, and improved economy by virtue of withdrawal of magnesium... | 06/29/1976 |
