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| Number | Title | Issue Date |
| 7449142 | Plant for use in continuous steelmaking process A plant for the continuous manufacture of steel includes a direct reduction furnace for producing direct reduced iron (DRI) and a stationary electric arc furnace for melting the DRI. The electric arc furnace has a plurality of electrodes for melting the DRI. Heat fo... | 11/11/2008 |
| 7279127 | Continuous steelmaking plant The present invention provides a process plant for the production of molten steel from primary and/or secondary ferrous materials in which no free oxygen is permitted to contact directly carbon-containing iron melts, comprising:—i) at least three pairs of furnaces... | 10/09/2007 |
| 6235235 | System for extracting sodium metal from sodium hydroxide and a reductant of natural gas An apparatus and system for its use for a continuous production on an alkali metal, preferably sodium metal, by a reduction of the metal hydroxide with methane or natural gas as a reductant. The invention is preferably utilized with sodium hydroxide as is... | 05/22/2001 |
| 6051182 | Apparatus and process for the direct reduction of iron oxides A separator for use in a direct reduction reactor comprises an elongated tubular housing having a cooling chamber for receiving a cooling medium for cooling the internal wall surface of the separator contacted by metallized iron fines.... | 04/18/2000 |
| 5398915 | Apparatus for continuous copper smelting There is disclosed an apparatus for smelting copper which includes a smelting furnace, a separating furnace, a converting furnace, and launders connecting these furnaces in series. In the smelting furnace, copper concentrate is melted and oxidized to prod... | 03/21/1995 |
| 4985068 | Method and apparatus for smelting iron oxide Energy for melting iron oxide or wustite is supplied by pre-heated natural gas which is combusted with oxygen in gaseous form and the oxygen contained in the preheated feed materials. Such combustion produces carbon monoxide and hydrogen gas, thus the com... | 01/15/1991 |
| 4430116 | Method and apparatus for heating or heating and reduction raw materials for a metallurgical furnace utilizing waste gases from the same furnace An apparatus for heating or heating and reduction raw material of a metallurgical furnace, utilizing high temperature waste gases which are released from the same furnace, has one or plural numbers of reactor(s) capable of holding the raw materials in the... | 02/07/1984 |
| 4294433 | Pyrometallurgical method and furnace for processing heavy nonferrous metal raw materials A method for processing heavy nonferrous metal raw materials by heating and melting said raw materials in a molten slag with the formation of a heterogeneous melt consisting of a sulfide and an oxide phases. The melt is bubbled oxidized by injecting a gas... | 10/13/1981 |
| 4236700 | Device for suspension smelting of finely-divided _oxide and/or sulfide ores and concentrates A process for the suspension smelting of finely divided oxide and/or sulfide ores and concentrates, especially iron-rich copper and/or nickel concentrates, in which a suspension of a finely-divided feed mixture in pre-heated air and/or oxygen is fed downw... | 12/02/1980 |
| 4143865 | Flash smelting furnace A flash smelting furnace has an outer metallic shell from which portions are cut out to expose the outer surface of the refractory lining at a depth corresponding to the location of the matte-slag interface, and gaseous cooling jets are directed onto the ... | 03/13/1979 |
| 4088310 | Apparatus for suspension smelting of finely-grained oxide and/or sulfide ores and concentrates A suspension smelting furnace is disclosed for the suspension smelting of finely-grained oxide or sulfide ores and concentrates, and provided with a horizontal lower furnace to which have been connected the lower ends of at least one vertical suspension r... | 05/09/1978 |
| 4015069 | Apparatus for extracting metals from ore An apparatus for extracting metals from ore by electrical discharge therethrough which melts the available metallic values into separated nuggets. Pulverized ore, preferably ionized, is supported upon one electrode and subjected to random discharge of ele... | 03/29/1977 |
| 4005856 | Process for continuous smelting and converting of copper concentrates An apparatus for the continuous smelting and converting of copper containing concentrates to copper or matte involves charging concentrates into a reactor which is maintained at a temperature at which a molten bath of slag, matte and metallic copper is fo... | 02/01/1977 |
| 3948639 | Process and device for flash smelting sulphide ores and concentrates A process and device to be used in the flash smelting of sulphide ores or concentrates is disclosed, wherein the gases emerging from the rising zone of the flash smelting furnace are fed together with the sulphide ore or concentrate into a pretreatment zo... | 04/06/1976 |
