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| Number | Title | Issue Date |
| 8124005 | Process and apparatus for producing sponge iron A process and an apparatus for producing sponge iron from iron-oxide-containing material in lump form by direct reduction in a reduction shaft using a reducing gas, wherein the entire reducing gas is introduced by means of a number of reducing gas distribution ducts... | 02/28/2012 |
| 8071013 | Melting starting material in a cupola furnace The invention relates to operating a shaft furnace, in particular a cupola furnace, for melting starting material, wherein the shaft furnace is heated by combustion of a solid fuel and wherein an injection gas, which has an oxygen portion of more than 21%, is inject... | 12/06/2011 |
| 7976771 | Method for reducing oxidic slags and dusts and inductively heatable furnance for carrying out this method A method for reducing oxidic slags and dusts possibly loaded with organics uses an inductively heatable coke bed extending in the axial direction and having a temperature gradient. Reaction gas is sucked off in an axial region of the coke bed between two induction b... | 07/12/2011 |
| 7282172 | Vertical shaft melting furnace A vertical shaft melting furnace is operated in a method that includes firing a plurality of burners to generate combustion products, and directing jets of the combustion products into the shaft in a bottom region of the shaft. The method further includes directing ... | 10/16/2007 |
| 7232542 | Preheating cold blast air of a blast furnace for tempering the hot blast temperature An improved blast furnace system for producing molten iron incorporating a preheater to heat the cold blast air used to temper the hot blast temperature is disclosed. The improved blast furnace system comprises a blast furnace, a hot blast main for conveying a suppl... | 06/19/2007 |
| 7209871 | Prediction of cavity size in the packed bed systems using new correlations and mathematical model It has been reported in the literature that raceway measurement made during the decreasing gas velocity is relevant to operating blast furnaces. However, no raceway correlation is available either for decreasing or increasing gas velocity which is developed based on... | 04/24/2007 |
| 6948930 | Furnace head or furnace throat seal A blast furnace head (11) including a material loading device comprising rotary chute (14) driven in rotation about a first, vertical axis of rotation (16), and a loading chute (15) at the outlet of same, driven in rotation about a second... | 09/27/2005 |
| 6945775 | Method and apparatus for heating a slurry to a predetermined temperature The temperature of a metallurgical slurry in a heater vessel is accurately controlled by heating a first portion of the slurry in the heater vessel by contact with a heating medium such as steam, and by adding to the heater vessel controlled portions of a slurry at ... | 09/20/2005 |
| 6944930 | Method for manufacturing low-oxygen copper A method for manufacturing a low-oxygen copper wire is provided, in which a dehydrogenating treatment can be performed without requiring a long moving distance of molten copper, and the generation of holes in solidification is suppressed, whereby high quality low-ox... | 09/20/2005 |
| 6936673 | Anti-bonding methods for blast furnace slag or its grading adjusted slag An anti-bonding agent for blast furnace slag or its grading adjusted slag which includes one or more polymers having a main constituent unit shown by by a greater molar percentage than any other constituent unit where ... | 08/30/2005 |
| 6918760 | Shaft pre-heater A shaft preheater to achieve an improved adaptation of layer height to particle size spectrum of material to be preheated. The shaft preheater includes a plurality of shafts for receiving lumpy material, an arrangement for filling the individual shafts with the lump... | 07/19/2005 |
| 6858061 | Method and device for producing pig iron or liquid steel pre-products from charge materials containing iron ore The invention relates to a process for producing pig iron or liquid primary steel products in a blast furnace, CO2 being substantially removed from at least a partial stream of a top gas emerging from a reduction shaft furnace (1), and this partial... | 02/22/2005 |
| 6857872 | Device for loading a shaft furnace A loading device for a shaft furnace comprises a chute supported by a suspension rotor (28) in a fixed housing. The rotor (28) is fitted with a cooling circuit, supplied with liquid coolant via a rotating annular joint (44). The latter comprises... | 02/22/2005 |
| 6800113 | Equipment for distribution and feeding of charge and fuel in shaft furnaces of rectangular cross section The present invention refers to an equipment for feeding and distributing charge and fuel in furnaces of rectangular cross section, comprising movable feeding tubes to distribute along the longitudinal section and the cross section of the furnace, both a charge comp... | 10/05/2004 |
| 6692688 | Modular furnace A modular apparatus for the production of molten metal by self reduction of agglomerates of metal oxide or of prereduced metal, which may be iron. The apparatus includes a plurality of connected cells of identical size and construction. Each apparatus is ... | 02/17/2004 |
| 6565623 | Method and apparatus for curing self-reducing agglomerates The present invention refers to a method and an equipment for curing and drying self-reducing agglomerates containing cement as a binder in the presence of saturated vapor at a temperature from about 70 to about 110° C. and under atmospheric pressure. Th... | 05/20/2003 |
| 6555049 | Steel manufacturing facility and method A steel manufacturing facility and method are disclosed which utilize ground mobile equipment, as opposed to overhead cranes. At least one material container is loaded with a steel making product and picked up with a transport vehicle that is movable thro... | 04/29/2003 |
| 6544468 | Method for cooling a shaft furnace loading device The invention concerns a method for cooling a shaft furnace loading device, said loading device being equipped with a ring-shaped rotary joint (40), provided with a fixed ring-shaped part (56) and a rotating ring-shaped part (46), for supplying cooling li... | 04/08/2003 |
| 6544470 | Feeding device for electrical shaft furnaces with an electrode-receiving central tube A feeding device for closed shaft furnaces connected to a gas-extracting device, in particular for low shaft furnaces for melting steel scrap, having a transporting device, which leads to the head of the upper furnace vessel and is integrated at least par... | 04/08/2003 |
| 6540958 | Bell and hopper for shaft furnaces In order to configure a bell and hopper for shaft furnaces, in particular, blast furnaces, comprising a charging bin with a feed tube, a rotating chute carrier with rotary drive, a swiveling chute in the interior of the furnace with drive means arranged e... | 04/01/2003 |
| 6511629 | Shaft furnace The invention relates to a shaft furnace, in particular a direct-reduction shaft furnace, with a charge composed of particulate material, in particular a particulate material containing iron oxide and/or sponge iron, the said material being capable of bei... | 01/28/2003 |
| 6426036 | Direct reduction device to obtain metal iron with a high content of carbon in the form of carbide A direct reduction device (10) of the gravitational type to obtain iron carbide starting from iron oxide, comprising a reduction and carburation reactor (12) below which a cooling and passivation container (26) is arranged wherein the iron carbide is suit... | 07/30/2002 |
| 6403022 | Device for the direct reduction of iron oxides Device for the direct reduction of iron oxides of the type with a gravitational load, comprising a reactor defining, in its upper part, at least a zone inside which the reduction reaction occurs, means (14, 15) to introduce the load through a mouth (12) o... | 06/11/2002 |
| 6379421 | Method and apparatus removing undesirable metals from iron-containing materials The present invention relates to a method and apparatus for separating undesired toxic metals, such as Zn, Pb and Cd, from iron-containing materials by: sintering a mixture of such materials (typically including EAF dust and mill scale) with carbonaceous ... | 04/30/2002 |
| 6342179 | Furnace for the direct reduction of iron oxides Gravitational type furnace for the direct reduction of mineral iron comprising a median reaction zone (14) in which the reactions to reduce the mineral iron occur, means (12, 13) to feed the mineral iron to said reaction zone (14), distribution means (16,... | 01/29/2002 |
| 6280181 | Withdrawal device for a shaft furnace The invention relates to a shaft furnace (1), in particular a direct-reduction shaft furnace, having a bed (2) of lumpy material, in particular lumpy material containing iron oxide and/or iron sponge, having worm conveyors (3) which penetrate through the ... | 08/28/2001 |
| 6273933 | Method for blowing fine particles containing metal oxide into a reducing gas According to a process for injecting metal-oxide-containing fine particles into a reducing gas, a central material stream formed by the fine particles and a carrier gas is introduced into the reducing gas and at least one gas stream formed by a secondary ... | 08/14/2001 |
| 6245124 | Vertical shaft furnaces A vertical shaft furnace for melting scrap metal, particularly copper scrap, uses one or more burners operated superstoichiometrically in order to provide excess oxygen to react with a waste gas stream passing up through the copper scrap thereby reducing ... | 06/12/2001 |
| 6230634 | Method of blowing synthetic resin into a furnace A method of blowing a synthetic resin material into a furnace comprising preparing a synthetic resin material having an average specific surface area of at least 50 m2 /kg; and blowing the synthetic resin material from tuyeres of a shaft furnac... | 05/15/2001 |
| 6200522 | Method and apparatus for smelting iron ore Method and apparatus for smelting iron ore in which iron ore is preheated and partly reduced within a first reaction zone and then further reduced in a second reaction zone. The first reaction zone can be a shaft reduction furnace and the second reaction ... | 03/13/2001 |
| 6149859 | Gasification plant for direct reduction reactors The present invention is an integrated process and apparatus for supplying at least a portion of the reducing gas feedstock to a reduction reactor, such as a reactor for the direct reduction of iron, wherein the reducing gas contacts a feed material at a ... | 11/21/2000 |
| 6146442 | Apparatus and method for introducing gas into a shaft furnace without disturbing burden flow An apparatus for the direct reduction of iron oxide utilizing a shaft furnace equipped with a bustle and tuyere system having multiple rows of tuyeres. The bustle and tuyere system utilizes multiple rows of tuyeres to aid in the reduction of gas velocitie... | 11/14/2000 |
| 6126716 | Iron-base scrap preheating apparatus and method In order to preheat pieces of iron scrap of various sizes and shapes highly effectively while avoiding the fusion of the pieces of iron scrap, a rotary kiln type preheating furnace and a shaft type preheating furnace are arranged in parallel with each oth... | 10/03/2000 |
| 6090180 | Cupola emission control system and method A cupola emission control system is provided that includes both improved physical emission control equipment and improved controls for operating such equipment. The physical emission control improvements include an orifice ring of restricted diameter abov... | 07/18/2000 |
| 6086653 | Smelting-reduction apparatus and method for producing molten pig iron using the smelting reduction apparatus A smelting reduction apparatus and a method for producing molten pig iron using the smelting reduction apparatus are disclosed. The molten pig iron is produced by using iron ore, sintered ore or iron pellets, so that the reduced iron discharge operation f... | 07/11/2000 |
| 6030430 | Blast furnace with narrowed top section and method of using Described herein is an Improved Converter System designed to help reduce air, land and water pollution by completely converting materials that presently cause pollution into clean burning fuels and a host of other products beneficial to mankind. The prima... | 02/29/2000 |
| 5997596 | Oxygen-fuel boost reformer process and apparatus A process and apparatus for the production of reformed gases. Natural gas and oxygen are combusted in a first stage to produce carbon dioxide and water. The products of combustion are conveyed to a second stage. Reforming gas and oxygen are injected into ... | 12/07/1999 |
| 5965085 | Apparatus for charging a shaft furnace An apparatus for charging a shaft furnace, in which each of plane faces of a second segment of a guiding member of a unit for distributing a burden over a cross section of the furnace is formed so that its first line of intersection with a first vertical ... | 10/12/1999 |
| 5890889 | Shaft furnace An improved hearth section for a shaft furnace may comprise a plurality of splines mounted to the side wall of the hearth section in spaced-apart circumferential positions so that each of the splines extends radially inward from the side-wall and into the... | 04/06/1999 |
| 5676908 | Plate for cooling shaft furnaces The present invention concerns a plate (1) for cooling a blast furnace and forged or rolled out of a blank of copper or mainly-copper alloy. Vertical bores (3) extend into the plate. A detachable furnace-cooling component (4) with vertical bores (5) and horizo... | 10/14/1997 |
