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WO/1999/041561A2 |
The invention relates to a charging device for low blast furnaces, especially for arc furnaces used for producing scrap iron, which can be closed by a cover connected to a gas discharging unit and over which a charging device can be plac...
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WO/1999/031450A2 |
A raining bed heat exchanger includes: a hollow stack (10); a feed inlet (15) located near the top of the stack for introducing particulate material into the stack so that the material falls through the stack; a gas inlet (18) located ne...
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WO/1999/029914A1 |
Disclosed is a feeding device for closed shaft furnaces that are attached to a gas extracting device, more particularly low shaft furnaces for melting steel scraps, with a conveyor device leading to the head of the upper tank of the furn...
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WO/1999/028513A1 |
The invention relates to a novel preheating device and a method for preheating an iron scrap mixture before delivering the scrap iron into a metallurgical furnace. The invention primarily makes use of heat which is recovered from hot was...
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WO/1999/016914A1 |
When iron ore is reduced by repeating a series of operations including feeding a raw material consisting of the iron ore and a solid reducing material to a movable hearth furnace having a hearth moving in one direction, placing the raw m...
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WO/1999/016728A1 |
The invention relates to a device for preheating charge materials (2) for a metal smelting assembly (4), comprising a feed shaft (6) for receiving the charge materials, said feed shaft having a feed opening (8) in its top area and openin...
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WO/1998/055417A1 |
The invention relates to the production of cement clinker from powdered and fine-grained raw material using a cyclone preheater, a precalcination arrangement, a kiln and a cooler. In order that fine dust filtered out of the exhaust gases...
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WO/1998/053106A1 |
Loading system for electric arc furnaces (11) including at least a roof (11a) including at least a 'fourth hole' which can be connected to a conduit to discharge the fumes (22) associated at the end with an air-tight cover (23) to tempor...
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WO/1998/046956A1 |
System to load pre-heated scrap by means of baskets for electric arc furnace, the furnace including a movable roof (28), at least one basket (15) loaded with scrap being arranged in a lateral position near the furnace, the basket (15) be...
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WO/1998/046955A2 |
The invention relates to a device for charging a charging material preheater (4) with a top charging orifice (6) in an arc furnace. The inventive device has a charging material container (8) which can be positioned above the charging ori...
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WO/1998/042880A1 |
Basket to manipulate scrap in cooperation with an arc furnace (11) and with means to pre-heat the scrap by means of the fumes from the fourth hole (14), the basket being able to be associated with a movable covering system (16) and inclu...
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WO/1998/043032A1 |
Method to load scrap for electric arc furnace including at least a roof (13) associated with movable moving means (17) cooperating with second movable moving means (24), the roof (13) including at least a hole (15) to discharge the fumes...
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WO/1998/035196A1 |
A metal melting apparatus comprises a metal melting furnace (10) for melting a metal stock with flames from an oxygen burner (11), which uses an oxygen as a support gas, and an oxygen supply equipment for supplying to the oxygen burner (...
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WO/1998/008984A1 |
According to the inventive method for reprocessing waste, including tailings from household garbage, industrial waste, bulky refuse or sewage sludge, said waste and sludge are preprocessed in the lower-oxygen atmosphere of a pyrolyse (1)...
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WO/1998/008041A1 |
This invention concerns a smelting installation with an electric-arc furnace in which the roof of the oven vessel is constructed out of two units (7, 8) which are separated by an aperture (38) and can be moved independently of one anothe...
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WO/1998/007889A1 |
A batch preheater (4) has a charging shaft (14) carried by a supporting structure (64) and batch retaining fingers associated to the bottom end of the charging shaft. According to the invention, the batch preheater (4) comprises a frame ...
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WO/1998/004749A1 |
A metal reduction and melting process which involves the heating of a burden comprising a metal containing component and a carbon containing component in a channel type induction furnace in order to reduce such metal containing component...
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WO/1997/032174A1 |
The invention relates to a method for heat treatment of fine calcium carbonate bearing material comprising preheating fine material containing a coarse and a fine fraction. The preheated material is delivered into a fluidized bed (20) ca...
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WO/1997/030320A1 |
In order to preheat iron-base scrap comprising iron pieces of wide ranges of size and shapes at a high efficiency so that these pieces are not fused to one another, a rotary kiln type preheating furnace and a shaft furnace type preheatin...
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WO/1997/006394A1 |
A metal fusion furnace capable of controlling speeds, at which a metallic material is charged from a preheating section to a fusing section, within an optimum range, and efficiently fusing the metallic material only with oxygen burners, ...
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WO/1996/032505A1 |
In order to profitably process various iron ores having different compositions, a plant for producing iron smelts (24), in particular steel smelts, such as crude steel smelts, has an electric arc furnace vessel (1) and a refiner vessel (...
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WO/1996/032616A1 |
The equipment reliability of a raw material retaining gate of a preheater is improved, the equipment cost is reduced, the effect of preheating the raw material by use of the waste gas is enhanced, and the melting electric power energy is...
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WO/1996/030709A1 |
An apparatus for highly efficiently preheating and melting scrap, which comprises a scrap melting furnace having arc heating means or a top-blowing lance, and a device for introducing an exhaust gas generated from the scrap melting furna...
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WO/1996/022397A1 |
An apparatus and method for reclaiming metal chips formed while machining metal castings to their finished shape. The apparatus includes a stationary charging tube (100) extending in a generally perpendicular direction from the charge we...
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WO/1995/012690A1 |
A furnace preheat installation (10) uses furnace off-gas to preheat material to be charged into the furnace (18). It consists of two angularly-spaced preheat vessels (12, 14) being mounted on a turret (16), adjacent to the furnace (18). ...
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WO/1995/009336A1 |
This invention is provided with a furnace body (1) having an electrode (3) and adapted to melt scrap with arc heat, an air blow port (20) from which air is blown into the furnace body (1) via an air control valve (19), a carbon blow rate...
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WO/1995/004910A1 |
In a charge preheater for a metallurgical melting plant with a shaft (5) having blocking members (7, 8) pivotable by an adjuster (6) which contain fingers (9, 10) in mutually parallel and spaced array, the fingers (9, 10) of a blocking m...
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WO/1994/024503A1 |
This invention is provided with a furnace body (2) having a bottom electrode (1) at a lower portion thereof, a furnace cover (3) provided so as to close an upper portion of the furnace body (2), a raw material inlet port (25) formed in t...
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WO/1994/024506A1 |
This apparatus is provided with a throat (38) which has at one end thereof a raw material inlet port (37) connected to a furnace body (2), and which extends in the diagonally upward direction, a heat exchanger (39) formed on the upper si...
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WO/1994/009332A1 |
In a scrap conveyor (2) for feeding a scrap to a processing furnace (1) such as an arc furnace, etc., while pre-heating the scrap by an exhaust gas from the processing furnace, the periphery of the scrap conveyor is covered with a gas se...
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WO/1994/009163A1 |
The invention concerns a method for continuously melting down scrap metal, in particular bales of scrap metal containing residual plastic materials, the scrap being fed to a melt-down reactor (1) and the heat necessary to melt the scrap ...
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WO/1994/004329A1 |
The process involves blowing in the drying air so as to make it flow only through perforations (10i) of brick blocks (10) without substantially affecting the outer lateral surfaces of the blocks themselves. This process is carried out th...
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WO/1993/000450A1 |
Apparatus for heat processing scrap materials, particularly for de-contaminating aluminium can scrap, as shown in the single drawing, has a rotary kiln (10) defining a furnace chamber (12) along which the material is fed; with hot gas ci...
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WO/1992/010594A1 |
Facility for producing steel by melting scrap comprises an electric furnace (2'), means for supplying individual batches of scrap for charging one at a time into the furnace, and a preheating chamber (4) for preheating each batch of scra...
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WO/1991/018120A1 |
A smelting plant is disclosed with two adjacent, alternatively operated smelting furnaces (1/1, 1/2). The furnace gases produced during smelting are introduced into the other smelting furnace in order to pre-heat its charge. A shaft (12/...
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WO/1991/013841A1 |
A plant for drying sanitary appliances and moulds thereof, comprising a workbench (1) on which the various pieces to be dried are placed, characterized by comprising on said bench a retractable tunnel (11) formed with a double wall (18, ...
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WO/1991/010749A1 |
A method and apparatus for preheating scrap to high temperature by means of hot furnace exhaust gases, with or without the assistance of additional fuel burners prior to being charged into a melting furnace. The scrap preheating station ...
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WO/1991/000251A1 |
A method and apparatus for heat treatment of lime mud comprises drying of the lime mud to be introduced into the lime reburning kiln (5) in a pneumatic dryer (3) by means of flue gases discharged from the lime reburning kiln in order to ...
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WO/1990/010604A1 |
An apparatus and method are disclosed for processing glass-making materials under oxidizing conditions, and for processing materials, such as hazardous or toxic wastes, or smelting under reducing conditions. As a glass-making apparatus t...
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WO/1990/010086A2 |
In a melting aggregate comprising an arc furnace (1) and a preheating shaft (2) for charging materials which is arranged beside the furnace, the outer walls of the preheating shaft are formed, in the lower part, by the wall (5) of the ve...
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WO/1990/006481A2 |
Furnace for melting down scrap iron and similar ferrous materials comprising a tiltable vessel (1') with a refractory-lined hearth and at least partially water-cooled side walls, a removable cover (19'), at least one electrode (17'), and...
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WO/1990/002915A1 |
A process and arrangement are useful for reducing salt cycles, in particular in cement kilns. A partial gas stream loaded with noxious substances is removed from the kiln through a bypass (8). Dust is removed from the partial gas stream ...
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WO/1989/008810A1 |
A method and an installation for recovering energy in the thermal destruction of pollutants in a gas emitted from a scrap preheating device (6, 8), e.g. in an electro-steel furnace (1). The polluted gas is conducted through regenerative ...
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WO/1989/008812A1 |
This invention relates to a container for materials, preferably scrap iron for steel production and intended to be placed on a stand in a preheating station in order that the scrap iron shall be heated up to a high temperature, and compr...
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WO/1988/007896A1 |
A system for the disposal of vessels and the recovery of the scrap materials obtained therefrom. The system comprises a furnace (2) adjacent to or near a sea-land interphase, an access from the sea to the furnace via a dry or wet dock (1...
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WO/1988/004397A1 |
The scrap that is to be charged into an electric arc furnace (11) is preheated by a gas in a closed circuit (21, 20, 23, 22, 17) and this gas is heated in a heat exchanger (17) by the exhaust fumes from the furnace. A minor part of the c...
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WO/1988/002093A1 |
Several components relating to a heating apparatus which preferably are used in conjunction with each other in an apparatus for heating solid granular or particulate material, such as aggregate used to make asphalt concrete. One componen...
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WO/1987/006331A1 |
Method and device for pre-heating waste metal for furnaces, flue gases generated in a furnace (1) being supplied simultaneously or sequentially to two pre-heating places (3, 4) with waste metal containers (14), said flue gases being made...
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WO/1987/004729A1 |
High-temperature dirty gas from an electric furnace (1) is directly introduced into scrap preheaters (5a, 5b, 5c), where scrap (6) to be charged into an electric steel-making furnace is preheated. If some portion of heat generated in the...
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WO/1986/003783A1 |
In order to be able to heat the charging material (3) of a charging material preheater (1) in a more uniform fashion and to higher temperatures, while enjoying short flow paths, the charging material preheater (1) is in the form of a con...
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