摘要:
The invention relates to a method for producing liquid metal, in particular liquid pig iron (9) or liquid steel intermediates from metalliferous elements, in particular from partially or totally reduced sponge iron (3) in a melt-down gasifier (1). Carbon-containing material, consisting at least partially of coal fines (16) and coal dust (13), is fed with oxygen or an oxygen-containing gas to a bed (4) formed of said carbon-containing material. The metalliferous elements are melted down, forming a reduction gas, optionally after preliminary final reduction. After drying, the coal fines (16) and coal dust (13) that are to be used are mixed in the warm state with bitumen (20) and then briquetted in the cold state. The briquettes (25) thus produced are introduced to the melt-down gasifier (1) in the cold state and subjected to shock heating (1).
摘要:
The invention relates to a method for producing pig iron. Iron ore is reduced in a reduction shaft (1) for forming sponge iron which is subsequently introduced into the head of a melt-down gasifier (3). The sponge iron is melt open in said gasifier by means of a gasifying means that is also introduced into the head of the melt-down gasifier and an oxygen-containing gas and is melt-down to form liquid pig iron, whereby a reduction gas is produced at the same time. Said reduction gas is discharged from the head of the melt-down gasifier and is supplied to the reduction shaft for reducing the iron oxide. Operation of the melt-down gasifier is controlled in such a way that a reduction gas having a certain composition and being present in a certain amount is produced so that the sponge iron that is introduced into the melt-down gasifier is provided with a high metallisation degree. Operation of the melt-down gasifier is also controlled by introducing iron oxide therein. The metallisation degree of all the iron carriers which are introduced into the melt-down gasifier is reduced in relation to the metallisation degree of the sponge iron and by means of said iron oxide.
摘要:
The invention concerns a method of utilizing dusts which are produced during the reduction of iron ore with a reduction gas and are deposited in the form of slurries in a scrubber. According to the method the slurries are then dewatered and used as starting material for the production of cement.
摘要:
Bei einem Verfahren zur Kühlung und Reinigung von ultrafeine Partikel enthaltendem heißen Gas, wie aus einer Kohlevergasungsanlage, aus einem Einschmelzvergaser erzeugtes Generatorgas oder aus einer Schmelzreduktionsanlage stammendes Gichtgas, in einem Pakkungsvorwäscher und anschließend in einem Ringspaltwäscher, wird in einer dem Packungsvorwäscher vorgeschalteten Sättigungs-Waschstufe das heiße Gas unter weitgehender Nutzung seiner fühlbaren Wärme durch Verdampfung von zugeführtem Heißwasser zumindest annähernd an seine Sättigungsgrenze mit Wasserdampf angereichert und dadurch abgekühlt und die Staubpartikel werden benetzt, wobei in nachfolgenden Kühl- und Waschstufen durch eine schnelle Auskondensation des Wasserdampfs die Staubabscheidung unterstützt wird.
摘要:
In a process for producing liquid pig iron (9) or semifinished steel products from ore reduced into partially and/or totally reduced sponge iron (4) in at least one reduction zone, the sponge iron (4) is molten in a gasification zone (8) of a melting gasifier (1) to which carbon-containing materials (2) and oxygen are supplied, at the same time as a reduction gas is formed. In order to maintain a particular void volume in the bed (13) of solid carbon-containing materials (2) even when finely divided sponge iron (14) is charged, and thus to ensure a good gasification of the bed (13) of solid carbon-containing materials (2), at least the sponge iron (4) is intermittently introduced into the gasification zone (8), forming superimposed layers (14) of sponge iron embedded in the bed (13) of carbon-containing materials (2) and separated by solid carbon-containing materials (2). The sponge iron layers (14) extend over the cross-section of the gasification zone (8), leaving free an area (15) of the cross-section. The reduction gas generated in the gasification zone (8) flows upwards past the sponge iron layers (14), melting the same, through the sections (15) of the cross-section formed by carbon-containing materials (2) and free from sponge iron, gasifying the same.
摘要:
In a process for producing liquid pig iron (9) or semifinished steel products from ore reduced into partially and/or totally reduced sponge iron (4) in at least one reduction zone, the sponge iron (4) is molten in a gasification zone (8) of a melting gasifier (1) to which carbon-containing materials (2) and oxygen are supplied, at the same time as a reduction gas is formed. In order to maintain a particular void volume in the bed (13) of solid carbon-containing materials (2) even when finely divided sponge iron (14) is charged, and thus to ensure a good gasification of the bed (13) of solid carbon-containing materials (2), at least the sponge iron (4) is intermittently introduced into the gasification zone (8), forming superimposed layers (14) of sponge iron embedded in the bed (13) of carbon-containing materials (2) and separated by solid carbon-containing materials (2). The sponge iron layers (14) extend over the cross-section of the gasification zone (8), leaving free an area (15) of the cross-section. The reduction gas generated in the gasification zone (8) flows upwards past the sponge iron layers (14), melting the same, through the sections (15) of the cross-section formed by carbon-containing materials (2) and free from sponge iron, gasifying the same.
摘要:
Es wird ein Verfahren zum Behandeln von Waschwasser aus der Gaswäsche einer Eisenerzreduktionsanlage beschrieben, wobei das Waschwasser in einem Gaswäscher mit dem Rohgas in direkten Kontakt gebracht, aus dem Gaswäscher abgezogen und nach einer Feststoffabscheidung dem Gaswäscher abgekühlt wieder zugeführt wird. Dies wird erfindungsgemäß dadurch erreicht, daß das in einem Eindicker (1) weitgehend von Feststoffen befreite Waschwasser über ein Warmwasserbecken (2) in einen Kühlturm (4) geleitet wird, wo das Wasser gekühlt wird und gleichzeitig eine Abscheidung von gelöstem Kohlendioxid, eine Anreicherung mit Sauerstoff, eine Umwandlung der Calzium- und Magnesiumhydrogenkarbonaten in D.-Karbonate und des Eisenbikarbonats sowie des Eisensulfats in Eisen(III)-hydroxid durchgeführt wird und daß dieses chemisch destabilisierte Waschwasser in einen weiteren in Reihe geschalteten Eindicker (6) durch Zugabe von Flockungs- und Koagulationsmitteln von den restlichen Feststoffen befreit, chemisch stabilisiert und über ein Kaltwasserbecken (7) geleitet wird.