Abstract:
Certain embodiments are directed to methods of producing direct reduced iron (DRI), the methods including contacting a target mixture comprising a solid carbonaceous reductant and an unreduced iron material (e.g., Fe 2 O 3 ) with a reducing gas comprising carbon monoxide (CO) under conditions sufficient to produce reduced iron (Fe).
Abstract translation:某些实施方案涉及生产直接还原铁(DRI)的方法,所述方法包括使包含固体碳质还原剂和未还原的铁物质(例如Fe 2 O 3) (Fe 3 O 4)与包含一氧化碳(CO)的还原气体在足以产生还原铁(Fe)的条件下进行反应。 p>
Abstract:
A method for producing direct reduced iron having increased carbon content, comprising: providing a carbon monoxide-rich gas stream; and delivering the carbonmonoxide-rich gas stream to a direct reduction furnace and exposing partially or completely reduced iron oxide to the carbon monoxide-rich gas stream to increase the carbon content of resulting direct reduced iron. The carbon monoxide-rich gas stream is delivered to one or more of a transition zone and a cooling zone of the direct reduction furnace. Optionally, providing the carbon monoxide-rich gas stream comprises initially providing one of a reformed gas stream from a reformer and a syngas stream from a syngas source. Optionally, the carbon monoxide-rich gas stream is derived, at least in part, from a carbon monoxide recovery unit that forms the carbon monoxide-rich gas stream and an effluent gas stream.
Abstract:
A process for producing high-carbon DRI utilizing a syngas comprising hydrogen, carbon monoxide, carbon dioxide and a low content of methane, derived from the gasification of hydrocarbons, such as coal, in a reduction reactor comprising a reduction zone, a lower discharge zone and a transition zone between said reduction zone and said lower discharge zone, wherein a portion of the syngas comprising H 2 , CO and CO 2 is treated in a methane-forming reactor to convert H 2 , CO and CO 2 to CH 4 , whereby a carburizing gas stream containing more than about 20% of CH 4 is produced. The carburizing gas is then introduced to the transition zone and/or to the lower discharge zone of said reactor to increase the carbon content in the DRI, mainly in the form of Fe3C. DRI with carbon content from 2% to 4.5 % may be produced by regulating the composition and flow rate of the carburizing gas.
Abstract:
The invention relates to method of operating a smelt cyclone, wherein the supply of feed material and/or the supply of oxygen containing gas through an array of tuyeres into the smelt cyclone is controlled in order to control accretions of metalliferous feed material at the inside of the smelt cyclone.
Abstract:
Es wird ein Verfahren zur Vergasung von Kohlenstoffträgern und Weiterverarbeitung des produzierten Gases beschrieben. Hierbei werden einem Vergaser Kohlenstoffträger zugeführt und durch Einblasung von Oxidationsmittel werden diese vergast. Das produzierte Gas wird von der Kuppel des Vergasers herausgeleitet, und das heiße Gas wird als Reduktionsmittel bei der Roheisenerzeugung oder nach Kühlung und Reinigung zur Synthesegasherstellung verwendet. Im Vergaser wird aus regenerativen Kohlenstoffträgern, Petrolkoks, Recyclingkunststoff, Altgummi und/oder Kohle unter Zugabe eines Oxidationsmittels ein kohlenmonoxid- und Wasserstoffhaltiges Gas hergestellt. Zum Aufheizen und Anfahren des Vergasers wird ein heißes sauerstoffhaltiges Verbrennungsgas verwendet. Ferner wird eine zugehörige Anlage beschrieben.
Abstract:
In various exemplary embodiments, the present invention provides systems and methods that can convert clean or raw natural gas, clean or dirty coke oven gas, or the like to reducing gas/syngas suitable for direct reduction with minimal processing or cleaning. Hydrocarbons and the like are converted to H 2 and CO. S does not affect the conversion to reducing gas/syngas, but is removed or otherwise cleaned up by the iron bed in the direct reduction shaft furnace. Top gas may be continuously recycled or a once-through approach may be employed.
Abstract:
본 발명의 일 측면에 따른 용철제조장치는 자연상태의 철광석과 철광석 산화 연소로로부터 공급된 산화된 철광석을 장입 및 혼합하고 철광석 환원로에서 공급된 배가스로 철광석을 가열 또는 예비환원시키는 철광석 혼합 및 예비환원로와, 상기 철광석 혼합 및 예비환원로에서 배출된 예비처리된 철광석 또는 부분환원철을 장입하고 용융가스화로에서 배출되는 환원가스에 의해 상기 철광석을 환원시키는 철광석 환원로와, 석탄을 충진하고 상기 철광석 환원로에서 환원된 환원철의 일부를 장입하여 용철과 상기 철광석 환원로에 제공할 환원가스를 생산하는 용융가스화로, 및 새로운 철광석을 장입하고 상기 철광석 환원로에서 배출되는 환원철의 일부를 장입하고 공기와 함께 연소시켜 상기 새로운 철광석을 산소가 많이 포함된 산화된 철광석으로 전환시키는 철광석 산화 연소로를 포함한다.
Abstract:
A two-stage molten bath-based smelting process for producing molten metal from a metalliferous feed material includes (a) preheating metalliferous feed material in a preheater and (b) injecting preheated metalliferous feed material and a solid carbonaceous material into a molten bath of a smelting vessel and smelting metalliferous feed material in the molten bath and forming molten metal and an offgas. The process includes cooling and cleaning the offgas from the smelting vessel and producing a fuel gas. The preheating stage (a) includes preheating the metalliferous feed material by generating heat by combusting at least a part for the fuel gas that is supplied to the preheating stage at a temperature of less than 300º C.
Abstract:
Die Erfindung betrifft ein Verfahren zum Zwischenspeichern von Energie, wobei Eisenerz mit Wasserstoff reduziert wird und das so gewonnene Zwischenprodukt aus reduziertem Eisenerz und gegebenenfalls Begleitstoffen metallurgisch weiterverarbeitet wird, wobei der Wasserstoff durch Elektrolyse von Wasser erzeugt ist, wobei die zur Elektrolyse notwendige elektrische Energie regenerative Energie ist, welche aus Wasserkraft und/oder Windkraft und/oder Fotovoltaik oder anderen regenerativen Energieformen stammt und wobei der Wasserstoff und/oder das Zwischenprodukt unabhängig von der momentanen Nachfrage immer dann erzeugt wird, wenn ausreichend regenerativ erzeugte elektrische Energie vorhanden ist, wobei nicht nachgefragtes Zwischenprodukt bis zur Nachfrage/Verwendung gelagert wird, so dass auch die regenerative Energie, die darin gespeichert ist, gelagert wird und ein Verfahren zum Speichern diskontinuierlich erzeugter Energie wobei die diskontinuierliche erzeugte Energie bei deren Vorhandensein bzw. nach deren Erzeugung einem Prozess zugeführt wird in dem aus einem Ausgangsstoff ein speicherbares Zwischenprodukt erzeugt wird und das speicherbare Zwischenprodukt solange gespeichert wird, bis es zur Herstellung eines Endprodukts benötigt und abgerufen wird.