摘要:
A blast furnace gas discharged from a blast furnace is separated into gases containing various components using two-stage gas separation and refinement apparatuses. First, the blast furnace gas is separated into a gas containing H 2 , N 2 , and an unavoidable impurity gas component, a gas containing N 2 and an unavoidable impurity gas component, a gas containing N 2 , CO, CO 2 , and an unavoidable impurity gas component, and a gas containing CO, CO 2 , and an unavoidable impurity gas component with a gas separation and refinement apparatus of a first stage. Then, of these separated gases, the gas containing CO, CO 2 , and the unavoidable impurity gas component is separated into a gas containing CO and an unavoidable impurity gas component, a gas containing CO 2 and an unavoidable impurity gas component, and a gas containing CO, CO 2 , and an unavoidable impurity gas component with a gas separation and refinement apparatus of a second stage.
摘要:
A blast furnace gas discharged from a blast furnace is separated into gases containing various components using two-stage gas separation and refinement apparatuses. First, the blast furnace gas is separated into a gas containing H 2 , N 2 , and an unavoidable impurity gas component, a gas containing N 2 and an unavoidable impurity gas component, a gas containing N 2 , CO, CO 2 , and an unavoidable impurity gas component, and a gas containing CO, CO 2 , and an unavoidable impurity gas component with a gas separation and refinement apparatus of a first stage. Then, of these separated gases, the gas containing CO, CO 2 , and the unavoidable impurity gas component is separated into a gas containing CO and an unavoidable impurity gas component, a gas containing CO 2 and an unavoidable impurity gas component, and a gas containing CO, CO 2 , and an unavoidable impurity gas component with a gas separation and refinement apparatus of a second stage.
摘要:
A blast furnace where coke is combusted with oxygen, instead of air, and where a top gas comprising CO, CO2, H2, and without excess nitrogen is withdrawn from the upper part of the blast furnace, cleaned of dust, the H2/CO volume ratio adjusted to between 1.5 to 4.0 in a water shift reactor, water and CO2 are removed (increasing its reduction potential), heated to a temperature above 850° C. and fed back to the blast furnace above where iron starts melting (thereby increasing the amount of metallic iron reaching the dead-man zone and decreasing the amount of coke used for reduction). Also carbon deposit problems caused by heating the CO-containing recycled gas are minimized by on-line cleaning of the heater tubes with steam without significantly affecting the reduction potential of the recycled reducing gas.
摘要:
The present invention provides a method for decreasing the temperature of blast-furnace gas temperature peaks, which method is characterized in that the pressure of the blast-furnace gas is being measured continuously, and injection of water into the blast-furnace gas is triggered off when a threshold value for the pressure is exceeded. It also comprises a device for performing the method, with means for measuring the pressure of a blast furnace's blast-furnace gas, and with means for injection of water into the blast furnace's blast-furnace gas, which device is characterized in that it comprises means for triggering off the means for injection of water based on a signal of the means for measuring the pressure.
摘要:
The invention refers to a vertical shaft furnace (100) for a burden (115) moving under the influence of gravitation from the top to the bottom of the shaft furnace, in particular for the production of directly reduced iron, with a hot reduction zone (101) and a cooling zone (103) following the reduction zone (101), in which feed openings for a cooling gas (165) are provided, and with a cooling gas collecting member (160) which is provided in a transition portion between the reduction zone (101) and the cooling zone (103), which is characterized in that the cooling gas collecting member (160) comprises collector arms (181-184) arranged in cross shape, each of which forms a cooling gas off-take (170-173).
摘要:
Die Erfindung betrifft ein Verfahren zum Betreiben eines Kupolofens zum Erzeugen von Gußeisen, bei dem der Ofenschacht des Kupolofens mit einem entsprechenden Einsatz gefüllt ist bzw. ständig nachgefüllt wird, wobei dem Ofenschacht im unteren Bereich Wind, z.B. Luft zugeführt und im oberen Schachtbereich ein mit Staubteilchen angereichtertes Abgas (Gichtgas) abgeführt wird und dieses Abgas und/oder auch ein sonstiges, entsprechendes Abgas aus dem kupolofenbenachbarten Bereich, insbesondere aus der Gießerei, einer Entstaubung unterzogen wird. Erfindungsgemäß werden die bei der Entstaubung gewonnenen Stäube, die ansonsten einer Entsorgung zuzuführen wären, als schlackebildender Stoff über die Windzufuhr oder benachbart dazu in den Kupolofen zurück- bzw. eingeführt.
摘要:
Verfahren zum Entschwefeln des Gichtgases eines mit trockener Gaswirtschaft betriebenen Heißwind-Kupolofens (1), bei dem das warme, ungereinigte Gichtgas in einer dem Ofen unmittelbar nachgeordnete, mit Verbrennungsluft beschickten Brennkammer (16) verbrannt wird, wobei ein pulverförmiges Entschwefelungsmittel (18) in die Brennkammer (16) eingegeben wird.
摘要:
Heiße Kühlgase aus Direcktreduktionsöfen enthalten direkt reduziertes Eisen in feinkörniger Form. Zur Abscheid ung von direkt reduziertem Eisen in weiterverarbietbarer Form werden die hießen Gase in einen Heißzyklon geleitet, der im Heißgaszyklon abgeschiedene Staub in einer gegen die Außenatmosphäre gasdicht abgeschlossenen Austrags vorrichtung durch indirekte Kühlung auf eine Temperatur unterhalb der Zündtemperatur mit der Außenatmosphäre abgekühlt, und der abgekühlte Staub aus der Austragsvor richtung ausgetragen.