摘要:
Ironmaking method and installation with recirculation of exhaust gas as a reduction gas and whereby part of the exhaust gas is purged upstream and/or downstream of a CO/CO 2 separation unit, said purged exhaust gas being subjected to a water gas shift reaction for H 2 generation.
摘要翻译:炼铁方法和通过废气再循环作为还原气体并且由此部分排气在CO / CO 2分离单元的上游和/或下游被清除的装置,所述排出的废气经受水煤气变换反应H 2代。
摘要:
Step (A1) for separating and collecting CO 2 and/or CO from mixed gas containing CO 2 and/or CO, Step (A2) for adding hydrogen to CO 2 and/or CO separated and collected in Step (A1) and converting CO 2 and/or CO into CH 4 , Step (A3) for separating and removing H 2 O from gas obtained after Step (A2), and Step (A4) for blowing gas obtained after Step (A3) into a blast furnace are included. Since CO 2 and/or CO is separated and collected from the mixed gas and converted (reformed) into CH 4 , and CH 4 is blown into the blast furnace to function as a heat source and a reducing agent, it is possible to implement blast furnace operations effectively using CO 2 and/or CO at low cost and to reduce the amount of CO 2 generated.
摘要:
Disclosed are a method and a plant for reducing particulate iron oxide-containing material, in which the iron oxide-containing material is at least partially reduced in a reduction zone using reduction gas, and the waste gas produced during the reduction process is withdrawn and then subjected to a CO 2 purification process in a CO 2 separation device (1), a CO 2 -containing tail gas being separated in said process. The tail gas is combusted and then dehydrated in a dehydrator (5), wherein the obtained substitute gas is used to replace inert gas.
摘要:
An integrated system for blast furnace iron making and power production based upon higher levels of oxygen enrichment in the blast gas is disclosed. The integrated system leads to; 1) enhanced productivity in the blast furnace, 2) more efficient power production, and 3) the potential to more economically capture and sequester carbon dioxide. Oxygen enhances the ability of coal to function as a source of iron reductant and to be gasified within the blast furnace thereby generating an improved fuel-containing top gas.
摘要:
The present invention proposes a method for operating a blast furnace (12) comprising the steps of recovering top gas from the blast furnace (12); submitting at least a portion of the top gas to a recycling process; and feeding the recycled top gas back into the blast furnace (12). According to an important aspect of the invention, the recycling process comprises feeding the recovered top gas to a reformer unit (40); feeding volatile carbon containing material (42) to the reformer unit (40); proceeding to flash gasification of the volatile carbon containing material in the reformer unit (40), at a temperature between 1100 and 1300°C, and thereby producing devolatised carbonaceous material and synthesis gas; and allowing the devolatised carbonaceous material and synthesis gas to react with the recovered top gas. The invention also proposes a blast furnace installation (1) with a blast furnace (12) and a top gas recycling installation (14) for carrying out the above method.
摘要:
A method for separating a blast furnace gas includes the steps of: producing oxygen-enriched air having an oxygen concentration of at least 25 vol%, blowing the oxygen-enriched air into a blast furnace through a tuyere provided in a lower part of the blast furnace, and generating a reformed blast furnace gas by separating and removing carbon dioxide and nitrogen in a blast furnace gas discharged from a blast furnace top.
摘要:
The present invention proposes a device (10) for regulating the temperature of a gas in a hot gas main for feeding hot gas to a blast furnace. Such a device (10) comprises a mixing pot (14) with a first mixing chamber (16) and a second mixing chamber (18), the first and second mixing chambers (16, 18) being in fluid communication with each other by means of a Venturi-type restriction (20). The first mixing chamber (16) is provided with a first inlet port (22) for feeding hot gas into the first mixing chamber (16), a second inlet port (26) for feeding cold gas into the first mixing chamber (16) and a third inlet port (56) for feeding cold gas into the second mixing chamber (18). The first mixing chamber (16) is further provided with a first outlet port (42) for feeding a first stream of mixed gas from the first mixing chamber (16) to a first gas distribution system (46), while the second mixing chamber (18) is provided with a second outlet port (60) for feeding a second stream of mixed gas from the second mixing chamber (18) to a second gas distribution system (64). The first stream of mixed gas has a temperature different from a temperature of the second stream of mixed gas.
摘要:
Procédé de conduite d'un haut fourneau, dans lequel on injecte simultanément du charbon pulvérisé et un comburant très riche en oxygène au niveau des tuyères principales du haut fourneau, et du gaz réducteur chaud au niveau de la zone de réserve. Le gaz réducteur chaud est produit à partir d'un gaz de récupération, en particulier à partir de gaz de gueulard, notamment en mélangeant ce gaz de gueulard avec du gaz de four à coke; il est injecté à une température comprise entre 850 et 1200°C.