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公开(公告)号：EP4172373A1
公开(公告)日：2023-05-03
申请号：EP21742048.8
申请日：2021-06-28
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12.发明授权DIRECT REDUCTION PROCESS WITH IMPROVED PRODUCT QUALITY AND PROCESS GAS EFFICIENCY 有权直接还原过程，提高产品质量和工艺效率
公开(公告)号：EP2961854B1
公开(公告)日：2017-09-27
申请号：EP14734217.4
申请日：2014-02-27
CPC分类号： C21B13/02 , C21B13/0033 , C21B13/004 , C21B13/0073 , C21B2100/22 , C21B2100/26 , C21B2100/282 , Y02P10/122 , Y02P10/126 , Y02P10/128 , Y02P10/136 , Y02P10/143
摘要： A direct reduction process producing DRI from iron oxide particles by reduction at a about 750° C. with a reducing gas mainly H2 and CO, that also includes CO2, H20, and methane, a the reduction reactor and the top gas effluent from the reduction reaction after cooling/scrubbing is split. The resulting first top gas portion with a first hydrocarbon-containing make-up gas passes through a catalytic reformer yielding an improved hot reducing gas first effluent. The second top gas portion passes through a CO2 removal unit and then with the second hydrocarbon-containing make-up gas passes through a heater yielding a hot CO2-lean recycle reducing gas second effluent. The first and second effluents are fed to the reducing zone of the reduction reactor as the reducing gas reactant. The flow rate of at least the second of the two make-up gases is regulated to control the carbon content of the DRI produced.
摘要翻译： 直接还原过程通过在约750℃下用还原气体主要是H 2和CO（还包含CO 2，H 2 O和甲烷，还原反应器和还原的顶部气体流出物）还原由氧化铁颗粒产生DRI 冷却/洗涤后的反应被分开。 得到的具有第一含烃补充气体的第一顶部气体部分通过催化重整器，产生改进的热还原气体第一流出物。 第二顶部气体部分通过CO 2去除单元，然后与第二含烃补充气体通过加热器产生热的贫CO 2再循环还原气体第二流出物。 将第一和第二流出物作为还原气体反应物供给还原反应器的还原区。 调节两种补充气体中至少第二种的流量以控制所产生的DRI的碳含量。
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13.发明公开DIRECT REDUCTION PROCESS WITH IMPROVED PRODUCT QUALITY AND PROCESS GAS EFFICIENCY 有权DIREKTREDUKTIONSVERFAHREN MIT VERBESSERTERPRODUKTQUALITÄTUND PROZESSGASEFFIZIENZ
公开(公告)号：EP2961854A2
公开(公告)日：2016-01-06
申请号：EP14734217.4
申请日：2014-02-27
CPC分类号： C21B13/02 , C21B13/0033 , C21B13/004 , C21B13/0073 , C21B2100/22 , C21B2100/26 , C21B2100/282 , Y02P10/122 , Y02P10/126 , Y02P10/128 , Y02P10/136 , Y02P10/143
摘要： A direct reduction process producing DRI from iron oxide particles by reduction at a about 750° C. with a reducing gas mainly H2 and CO, that also includes CO2, H20, and methane, a the reduction reactor and the top gas effluent from the reduction reaction after cooling/scrubbing is split. The resulting first top gas portion with a first hydrocarbon-containing make-up gas passes through a catalytic reformer yielding an improved hot reducing gas first effluent. The second top gas portion passes through a CO2 removal unit and then with the second hydrocarbon-containing make-up gas passes through a heater yielding a hot CO2-lean recycle reducing gas second effluent. The first and second effluents are fed to the reducing zone of the reduction reactor as the reducing gas reactant. The flow rate of at least the second of the two make-up gases is regulated to control the carbon content of the DRI produced.
摘要翻译： 一种直接还原方法，通过还原气体主要是还原气体还原CO 2，H 2 O和甲烷在约750℃还原，从氧化铁颗粒生成DRI，还原反应器和来自还原剂的顶部气体流出物 冷却/洗涤后的反应分裂。 所产生的具有第一含烃补充气体的第一顶部气体部分通过催化重整器，产生改进的热还原气体第一流出物。 第二顶部气体部分通过CO 2去除单元，然后与第二含烃补充气体通过加热器，产生热的贫二氧化碳循环还原气体第二流出物。 将第一和第二流出物作为还原气体反应物进料到还原反应器的还原区。 调节至少两种补充气体中的第二种的流量以控制所产生的DRI的碳含量。
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公开(公告)号：EP3762669A1
公开(公告)日：2021-01-13
申请号：EP18715127.9
申请日：2018-03-08
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15.发明公开
公开(公告)号：EP3494238A1
公开(公告)日：2019-06-12
申请号：EP17754105.9
申请日：2017-08-02
发明人： CONDOSTA, Michele , DALLE NOGARE, Daniela , PRIMAVERA, Alessandra , MARTINIS, Alessandro , ZENDEJAS MARTINEZ, Eugenio
IPC分类号： C21B13/00
摘要： A method and apparatus for producing direct reduced iron, said method comprising producing direct reduced iron using a pre-treated make-up gas as a reducing agent in a direct reduced iron reactor (10), and wherein producing direct reduced iron is carried-out using a zero-reformer process in which catalytic reformation of the pre-treated make-up gas is carried-out "in situ" within the direct reduced iron reactor (10) such that the pre-treated make-up gas is subjected to no further catalytic reaction besides the catalytic reactions that occur inside said direct reduced iron reactor (10),characterized in thatsaid method comprises: - pre-treating a stream of said make-up gas containing heavy hydrocarbons by subjecting the stream of make-up gas to a low temperature adiabatic reforming at a temperature comprised between 300°C and 600°C, prior to using said stream of make-up gas as a reducing agent for producing direct reduced iron; - subjecting said pre-treated stream of make-up gas to adjusting humidity content of said stream of make-up gas after said low temperature adiabatic reforming by bypassing said stream of make-up gas to selectively split said stream into a first part (128) of said stream of make-up gas and a second part (130) of said stream of make-up gas and subjecting said first part (128) to a water separation and then mixing said first part (128) to said second part (130) to obtain a reducing stream (146) to be sent to direct reduced iron production.
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