METHOD FOR DIRECT REDUCTION IN A FLUIDIZED BED
The invention relates to a method for the direct reduction of oxidic iron carrier particles (2) to a reduction product (9) in a fluidized bed (4) through which a reduction gas (8) containing 30 - 100 mol% hydrogen H2 flows in crossflow. At least 90% by mass of oxidic iron carrier particles (2) intro...
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Format | Patent |
Language | English Spanish |
Published |
30.05.2022
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Abstract | The invention relates to a method for the direct reduction of oxidic iron carrier particles (2) to a reduction product (9) in a fluidized bed (4) through which a reduction gas (8) containing 30 - 100 mol% hydrogen H2 flows in crossflow. At least 90% by mass of oxidic iron carrier particles (2) introduced into the fluidized bed (4) have a particle size of less than or equal to 200 micrometers. The superficial velocity U of the reduction gas (9) flowing through the fluidized bed (4) is set between 0.05 m/s and 1 m/s such that, for the particle size d equal to d30 of the oxidic iron carrier particles (2) introduced into the fluidized bed (4), it is above the theoretical suspension velocity Ut and is less than or equal to Umax.
La invención se refiere a un método para la reducción directa de partículas cargadas con hierro oxídico (2) a un producto de reducción (9) en un lecho fluidizado (4) a través del cual un gas de reducción (8) que contiene 30 - 100 % en moles de hidrógeno H2 fluye en flujo cruzado. Al menos 90% en masa de partículas cargadas con hierro oxídico (2) introducidas en el lecho fluidizado (4) tienen un tamaño de partícula menor que o igual a 200 micrómetros. La velocidad superficial U del gas de reducción (9) que fluye a través del lecho fluidizado (4) se establece entre 0.05 m/s y 1 m/s de manera que, para el tamaño de partícula d igual a d30 de las partículas cargadas con hierro oxídico (2) introducidas en el lecho fluidizado (4), está por arriba de la velocidad de suspensión teórica Ut y es menor que o igual a Umax. |
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AbstractList | The invention relates to a method for the direct reduction of oxidic iron carrier particles (2) to a reduction product (9) in a fluidized bed (4) through which a reduction gas (8) containing 30 - 100 mol% hydrogen H2 flows in crossflow. At least 90% by mass of oxidic iron carrier particles (2) introduced into the fluidized bed (4) have a particle size of less than or equal to 200 micrometers. The superficial velocity U of the reduction gas (9) flowing through the fluidized bed (4) is set between 0.05 m/s and 1 m/s such that, for the particle size d equal to d30 of the oxidic iron carrier particles (2) introduced into the fluidized bed (4), it is above the theoretical suspension velocity Ut and is less than or equal to Umax.
La invención se refiere a un método para la reducción directa de partículas cargadas con hierro oxídico (2) a un producto de reducción (9) en un lecho fluidizado (4) a través del cual un gas de reducción (8) que contiene 30 - 100 % en moles de hidrógeno H2 fluye en flujo cruzado. Al menos 90% en masa de partículas cargadas con hierro oxídico (2) introducidas en el lecho fluidizado (4) tienen un tamaño de partícula menor que o igual a 200 micrómetros. La velocidad superficial U del gas de reducción (9) que fluye a través del lecho fluidizado (4) se establece entre 0.05 m/s y 1 m/s de manera que, para el tamaño de partícula d igual a d30 de las partículas cargadas con hierro oxídico (2) introducidas en el lecho fluidizado (4), está por arriba de la velocidad de suspensión teórica Ut y es menor que o igual a Umax. |
Author | HIEBL Bernhard WURM Johann EISL Roland REIN Norbert OFNER Hanspeter |
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DocumentTitleAlternate | METODO PARA REDUCCION DIRECTA EN UN LECHO FLUIDIZADO. |
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Snippet | The invention relates to a method for the direct reduction of oxidic iron carrier particles (2) to a reduction product (9) in a fluidized bed (4) through which... |
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SubjectTerms | BLASTING CHEMISTRY FURNACES FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL HEATING KILNS LIGHTING MANUFACTURE OF IRON OR STEEL MECHANICAL ENGINEERING METALLURGY METALLURGY OF IRON OPEN SINTERING OR LIKE APPARATUS OVENS RETORTS WEAPONS |
Title | METHOD FOR DIRECT REDUCTION IN A FLUIDIZED BED |
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