Apparatus for manufacturing molten irons

C - Chemistry – Metallurgy – 21 – B

Patent

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C21B 13/00 (2006.01) B01J 8/24 (2006.01)

Patent

CA 2635545

An apparatus for manufacturing molten iron according to an exemplary embodiment of the present invention includes i) at least one fluidized-bed reduction reactor that reduces and plasticizes iron ore and converts the iron ore into reduced materials, ii) a melter-gasifier into which the reduced ore is charged and oxygen is injected, the melter-gasifier manufacturing molten iron, and iii) a reducing gas supply line that supplies a reducing gas discharged from the melter-gasifier to the fluidized-bed reduction reactor. The fluidized-bed reduction reactor includes a cyclone that is installed in the fluidized-bed reduction reactor to collect fine iron ore. A gas injector, which prevents the fine ore from adhering by injecting gas containing carbon, is connected to the cyclone.

Un mode de réalisation de la présente invention donné à titre d'exemple concerne un appareil destiné à produire une fonte liquide et comprenant (i) au moins un réacteur de réduction à lit fluidisé qui réduit et plastifie un minerai de fer et qui convertit le minerai de fer en matières réduites, (ii) un dispositif de fusion-gazéification dans lequel le minerai réduit est chargé et de l'oxygène injecté, ce dispositif de fusion-gazéification permettant de produire une fonte liquide, et (iii) une ligne d'alimentation en gaz de réduction acheminant un gaz de réduction évacué à partir du dispositif de fusion-gazéification vers le réacteur de réduction à lit fluidisé. Le réacteur de réduction à lit fluidisé comprend un cyclone installé dans ledit réacteur et destiné à collecter le minerai de fer fin. Un injecteur de gaz, qui empêche le minerai fin de coller par injection d'un gaz contenant du carbone, est raccordé au cyclone.

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