Bottom structure for a smelting furnace

F - Mech Eng,Light,Heat,Weapons – 27 – B

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F27B 3/14 (2006.01) C22B 5/14 (2006.01) C22B 15/00 (2006.01) F27B 3/24 (2006.01) F27D 1/00 (2006.01) F27B 3/12 (2006.01) F27B 3/18 (2006.01) F27D 9/00 (2006.01)

Patent

CA 2418325

The invention relates to a bottom structure of a suspension smelting furnace to be used in a smelting furnace (1), in the reaction space (2) whereof of sulfidic raw material containing metal, such as copper, nickel or lead, is smelted in the presence of an oxygen-bearing gas and slag-forming agent, in order to render the metal in a form that is advantageous for further treatment, and where the created molten phases (5, 6) are settled onto the bottom (3) of the smelting furnace in order to separate the molten phases form each other, when the temperature of the molten phases is within the range 1150 - 1450~ C. According to the invention, the bottom structure includes at least one arched lining layer (7) inclined in the longitudinal direction of the smelting furnace, so that the temperature on the surface (89 that is opposite to the surface that gets into contact with the molten phase is below 800~ C.

La présente invention concerne une structure de fond d'un four de fusion en suspension destinée à être utilisée dans un four de fusion (1), dans l'espace de réaction (2) duquel une matière première sulfurée contenant du métal, tel du cuivre, du nickel ou du plomb, est soumise à la fusion en présence d'un gaz contenant de l'oxygène et un agent de formation de laitier, afin de procurer au métal une forme favorisant un traitement ultérieur, et dans lequel les phases en fusion générées (5, 6) se déposent sur le fond (3) du four de fusion afin de séparer les phases en fusion les une des autres, lorsque la température des phases en fusion est comprise entre 1150 et 1450 ·C. Selon l'invention, la structure de fond comporte au moins une couche de garnissage incurvée (7) inclinée selon une direction longitudinale du four de fusion, de sorte que la température à la surface (8) opposée à la face en contact avec la phase en fusion soit inférieure à 800 ·C.

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