A. Ahlstrom Corporation

Hans I Elvander

Rolf E Malmstrom

Method and apparatus for producing matte and/or metal from sulphidic fine-grained ore or ore concentrate. The ore or ore concentrate is smelted in a flame chamber in such a way that at least part of the solid material in the flame chamber melts and flows downward into a smelt bath furnace, on top of which the flame chamber is disposed. Volatile metallic and sulphuric components are conducted upward from the flame chamber to a fluidized bed reactor to be utilized as fluidizing gas, the gases being rapidly cooled down in the fluidized bed.

Method and apparatus for producing matte and/or metal

A method and apparatus for producing, in a reactor, a suitable prereduced product for final reduction from material containing metal oxide. The material is preheated in a fluidized bed by means of hot gases from a subsequent prereduction stage. The hot material is smelted and prereduced in a flame chamber utilizing hot reducing gases from a subsequent final reduction stage. The prereduced material is completely reduced in the final reduction stage.

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Helsingborg, Sweden

Hans I Elvander