Method and device for treating anode slime
AssigneeOutotec Oyj
InventorsOlli Järvinen, Pekka Taskinen, Olli Hyvärinen, Henri Virtanen, Leo Lindroos
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Abstract
The method and furnace according to the invention enable a continuous processing of anode slime and are particularly suited to be connected to a process where anode slime is treated by hydrometallurgic methods after roasting. In the method according to the invention, the slime containing valuable metals and selenium is dried, roasted, sulfatized and cooled. The method includes steps to be carried out in succession, in continuous operation, so that the slime forms a slime layer on the conveyor and is conveyed to be treated in successive drying, roasting, sulfatizing and sulfuric acid removal and cooling units.
Claims11
A method for treating slime containing valuable metals and selenium, in which method the slime is dried, roasted, sulfatized and cooled, wherein the method includes steps to be carried out in succession and in continuous operation, so that the slime is formed as a slime layer on the conveyor and is conveyed to be treated in succession to successive drying, roasting, sulfatizing and sulfuric acid removal and cooling units.
A furnace for treating slime containing valuable metals and selenium in continuous operation, in which furnace the slime is roasted for removing the selenium and for sulfatizing the metals, wherein the furnace comprises a drying block, a roasting block, a sulfatizing and sulfuric acid removal block and a cooling block, arranged in succession, at least one conveyor that is arranged to convey the slime layer through the blocks from the beginning of the drying block to the end of the cooling block, and a slime feeder device, that is arranged to feed anode slime at a suitable speed to the moving conveyor band.
Dependencies are inferred from the claim text.