Outotec (finland) Oy

Outotec Oyj

Metso Outotec Finland Oy

Jussi Liipo

Maija-Leena Metsarinta

Maija-Leena Metsärinta

Satu Jyrkönen

Madeleine Scheidema

Pekka Kurki

Satu Jyrkonen

Marcus Runkel

A process of treating complex sulfide concentrate includes the steps of roasting wet or slurried complex sulfide concentrate in a furnace at a temperature of at least 720&#xb0; C. to obtain a calcine; smelting the calcine under inert or oxygen free atmosphere in a smelting furnace to obtain a matte, and optionally granulating the matte to obtain a granulated matte.

Treatment of complex sulfide concentrate

A method for processing slags containing iron and non-ferrous metals, to produce clean slag free of detrimental substances and non-ferrous metals and suitable for use as a raw material or construction material. Slag is reduced in a reduction furnace with the help of reducing agents so that at least 5% of the iron of the slag is reduced into metal. Some of the non-ferrous metals, such as zinc, lead, arsenic and cadmium, vaporize. The contents of the reduction furnace are continuously mixed to prevent separation of a metallic phase from the slag. The generated slag-metal mixture is tapped off from the reduction furnace, cooled, crushed and ground to a finer size. Finally, a metal fraction is separated from a clean slag.

Method for processing slags of non-ferrous metallurgy

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Ulvila, Finland

Jussi Liipo