| abstract |
The present invention relates to separation of metals in Fe-containing zinc leaching residues, particularly neutral and weakly acidic leaching residues. The method comprises:-producing an agglomerate comprising, in addition to Zn leaching residue, at least 5 wt% carbon and 2-10 wt% S;-said agglomerate in a fixed bed at a temperature above 1250C Fume, thereby producing a reduced Fe-containing phase and Zn-containing fume; and-extracting said Zn-containing fume. The high S content feed allows for relatively high operating temperatures without producing a melt phase. This ensures rapid reduction and humming reaction rates, and allows the use of small technologies such as fixed bed furnaces. [Selection figure] None |