C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 3/08 (2006.01) C22B 19/00 (2006.01)
Patent
CA 2516411
The invention relates to method for leaching zinc-containing materials in connection with the electrolytic recovery of zinc. According to this method, the feed materials i.e. zinc calcine and zinc sulphide, are leached in three stages, in which he sulphuric acid content of the stages rises in accordance with the direction in which the solids are moving. The solids and solution formed in the leaching stages are routed throughout the process countercurrently in relation to each other.
La présente invention concerne un procédé pour réaliser la lixiviation de matériaux contenant du zinc dans le cadre de la récupération électrolytique de zinc. Selon ce procédé, les matériaux apportés, c'est-à-dire du calcinat de zinc et du sulfure de zinc, sont soumis à une lixiviation en trois étapes, la teneur en acide sulfurique au cours des étapes augmentant en fonction de la direction dans laquelle les solides se déplacent. Les solides et la solution formés au cours des étapes de lixiviation sont acheminés à travers le processus à contre-courant les uns par rapport aux autres.
Jarvinen Aimo
Lahtinen Marko
Takala Heikki
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Outokumpu Technology Oy
Outotec Oyj
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