C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 3/08 (2006.01)
Patent
CA 2440858
The invention relates to a method for the leaching of oxidized ores and in particular zinc ores. The ore, wherein the valuable metals are at least partially in silicate form, are routed to an acidic leaching stage in conditions where the silicate decomposes and the valuable metal ion comes into the solution. During leaching the silicate ion first dissolves, but simultaneously decomposes and is precipitated as silica.
L'invention concerne un procédé de lixiviation de minerais oxydés, et en particulier de minerais de zinc. Le minerai, dans lequel se trouvent les métaux précieux, au moins partiellement sous forme de silicate, est acheminé vers une cuve de lixiviation, dans des conditions telles que le silicate se décompose et que l'ion de métal précieux passe dans la solution. Pendant la lixiviation, l'ion silicate se dissout d'abord, mais se décompose simultanément, et est précipité sous forme de silice.
Fugleberg Sigmund
Pekkala Pertti
Riekkola-Vanhanen Marja
Talonen Panu
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Outokumpu Oyj
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