Hydrometalurgical process and apparatus for recovering metals from waste material
AssigneeElemetal Holding B.V.
InventorsJeroen Pieter Netten, Silvan Johan Thus
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Abstract
The invention is directed to a process and apparatus for recovering metals, in particular for recovering metals from bottom ash from incineration plants, such as municipal waste incineration plants. In accordance with the invention, a feed containing ash is fed to an oxidizing unit, wherein at least part of said metals is oxidized in the presence of one or more acids and at least one oxygen donor, thus producing a stream comprising metal ions. From this stream the metals of interest are selected and converted into metallic form.
Claims14
Process for recovering one or more metallic metals from a waste supply stream containing them, which process comprises:
- feeding said stream to an oxidizing unit, wherein at least part of said metallic metals is oxidized in the presence of one or more acidic substances, at least one oxygen donor and optionally a complexing agent, thus producing a stream comprising metal ions;
- followed by the steps of
- concentrating one or more of said metal ions from said stream comprising them, thus producing a stream of concentrated metal ions;
- reducing at least part of the metal ions from said stream of concentrated metal ions, thus producing said one or more of metals in metallic form.
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Dependencies are inferred from the claim text.