METHOD FOR OBTAINING METALS AND RARE EARTH METALS FROM SCRAP
First Claim
1. A method for obtaining metals, noble metals and rare earth metals from scrap, characterized in that in a countercurrent gasifier having a moving bulk-material bed, which has a reduction zone and an oxidation zone, the scrap and carbon-containing materials are oxidized with oxygen-containing gases in the presence of alkaline substances under overall reductive conditions at a total lambda of less than 1;
- the resultant synthesis gas is drawn off at the top part of the countercurrent gasifier, and the metals, noble metals and rare earth metals are at least partially bound as oxides and/or in elemental form to the alkaline substances, whereupon they are obtained from the process as an enriched mixture by physical separation methods.
1 Assignment
0 Petitions
Accused Products
Abstract
The method is used to obtain metals, noble metals, and rare earth metals from scrap. The aim of the invention is to provide a method that allows an efficient recovery even from electronic scrap. This is achieved in that the scrap and carbon-containing materials (A) are oxidized with oxygen containing gases (11) in the presence of alkaline materials under overall reducing conditions with an overall lambda of <1 in an updraft gasifier (2) with a bulk material moving bed, said gasifier having a reduction zone (13) and an oxidation zone (7). The resulting syngas is drawn at the upper part (16) of the updraft gasifier, and the metals, noble metals, and rare earth metals are bound at least partly to the alkaline materials as oxides and/or in elementary form. Finally, said metals are obtained from the process as an enriched mixture (B) by means of physical separation methods.
-
Citations
23 Claims
-
1. A method for obtaining metals, noble metals and rare earth metals from scrap, characterized in that in a countercurrent gasifier having a moving bulk-material bed, which has a reduction zone and an oxidation zone, the scrap and carbon-containing materials are oxidized with oxygen-containing gases in the presence of alkaline substances under overall reductive conditions at a total lambda of less than 1;
- the resultant synthesis gas is drawn off at the top part of the countercurrent gasifier, and the metals, noble metals and rare earth metals are at least partially bound as oxides and/or in elemental form to the alkaline substances, whereupon they are obtained from the process as an enriched mixture by physical separation methods.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
Specification