| abstract |
The present application is an oxide-based raw material, copper oxide, solid carbonaceous reducing material and flux with platinum group elements in a sealed electric furnace having an electrode for energizing and heating the furnace input material and a lid for substantially blocking the furnace input from the outside atmosphere. To a method of recovering platinum group elements comprising conducting and heating these furnace inputs by energizing the furnace with the electrode to form a molten metal layer below the molten slag layer to concentrate the platinum group elements in the molten metal. It is about. At this time, the oxide-based raw material, copper oxide, solid carbonaceous reducing material and flux are all prepared in the form of powdery matter, and these powdery matters are mixed in advance and then charged into the electric furnace. In addition, after the heat melting of the in-furnace charge is carried out at a temperature of 1200 to 1500 ° C. for at least 5 hours, the molten metal containing the platinum group element is discharged to the outside of the furnace. |