METHOD FOR RECOVERING PLATINUM GROUP ELEMENT

摘要

A method for recovering platinum group elements, wherein an oxide based raw material accompanying platinum group elements, a copper oxide, a solid carbonaceous reducing agent and a flux are charged into a gastight electric furnace equipped with an electrode for heating materials charged in the furnace by the passage of electric current and a lid for substantially interrupting materials charged in the furnace from the atmosphere of the outside thereof, these materials charged into the furnace are heated by the passage of electric current with the electrode and are molten and reduced, to thereby form a molten metal layer under a molten slag layer and concentrate the platinum group elements in the molten metal, characterized in that all of the oxide based raw material, the copper oxide, the solid carbonaceous reducing agent and the flux are provided in the form of a powder or particles, and these powders and particles are mixed and then the resultant mixture is charged in the electric furnace, and in that the mixture having been heated and molten in the furnace is held at 1200 to 1500°C for 5 hr or more in a settling step and then a molten metal containing platinum group elements is discharged out of a furnace.