A method for recovering platinum group metals, includes melting a material to be treated containing platinum group metals, under heating in a furnace, along with a copper source material containing at least one kind of metallic copper and copper oxide, a flux component, and a reducing agent. The molten metal absorbing the platinum group metals is separated from a slag oxide through difference in specific gravity. The molten metal absorbing the platinum group metals is subjected to an oxidation treatment. An oxide layer containing as a major component copper oxide and a molten metal containing as a major component metallic copper containing the platinum group metals concentrated therein are separated through difference in specific gravity. A silver content in the molten metal separated in melting under heating is controlled to 2,000 ppm or more and 8,000 ppm or less, thereby recovering platinum group metals with high efficiency.

A method for extracting and separating Gold, Silver, Copper, Zinc and/or Lead from an Arsenic-containing ore, concentrate or tailings characterized in that the extraction is carried by roasting in the presence of a calcium-containing material and at least one of an alkali metal halide and alkaline metal halide. In the method, Arsenic remains immobilized in the extraction residue.

A method for extracting and separating Gold, Silver, Copper, Zinc and/or Lead from an Arsenic-containing ore, concentrate or tailings characterized in that the extraction is carried by roasting in the presence of a calcium-containing material and at least one of an alkali metal halide and alkaline metal halide. In the method, Arsenic remains immobilized in the extraction residue.

A recovery system for recovering volatile precious metals from a gas phase, particularly for selectively recovering Pt and/or Pd, but not Rh from a gas phase. The recovery system is characterized in that it includes a plurality of woven or knitted metallic silver gauzes stacked on top of each other, or a plurality of layers of a ceramic or glass support coated with metallic silver, or a combination of both. The disclosure further relates to a method for recovering volatile precious metals from a gas phase, a system for the catalytic conversion of ammonia into nitric oxide including a recovery system according to the recovery system of the disclosure, and the use of the system for the catalytic conversion of ammonia into nitric acid, and for the catalytic ammonia into nitric oxide