Patent ID: 6132488
Filing Date: 2000-10-17
Classification: C22B,Y02P,Y10S

Abstract:
A treating method of recovering zinc in the metal state from a waste containing the zinc in the oxide state, lead, chlorine, fluorine, and water, comprising:a mixing process of mixing the waste and a reducing material together to obtain a to-be-treated mixed material;a chlorine recovery process of recovering the chlorine and the water by heating the to-be-treated mixed material;a lead recovery process of recovering the fluorine and the lead by heating the to-be-treated mixed material under a vacuum state;a zinc recovery process of reducing and vaporizing the zinc to recover metallic zinc by heating the to-be-treated mixed material at a temperature higher than that set in the lead recovery process, with the vacuum state maintained; anda residue recovery process of recovering a residue of the to-be-treated mixed material.