METHOD FOR RECOVERING ZINC FROM ELECTRIC-FURNACE STEELMAKING DUST AND DEVICE FOR RECOVERING ZINC FROM ELECTRIC-FURNACE STEELMAKING DUST

摘要

Task A zinc recovery method from an electric furnace steelmaking dust capable of recovering high purity zinc metal in a relatively short time and a zinc recovery apparatus from an electric furnace steelmaking dust are provided. [Solution] Ca mixed heating means 11 is used to mix the electric furnace-making dust and the calcium compound and heat-treated in a non-reducing atmosphere at 960 ° C to 1100 ° C for 1 to 3 hours to obtain ZnO and 2CaO · Fe ₂ O ₃ . The iron powder mixing means 12 mixes the iron powder with the ZnO and 2CaO 占_{2 2} O ₃ and mixes them. The green compact 1 is disposed inside the decompression vessel 21 with the reducing and volatilizing means 13 and the inside of the decompression vessel 21 is decompressed and heated to generate the zinc vapor 2, The steam (2) is cooled and solidified to obtain a solid zinc metal piece (3). The zinc metal piece (3) is dissolved in a multi-component chloride-based flux based on NaCl-KCl by the zinc acquisition means (14) and then cooled to obtain massive zinc.