Abstract: Provided is a roasting method capable of reducing both C and S components in minerals down to 0.5% or less, respectively, and securing a yield ratio of 90% or more for the Mo component. In a rotary kiln 7, a V, Mo and Ni containing material containing C and S components is subjected to oxidizing roasting to remove the C and S components from the material before reducing the material by means of a reducing agent in order to recover valuable metals composed of V, Mo and Ni. The rotary kiln is equipped with a burner 11 disposed on a material charge side 8a of the roasting furnace 8 to which the material is charged. In the roasting furnace, a direction along which the material moves and a flow of oxygen-containing gas introduced into the roasting furnace 8 are set to be parallel with each other.

Abstract: A reduction treatment apparatus can include a reduction furnace configured to reduce zinc and/or iron oxide through heat treatment of zinc-containing iron oxide or zinc oxide or iron oxide, with a reducing material. The reduction treatment apparatus also has an oxide inlet configured to supply to the reduction furnace the zinc-containing iron oxide or zinc oxide or iron oxide. The reduction treatment apparatus further has a reducing material inlet configured to supply to the reduction furnace the reducing material. The reducing material can comprise at least one of ASR, shredder dust of home electric appliances, waste plastics, refuse derived fuel, refuse paper and plastic fuel, sludge, oil mud, chips of wood, thread debris, rubber debris, and animal and plant residues. The reduction furnace can be configured to use the reducing material as a heating material and reduce the zinc-containing iron oxide or zinc oxide or iron oxide without auxiliary fuel.

Abstract: A reduction treatment apparatus can include a reduction furnace configured to reduce zinc and/or iron oxide thorough heat treatment of zinc-containing iron oxide or zinc oxide or iron oxide, with a reducing material. The reduction treatment apparatus also has an oxide inlet configured to supply to the reduction furnace the zinc-containing iron oxide or zinc oxide or iron oxide. The reduction treatment apparatus further has a reducing material inlet configured to supply to the reduction furnace the reducing material. The reducing material can comprise at least one of ASR, shredder dust of home electric appliances, waste plastics, PDF, RPF, sludge, oil mud, chips of wood, thread debris, rubber debris, and animal and plant residues. The reduction furnace can be configured to use the reducing material as a heating material and reduce the zinc-containing iron oxide or zinc-oxide or iron oxide without auxiliary fuel.

Abstract: Provided is a roasting method capable of reducing both C and S components in minerals down to 0.5% or less, respectively, and securing a yield ratio of 90% or more for the Mo component. In a rotary kiln 7, a V, Mo and Ni containing material containing C and S components is subjected to oxidizing roasting to remove the C and S components from the material before reducing the material by means of a reducing agent in order to recover valuable metals composed of V, Mo and Ni. The rotary kiln is equipped with a burner 11 disposed on a material charge side 8a of the roasting furnace 8 to which the material is charged. In the roasting furnace, a direction along which the material moves and a flow of oxygen-containing gas introduced into the roasting furnace 8 are set to be parallel with each other.