Process for reducing the electric steelworks dusts and facility for implementing it
AssigneeEcochem Aktiengesellschaft
InventorGianni Zoppi
Life of this patent
Estimating the term…
Abstract
A process for processing electric steelworks dusts containing oxidized high-iron, zinc-bearing materials in order to recover iron and zinc from [them] said dusts. The process includes the steps of: feeding the dusts to an induction furnace partially filled with a charge of metal or alloy to be smelted, wherein the charge is present as a molten bath that is made turbulent by induced currents; contacting the dusts with a surface of the turbulent molten bath inside the furnace; and reducing zinc and iron oxides contained in the dusts inside the furnace, while oxidizing zinc and carbon monoxide rising from the bath.
Claims11
A method for processing electric steelworks dusts containing oxidized high-iron, zinc-bearing materials to reduce iron and zinc from said dusts, comprising:
- feeding said dusts to a reduction section of a coreless induction furnace, wherein said reduction section is partially filled with a charge of metal or alloy in the form of a molten bath made turbulent by induced currents;
- wherein said dusts contact a surface of said turbulent molten bath inside said furnace to reduce zinc and iron oxides contained in said dusts;
- forming vapors containing zinc from said bath that rise above said bath;
- oxidizing the zinc in said vapors.
A method for processing electric steelworks dusts containing oxidized high-iron, zinc-bearing materials to reduce iron and zinc from said dusts, comprising:
- feeding said dusts to a reduction section of a coreless induction furnace, wherein said reduction section is partially filled with a charge of metal or alloy in the form of a molten bath made turbulent by induced currents;
- wherein said dusts contact a surface of said turbulent molten bath inside said furnace to reduce zinc and iron oxides contained in said dusts;
- forming vapors containing zinc from said bath that rise above said bath;
- oxidizing the zinc in said vapors in an oxidation zone of the furnace, wherein the zinc in said vapors is oxidized by iron oxides.
Dependencies are inferred from the claim text.