Method for reduction treatment of electric furnace dust
AssigneeKobe Steel, Ltd.
InventorsHiroshi Sugitatsu, Hiroshi Tamazawa
Life of this patent
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Abstract
The method includes the steps of: adding a carbonaceous material B and a binder C, and optionally water, to electric furnace dust A generated in a steelmaking electric furnace 1, to form a powdery mixture D having a water content of 0.5 to 3 mass %; compacting the powdery mixture D into a raw briquette E; and charging the raw briquette without drying into a rotary hearth furnace 5 and thermally reducing the raw briquette to obtain a reduced iron briquette F and a crude zinc oxide G.
Claims14
A method for reducing an electric furnace dust, comprising:
- mixing at least a carbonaceous material and a binder with an electric furnace dust generated in a steelmaking electric furnace to form a powdery mixture having a water content of 0.5 to 3 mass %;
- compacting the powdery mixture with a briquetting machine at a linear compacting pressure of 44 kN/cm or more to form a raw briquette;
- and
- charging the raw briquette without drying into a rotary hearth furnace and thermally reducing the raw briquette to form a reduced iron briquette and a crude zinc oxide.
A method for performing a reduction treatment of electric furnace dust, comprising:
- adding at least a carbonaceous material and a fibrous binder to electric furnace dust generated in a steelmaking electric furnace, and mixing to form a powdery mixture having a water content of 0.5 to 3 mass %;
- compacting said powdery mixture into a raw briquette with a briquetting machine at a compacting linear pressure of 44 kN/cm or more;
- and
- charging said raw briquette without drying into a rotary hearth furnace and thermally reducing said raw briquette to obtain a reduced iron briquette and a crude zinc oxide.
Dependencies are inferred from the claim text.