Zinc production method
AssigneeKinotech Solar Energy Corporation
InventorsMasaaki IOSAKI, Shuji MORI
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Abstract
A zinc production method includes a reaction step such as a leaching step (101) of bringing electric arc furnace dust (1) containing zinc oxide or the like into contact with a chlorine gas (8) to obtain a zinc oxide component in the electric arc furnace dust (1) or the like as crude zinc chloride (3), a purification step (102) of heating the crude zinc chloride (3) obtained at the reaction step to produce zinc chloride vapor, and cooling and condensing the zinc chloride vapor, thereby obtaining purified zinc chloride (6), and an electrolysis step (103) of electrolyzing the purified zinc chloride (6) obtained at the purification step (102) in a molten state to obtain a zinc melt (9) and the chlorine gas (8).
Claims20
A zinc production method comprising:
- a reaction step of obtaining crude zinc chloride from a zinc oxide component in electric arc furnace dust containing zinc oxide or in secondary dust generated at a time of reducing the electric arc furnace dust in a reduction furnace;
- a purification step of heating the crude zinc chloride obtained at the reaction step to produce zinc chloride vapor, and cooling and condensing the zinc chloride vapor, thereby obtaining purified zinc chloride;
- and
- an electrolysis step of electrolyzing the purified zinc chloride obtained at the purification step in a molten state to obtain a zinc melt and a chlorine gas.
Dependencies are inferred from the claim text.