Zinc recovery method

Zinc recovery method

Provided is a zinc recovery method comprising: an alkali melting step (102) in which a starting material (1) or the like is brought into contact with molten sodium hydroxide (5), (14), which is in a molten state, at a temperature equal to or higher than the melting point of sodium hydroxide, and zin...

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Hauptverfasser: TAMAI YOSHIE, HAIO KENJI, TOMONAGA SAKIKO, MATSUURA HIROYUKI, MOTOBA KAZUHIKO, MORI SHUJI
Format: Patent
Sprache:chi ; eng
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CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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creator TAMAI YOSHIE
HAIO KENJI
TOMONAGA SAKIKO
MATSUURA HIROYUKI
MOTOBA KAZUHIKO
MORI SHUJI
description Provided is a zinc recovery method comprising: an alkali melting step (102) in which a starting material (1) or the like is brought into contact with molten sodium hydroxide (5), (14), which is in a molten state, at a temperature equal to or higher than the melting point of sodium hydroxide, and zinc ferrite contained in the starting material (1) or the like is decomposed into a zinc oxide component and an iron oxide component in the molten sodium hydroxide; and a water dissolution step (103) for obtaining a zinc-containing aqueous solution (8) containing a zinc component by bringing water into contact with the sodium hydroxide, the zinc oxide component, and the iron oxide component at a temperature lower than the boiling point of water, said sodium hydroxide having the reduced temperature of the molten sodium hydroxide, and dissolving the zinc oxide component in the sodium hydroxide aqueous solution. Meanwhile, indissolvable substances (9) which are not dissolved in the sodium hydroxide aqueous solution and
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subjects CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
title Zinc recovery method
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