Water washing with CO2 bubbling as pretreatment of melting furnace fly ash for recovery of rare metals

鄭 昌煥; 大迫 政浩

doi:10.14912/jswmepac.18.0.343.0

Proceedings of the Annual Conference of The Japan Society of Waste Management Experts

The 18th Annual Conference of The Japan Society of Waste Management Experts

Session ID : P1-F3-3

DOI https://doi.org/10.14912/jswmepac.18.0.343.0

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Host: The Japan Society of Waste Management Experts

Water washing with CO2 bubbling as pretreatment of melting furnace fly ash for recovery of rare metals

*CHANG-HWAN JUNG, MASAHIRO OSAKO

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Keywords: water washing, CO2 bubbling, rare metals, melting furnace fly ash (MFA)

CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract

Water washing with CO2 bubbling as pretreatment of Melting furnace fly ash (MFA) for recovery of rare metals was investigated. CO2 bubbling which was applied to control pH during water washing decreased the leachg of Pb, Zn, and Cd remarkably. In addition, bubbling process was found to be an effective way to increase the removal rate of chlorine from MFA. Target rare metal elements including Cu, Pb, and Zn were about four times concentrated by water washing.

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