非鉄製錬スラグの二次資源化に向けた革新的環境対応リサイクルプロセスの開発

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The crystallization behaviors of the magnetite and hematite showing a trade-off relationship. A lower oxygen partial pressure was beneficial to the precipitation of magnetite. In particular, the use of 1 vol% oxygen resulted in a selective oxidation tendency for magnetite precipitation.A new specific mineral liberation technology - High-voltage (HV)　electrical pulses was implemented for an attempt to the liberation of　precipitated magnetite in copper slag, which capable of producing of the high　percentage of the monomineral particles at disintegration of mineral　aggregates.