Abstract
The two kinds of ores from UCHINOTAI ore deposits and each of their main mineral components were oxidized in dried air at temperatures from 200 to 700°C, respectively. The ores were ground under 200 mesh. The oxidation behaviors were observed by means of chemical analysis, X-ray diffraction, and thermobalance.1. The copper rich ore consisted mainly of copper pyrite and pyrite is found to be more oxidizable, and more easily sulphatized than the samples of simple pyrite or simple copper pyrite and behaves in the oxidation as in the case of the mixtures of copper pyrite and pyrite.2. The zinc rich ore consisted mainly of sphalerite, pyrite and minor copper pyrite behaves in the oxidation as in the case of the mixture of their components and the sulphatization of the ore is found to be stimulated by the presence of copper pyrite or pyrite in the ore.
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