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蛋白石が硫黄制炼にお よぼす影响について - J-Stage
短 報 蛋 白石が硫黄製錬にお よぼす影響について 村 岡 誠* On the Effect of Opal Exerting upon Sulphur Refining By Makoto MURAOKA (Abstract) Opal, as well-known, is a amorphous mineral that contains from 3 to 10 per cent combined water, and its molecular formula is given by SiO2¥nH2O. The writer, to ascertain the effect of opal on sulphur refining, made differential thermal analysis of opaline clay collected from the Matsuo Sulphur mine with an electric furnace that was adjusted to rise 10•Ž per minute. The results of the differential thermal analysis indicate that discharge of adsorbed water from the opaline clay is completed at 150•Ž. And endothermic peak between 400•Ž and 530•Ž , is caused by decomposition of marcasite and pyrite which accompany the clay. If the temperature of the retort is raised higher than 530•Ž, sulphur is naturally separated from both marcasite and pyrite. But the recovery
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