<報文>硫化鐵鑛の流體焙焼

概要

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Many domestic pyrite concentrates contain small amounts of copper, cobalt and zinc. Owing to the inability to maintain proper temperature and atmosphere by the past furnacing equipment, selective sulfatizing of the individual components in these ores has hardly been realized in actual practice. In the past few years a new type of equipment, the fluidized-bed roaster, has become available. It has revived interest in selective sulfatizing because of the ease with which the roasting conditions in the furnace can be uniformed. This paper describes the results of experiments carried out by the fluidized-bed reactor which has the capacity of 5 kg ore per day, and shows that it is useful in treating copper, cobalt and zinc bearing pyrite to produce water soluble sulfates of these metals while retaining most of iron in insoluble oxide form. The theoretical considerations on the gas composition and its distribution in the furnace, the reacting temperature and the holdup time of the solids in the furnace are also discussed.
東北大学の論文
1956-07-31