<報文>含ウラン・トリウム鑛物の分離に關する基礎的研究(第3報) : 閃ウラン鑛の存在状態について

概要

論文の詳細を見る
Examinations were made of the uraniferous ore from the Maeda Pit, Matsuiwa Mine, Miyagi Prefecture, by means of microscopic observation, autoradiography, and differential flotation of sulphide minerals associated with uraninite, and the following results were obtained : (1) Uraninite is usually associated with pyrite. (2) The size of uraninite crystals lies between 6 and 300 microns, that of 20 to 30 microns being most abundant. (3) The shape of uraninite crystals assumed to be the ellipsoid of rotation is mostly 0.53 in the ratio of the apparent minor to major axes. (4) As the uraninite crystals are brittle, it is necessary to consider the recovery of both locked particles of uraninite with pyrite and free uraninite particles. (5) Pyrrhotite is ferromagnetic and can be recovered by magnetic separation before flotation. The pyrrhotite concentrate weighs about 23% of the feed and the distribution of U_3O_8 in it may be kept below 2%. (6) In differential flotation of the magnetic tailing, it is possible to obtain the pyrite concentrate containing over 0.1% U_3O_8 with about 27% recovery of U_3O_8. (7) In treating the 270-mesh oversize of the flotation tailing with a Wilfley table, it is possible to recover about 12% of U_3O_8 in the concentrate containing over 0.1% U_3O_8.
東北大学の論文
1958-02-24