Mitsui Minings & Melting Co., Ltd.

Ikuo Nagano

Kozo Saitoh

Hiroshi Tanaka

Akira Kimura

Yoko Onishi

A bubble-dispersing apparatus, which comprises a tank for containing a liquid or a mixture of liquid and solid, a vertical rotary shaft installed in said tank and connected with a power source, a fixing plate installed on the lower part of said rotary shaft and extending perpendicular thereto, stirring blades installed on the bottom face of said fixing plate, plural radially disposed guide blades surrounding the rotation zone of said stirring blades and located practically on the same horizontal level as that of said stirring blades by means of a frame whose top is closed, and a gas supply pipe installed beneath and in confronting relationship to said stirring blades.

Bubble-dispersing apparatus

A flotation method for sulfide ores in which, prior to sulfide ore flotation for effecting a mutual separation of the ore constituents, there is carried out a pre-treatment or conditioning step by applying d-c current to the sulfide ore slurry by means of an electrode in order to depress the floatability of certain of the ore constituents.

Electrical preconditioning in a selective flotation of sulfide ores

In the flotation of oxide ores, a method of flotation characterized by applying d-c current to the oxide ore slurry as a pre-treatment prior to flotation.

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Hino, Japan

Ikuo Nagano