Pacific Metals Co., Ltd.

Kosuke Murai

Akira Kimura

Hiromasa Yakushiji

Hirota Amano

Yoshisada Soga

Yoshishige Nagoya

A process for recovering scandium economically with high efficiency by concentration and separation from an oxide ore containing nickel and a small amount of scandium as well as a large amount of iron and/or aluminum comprises the steps of acid leaching the oxide ore under a high-temperature, high-pressure oxidative atmosphere while restraining leaching of the iron and/or aluminum, thereby selectively leaching substantially all nickel and scandium from the ore, recovering the nickel from the resulting leaching solution as a precipitated sulfide while not precipitating the scandium as a sulfide but leaving the total amount thereof in the solution, and then adjusting the pH of the solution with a precipitant to recover the scandium from the solution as a high-concentration scandium hydroxide or carbonate by concentration and separation.

Process for recovering rare earth metal from oxide ore by concentration

A direct method for the production of high-grade, high-purity ferromanganese comprising the steps of charging a molten Mn-containing material, a non-carbonaceous reducing agent and a slagging material in a reaction vessel and subjecting the reaction vessel to horizontal eccentric circular motion to mix and agitate the contents of the vessel, whereby the Mn oxide contained in the molten Mn-containing material is reduced by the non-carbonaceous reducing agent.

Growing community of inventors

Hachinohe, Japan

Kosuke Murai