METHOD FOR COLLECTING METALLIC Ni AND/OR Co

摘要

PROBLEM TO BE SOLVED: To provide a method for inexpensively and continuously collecting metallic Ni and/or Co with high productivity.

SOLUTION: This collecting method comprises the steps of: forming a reducing atmosphere by burning a fuel with an oxygen burner in such a condition that a ratio of oxygen to fuel is smaller than a stoichiometric ratio; supplying a raw powder 10 containing a Ni and/or Co compound into the flame to selectively reduce the Ni and/or Co compound in the flame and deposit fine particles of metallic Ni and/or Co in the powder 10; subsequently melting and agglomerating them by the heat of the flame to isolate them from surrounding oxides and form independent metallic particles 14; subsequently cooling the powder 10 after having been treated in the flame to solidify the molten metal of Ni and/or Co into grains in the powder 10; and then separating the grains from other substances in the powder 10 to collect them.

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