METHOD FOR MANUFACTURING NICKEL POWDER

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing nickel powder by which particles of >=3μm particle size can be further decreased in a process where Ni(OH)2 is reduced by H2 gas to obtain nickel powder of superior crystallinity. SOLUTION: In the method for manufacturing the nickel powder free from coarse particles, NiCl2 solution is neutralized with NaOH and the resultant Ni(OH)2 is subjected to dry-type reduction at 420-480 deg.C using H2 gas into the nickel powder. In this method, equipment combining a jet mill with a classifier is used, and agglomerated particles are deagglomerated using the jet mill and classification is carried out using the high-speed rotor type classifier in a non- reagglomerated state directly after the deagglomeration.