METHOD FOR PRODUCING NICKEL POWDER

• Main Authors: YUKINOBU MASAYA, TANAKA HIROYUKI, MURAKAMI SHINGO
• Format: Patent
• Language: English; Japanese
• Published: 22.04.2021
• Subjects: CASTING; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; WORKING METALLIC POWDER

To provide a method for producing nickel powder through a wet process, capable of stably producing nickel powder with smaller particle size distribution and a uniform average particle diameter regardless of a manufacturing unit.SOLUTION: A method for producing nickel powder at least includes steps of: a solution mixing and feeding step of continuously mixing a solution (A) containing at least water-soluble nickel salt and water, and a solution (B) at least including a reductant and an alkali hydroxide outside a reaction vessel to obtain a reaction solution and feeding the reaction solution to the reaction vessel; and a crystallization step of obtaining nickel crystallization powder through a reductive reaction in the reaction solution fed to the reaction vessel in the solution mixing and feeding step.SELECTED DRAWING: Figure 3 【課題】製造単位に依らず、平均粒子径が一定で、粒度分布が小さいニッケル粉末を安定して製造することができる、湿式法によるニッケル粉末の製造方法を提供する。【解決手段】少なくとも水溶性ニッケル塩と水を含む溶液（Ａ）と、少なくとも還元剤と水酸化アルカリを含む溶液（Ｂ）を、反応容器外で連続的に混合して反応液とし、該反応液を、前記反応容器に送液する混合・送液工程と、前記混合・送液工程で前記反応容器に送液された前記反応液中において、還元反応によりニッケル晶析粉を得る晶析工程と、の各工程を有する、ニッケル粉末の製造方法。【選択図】図３