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1. (WO2018088309) PRODUCTION METHOD FOR LEAD STORAGE BATTERY ACTIVE MATERIAL

Pub. No.:    WO/2018/088309    International Application No.:    PCT/JP2017/039632
Publication Date: Fri May 18 01:59:59 CEST 2018 International Filing Date: Thu Nov 02 00:59:59 CET 2017
IPC: H01M 4/56
C01G 21/10
Applicants: HITACHI CHEMICAL COMPANY,LTD.
日立化成株式会社
Inventors: UEDA Hiromasa
上田 博雅
MUKAITANI Ichiroh
向谷 一郎
KITAMORI Shigetaka
北森 茂孝
HATAKENAKA Toshikazu
畠中 俊和
Title: PRODUCTION METHOD FOR LEAD STORAGE BATTERY ACTIVE MATERIAL
Abstract:
Provided is a production method that enables efficient production of red lead having a high red lead conversion rate. A first heating step is performed to heat a lead powder consisting chiefly of lead monoxide and metallic lead at a first heating temperature so as to oxidize the metallic lead in the lead powder, and then a second heating step is performed to heat, at a second heating temperature, the lead powder heated in the first heating step so as to convert the lead powder into red lead. The lead powder prior to being heated in the first heating step is obtained by crushing metallic lead by a ball-mill method. The first heating temperature is adjusted to be not higher than the second heating temperature.