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|1. (WO2018088309) PRODUCTION METHOD FOR LEAD STORAGE BATTERY ACTIVE MATERIAL|
|Applicants:||HITACHI CHEMICAL COMPANY,LTD.
|Title:||PRODUCTION METHOD FOR LEAD STORAGE BATTERY ACTIVE MATERIAL|
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.