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Title:
PRODUCTION METHOD FOR LEAD STORAGE BATTERY ACTIVE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2018/088309
Kind Code:
A1
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.

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Inventors:
UEDA HIROMASA
MUKAITANI ICHIROH
KITAMORI SHIGETAKA
HATAKENAKA TOSHIKAZU
Application Number:
PCT/JP2017/039632
Publication Date:
May 17, 2018
Filing Date:
November 01, 2017
Export Citation:
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Assignee:
HITACHI CHEMICAL CO LTD (JP)
International Classes:
H01M4/56; C01G21/10
Foreign References:
JPH10270029A1998-10-09
JPH04292859A1992-10-16
JP2009280462A2009-12-03
JP2009016256A2009-01-22
JPH02262247A1990-10-25
Attorney, Agent or Firm:
NISHIURA Tsuguharu (JP)
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