A method for directly recovering lead oxide used for the negative electrode of lead-acid batteries from waste lead paste

Title:

A method for directly recovering lead oxide used for the negative electrode of lead-acid batteries from waste lead paste

Document Type and Number:

Japanese Patent JP6363733

Kind Code:

B2

Abstract:

Provided is a method for directly recovering lead oxide used for a lead-acid battery negative electrode from waste lead paste. The method comprises: (1) contacting waste lead paste with a barium-containing desulphurizer under desulphurization reaction conditions, and performing a solid-liquid separation on the mixture after contacting to obtain a filtrate and a filtration residue; and (2) performing a conversion reaction on the above-mentioned filtration residue at a temperature of 350-750°C so as to convert the lead-containing components in the filtration residue into lead oxide. In the method, the direct recovery of a lead oxide raw material applicable to a lead-acid battery negative electrode from waste lead paste is achieved by quantitatively replenishing a barium sulphate additive in the process of desulphuration, thereby substantially decreasing the recovery cost and energy consumption, and improving the comprehensive utilization of waste lead paste.

Inventors:

Bread, Junchin
Ma, Yong Chuan
Sun, Yangji
Kai, Xiaoshan
Niu, Ingen
Ryu, Xiaoway
Song, Suan
Chen, Chissian
Khao, Guo Chin
Shu, Min Min
Yang, Shin Shin
Shu, Ron Louis
Yang, Yunfei

Application Number:

JP2016562052A

Publication Date:

July 25, 2018

Filing Date:

May 27, 2014

Export Citation:

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