Chilwee Power Co. Ltd & Beijing University of Chemical Technology

Chilwee Power Co. Ltd

Beijing University of Chemical Tehcnology

Mingming Zhou

Jianglin Wang

Tixian Chen

Junqing Pan

Yanzhi Sun

Yinjian Niu

Xiaoxiang Cai

Longrui Zhou

Xinxin Yang

Guoqing Cao

Xiaowei Liu

Yongquan Ma

Shuang Song

Pengfei Zheng

Houxun Li

Mengxin Wu

Xuefeng Yang

Jiaxi Li

Yunfei Yang

Xuan Zhang

Xin Wu

Vehicle

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&#xb0; 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.

Method for directly recovering lead oxide used for a lead-acid battery cathode from waste lead paste

Provided is a method for recycling a lead oxide-containing waste material, comprising: (1) contacting the lead oxide-containing waste material with a desulphurizer under desulphurization reaction conditions, and performing a solid-liquid separation on the mixture after contacting to obtain a filtrate and a filtration residue; (2) performing a conversion reaction on the above-mentioned filtration residue at a temperature of 350-750&#xb0; C. so as to convert the lead-containing components in the filtration residue into lead oxide; (3) contacting the product obtained from step (2) with an alkaline solution so as to dissolve the PbO therein, and then performing a solid-liquid separation to obtain a PbO-alkaline solution; and (4) crystallizing the PbO-alkaline solution from step (3) to obtain PbO crystals and an alkaline filtrate. The method can reduce the energy consumption.

Method for recycling lead oxide-containing waste material

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Changxing, China

Mingming Zhou