公开(公告)号：US20200280111A1

公开(公告)日：2020-09-03

申请号：US16499374

申请日：2017-10-17

Applicant: University of Science and Technology Beijing

Inventor： Chengyan WANG ,  Peng XING ,  Yongqiang CHEN

IPC: H01M10/54 ,  C22B3/00 ,  C22B7/00

Abstract: A method for recycling lead from spent lead-acid battery paste, relating to the technical field of hydrometallurgy. In the method, firstly a reducing agent, and a lead paste are added into a zinc chloride solution for leaching in a stirring mill to cause lead in the lead paste to enter the solution, a lead cementation is performed by using zinc in the leached solution, after the lead cementation, the electrolytic zinc is produced by controlling an electrodeposition on the zinc chloride solution for a short time, the reducing agent is zinc, lead or hydrogen peroxide, a part of the electrolytic zinc is returned as the reducing agent for leaching, the step of returning the electrolytic zinc as the reducing agent can be omitted when the lead or the hydrogen peroxide is used as the reducing agent.

公开(公告)号：US20200377971A1

公开(公告)日：2020-12-03

申请号：US16576765

申请日：2019-09-20

Applicant: University of Science and Technology Beijing

Inventor： Chengyan WANG

IPC: C22B3/00

Abstract: A method for preparing lead directly from a lead-containing material by a solid phase reaction, includes: step 1, adding the lead-containing material to be processed to the grinder, and adding a metal substance and water to the grinder, wherein an activity of the metal substance is larger than that of lead; the solid phase reaction between the lead-containing material and the metal substance is caused directly by the grinder through a mechanical force to obtain a reaction product; step 2, washing and filtering the reaction product to obtain the lead and a metal salt solution corresponding to the metal substance; step 3, performing a melt casting on the lead to obtain a crude lead, crystallizing the metal salt solution to obtain a metal salt corresponding to the metal substance.