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公开(公告)号：US20230083759A1
公开(公告)日：2023-03-16
申请号：US17760230
申请日：2021-02-10
Applicant: ENGITEC TECHNOLOGIES S.P.A.
Inventor： Massimo Giuseppe MACCAGNI , Edoardo GUERRINI , Andrea GRASSI
Abstract: A method for recovering metal zinc from a solid metallurgical waste containing zinc and manganese, may include: (a) bringing the solid metallurgical waste into contact with an aqueous leaching solution comprising chloride ions and ammonium ions to produce at least one leachate including zinc ions and manganese ions and at least one insoluble solid residue; (b) cementing the leachate, by adding metal zinc as a precipitating agent, to eliminate at least one metal other than zinc and manganese possibly present in the leachate as ions and producing a purified leachate; (c) subjecting the purified leachate to electrolysis in an electrolytic cell including at least one cathode and at least one anode immersed in the purified leachate to deposit metal zinc on the cathode and producing at least one exhausted leachate, and, before the electrolysis, precipitating manganese ions by oxidation with permanganate ions and subsequently separating a precipitate including MnO2.
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公开(公告)号：US20210025026A1
公开(公告)日：2021-01-28
申请号：US16976897
申请日：2019-03-06
Applicant: ENGITEC TECHNOLOGIES S.P.A.
Inventor： Massimo Giuseppe MACCAGNI , Edoardo GUERRINI
Abstract: The present invention concerns a process for the recovery of lead from a lead pastel electrolytically, where the pastel contains lead sulfate. The process provides for the leaching of the non-desulfurised pastel and the subsequent removal of the sulfates by precipitation; the leachate containing the lead ions is then subjected to electrolysis for the recovery of metal lead. The present invention further relates to a process for the recovery of lead accumulator components, wherein the lead contained in the pastel of the accumulators is recovered according to the aforesaid process.
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