Method of recovering lead from recycable lead-containing raw material

• Main Authors: KHODOV; NIKOLAI V, KUZNETSOV; OLEG K
• Format: Patent
• Language: English
• Published: 04.07.1995
• Edition: 6
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; PRODUCTION AND REFINING OF METALS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF ALLOYS OR NON-FERROUS METALS

A method of recovering lead is proposed, wherein preliminarily crushed recycable raw material composed of spent lead-sulphuric acid storage batteries is subjected to treatment with an alkaline solution, as a result of which metallic lead, taken out of the process, and pulp, to be subjected to mechanical separation, are obtained. As a result of the separation, a lead-containing (as inclusions) polymer material and a suspension, which is a mixture of a sodium sulfate solution having lead oxide particles therein, are obtained. The suspension is separated, as a result of which lead oxides are taken out of the process, while the sodium sulfate solution is subjected to electrochemical treatment, as a result of which sulphuric acid and an alkaline solution are obtained, the alkaline solution being fed for treatment of the lead-containing (as inclusions) polymer material. As a result the amount of lead in the polymer material is reduced and an alkaline solution is obtained comprising sodium sulfate and sodium plumbate and is fed for treatment of the recyclable raw material.