Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1993-05-26
1995-07-04
Andrews, Melvyn J.
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75432, 204104, C22B 312
Patent
active
054296617
ABSTRACT:
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.
REFERENCES:
patent: 5106466 (1992-04-01), Olper et al.
patent: 5248342 (1993-09-01), Montgomery et al.
Khodov Nikolai V.
Kuznetsov Oleg K.
Andrews Melvyn J.
Nikolai Vladimirovich Khodov
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