Process for the recovery of lead arising especially from the act

Details Process for the recovery of lead arising especially from the act Process for the recovery of lead arising especially from the act

1993-09-09

1995-11-14

Hoang, Tu

Industrial electric heating furnaces

Environmental control

Arc furnace

373 2, 373109, 75 1059, 75696, F27D 1700

Patent

active

054673658

ABSTRACT:
An electric furnace (containing an immersed electrode) and a process for the recovery of lead, arising especially from solid residues. Fines, which are a product of physically crushing spent batteries, are melted under not very reducing conditions in the presence of a small amount of carbon. This melting allows separating the crude lead and the lead-rich slag so as to remove sulphur in the form of sulphur dioxide and to optionally recover the crude lead. The lead-rich slag is then reduced with a suitable amount of carbon so as to separate the lead-free slag and the crude lead, which again can recovered.

REFERENCES:
patent: 4030916 (1977-06-01), Liniger
patent: 4135912 (1979-01-01), Matthew et al.
patent: 4168155 (1979-09-01), Cusanelli et al.
patent: 4402491 (1983-09-01), Bergsoe
patent: 4571261 (1986-02-01), Buren et al.
L. M. Fontainas and R. H. Maes, Metallurgie Hoboken-Overpelt Research Department, 2710 Hoboken, Belgium, "A Two-Step Process For Smelting Complex Pb-Cu-Zn Materials," Feb. 24-28, 1980, pp. 375-393.
R. Maes, Metallurgie Hoboken-Overpelt Research Department, 2710 Hoboken, Belgium, "Two-Step Smelting Of Complex Lead-Containing Materials," Metallurgie XXII-4-1982, pp. 211-216.

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