Metallurgical apparatus – Means for melting or vaporizing metal or treating liquefied... – Continuous refining
Patent
1982-12-21
1984-06-26
Andrews, M. J.
Metallurgical apparatus
Means for melting or vaporizing metal or treating liquefied...
Continuous refining
75 78, 266225, 266229, F27B 312
Patent
active
044562314
ABSTRACT:
An apparatus for continuously refining molten crude lead including a furnace for removal of antimony from the crude lead regardless of whether the crude lead does or does not contain arsenic and/or tin. The furnace is of the reverberatory type having a plurality of transverse walls dividing the interior thereof and thus the lead into a number of distinct but connected compartments with the passageways through the transverse walls being staggered so that molten lead passes along a zigzag or tortuous path through the furnace which is lined with a refractory material. Air is injected into the molten crude lead as it passes from the inlet end of the furnace to the discharge end for progressive softening of the crude lead. The low antimony content slags produced near the lead discharge end of the furnace becomes progressively enriched in antimony as they react with the higher antimony content metal as they pass toward the lead inlet end where they are discharged at a slag overflow device. A solid reducing agent, such as coal, may be added to the surface of the slag or an organic gas capable of reducing lead oxide to lead may be injected into the crude lead or the slag layer to increase its antimony content and reduce the weight of the slag.
REFERENCES:
patent: 2043524 (1936-06-01), Williams
patent: 4294433 (1981-10-01), Vanjukov et al.
Andrews M. J.
Jacobson Harvey B.
Paul Bergsoe & Son a/s
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