Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1984-04-30
1985-04-23
Andrews, M. J.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 77, C22B 1302
Patent
active
045127980
ABSTRACT:
The invention relates to a method for producing lead from moist lead-sulphide concentrates and oxidic and/or sulphatic lead raw materials by the known roasting and reaction process. According to the method granules or pellets of oxidic and/or sulphatic lead raw materials are brought together with the moist lead concentrate in a drum-like vessel arranged for rotation about its longitudinal axis. Said moist concentrate is dried while rotating said drum-like vessel to form sulphide-containing granulates. The formed granulates are introduced into a furnace together with flux in given proportions. The charge is vigorously agitated and turbulence created in the resultant melt, while effecting the roasting and reaction process to form a liquid slag and a molten lead phase.
Both the drying and the smelting may be provided in the same unit if a top-blown rotary converter is employed.
REFERENCES:
patent: 2116679 (1938-05-01), Gohre
patent: 2984562 (1961-05-01), Kohlmeyer
patent: 3663207 (1972-05-01), Themelis et al.
patent: 4008075 (1977-02-01), Petersson
Buren Kurt J. A.
Hedlund Martin L.
Leirnes Johan S.
Lundstrom Malkolm S.
Andrews M. J.
Boliden Aktiebolag
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