Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1982-07-19
1983-11-15
Andrews, M. J.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 72, 75 83, 134 5, 134 19, 266145, 266205, 266213, 432 13, C22B 700
Patent
active
044153600
ABSTRACT:
The invention relates to a method for converting metal-containing waste material having substantial quantities of organic constituents, such as plastics, rubber, paper and greases, to a product from which metal can readily be recovered. The waste material is introduced into a reactor vessel arranged for rotation about its longitudinal axis, the vessel being provided with a bottom and a common charge and discharge opening, whereafter the reactor vessel is rotated with its axis inclined to the horizontal plane at an angle of less than 90.degree.. The reactor vessel is maintained during this rotation at a temperature which is sufficiently high to expel organic constituents in the form of a combustible gas for as long as such a gas continues to be generated. The combustible gas is combusted continuously at a location external of the reactor vessel, and the residual content of the reactor vessel is taken out in a molten and/or non-molten state. During at least a part of the expulsion process, air or gas containing free oxygen can be supplied to the reactor vessel through a lance in sub-stoichiometric amount.
REFERENCES:
patent: 4010935 (1977-03-01), Stephens
patent: 4201370 (1980-05-01), Evans et al.
Leirnes Johan S.
Lundstrom Malkolm S.
Andrews M. J.
Boliden Aktiebolag
Lewis Jon M.
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