C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/354
C22B 7/00 (2006.01) C22B 1/00 (2006.01)
Patent
CA 1193446
A B S T R A C T The invention relates to a method for converting metalcontaining waste material having substantial quantities of organic constiuents, 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 and provided with 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°. The reactor vessel is held during this rotation at a temperature which is sufficiently high to expel organic constituents in the form of a combustible gas far as long as such a gas is generated. The combustible gas is com- busted 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.
406279
Leirnes Johan S.
Lundstrom Malkolm S.
Boliden Aktiebolag
Gowling Lafleur Henderson Llp
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