Method for processing metallic waste

Details Method for processing metallic waste Method for processing metallic waste

1995-07-24

1998-04-07

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75624, 75638, 75665, 75669, 75670, 75690, 75694, 429 49, C22B 700

Patent

active

057359334

ABSTRACT:
A processing method by which metals may be recovered at a high purity from metal-containing waste materials.
The method for processing metal-containing waste materials comprises crushing a metal-containing waste material to a particle size of 1-50 mesh, separating and recovering the metal-containing particles from the crushed portion, introducing the metal-containing particles into a vacuum heating furnace, pre-heating the furnace while under suction evacuation, and then raising the temperature of the furnace in stages while continuing the vacuum suctioning, recovering the metal and non-metal vapor produced at each temperature level using a condensing and adsorbing means, and recovering the liquated metals as melts. The method may be used to process waste batteries, copper-containing waste materials and the like in the same manner to recover high-purity metals.

REFERENCES:
patent: 4091825 (1978-05-01), Baker
patent: 4227922 (1980-10-01), Laws et al.
patent: 4401463 (1983-08-01), Melin et al.
patent: 5205857 (1993-04-01), Yokoyama
patent: 5350438 (1994-09-01), Jidosha et al.
patent: 5437705 (1995-08-01), DeLisle et al.
Patent Abstracts of Japan vol. 17, No. 492 (C-1107) JP-A-05 125457 (Ogihara) 21 May 1993.

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