By vacuum pyrolysis recovery of vehicle shredder residue.

摘要

Metals are recovered from automobile shredder residue by subjecting the shredder residue to vacuum pyrolysis to produce non-condensable gases, condensable hydrocarbon vapors and water vapor, and a solid residue containing non-oxidized metals and a carbonaceous material. The vacuum pyrolysis is carried out at a temperature in the range of about 450 DEG to about 650 DEG C., under a subatmospheric pressure in the range of about 50 to about 200 mm Hg so as to thermally decompose and substantially completely vaporize organic matter adhered to the metals. At least one metal is separated from the solid residue, the metal being recovered in nonoxidized and substantially carbon-free form suitable for direct recycling.