Recovery of useful materials from refuse fuel ash
A method is described for treating the bottom ash residue resulting from burning a processed refuse fuel to recover metallic and other useful constituent materials from the ash residue. The method comprises: feeding a stream of the ash residue from a stock source thereof to a magnetic separation operation to remove at least the major part of any ferrous materials therein, the separated ferrous materials being delivered to a ferrous metals collection point; the remaining ash residue being passed through a particle size separation operation to separate same into oversize, midsize and undersize fractions; and delivering the oversize fraction to a tramp collection operation, the undersize fraction to an aggregate collection and the midsize fraction to a milling operation of a type wherein brittle non-ductile material is fragmented to provide further size reduction thereof and any ductile material is deformed without any consequential size reduction thereto beyond a certain measure.
- Assignee:
- Smith and Mahoney, P.C., Albany, NY
- Patent Number(s):
- US 4669397
- OSTI ID:
- 6376699
- Resource Relation:
- Patent File Date: Filed date 21 Aug 1986
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ASHES
RECYCLING
METALS
MATERIALS RECOVERY
REFUSE DERIVED FUELS
COMBUSTION PRODUCTS
BRITTLENESS
DEFORMATION
DUCTILITY
IRON COMPOUNDS
MAGNETIC SEPARATORS
PARTICLE SIZE
PARTICLE SIZE CLASSIFIERS
RESIDUES
WASTE PRODUCT UTILIZATION
CONCENTRATORS
ELEMENTS
EQUIPMENT
FUELS
MANAGEMENT
MECHANICAL PROPERTIES
PROCESSING
RECOVERY
SIZE
TENSILE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
WASTE MANAGEMENT
WASTE PROCESSING
090400* - Solid Waste & Wood Fuels- (-1989)
140504 - Solar Energy Conversion- Biomass Production & Conversion- (-1989)