System and method for recovering desired materials and producing clean aggregate from incinerator ash
OwnerThomas Valerioinventor
Life of this patent
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Abstract
Devices, systems, and methods for separating incinerator combined ash are described. The devices, systems, and methods include a fines process that utilizes water or other liquid in the separation of portions of the incinerator combined ash.
Claims17
A method for separating combined incinerator ash using water comprising:
- sizing the incinerator combined ash using at least one 2-stage screen to recover a first material less than about 2 mm;
- wet screening the first material with a screen, using water slurry, to recover a first group of the combined incinerator ash in the range of about 0.5 mm and about 2 mm and a second group of combined incinerator ash less than about 0.5 mm;
- processing the first group by (a) separating the first group using a first rising current separator operating at about at 2.0 SG into a first heavy fraction and a first light fraction;
- (b) separating the first heavy fraction using a second rising current separator operating at about 3.2 SG into a second heavy fraction portion and a second light fraction, wherein the second light fraction contains sand;
- (c) separating the first light fraction from separator using a third rising current separator or spiral separator operating at about 2.0 SG into a third heavy fraction and third light fraction, wherein the third heavy fraction is conveyed to the second rising current separator for separation;
- (d) magnetically separating the second heavy fraction to recover ferromagnetic metals and paramagnetic metals;
- (e) centrifuging at 3.2 SG the second heavy fraction to recover precious metals and heavy metal concentrate;
- processing the second group by (a) separating the second group using a gravity separator into a first heavy material and first light material, wherein the second light material is removed from the system;
- (b) de-sliming the first heavy material and then using a first oxygen encapsulated separator to recover a precious metals concentrate and a tail portion containing a copper concentrate, (c) processing the tail portion of first oxygen encapsulated separator through a second oxygen encapsulated separator to recover the copper concentrate, wherein the copper concentrate is a smelter grade copper product.
A system for separating incinerator ash materials comprising a size reducer, a 2-stage screen that allows incinerator ash materials of about 50 millimeters (mm) or less to pass through a first screen and allows materials about 2 mm or less to pass through a second screen, a wet screen with water, a hydrocyclone operatively connected to a first oxygen encapsulated separator and a second oxygen encapsulated separator, a first rising current separator operating at about 2.0 SG operatively connected to a second rising current separator operating at about 3.2 SG and a third rising current separator operating at about 2.0 SG, a magnetic separator capable of recovering ferromagnetic metals or paramagnetic metals and operatively connected to the second rising current separator, and a centrifuge separator at 3.2 SG operatively connected to the magnetic separator.
Dependencies are inferred from the claim text.