Back to results
US 12,551,901 B2Granted
System and method for recovering metal from ash
OwnerThomas A Valerioinventor
Life of this patent
Estimating the term…
Abstract
A system for recovering of metal and sand from incinerator ash material having an ash clarification assembly, a magnet to remove the ferrous from the heavy material; a sorting assembly, a drying cage or dewatering unit to dry the material; and a separation assembly to remove the aluminum from the material. Methods are included as well.
Claims14
A system for recovering metal and sand from incinerator ash material, comprising:
- an infeed hopper configured to receive the incinerator ash;
- an ash clarification assembly operatively coupled to the infeed hopper, the ash clarification assembly being configured to separate the feed material into a light-ash fraction and a heavy-ash fraction based upon a cut-point specific gravity in a range of 1.0 and 1.2, and isolates the light-ash fraction, which contains unburnt organics;
- a magnet positioned downstream of the ash clarification assembly and configured to remove ferrous materials from the heavy-ash fraction;
- a sorting assembly positioned downstream of the magnetic separator and configured to separate heavy metals from the heavy-ash fraction, wherein the sorting assembly operating at specific gravities between 1.6 and 1.8;
- a dryer;
- and
- a separation assembly positioned downstream of the dryer and configured to remove an aluminum-rich fraction from the dried remaining mineral fraction to yield a cleaned sand product.
4 more elements
A method for recovering metal and sand from an incinerator ash feed material, comprising:
- feeding ash into an infeed hopper;
- separating the feed material into heavy-ash faction and light-ash fraction in a first density-based separator having a specific gravity between 1.0 and 1.2;
- removing ferrous materials from the heavy-ash fraction;
- removing metals from the heavy-ash faction using a second density-based separator operating at between 1.6 and 1.8;
- removing sand from the ash;
- washing the heavy-ash fraction to separate sand fraction;
- drying the sand fraction;
- and
- removing aluminum from the sand fraction, leaving sand as the remaining material.
6 more elements
Dependencies are inferred from the claim text.