Methods and systems for controlling carbon burn out
AssigneeEm Resources LLC
InventorsRafic Y. Minkara, Joseph W. Cochran
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Abstract
Systems and methods for beneficiating a recovered fly ash material and/or recovering fly ash from an impound site are described. The method may include thermally treating a first portion of a recovered fly ash material to form a thermally treated fly ash having a first temperature of at least 1000° F., and contacting the thermally treated fly ash with a second portion of the recovered fly ash material to cool the thermally treated fly ash to a second temperature of less than or equal to 500° F. and form a fly ash product. The fly ash product may have a carbon content less than 8% by weight, based on the total dry weight of the fly ash product.
Claims9
A system for forming a fly ash-containing product, the system comprising:
- a first stage configured for thermally treating a first portion of a fly ash-containing mixture to form a thermally treated mixture;
- and
- a second stage configured for cooling the thermally treated mixture utilizing a second portion of the fly ash-containing mixture to form the fly ash-containing product, wherein the fly ash-containing product is of lower carbon content than the fly ash-containing mixture, based on a total dry weight of the fly ash-containing product;
- wherein the system is configured to first separate the fly ash-containing mixture into the first portion and the second portion upstream of the first stage.
Dependencies are inferred from the claim text.