| CPC C04B 18/08 (2013.01) [C04B 20/04 (2013.01); F23G 5/08 (2013.01); C04B 2111/1093 (2013.01); F23G 2209/12 (2013.01); F23G 2209/30 (2013.01)] | 9 Claims |

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1. 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.
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