Froth flotation is used to remove carbon and enhance the fly ash.
A private company has licensed the patent rights for commercialization to produce enhanced pozzolan fly ash and marketable carbon. The products are dewatered and dried for shipment to respective markets. The flotation plant consists of fly ash raw feed silos, wet conditioning and slurrying system, primary and secondary flotation cells, dewatering equipment, drying equipment, conveying systems, finished product storage silos, and material handling equipment. Normally the liquid portion of this process is a closed loop system. A small amount of make-up water is required to replace water evaporated in the drying process.