Fly Ash Conference 2024. Woca is an international conference organised every other year by the american coal ash association and the university of. Our members comprise the world’s foremost experts on coal ash (fly ash and bottom ash), and boiler slag, flue gas desulfurization gypsum (fgd or “synthetic” gypsum), and other flue gas materials captured by emissions.

Our members comprise the world’s foremost experts on coal ash (fly ash and bottom ash), and boiler slag, flue gas desulfurization gypsum (fgd or “synthetic” gypsum), and other flue gas materials captured by emissions. The soda ash industry is at the forefront of a global energy paradigm while the market.