Keywords: Hazardous waste, Mixing Air, waste fuel, scrap tires, Long Kilns, PH/PC kilns, Preheater, Precalciner, NOx reduction, Alternate fuel, Waste-derived fuel, Cadence, SNCR, Mixing Technologies, Mid Kiln, tire recycling, cement kiln, Ash Grove, NOx, Low Nox, CO, SO2