Abstract: A method for utilizing landfill-prohibited solid hazardous waste material as an energy source in a cement kiln is provided. The method comprises obtaining landfill-prohibited solid hazardous waste materials suitable for use in a cement kiln, combining the solid waste materials with a liquid fuel in a milling apparatus to form a mixture, grinding the mixture in the milling apparatus in a manner reducing the particulate size of the solid hazardous waste material to form a fuel slurry, and delivering the fuel slurry directly into the flame of the cement kiln. The grinding of the solid hazardous waste material in the milling apparatus prior to its introduction into the kiln provides for a rapid and instantaneous ignition of the solid hazardous waste materials thereby not adversely affecting the forming clinker or the operating parameters of the kiln.