Alternative Fuel Handling The required energy input causes significant amount of the production cost for the manufacture of cement. Therefore apart from standard combustibles like coal, fuel oil and gas the so called alternative fuels are of considerable interest, besides a useful waste disposal their utilization offers important economic advantages. Next to waste oil, scrap tires, shredded tires, well as shredded wood, synthetic materials, and oil saturated mineral substances are suitable waste or secondary fuels. Possible alternative fuels are available in large quantities and at a favorable price. They can be disposed in the high temperature process of the rotary kiln systems of cement plants without any risk. There is neither a danger of inadmissible environmental pollution like toxic emissions nor a reduction of the quality of the cement. Special technology for the utilization of alternative fuels in the high temperature process of rotary kilns which has proven its viability in a large number of installations supplied to the cement industry. Due to the continuous improvement of this technology using the important experience gained a standard of high quality and reliability could be achieved. Therefore, modern concepts aim at a flexible use with a quick adjustment to the different types of fuels. Thus the user has the advantage of adjusting his energy balance with regard to the costs always to the present market situation.