Perspective of Sewage Sludge Natural Cold Treatment for Utilization in Cement Production Adjustment of Flame Parameters as Mean of Fuel Economy at Burning Lime - E. O. Tskitishvili; L. N. Trotsenko; V. S. Pikashov; N. V. Matsishin; K. A. Kukuj; K. G. Lejkovskij; T. V. Vinogradova (Energy Technologies and Resource Saving, 2013)