dge rotary kiln thermolysis process flow chart. advantages of dge thermolysis systems. continuous process for constant quality all equipment designed for longlife 24h/7d operation (minimum 100,000 hours values) extensive sensors for best quality as can be proved fully automatic control system,manufacture of portland cement process flow chart,nov 30, 2019 the raw materials are fed into the kiln via a multiple-stage suspension pre-heating system. the dry mixture is pre-heated by direct contact with the waste gases in a two or four-stage cyclone system. the gases and raw feed move counter-currently. the raw feed attains a temperature of about 180c and is then directly fed into the rotary kiln.