Method and apparatus for burning raw materials of cement clinker

Claim 1

IN A METHOD FOR BURNING RAW MATERIAL OF CEMENT CLINKER OF THE TYPE COMPRISING PREHEATING AND CALCINING RAW MATERIALS BY A SUSPENSION PREHEATER PROVIDED WITH A CALCINING DEVICE HAVING A BURNER, BURNING RAW MATERIALS WHICH PASS THROUGH SAID PREHEATER TO FORM CEMENT CLINKER IN A ROTARY KILN, AND COOLING SAID CEMENT CLINKER BY A CLINKER COOLER FROM WHICH THE HEATED AIR OBTAINED BY THE COOLING OF CLINKER IS DIRECTLY INDUCED TO SAID DEVICE AND USED AS ITS COMBUSTION AIR TOGETHER WITH THE EXHAUST GAS FROM SAID ROTARY KILN, THE IMPROVEMENT WHICH COMPRISES MIXING SAID HEATED AIR WITH SAID EXHAUST GAS WHICH CONTAINS DUST, AND CONDENSING VOLATILE MATTERS CONTAINED IN SAID EXHAUST GAS AS GASEOUS PHASE THEREBY ADHERING SAID CONDENSED VOLATILE MATTERS TO SAID DUST, SEPARATING SAID DUST FROM THE MIXTURE OF SAID COMBUSTION AIR AND SAID EXHAUST GAS, SUPPLYING SAID MIXTURE AFTER DUST SEPARATION TO SAID CALCINING DEVICE, THEREBY UTILIZING SAID MIXTURE FOR THE COMBUSTION OF SAID CALCINING BURNERS; AND DISCHARGING AT LEAST A PORTION OF SAID SEPARATED DUST AND VOLATILE MATTERS TO WHICH SAID DUST IS ADHERED.