FromClinker CoolerClinker Temp.1400oCReduces100 .. 200oCTo

Cooler Thermal Efficiency:Notation:A = Heat content of clinker leaving the kiln Heat losses of clinker cooler B = B consists of = Heat loss in cooler exit air Heat loss in clinker leaving cooler a = Heat loss by radiation b = c =

Items influence the efficiencyThe clinker must be brought in an intensive contact with the cooling airThe quantity of available cooling air affects the efficiencyThe efficiency is not only determined by the machine itself, but also by the amount of cooling air.The granulometry of the clinker affects the cooling efficiency

Rough guideline for the Heat BalanceHeat input by clinker1200oC100%Heat outputBy secondary air750oC68%By shell losses22%By clinker outlet170oC10%

Types of coolerGrate CoolerRotary CoolerPlanetary Cooler

Set of tube fixed to the kiln, therefore no separate drive requiredInternal heat transfer equipment (lifters)Planetary CoolerNo waste airCapacities of up to 5000 t/d maximum, preferably up to 3500 t/dNot suitable for AS pre-calcining systems

Planetary Cooler Internals

Temperature Profile of Planetary cooler

Planetary Cooler

Rotary Cooler

Separate tube with separate driveInternal heat transfer equipment (lifters)Rotary CoolerNo waste airCapacities of up to 4500 t/d maximum, preferably up to 2000 t/d

Design of Rotary CoolerDiameter of the cooler is similar to that of a corresponding suspension preheater kiln.Rotating speed is in the same range as for the kiln (max. 3 rpm)The length to diameter is approximately 10The inclination is comparatively high in the order of 5%

Internals of Rotary Coolers

Cooling Performance

Specific LoadWhere :P = Clinker production in t/24 h Number of coolers tubes N = L = Length of cooler tubes in m Cooler tube diameter in m D =

To avoid dust circulation< 70 t/m2

*