Rotary Kiln Filling Degree & Bed Depth Calculator
Calculate rotary kiln percentage filling (%F), material bed depth, chord length, and cross-sectional solids load for pyroprocessing drums.
Kiln Geometry & Dimensions
Bed Cross-Section & Load
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Frequently Asked Questions
What is the optimal filling degree for a rotary kiln?
For cement clinker and lime kilns, volumetric filling degree (%F) typically ranges between 8% and 15%. Lower filling (<7%) risks overheating refractory lining; higher filling (>18%) impairs heat transfer and causes bed slipping.
Why is chord width important in calcination?
The chord width represents the exposed top surface area of the tumbling bed that directly receives radiative and convective heat transfer from the burner flame and hot combustion gases.
How does refractory thickness change effective internal diameter?
Standard refractory firebricks range from 180 mm to 250 mm in thickness. An outer shell diameter of 4.5 m typically yields an internal working diameter of ~4.0 m to 4.1 m.