Rotary Dryer Design - 911 Metallurgist
2018-6-23 · balance between drier cost and fuel cost. It has been that rotary driers are most economically operated when the total number of transfer units (NTU) range from 1.5 to 2.0. Assuming NTU = 1.5. NTU= ln [ [t g1-t w] [t g2- t w] ] 1.5 = ln [{150- 80} { t g2 – 80}] t g2 = 95.62 ºC
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