4. Two-support furnace
By increasing precalcination to 65% of the total fuel flow, a decarbonation rate of 90-95% was achieved. This made it possible to reduce the length of the furnace's decarbonation zone, where exchange conditions between fumes and material are poor.
In recent years, the L/D ratio (length to diameter) of pre-calcined dry furnaces has, as we have seen §
1
, been reduced from around 14/18 to between...
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Two-support furnace