The invention concerns a method for processing a compacted product, comprising the following steps: - Humidifying the compacted product, then - Drying the humidified compacted product, the humidifying and drying steps being carried out by applying a permanent and continuous air flow towards the compacted product having been previously placed in a processing chamber, the air flow being controlled during processing so as to humidify the compacted product and then to dry the compacted product, the air flow moreover being controlled to place and hold the compacted product in levitation in the processing chamber during the entire processing. The invention also relates to a device designed for implementing this processing method.