Device for the hot treatment of granular products, of the gravel or aggregate type, comprising: - an enclosure that is substantially cylindrical in shape overall, defining a longitudinal axis (X-X'), the enclosure being provided, in the vicinity of one of the two ends thereof, with a main inlet for introducing granular products inside the enclosure, and being provided, in the vicinity of the other end, with an outlet for extracting the granular products out of said enclosure, said granular products being intended to undergo treatment while travelling inside said enclosure from the main inlet as far as the outlet in a travel direction, - a heating means that is situated inside said enclosure and is designed to generate a drying flow oriented in the opposite direction to the direction of travel, and passing through a drying section of the enclosure, the drying flow being able to contribute to the drying of said granular products in the drying section, - a main discharger of volatile emanations produced inside the enclosure, the main discharger being connected to said enclosure by a first branch, and being designed to discharge out of the enclosure a main flow of emanations, - a diverted discharger that is connected on the one hand to said enclosure by a second branch at the drying section, upstream of the first branch in terms of the drying flow in order to take off a diverted flow of emanations inside said enclosure, the diverted discharger being moreover connected to said main discharger in order to transmit the diverted flow to said main discharger, said diverted discharger being provided with a means for adjusting the flow rate of the diverted flow, the treatment device being characterised in that it comprises a system for regulating the temperature of the main flow designed to act on the means for adjusting in order to increase or reduce the flow rate of the diverted flow according to the temperature of the main flow. - an enclosure that is substantially cylindrical in shape overall, defining a longitudinal axis (X-X'), the enclosure being provided, in the vicinity of one of the two ends thereof, with a main inlet for introducing granular products inside the enclosure, and being provided, in the vicinity of the other end, with an outlet for extracting the granular products out of said enclosure, said granular products being intended to undergo treatment while travelling inside said enclosure from the main inlet as far as the outlet in a travel direction, - a heating means that is situated inside said enclosure and is designed to generate a drying flow oriented in the opposite direction to the direction of travel, and passing through a drying section of the enclosure, the drying flow being able to contribute to the drying of said granular products in the drying section, - a main discharger of volatile emanations produced inside the enclosure, the main discharger being connected to said enclosure by a first branch, and being designed to discharge out of the enclosure a main flow of emanations, - a diverted discharger that is connected on the one hand to said enclosure by a second branch at the drying section, upstream of the first branch in terms of the drying flow in order to take off a diverted flow of emanations inside said enclosure, the diverted discharger being moreover connected to said main discharger in order to transmit the diverted flow to said main discharger, said diverted discharger being provided with a means for adjusting the flow rate of the diverted flow,