crosslinking oven of a continuous mat of mineral or vegetable fibers

crosslinking oven of a mattress (12) of continuous mineral or vegetable fibers, comprising a plurality of heating chambers (20) crossed successively by said fiber mat (12), said oven being characterized in that at least the one of said casing further comprises, between the casing outer insulation (49) from the oven and the central compartment (40) of said box, an integrated device for heating and hot gas recirculation comprising: - at least one turbine radial (50) horizontally mounted on the upper wall (45) or the bottom wall (46) of the central compartment (40), whose axis of rotation is disposed vertically, said turbine sucking the hot gas through said axis of an outlet (48) of the central compartment gas (40) after passing through the mattress (12), and rejecting the radially recirculating means (51, 52), - recirculation means (51, 52) of the gas warm turbine outlet radia the (50) to an inlet (47) of the gas in the compartment (40), said recirculating means are disposed at least in part on at least one side wall (43, 44) of the compartment, - at least one heating means (53) of the gas flowing in said vessel.