Abstract: Apparatus for feeding finely powdered material from a silo to a device illustratively a burner, in which the material in the silo is fluidized and extracted through a proportioning device, such as a screw or a distributor having alveoles. The material from the proportioning device, which is discharged intermittently, is supplied to a regulating tunnel where it is further fluidized and then discharged to the downstream side of a venturi whose upstream side is supplied with pressurized air. The fluidizing air in the silo and the regulating tunnel are preferably at the same pressure.