A silo, or bin, for flowable materials, especially heavy particulate solid materials. The bin has a bottom wall with a cylindrical wall upstanding therefrom. The bottom wall has a radial discharge opening formed therein and a rotor positioned above the bottom wall sweeps material into the opening. The bin has a guiding body on the axis which tapers in the downward direction and mounted inside the bin side wall are brake members which incline downwardly toward the axis of the bin and are preferably within the axial range of the guiding body.