Mixing silo for bulk material, production plant with a mixing silo of this type and method for operating a mixing silo of this type

A mixing silo for bulk material comprising a silo container, a mixing installation mounted in the silo container for mixing the bulk material, at least one shut-off element for shutting off the mixing installation, wherein the at least one shut-off element is movable between a closed position, in which a bulk material flow through the mixing installation is prevented and the mixing silo has a flow-through function, and an open position, in which a bulk material flow through the mixing installation is possible and the mixing silo has a mixing function,

• wherein the at least one shut-off element is arranged at least one of at and in the mixing installation, wherein the at least one shut-off element is arranged at the outlet of the mixing installation,
• wherein the mixing silo has a minimum extraction rate of at least 20 t/h for plastic bulk material comprising at least one of powder with an average particle size of between 50 μm and 2000 μm and granulate with an average particle size of 1500 μm to 6000 μm,
• wherein the silo container, with the mixing installation shut off, has a residual cross-sectional area that is limiting to the silo container in such a manner that a mass flow of the bulk material ensures the flow-through function and is greater than or equal to the minimum extraction rate of the mixing silo, wherein the limiting residual cross-sectional area represents a minimum cross-sectional area of the silo container along the flow direction of the bulk material, wherein even when the mixing function of the mixing silo is deactivated due to the mixing installation being shut off by means of the shut-off element, the mass flow through the mixing silo is maintained.