Method for feeding solid material to a mixing device, solid-material feeding device and mixing assembly

A method for feeding solid bulk material that includes powder, to a mixing apparatus with the use of a solid material feeding apparatus, the solid material feeding apparatus having a funnel for receiving the solid bulk material and a solid material outlet which is connected to a solid material inlet of the mixing apparatus, the solid material outlet and the funnel being connected to one another via a conveying connection, the solid bulk material being fed to the mixing apparatus via the conveying connection, the solid material feeding apparatus having a slide which can be moved through the conveying connection between a first end position and a second end position, wherein the slide is set up to detach adhesions of solid bulk material within the conveying connection, and in that the slide is activated and is moved through the conveying connection, in order to clear the conveying connection, as soon as the conveying connection is clogged between the solid material outlet and the funnel, clogging of the conveying connection being detected by a monitoring apparatus, the monitoring apparatus activating the slide at least indirectly, as soon as clogging of the conveying connection is detected, the solid bulk material being conveyed through suction with the aid of a vacuum into a mixing chamber of the mixing apparatus, the vacuum being generated by a rotor/stator unit of the mixing apparatus.