Method and installation for conveying fine-grained solids

The present invention relates to a process for the conveyance of fine-grained solids in a reactor with a fluidized bed and a corresponding plant. It is proposed to introduce a first gas or gas mixture from below through a central tube (3) into a mixing chamber (7) of the reactor (1), wherein the central tube (3) at least partially fluidized by a by supplying fluidizing gas, stationary annular fluidized bed (10 ) is surrounded. The gas velocities of the first gas or gas mixture and of the fluidizing gas for the annular fluidized bed (10) are adjusted such that the Particle-Froude numbers in the central tube (3) between 1 and 100, in the annular fluidized bed (10) 0.02 to 2 and in the mixing chamber (7) be between 0.3 and 30th