Abstract: A device for the continuous production of a liquid mixture of solids and liquids has a rotation-symmetric space with approximately vertical rotation axis for the formation of a rotational flow. In order to obtain a simple, but reliably operating mixing device that furnishes a predictable mixing result, even if a very intense or considerably weaker stream is to be periodically present, it is proposed to design the rotation-symmetric space as an annular space (13) with an internal overflow edge (14) and to provide a funnel-shaped collecting basin (18) under the overflow edge (14) and to provide the discharge openings of the dosing devices (52, 53) for the substances to be mixed above the overflow edge (14). The liquid mixture is to selectively pass to a mixing vessel (28) or directly to a discharge pump (27) at the outlet of the collecting basin (18).