A process and device are disclosed for precipitating
solid compounds from the liquid
zinc or liquid
zinc-based alloys of a
metal bath. According to the disclosed process, partial amounts of the
metal phase containing the compound(s) are exposed to an acceleration higher than the acceleration due to gravity and at least partially dissociated thereby into fractions containing heavier and / or lighter components. The molten
mass depleted of
solid compounds is returned to the
metal bath and the part of the molten
mass enriched with the desired compounds is discharged. The disclosed device is substantially characterized in that a hollow rotary body (2) is introduced into the molten
mass (1). The hollow rotary body (2) can be driven about an axis and is fitted in the submerged or lower area with conveyor means (21) which project into the cavity. In its
discharge or upper area, the hollow rotary body (2) is provided with at least one
discharge opening (23) for the depleted molten mass (14) eccentrically arranged in its wall and with at least one further
discharge opening (25) for the
liquid metal enriched with the desired compounds centrally arranged and / or eccentrically arranged on the discharge side. At least one of the upper molten
mass discharge openings (23, 24) in the rotary body (2) opens into a discharge area of a housing (3) which at least partially surrounds the rotary body (2).