Method and arrangement for producing coated prills or granules and prills obtained therefrom and use

摘要

The invention relates to a method for producing at least one biodegradable polymer layer (1.3, 1.5), in particular PLA layer coated prills (1), in particular fertilizer prills, wherein the at least one degradable polymer layer on a support material (1.1 ) of the respective prill, wherein the prills (1) are first coated in a drum coating coating step with at least a first degradable layer (1.3) on the carrier material (1.1), in particular in a drum coater (13) at a relatively low pressure, and then in a fluidized-coating step with at least one second degradable layer (1.5) are coated over the first layer, in particular in a fluidized bed coater (15) at a relative overpressure. Furthermore, the invention relates to an arrangement for producing coated prills and prills obtained therewith.