A process for the preparation of fertilizer granules; fertilizer granules

The invention relates to a process for the preparation of fertilizer granules, in which a suspension of at least one phosphate-containing secondary raw material and at least one mineral acid is generated in the formed suspension, the difficultly soluble phosphates of at least one phosphate-containing secondary raw material at least partially dissolved and / or in a water and / or neutral-ammoniumcitratlosliche phosphate phase are converted and this suspension is subsequently fed to a granulation, forming the fertilizer granules, and wherein the P contained