A process for the production of a lime fertilizer, comprising (a) providing an aqueous lime slurry comprising calcium chloride, (b) depleting salts in said lime slurry comprising calcium chloride so as to obtain a salt-depleted lime slurry, (c) adding lime powder and lime pieces to the salt-depleted lime slurry to obtain a wet mass and optionally adding water, wherein the lime powder has a particle size distribution characterized by a d 50 value of from 0.01 mm to 0.05 mm, and the lime pieces have a particle size distribution characterized by a d 50 value of from 0.2 to 5 mm, (d) mixing and granulating the wet mass to obtain a wet granule, and (e) drying the wet granule to obtain a dry granule with a moisture content of from 1 to 10 wt.-% and with a particle size distribution characterized by a d 50 value of from 1 to 3 mm, and wherein said lime slurry provided in step (a) comprises distiller waste resulting from the ammonia regeneration step in a process for producing soda ash according to the Solvay process, and the lime slurry is made of solid matter suspended in an aqueous solution, and said solid matter comprises: - at least 1 and at most 70 wt.% lime expressed as Ca 2, - at least 5 and at most 60 wt.% calcium carbonate expressed as CaCO 3, - at least 1 and at most 40 wt.% calcium sulfate expressed as CaSO 4, - at most 15 wt.% magnesium hydroxide expressed as Mg 2, - at most 40 wt.%, preferably at most 30 wt.% or at most 20 wt.% of other minerals comprising silica, such as: silica, clays, iron silicate, aluminum silicate, or ettringite, and mixtures thereof, and so that the sum of above solids components is 100 wt.%. (a) providing an aqueous lime slurry comprising calcium chloride, (b) depleting salts in said lime slurry comprising calcium chloride so as to obtain a salt-depleted lime slurry, (c) adding lime powder and lime pieces to the salt-depleted lime slurry to obtain a wet mass and optionally adding water, wherein the lime powder has a particle size distribution characterized by a d 50 value of from 0.01 mm to 0.05 mm, and the lime pieces have a particle size distribution characterized by a d 50 value of from 0.2 to 5 mm, (d) mixing and granulating the wet mass to obtain a wet granule, and (e) drying the wet granule to obtain a dry granule with a moisture content of from 1 to 10 wt.-% and with a particle size distribution characterized by a d 50 value of from 1 to 3 mm, and wherein said lime slurry provided in step (a) comprises distiller waste resulting from the ammonia regeneration step in a process for producing soda ash according to the Solvay process, and the lime slurry is made of solid matter suspended in an aqueous solution, and said solid matter comprises: - at least 1 and at most 70 wt.% lime expressed as Ca 2, - at least 5 and at most 60 wt.% calcium carbonate expressed as CaCO 3, - at least 1 and at most 40 wt.% calcium sulfate expressed as CaSO 4, - at most 15 wt.% magnesium hydroxide expressed as Mg 2, - at most 40 wt.%, preferably at most 30 wt.% or at most 20 wt.% of other minerals comprising silica, such as: silica, clays, iron silicate, aluminum silicate, or ettringite, and mixtures thereof, - at least 1 and at most 70 wt.% lime expressed as Ca 2, - at least 5 and at most 60 wt.% calcium carbonate expressed as CaCO 3, - at least 1 and at most 40 wt.% calcium sulfate expressed as CaSO 4, - at most 15 wt.% magnesium hydroxide expressed as Mg 2, - at most 40 wt.%, preferably at most 30 wt.% or at most 20 wt.% of other minerals comprising silica, such as: silica, clays, iron silicate, aluminum silicate, or ettringite, and mixtures thereof, and so that the sum of above solids components is 100 wt.%.