Process for producing granulated potassium sulphate and potassium magnesium sulphates, and the granulates obtained thereby

摘要

The invention relates to a process for preparing granulated potassium sulphate or potassium magnesium sulphate, characterized by comprising the following steps: (a) grinding the potassium sulphate or potassium magnesium sulphate (b) mixing the ground product of step (a) with a corresponding unground sulphate until a predetermined particle size distribution curve is obtained (c) treating the mixture of step (b) with a hot, saturated solution of a corresponding sulphate until a wet paste is obtained, and the final further steps of granulating said paste and drying the granulate thus obtained. The invention also relates to the products obtained in this manner.