Medium and apparatus and methods for its preparation

are described fine-grained direct spray drying products with bulk densities ranging from 220 g / l to 500 g / l and a particle diameter d50 in the range of 0.12 mm to 0.6 mm. These products, as well as those which contain only water-soluble inorganic components are characterized by a relatively uniform particle size distribution of, are free-flowing and rapidly soluble and do not clump. They can be treated. DOLLAR A post-treated medium, an apparatus and method for producing the direct spray drying product and the post-treated medium and conditioned medium are also described.