Patent ID: 6013209
Filing Date: 2000-01-11
Classification: B01J,C05G

Abstract:
A method of uniform granulation, comprising the steps of:providing an initial feedstock having a uniform size distribution of about 99.9% particle size of -150 mesh of said 99.9% particle size of -150 mesh about 90% comprising a particle size of -200 mesh;providing a nucleating material,granulating said feedstock in a plurality of phases, said phases includinga nucleating phase including contacting nucleating material in a size distribution of about -35 mesh and +150 mesh with said feedstock to form a particle;introducing a binder material in the presence of moisture onto a first pan granulator to progressively layer feedstock material on said nucleating material;a second seeding phase including layering feedstock onto said particle from said first phase to form a first intermediate product or seeding agent having a size distribution of -8 mesh to +20 mesh;drying said seeding agent; anda third granulation phase including selectively introducing said seeding agent into a second pan graduator for further layering of feedstock to form a second product having a uniform size distribution of -8 mesh to +4 mesh.