1. APPARATUS FOR THE GRANULATION OF CHEMICAL SUBSTANCES FROM THEIR MELT, WHICH COMPRISES A SUBSTANTIALLY VERTICAL ELONGATED GRANULATION TOWER, AT LEAST ONE SUBSTANTIALLY VERTICAL ANNULAR GAS INLET SLOT DEFINED IN THE LOWER PORTION OF SAID TOWER EXTENDING SUBSTANTIALLY PARALLEL TO AND ADJACENT THE INNER SURFACE OF THE TOWER WALL, GAS-PROPELLING MEANS POSITIONED FOR PASSING A STREAM OF GAS UPWARD THROUGH SAID GAS-INLET SLOT AND SAID TOWER, WHEREBY THE GAS HAS THE GREATEST VELOCITY ALONG THE INNER SURFACE OF THE TOWER WALL, MOLTEN LIQUID DISPENSING MEANS POSITIONED AT THE TOP OF SAID TOWER FOR RELEASING DROPS OF MOLTEN LIQUID INTO SAID TOWER, AND A GRANULAR MATERIAL OUTLET AT THE BOTTOM OF SAID TOWER.