Cooling and defoaming phosphoric acid slurries

Claim 1

A PROCESS FOR CONTINUOUSLY COOLING AND DEFOAMING PHOSPHORIC ACID SLURRY FORMED BY THE REACTION OF ACID WITH PHOSPHATE ROCK AND HAVING A LAYER OF FOAM THEREON, WHICH COMPRISES ESTABLISHING AN EVERCHANGING BODY OF THE SLURRY TO BE COOLED AND DEFOAMED; CONTINUOUSLY FEEDING INTO SAID BODY AT A POINT OF INTRODUCTION THE SLURRY TO BE COOLED AND DEFOAMED; CONTINUOUSLY DISCHARGING A COOLED AND DEFOAMED SLURRY FROM SAID BODY AT A SEPARATE POINT OF DISCHARGE WHILE MAINTAINING THE SURFACE OF SAID BODY AT A RELATIVELY CONSTANT LEVEL, CONTINUOUSLY DIRECTING AT LEAST ONE JET OF COOLING AIR DOWNWARDLY ONTO THE SURFACE OF SAID BODY FROM AN ISSUE POINT SPACED ABOVE AND SEPARATE FROM SAID SURFACE IN AT LEAST ONE ZONE EXTENDING SUBSTANTIALLY TRANSVERSELY ACROSS THE PATH FLOW OF SLURRY BETWEEN SAID POINT OF INTRODUCTION AND SAID POINT OF DISCHARGE IN SUCH A MANNER AS TO FORM AT LEAST ONE DEPRESSION IN THE SURFACE OF SAID BODY WITHIN SAID ZONE; AND CONTROLLING THE QUANTITY AND VELOCITY OF SAID JET OF COOLING AIR IN SUCH A MANNER AS TO MAINTAIN THE DEPTH OF SAID DEPRESSION SUFFICIENTLY DEEP FOR RECEIVING THEREIN FOAM CARRIED THERETO WITH SAID SLURRY, SAID QUANTITY AND VELOCITY OF SAID JET EFFETIVE TO BREAK UP THE THUS RECEIVED FORM WITHIN SAID DEPRESSION, AND FURTHERMORE CONTROLLING SAID QUANTITY AND VELOCITY IN SUCH A MANNER AS TO MAINTAIN SAID SLURRY SUBSTANTIALLY AT A TEMPERATURE OF ABOUT 80*C.