Contact mass make-up

Claim 1

IN A SYSTEM CIRCULATING GRANULAR CONTACT MASS THROUGH A DOWNFLOW PATH INCLUDING A REACTION ZONE AND RETURNING THE MAIN BODY OF SUCH CONTACT MASS TO A FEED HOPPER AT AN UPPER LEVEL FOR REPEATED DOWNWARD FLOW, GRANULAR MATERIALTO SAID MAIN BODY AT CONTROLLED RATES; SAID MEANS COMPRISING: AN INDEPENDENT UPRIGHT LIFT CONDUIT DISCHARGING AT ITS UPPER END INTO SAID FEED HOPPER, AN UPRIGHT SOLIDS SUPPLY CONDUIT ADJACENT TO SAID INDEPENDENT LIFT CONDUIT, A SUBSTANTIALLY HORIZONTAL BRANCH LINE PROVIDING COMMUNICATION BETWEEN SAID SUPPLY CONDUIT AND SAID LIFT CONDUIT; A GAS NOZZLE CONCENTRIC WITH SAID BRANCE LINE ARRANGED FOR LATERAL MOVEMENT ALONG THE AXIS OF SAID BRANCH LINE TO A POSITION APPROXIMATE THE INLET OF SAID BRANCEH LINE, SAID GAS NOZZLE BEIG OF SMALLER DIAMETER THAN SAID BRANCH LINE, SAID GAS NOZZLE BEING PROVIDED WITH CONTROL MEANS FOR FIXING THE RATE OF GAS DISCHARGED INTO SIAD BRANCH LINE, AND SEPARATE MEANS FOR SUPPLYING LIFT GAS TO SAID INDEPENDENT LIFT CONDUIT AT A LOCATION BELOW SAID BRANCH LINE.