EE WAS REMOVING CHUNKS INSIDE OF A PREHEATER TOWER VESSEL USING AN AIR LANCE. EE PINCHED HIS RIGHT MIDDLE FINGER BETWEEN THE AIR LANCE AND THE EDGE OF TOWER PORT. FINGER WAS X-RAYED AT LOCAL H OSPITAL AND DETERMINED THAT EE HAD BROKEN A BONE CHIP FROM THE END OF HIS FINGER AND STITCHES WERE USED TO CLOSE A LACERATION.