EE WAS CLEANING OUT #1 COAL CHUTE THAT WAS PLUGGED, UNHOOKED THE AIR LANCE, POKED THE MATERIAL WHEN IT UNPLUGGED THE AIR LANES LINK WELDED ON THE SIDE CAME DOWN ON MY LEFT HAND WHICH HIT THE T OP OF THE FEEDER BREAKING MY LEFT THUMB. IT DID NOT HAVE GLOVES ON.