19 CONSUMABLE PARTS FOR SLIDE GATE VALVES CONSISTING MAINLY OF REFRACTORY MATERIAL, NAMELY WELL BLOCKS, STATIONARY CLOSURE PLATES, MOVEABLE CLOSURE PLATES, LADLE NOZZLES, COLLECTOR NOZZLES, CHANGEABLE COLLECTOR NOZZLES, POURING TUBES, PLATE INSERTS, NOZZLE INSERTS; CONSUMABLE REFRACTORY MATERIAL FOR USE WITH SLIDE GATE VALVES, NAMELY MORTARS, CEMENTS, RAMMING MATERIAL, GRANULAR FILLER MATERIAL