Patent ID: 8268233

Claim:
A tuyere, comprising: a cast or milled metal body having a general shape of a nozzle and having a front end and outer surface for exposure to heat during operation and connections for a circulating fluid coolant; a serpentine passageway for said circulating fluid coolant disposed in the cast or milled metal body, and generally proceeding in a single flat or curved plane; a series of baffles disposed within the serpentine passageway and providing for turning said circulating fluid coolant in each of a series of serpentine loops; a thickening of each one of the series of baffles towards their respective distal ends and finishing in a radius end around which said circulating fluid coolant is turned into a next one of said series of serpentine loops; a radius of the inside of the serpentine passageway relative to said single flat or curved plane and radial to each thickening of each one of the series of baffles where said circulating fluid coolant is turned into a next one of said series of serpentine loops; wherein, eddies in said circulating fluid coolant are eliminated.