Abstract:
Oxyfuel is a technique widely used in most industries for cutting steel due to the fact that it has the lowest cost, and its configuration is quick and simple. The cutting nozzle is one of the main components of this process, the cutting oxygen speed, its outlet pressure and the shape of the jet are directly related to the geometry of the cutting nozzle. The objective of the work is to compare, through computer simulation, analytical calculations and experimental tests, two cutting nozzles for the Sinobras Continuous Casting Oxyfuel machine, aiming to choose the one that will bring higher quality with lower cost for the cutting process. The difference between the speeds was proportional to the two analyzes, analytical and numerical, an increase of approximately 30% in the speed of the cutting oxygen with test nozzle. The test nozzle range, according to the numerical simulation, was also 50mm higher. However, there were no significant changes in the quality of the billet cut in the hypothesis test performed. There was a reduction in gas consumption, but in relation to the cost of the test nozzle, standardization is not feasible.