Optimisation of Technologies for Hydro-Mechanical Descaling of Steel

by Jürgen W. Frick

Publisher - Lechler GmbH

Category - General Novel

As well as the customers in the automotive industry, manufacturers of construction and agricultural machinery using hot rolled steel for outer body parts demand defect free surfaces. The production of oil and gas pipe lines has also set very stringent surface quality standards to the plate mills rolling API steel grades. Existing rolling mills entering into these lucrative markets for high quality steel often struggle to fulfill those quality requirements because of the limitations of the descaling systems installed in terms of pressure and flow rate. In addition to the potential for optimizations of existing systems, the potential for optimization of the nozzle design itself has now been fully utilized in order to maximize the impact at a given water flow and pressure. New design methods and production technologies have been applied. This paper describes the: 1. Nozzle spray characteristics 2. Optimisation of impact measurement technology 3. Design features of conventional descaling nozzles 4. Main new design features of the new descaling nozzle Scalemaster Superior 5. CFD – Computational Fluid Dynamics 6. Reduction of nozzle internal pressure loss 7. Reduction of nozzle internal turbulences 8. Explanation of impact increase of Scalemaster Superior 9. User benefits of the new descaling nozzle Scalemaster Superior 10.Conclusion

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