Modern secondary cooling technology in continuous casting of steel

Abstract

Continuous casting machines are now required to cast a wide range of steel grades while maximising production output. Consistent production of prime quality product requires increased operational and maintenance flexibility of the caster so that the optimum casting parameters can be maintained for each steel grade. This flexibility extends not only to the machine elements and control systems, but also to the secondary cooling system and demands more efficient and reliable spray cooling. Attentive design of secondary cooling systems, through cooling zone positioning, nozzle layout, nozzle selection and the use of appropriate secondary cooling control systems can provide these requirements. Minimum down time for maintenance is a key factor in maximising caster production; the use of the latest piping header systems and nozzle mounting arrangements can contribute to minimum secondary cooling maintenance. These header systems provide a rigid and self-aligning mounting for the nozzle, ensuring both nozzle alignment and maintenance accessibility.