9th ECCC European Continuous Casting Conference – ECCC 2017

Cooling Zones at casting machines are typically equipped with air-mist nozzles to guarantee a wide turn down ratio (typically 1:9) from highest to lowest water flow at a constant spray pattern. To prevent corner cracks the Zones are additionally split into center and margin strips across the casting width. Primetals Technologies DynaJet Flex is the new cooling system to bring the...

Secondary cooling is an important process in continuous casting in the steelmaking division from the viewpoints of stable industrial operation and the quality of cast slabs. Historically, hydraulic spray nozzles were originally used in the continuous casting process, but mist spray nozzles were developed subsequently to prevent clogging of the nozzle tip and surface cracks of cast slabs....

In continuous casting secondary cooling the cooling intensity has to be accurately adjusted in order to achieve the desired strand surface temperature. The cooling intensity can be varied by changing the water flow rate through the nozzle. For a homogeneous cooling effect the nozzle flow rate must not drop beyond a nozzle-specific minimum value. In many cases lower cooling rates are required,...

In the initial secondary cooling zones for the radial slab caster it is necessarily to keep the following conditions: set the hard cooling to remove a large amount of heat when keeping the cooling uniformity to avoid overcooled corners. In these days the problem how to satisfy these requirements is handled by using more cooling nozzles in the one line with water overlapping areas. This paper...

In the secondary cooling zone of the continuous casting process the steel is cooled down by water and water/air nozzles. The cooling has to be sufficient enough to ensure a certain shell thickness and finally the complete solidification of the material. Further a controlled and uniform cooling strategy is important to minimize the amount of defects in the solidified steel. To determine the...