Hyundai Steel orders heavy plate mill equipment from Primetals

by David Fleschen

Recently, Primetals Technologies received an order from Hyunday Steel or the installation of a new intermediate cooling (IC) technology at its heavy plate mill line located in Dangjin, South Korea. The cooling unit will be installed between the roughing mill stand and the finishing mill stand. This enhancement will substantially increase the mill’s productivity, enabling the production of high-quality steel plates tailored to the most demanding markets, including the shipbuilding and oil and gas industries.

Primetals Technologies will be responsible for the design, engineering, equipment supply, installation, training, and commissioning of the IC unit, including electrical, automation, and related fluids equipment.

The IC unit is 12 meters long and will incorporate side sweep sprays, air blow offs, and cooling stations. Positioned after the roughing mill exit table, this unit employs a total of eight top and eight split-bottom stainless steel cooling headers. The possibility of controlling the number of headers in use and the unit’s accurate speed control deliver the desired cooling intensity, which is tailored to each individual product.

The automation systems supplied as part of the technology package include Level 1 and Level 2 automation, ensuring efficient monitoring and control of the water supply to the cooling headers from the overhead tank. The IC technology guarantees precise cooling for the transfer bars as required by the production strategy.

When processing a steel plate on a 2-stand mill, the plate is transferred from the roughing mill stand to the finishing mill stand for the final rolling step.  Depending on the process parameters, the transfer time is deliberately extended, creating a pause in the rolling sequence. This pause, known as the hold time, can account for a significant portion of the total production time for a single plate, leading to reduced mill utilization.

The new cooling system, positioned after the roughing mill, will efficiently decrease the overall hold time of the plates or transfer bars between the stands, thereby reducing the processing duration for a single plate. This enhancement significantly boosts mill productivity.

Source and Photo: Primetals

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