Speaker
Description
Improving energy efficiency and product quality in hot strip mills is essential to meet
the increasing demands for modern production facilities. Primetals Technologies
developed an advanced work roll lubrication and cooling package, including the
innovative Power Work-Roll Cooling system. This integrated solution combines
energy efficient dynamic work roll cooling, advanced roll-gap lubrication, and an
innovative work roll cleaning system to deliver superior performance, reduced costs,
and enhanced energy efficiency.
The Power Work-Roll Cooling system can achieve up to 70% energy savings
compared to conventional cooling methods by operating at significantly lower
operation pressure (4 bar vs. 13 bar) while maintaining high cooling efficiency. Solidjet nozzles are providing a concentrated coolant flow that enhances heat transfer
and overcomes the "pool effect," which may reduce cooling efficiency of traditional
systems. Additionally, the dynamic cooling enables a flexible and precise thermal
crown control by adjusting flow rates across the entire length of the roll barrel,
ensuring optimal strip contour and flatness. An additional key feature is the new
“WRL NC: Work Roll Lubrication Non-Cooling” solution to reduce roll forces by up to
20%, achieving further energy reduction, excellent strip surface quality and reduced
work roll wear.
The package also includes a unique feature: an innovative work roll cleaning
solution, that removes residual oil on the work roll surface between strips, enabling
work roll lubrication over the whole strip length. This synergy of the sophisticated
cooling, lubrication, and cleaning arrangement ensures consistent quality over the
entire strip, reduced operational costs, and enhanced sustainability for modern hot
rolling mills.
These developments represent a major jump forward for hot strip mills, combining
energy efficiency with exceptional operational performance to address the evolving
challenges of both high-quality and high-capacity steel production.