Cookie Disclosure
This website uses cookies. By continuing to use the website, you consent to the use of cookies.
Please click here for more information.
Lechler Ltd
1 Fell Street, Newhall
Sheffield, S9 2TP, England
Tel: +44(0)114 249 2020
info@lechler.com
You are here: SELECTOSPRAY®
SELECTOSPRAY® Selective Roll Cooling Systems

SELECTOSPRAY® Selective Roll Cooling Systems

Why install a Lechler SELECTOSPRAY® system?

Benefits:

  • Dynamically controls heat transfer into the roll surface, generated by deformation / friction in the roll bite
  • Significantly improves strip flatness and counteracts asymmetric "shape" deviations
  • Maintains optimum work roll and strip surface quality
  • Reduces work roll surface deterioration and wear
  • Promotes and sustains stable roll coating in specific Cold Rolling and Hot Rolling applications
  • Facilitates a significantly wider operating range for other actuators and contributes to extended work roll campaigns and consequent work roll life 
  • Reduces applied volumes through more efficient application and improves recovery costs of coolant and lubrication

Details:


In the rolling process the most significant aspects are the generation of heat through friction and deformation in the roll bite. Because of the current demands on rolling mills to produce much lighter exit gauges from increasingly thicker hot strip input, much greater reductions are required on individual mill stands. Such higher reductions at a nominal width result in a larger area of contact with correspondingly higher rolling forces, friction and heat generation. These high reduction schedules combined with the requirement to produce widening range of material cross-sections with a more diverse range of softer and harder materials also result in increasingly greater challenges in the control of roll temperature and the effective transfer / extraction of heat.

The heat generated is partially absorbed by the work rolls through which the strip passes. This causes localised, irregular and variable thermal expansion of the work rolls. The changing profile of the work rolls is transferred to the strip and if uncorrected this results in out of shape, non-flat sheet  being produced with wavy edges and buckles.

Establishing a uniform homogenous cooling across the rolling width with a uniform and acceptable thermal distribution, without gradients, is the ultimate goal in terms of cooling to assure that the universal problem of post-cooled shape after recoil is minimized.

The most important considerations in production are:

Maintaining uniform, stable roll temperatures, circumferentially around the roll and transversely across the roll with precise controlled and metered cooling.

Creating optimum thermal crowns and minimum differential temperature in the upper and lower work rolls with optimum heat extraction.

SELECTOSPRAY® Selective Roll Cooling Systems

SELECTOSPRAY® Selective Roll Cooling Systems
SELECTOSPRAY®  Selective Roll Cooling Systems from Lechler have been setting standards in quality, performance and design for over 35 years.


 
Read more

Advanced Design & Engineering

Advanced Design & Engineering
Lechler are continually developing new advanced roll cooling Technologies such as the next generation of Integrated Closed loop Roll Cooling for multi-stand mills utilising state of the art touch screen operational interfaces with closed loop feed back to upstream stands ensuring optimum cooling and lubrication application in  both cold and hot rolling mills.

Read more

Application Know How

Application Know How
Lechler supports a long experience of designing and building roll cooling systems with considerable know-how in the operational and process field through our industry experts. 
Read more

Refurbishments and Spares

Refurbishments and Spares
  • A Selectospray® system is a zone controlled coolant spray – for asymmetrical events on the work roll
  • A Selectospray® system is just as important as the Mill Actuators
  • As such, every Selectospray® system should be maintained regularly using Lechler spare parts
  • After an extended period of use, a full refurbishment of the Selectospray® system is available from Lechler

Read more

Contact Details

Contact Details
Please contact us for more information 
Click here for contact details