Performance of Rolling Oil in Tandem Mill
PERFORMANCE OF ROLLING OIL IN A TANDEM MILL
Presented By: Darshan Keshari Mgr (ILS)/ Ranchi Indian Oil Corporation Ltd
Acknowledgements:
Dr. D. Saxena, IOC R&D Sri. S.K. Panda, IOC MD
Dr. S. Paul, IOC R&D
Sri. Sunil Kumar, SAIL- BSL.
PROCESS FLOW DOIAGRAM OF A TYPICAL STEEL PLANT
TANDEM MILL
FATE OF METAL STRIP DURING ROLLING
COLD ROLLING
ROLLED COIL
ROLLING OIL HAS TO TAKE CARE OF THE ROLL PROFILE AND LOAD FOR EFFECTIVE HEAT REMUVAL AND PROVIDING MINIMUM RECEDUE
Annealing Furnace
Annealing Cycle Curve
During Annealing, the Oil component residues should evaporate leaving no marks on the strips after Skin Pass
Skin Pass Mill
Emulsion (Roll Coolant) System
Functions:
Cooling of Rolls. Lubrication between rolls and strip. Reduction in rolling load, inter Stand strip tension and roll wear Improving surface quality of the strip/ sheet Protection against corrosion
The development and introduction of new rolling processes requires better performance oils as manufacturing demands become higher.
The latest oil developments are able to simultaneously provide high lubricity and strip cleanliness as well as reduce the rolling oil consumption.
PERFORMANCE OF A COLD ROLLING OIL IN A TANDEM MILL
Mill Specifications
Brief Specificati Brief ons Fig Unit Specifications Fig Unit Input Strip Thickness of Thickness 1.8-5.0 mm the rolled strip 0.4-2.0 mm 700Rolling Speed Strip Width 1850 mm in 4th Stand Up to 20 m/sec Max Strip Coil Weight Up to 35 Tons tension on reel Tons 11.5 Max Rolling Coil ID mm Load Tons 600 3000 1200Coil OD 2200 mm Max Static Load 4000 Tons
Reduction Ratio:
Tandem Mill - Reduction Ratio
Initial Width Stand I Stand II Stand III Stand IV 100% 15-20% 30-35% 20-25% 10-15% Reduced Thickness % Max Min 0.85 0.80 0.60 0.52 0.48 0.39 0.43 0.33
Emulsion Re-circulation System
System System I Tank Size (KL) Tank I Tank II 25 25 100(stand by) 100 100 100 (stand by) Oil Supply Stand I Temp Deg C
Presented By: Darshan Keshari Mgr (ILS)/ Ranchi Indian Oil Corporation Ltd
Acknowledgements:
Dr. D. Saxena, IOC R&D Sri. S.K. Panda, IOC MD
Dr. S. Paul, IOC R&D
Sri. Sunil Kumar, SAIL- BSL.
PROCESS FLOW DOIAGRAM OF A TYPICAL STEEL PLANT
TANDEM MILL
FATE OF METAL STRIP DURING ROLLING
COLD ROLLING
ROLLED COIL
ROLLING OIL HAS TO TAKE CARE OF THE ROLL PROFILE AND LOAD FOR EFFECTIVE HEAT REMUVAL AND PROVIDING MINIMUM RECEDUE
Annealing Furnace
Annealing Cycle Curve
During Annealing, the Oil component residues should evaporate leaving no marks on the strips after Skin Pass
Skin Pass Mill
Emulsion (Roll Coolant) System
Functions:
Cooling of Rolls. Lubrication between rolls and strip. Reduction in rolling load, inter Stand strip tension and roll wear Improving surface quality of the strip/ sheet Protection against corrosion
The development and introduction of new rolling processes requires better performance oils as manufacturing demands become higher.
The latest oil developments are able to simultaneously provide high lubricity and strip cleanliness as well as reduce the rolling oil consumption.
PERFORMANCE OF A COLD ROLLING OIL IN A TANDEM MILL
Mill Specifications
Brief Specificati Brief ons Fig Unit Specifications Fig Unit Input Strip Thickness of Thickness 1.8-5.0 mm the rolled strip 0.4-2.0 mm 700Rolling Speed Strip Width 1850 mm in 4th Stand Up to 20 m/sec Max Strip Coil Weight Up to 35 Tons tension on reel Tons 11.5 Max Rolling Coil ID mm Load Tons 600 3000 1200Coil OD 2200 mm Max Static Load 4000 Tons
Reduction Ratio:
Tandem Mill - Reduction Ratio
Initial Width Stand I Stand II Stand III Stand IV 100% 15-20% 30-35% 20-25% 10-15% Reduced Thickness % Max Min 0.85 0.80 0.60 0.52 0.48 0.39 0.43 0.33
Emulsion Re-circulation System
System System I Tank Size (KL) Tank I Tank II 25 25 100(stand by) 100 100 100 (stand by) Oil Supply Stand I Temp Deg C