COLD ROLLING

PROCESS FLOW DIAGRAM:-

PRODUCTION PROCESS:-

PICKLING PROCESS
ACCIL has installed Push Pull Type Hydrochloric Acid Bath Pickling Line. It can process HR Coils upto 1250mm width and thickness upto 4.0mm max. Acid bath cleaning and rinsing of HR Coils is a standard process before cold rolling.Our Pickling Line has got certain important features to produce best quality materials in a very clean environment viz:

•	Micro Processor based Automatic Controls to make it continuously variable speed line.
•	Auto Temperature Control of Acid Baths to maintain consistency in quality of the pickling. Wet Scrubber Fume exhaust system to have clean environment in the plant.
•	Energy efficient system incorporating VVVF Drives & SCADA automation to be cost effective.

6 Hi COLD ROLLING MILL

6 Hi single stand, high tension, reversible mill is installed for cold rolling of the pickled coils to the desired thickness as low as 0.13mm.
Mill has all the capability and capacity to produce cold rolled sheet of practically table top flatness.
Good Quality material output has been ensured by way of the following technology adopted in the mill:

•	Online Sheet thickness measurement and hydraulic gauge correction system.
•	Optimum utilization of capacity by implementation of Auto Pass Shedule.
•	Variable Crown System to achieve high flatness index.
•	Consistently good quality material output through computerized controls of mill’s operational parameters through VVVF Drives & SCADA Automation.
•	Higher yields achieved through intermediate & coil ends slow down controls.

CONTINUOUS GALVANIZING LINE
ACCIL has installed Hot Dip Galvanising line with all the facilities to produce high quality Galvanised steel Coils/Sheets. The salient features are:
• Continuous chemical cleaning process

•	Further cleaning and annealing through Non-Oxidising Controlled environment through Non-Ox Furnace to achieve best adhesiveness of Zinc coating.
•	Online Skin Pass Mill to provide desired surface finish, Uniform and controlled thickness to microns level accuracy.
•	Online Tension Leveller to eliminate shape defects such as coil set, crossbow, crown, camber and centre buckle. In short a TABLE TOP, ZERO SPANGLE FLAT STRIP is produced.
•	Online coating thickness measurement system ensures uniform coating across the width and length of sheet.
•	Line & Non-Ox Furnace have centralized controls through VVVF Drives & SCADA automation

COLOUR COATING LINE

This plant has got all the capability and capacity to produce high quality Colour Coated Coils / Sheets to meet the requirements of technologically advanced infrastructure steel and O.E.M sector like white goods and automotive industries. The line consists of:

• Chemical cleaning of the strip
• Chemical coaters to ensure the best adhesiveness of paint
• Coater from GFG, USA, world’s best coater plant supplier – to ensure uniform coating of paint.
• Guide Film for surface protection during transit and storage

PRODUCT DETAILS:-

1. Cold Rolled Coils/Sheets (Full Hard)

Thickness	0.13mm - 2.5mm (Tolerance +/-5 Microns)
Width	750mm - 1250mm (Tolerance -0/+5mm) or as per customer requirement
ID	508mm
Length of sheet	As per customer requirement
Coil Weight	As per customer requirement and upto 25MT(Max)
Specification	As per IS 513 Grade D/DD/EDD or as per customer requirements

2. Galvanised Plain Coils/Sheets

Thickness	0.15mm - 1.5mm (Tolerance +/-5 Microns)
Width	750mm - 1250mm (Tolerance -0/+5mm)
Coil ID	508mm
Coil OD	1850mm max.
Coating Thickness	120 – 300 GSM or as per customer demand
Coil Weight	As per customer requirement upto 20MT (max) or Packet Weight – upto 5MT
Sheet Length	As per customer requirements upto 4500mm
Material Quality	Galvanised Full Hard / Soft in Grade CQ, D, DD, EDD and Skin Passed
Surface Finish	Glossy finish with uniform Spangle, Zero Spangle
Specifications	As per IS 277- 1994 or as per customer requirement

3. Galvanised Corrugated Sheets

Thickness(mm)	Width(mm)	Length (feet)
0.15 – 0.35	720 – 900	Upto 12ft
0.30 – 0.45	760 – 900	Upto 14ft
0.50 – 0.80	760 – 1065	Upto 16ft

Coating Thickness	120 – 300 GSM or as per customer demand
Packet Weight	as per customer requirement (2.5-5MT)
Material Quality	Galvanised Full Hard
Surface Finish	Regular Spangle
Specifications	As per IS 277- 1994 or as per customer requirement
Application	Roofing/cladding

4. Colour Coated Coils/Sheets & Profiles

THICKNESS RANGE	Galvanized & Galvalume: 0.20 to 1.00 mm Aluminium – 0.20 – 1.20mm
WIDTH RANGE	610 to 1250 mm
EXIT COILS	Coil Weight - Upto 15MT, Coil ID – 508mm
COATING STDS	As per IS 14246-1995, ASTMA 755, JIS G 3312, EN 10169-1
COATING DFT	Top Coat 15-22 Microns including Primer Backcoat 7-12 Microns including Primer Or as per customers requirement
PAINT TYPES	RMP, SMP, Epoxy, Acrylic & PVDF