The production process of CRC from HRC is highly automated and can be divided
into the following:
Push Pull Pickling Line
This line cleans HRC by using acid solution to eliminate oxide scale and other deposits on the surface and make it ready for Cold rolling process. The total pickling capacity of ASML accounts to 850,000 tons/annum.
Skin Pass & Recoiling Mill
Skin passing is done to improve mechanical properties and achieve specified surface finish, hardness and flatness. After skin passing the finished product will be treated as Bright Finish CRC or Dull Finish CRC as per customer requirement which then passed through a recoiling line and coated with corrosion protection oil. The coil size is also adjusted according to customer needs.
Cold Rolling Mill
The Rolling Mill is heart of the cold rolling complex. In this equipment, the cleaned HRC is rolled into thin gauges, at room temperature, by applying hydraulic force through a set of roles. Cold rolled steel possesses refined surface, enhanced strength and better dimensional accuracy compared to HRC. The output from this mill can be sold as “Full Hard CRC”, Full Hard CRC for GI or further processed into “Annealed CRC”. The total Rolling capacity of ASML accounts to 850,000 tons/annum.
Rewinding Line (RWL)
RWL reduce the winding tension of rolled coils for annealing as per its requirement. Its produce FG coils as well by splitting it according to customer requirement and perform oiling to prevent from rust.
Electrolytic Cleaning Line
Electrolytic cleaning is a pre-treatment in which oil and fine particles of iron are removed by brushing in alkali liquid jet environment.
Batch Annealing Furnace
Batch Annealing Furnace (BAF) transforms “Full Hard CRC” into “Annealed CRC” in controlled atmosphere furnaces. Currently the company is equipped with 13 heating bells and 13 cooling bells, with an annealing capacity of approx. 350,000 tons/annum of CRC.
Roll Shop (RS)
Roll shop possess Roll Grinding Machine, Shot blasting Machine & Roll assembly machine. Roll Grinding Machine is used to grind the rollers of Cold rolling & Skin passing mill. Shot blasting machine used to prepare roll surface for Dull Finish CRC to be used during skin passing. Assembly machine used for chocking & De-chocking of Work Roll/Back Up roll assembly.