"ROLLING MILL” is the unit in which the billets produced in the Melt Shop are rolled within tolerances to the dimensions requested by the customer. In the production of high-quality steel, the produced billets must be rolled in an efficient rolling mill that has caught up with modern technology. For this purpose, the rolling mill unit, which made its first modernization in 1998, added strength with its second modernization in 2015 and ÇEMTAŞ QUALITY STEEL ROLLING MILL has added new products to its production range. Çemtaş special steel rolling mill is an indispensable part of special steel production with its 210,000 tons/year capacity and computer automation possibilities required by the modern rolling process.



The Rolling mill department consists of the following units:


Walking Hearth Furnace
The reheating furnace has a capacity of 50 tons / hour. Furnace temperature in each zone, furnace pressure, combustion air, flue gas temperatures, air and fuel quantities can be controlled automatic or manually. By these controls, the scale formed at the surface of the billet during annealing is minimized. In this way, possible surface defects that can occur related to scale during rolling process are prevented as well as material loss and a significant advantage is provided in production costs. After the furnace exit, the billets go into the descaling unit for surface scale removal.

Descaler Unit-1
The scale layer on the surface of the billet is cleaned with a pressure of 350-400 bars of water spray generated from four rotating tornado heads, each containing 8 nozzles. 3 pumps are used to obtain high pressure. By spraying the pressurized water spray with a rotary motion from the tornado heads, maximum cleaning action is achieved on the surface of the billet for the rolling process.

Sliding Roughing Stand
Before the continuous rolling process, the billets are rolled in the sliding roughing mill. It is a duo stand system with a sliding reverse mechanism,. The delivery of materials to the rollers, orientation, and adjustment of the measurements is controlled by automation program.

Descaler Unit-2
It is a secondary scale cleaning unit within the rolling process. After the roughing mill, the secondary scale layer (iron-oxide)  formed on surface of the rolled material is cleaned with water spray of minimum 100 bar water pressure in 3 different zones located before and inside the continuous rolling mill. Pressurized water sprayed on the surface of the bar effectively cleans the scale layer and enhances the surface quality of the finish material.

Intermediate and Finishing Continuous Mills
It consists of twelve rolling stands, three horizontal and three vertical in the intermediate group, three horizontal and three vertical in the Finish group. Intermediate roll group was put into operation with the investment made in 2015. The finishing mill group automation made in 1998 is also revised with the latest systems of rolling technology. As a result of these investments, production with precise tolerances has been achieved with advanced technology advantages. Material flow, speed and other parameters can be simulated on the operation screens with the process to provide simultaneous control.

Instant Dimension Measurement Gauge
Each bar produced is passed through the 100% size control by the instant dimension measuring device at the end of the finishing mill. This device uses 3 rotary laser units to perform instant scan of dimensions and display the results online. With this measurement it is checked that conformity to standards according to the profiles of the bars is produced within tolerances. The system is computer controlled and production is controlled and standardized.

Cooling Bed
"The cooling bed is partially covered at the enterence to enable controlled slow cooling at the begining The piling system is designed to provide controlled cooling of the flat bars and allows the materials to cool in contact with each other which provides slow and controlled cooling. In the round section production, the products are taken to the grill as two bars at the same time by the double notch system and the slow cooling is achieved. In addition to these systems, there is also a cooling speed control and slow cooling lids that allow slow cooling of steels with air hardenability in the cooling grid"

Cutting Area
It is the unit where the materials coming from the cooling bed are cut into the length requested by the customer. Here, abrasive or shear cut is preferred according to customer request, material quality and material size.

Automatic Packaging Unit
It is the unit in which the cut bars are packed according to the customer's request. respectively Stacking, strapping, wire binding, weight measurement and labelling operations are available in this unit.