LONGSTANDING EXPERIENCE AS A LEADING SUPPLIER OF COLD-ROLLING MILLS
As a lifecycle partner for cold-rolling mills, Primetals Technologies offers complete solutions and support packages for cold-rolling mills that extend from the initial investment idea, to mill planning, layout, engineering and construction, up to turnkey plant installations and full-scale plant modernizations.
A state-of-the-art cold-rolling mill is a prerequisite for the production of steel strip that satisfies the tightest tolerance demands at high productivity levels – for carbon, stainless and special steel grades such as AHSS (advanced high-strength steel). On the basis of decades of experience in the supply of cold-rolling mills combined with continuous technological innovation, Primetals Technologies offers fully optimized mill configurations that meet the specific requirements of each customer.
TANDEM COLD MILL
Tandem cold-mill solutions from Unisons stand for high product yields combined with flexible production, low operational costs and simplified maintenance work.
Depending on the product mix, the production capacity of continuous tandem mills from Unisons can exceed 1.2 million tons per year. The goal is to provide solutions that offer maximum added value for customers. Advanced mill stand actuators contribute to improved yield, user-friendly mill operation, and high-quality strip that lies within the specified tolerance values. Both 6-high and 4-high mill stands with their specific features and benefits are supplied on the basis of detailed analyses of product and customer requirements.
COUPLED PICKLING LINE & TANDEM COLD MILL
High-capacity production of high-quality products.
For a wide range of product applications, the required strip thickness, flatness and surface quality can be achieved more economically by linking the pickling and cold-rolling processes. This offers significant improvements with respect to mill productivity, yield and production cost savings as a result the elimination of strip-threading and tailing-out operations. Reduced strip-head and tail-end losses also contribute to better overall yield. Speed-optimization systems from Unisons ensure the highest throughput rates under all operating conditions. In addition, maintenance, roll consumption and manpower requirements are lowered. Typical production capacities of such combined facilities are in the range of 1.2–2 million t/a.
REVERSING COLD MILL
Advanced reversing cold-mill technology from Unisons International is an ideal solution for small- to medium-sized production capacities, or for the rolling of smaller order lots of special steel grades. Depending on the product mix and quality demands, Unisons offers 6-high or 4-high mill stands to meet the respective product and customer requirements.
In reversing cold mills the tension reels are placed on both ends of a single- or two-mill-stand arrangement. Due to the reversing rolling passes, production efficiency is lower than that of a tandem mill. However, because the rolling parameters can be quickly changed for each coil, reversing cold mills are especially suitable for the small-lot production of various product types. The size of the mill equipment is also smaller, which allows easier access to mill equipment and machinery for maintenance purposes. Due to their simpler design, reversing mills can be more easily stopped and restarted. They are also less expensive to purchase and operate.
Excellent Flatness and a Perfect Finish.
The advantages of skin-pass mills (also known as temper mills) from Primetals Technologies include full compliance with tight strip elongation tolerances; excellent flatness performance; high surface quality with respect to roughness, peak count and low residuals; and the availability of wet and dry skin-passing modes. Primetals Technologies supplies stand-alone and inline skin-pass mills in either single- or two-stand design for adjusting the final mechanical properties, flatness and surface finish of cold-rolled strip. Due to its higher rolling forces, 6 high UCM-Mill is the preferred skin-pass mill solution to meet the continually increasing demands placed on strip flatness, elongation and roughness, especially for hard-material grades.
SPECIAL STEEL MILL
Efficient Rolling of Hard Materials.
Special steel mills from Unisons are specifically designed for the rolling of stainless steel, electrical steel and other special-purpose steels. The most common configuration is the single reversing mill. Various mill designs are offered that include 6-high UCMs (Universal Crown Control Mill), ZR mills and 12-high cold-rolling mills with small-diameter work rolls for the efficient rolling of materials of high hardness.