LANGUAGE PRIMETALS TECHNOLOGIES COMPETENCES ABOUT US CAREERS CONTACT PRESS&MEDIA CONTINUOUS STAINLESS STEEL ANNEALING AND PICKLING LINES Home > Primetals Technologies > > Processing> Continuous Stainless Steel Lines CONTINUOUS STAINLESS STEEL LINES Stainless lines from Primetals Technologies combine the traditionally separate processes of rolling, annealing and pickling, skin passing, and leveling in one integrated processing line. Primetals Technologies’ stainless lines feature integrated rolling and processing, using additional lateral support rolls to ensure stable and controllable rolling, cleaning sections that ensure strip cleanliness prior to the annealing furnace and annealing and pickling sections using a tunnel type furnace and acid pickling. Annealing and Pickling Section The work-hardened strip requires annealing and surface scale removal. This is achieved with a tunnel type furnace and chemical pickling section. For hot band, Primetals Technologies also provides shot blast and scale breaker equipment between the furnace and pickle section to help with oxide removal. Features: Annealing section with first stage, unfired pre-heat, for increased efficiency Air and water cooling Electrolytic and mixed acid pickling with additional brush scrubbers High-turbulence line tanks Brush and spray rinsing Main benefits High-efficiency and low-NOx burners Maintained strip shape High maximum process speed Optimum pickling Integrated Rolling and Processing Primetals Technologies direct-rolling, annealing and pickling lines combine the traditionally separate processes of rolling, annealing and pickling, skin passing, and leveling into one integrated processing line. Features: Annealing and pickling line Welder Skin-pass mill and tension leveller Main Benefits: Reduced yield loss due to less coil handling No leader strips required for cold rolling; no coil preparation line required Welds can be rolled for certain strip grades, further minimizing losses Reduced lead time from order to final product Less work in progress, lower inventory costs Operating cost savings from reduced labor and utility consumption Cold-rolling Section A key element of the integrated process is the in-line rolling mill. The 18 roll stand concept, recently redeveloped by Primetals Technologies to create the POWER X-HI mill, includes a number of unique features specially designed for these applications. Due to the high work-hardening characteristics of stainless steel, small work rolls are required to achieve the necessary reduction. The technology uses additional lateral support rolls to ensure stable and controllable rolling. Lateral shifting of intermediate rolls and positive and negative bending of the intermediate rolls allows for shape correction. The mill is equipped with an automatic roll change car for work rolls and intermediate rolls enabling roll replacement while the process section is operated. Features Multistand tandem six-high mill or eighteen-high mill with intermediate roll bending and shifting Hydraulic automatic gauge control at all stands Primetals Technologies patented quick roll change system Roll and strip lubrication and cooling via high-capacity mineral oil recirculation Main benefits Accurate shape control Work rolls and intermediate rolls can be changed while process section is at full speed Cleaning Section Strip surface quality is an essential property of stainless flat products. Strip cleanliness prior to the annealing furnace is therefore essential. Primetals Technologies has designed an in-line degreasing section that ensures the highest product quality. Features A combination of spray, immersion and brush technologies Full „cleaning solution“ not merely a cleaning section Main benefits Maximized operating efficiency Flexible and automatic set-up parameters to match product requirements Optimization of utility consumption Waste reduction Fig.1- Tension reel and associate equipment | Fig.2- Entry section equipment | Fig.3- Direct Rolling and Annealing Line, LISCO, China Modernization Primetals Technologies has vast experience in upgrading and modernization of processing lines. With a systematic approach, we work closely with our customers to develop a tailored modernization concept based on their individual needs taking all boundary conditions fully into account. The solution may be purely electrical, automated, mechanical or a combination. Based on the selected concept, the modernization can be carried out in several steps or during a plant shutdown. Primetals Technologies’ experience minimizes downtimes and ensures a fast start-up and top quality. Reference Story High-productivity stainless steel cold rolling complex Customer Baosteel Desheng, Fujian, China Plant type Direct Rolling Annealing and Pickling Line Our solution A 4 stand patented POWER X-HI tandem cold mill coupled with an annealing and pickling line including a skin pass mill. Two lines in one to decrease the operational cost and to produce top quality products. CONTACT AND SUPPORT You have questions? We‘re always happy to help you! FURTHER INFORMATION Videos I Accept primetals.com uses cookies. By using our website you are agreeing to our Cookie Policy. 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