STAINLESS ANNEALING AND PICKLING LINES — EFFICIENT, RELIABLE, ECONOMIC
Stainless Lines combine the traditionally separate processes of annealing and pickling, skin passing, and leveling in one integrated line.
Primetals Technologies’ Stainless Annealing and Pickling Lines (APL) include various combinations of processes, such as annealing, pickling, skin passing, and leveling, and can be designed for hot-rolled and/or for cold-rolled products.
STAINESS ANNEALING AND PICKLING LINES
Primetals Technologies' terminal and mechatronic equipment have been specially designed to process stainless steels, focusing on the highly demanding surface finish. The annealing section is of tunnel type furnace with unfired pre-heat first stage, fume heat recovery, high-efficiency and low-NOx burners. The chemical section features high-turbulence tanks, electrolytic tanks, and brush scrubbers. For hot-rolled products (HAPL), shot blasting equipment and a Scale Breaker are installed between the furnace and pickle section to help with oxide removal. For cold-rolled products (CAPL), a multistage cleaning section is installed upstream of the furnace.
Main benefits
- High maximum process speed
- Low operating costs
- Multistage cleaning section with spray and brushes and cascade rinsing
- High-efficiency and low-NOx burners
- Fume heat recovery
- Shot blasting with frequency-controlled wheels
- Optimum pickling: high turbulence and electrolytic pickling tanks
- Strip surface finish quality with 2 highly polished Skin-Pass Mill rolls with in-line roll polishers
Mechatronic machines for Stainless Annealing and Pickling lines
In-house mechatronic machines designed, assembled and tested in our Primetals Technologies workshops:
- Wet or Dry Tension Leveler and Scale Breaker (more than 400 references worldwide)
- 2-Hi Skin-Pass Mill with automatic roll change and polishing unit
- Turret-type Side Trimmer, EdgeMon® (edge monitoring), and Scrap Chopper
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Complete automation and process control for Stainless Annealing and Pickling Lines
Plant productivity and product quality are substantially depending on the quality of plant automation, process control, and available process optimization functions. To get the best performance out of a plant, Primetals Technologies provides add-on specific optimization solutions for further improvement of production efficiency and strip quality, besides standardized high performance automation system.
Throughput maximization with:
- Off Gauge Optimization for integrated rolling process
- Speed Optimization System for throughput optimization
- Flying Roll Change Stand during rolling
Excellent Strip quality with:
- Roll Eccentricity Expert for uniform and accurate strip thickness
- Flatness Optimizer
- ChatterBlock Controller / Mill Chatter Monitoring with automatic process speed adaptation
TECHNOLOGY AND MODERNIZATION PACKAGES
Get striking results with incremental investments
| Name | Short Description |
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| Integrated Solenoid Valve (ISV) Spray System | ISV Roll coolant spray bars for hot and cold rolling mill strip flatness control |
| EdgeMon | Inspection of side-trimmed strip edge surface for steel pickling and processing lines and aluminum rolling |
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Reference Story: High-productivity stainless steel cold rolling complex
Customer
Sumitomo Metal Industries Ltd., Kashima, Japan
Plant type
Annealing and Pickling Line for Stainless steel
Technical Data
Strip thickness: 2.0 – 5.0 mm
Exit Strip width (Max): 1300 mm
Line Speed (Max): 32 m/min
