In November 2007, Posco Pohang Iron & Steel Company Ltd. (Posco) placed an order for the supply of a two-strand ultra-thick, slab caster capable of casting up to 1.3 million tons of a wide range of carbon steel grades per year. The caster, designed with a metallurgical length of 24 m, was erected in the Continuous Casting Plant No. 3 (CCP3) in the Pohang Works.
Following the start-up of the caster in the two-strand casting mode, all equipment and systems functioned as designed beginning with the first heat. Slabs are cast with a thickness of either 250 mm or 400 mm, and at widths from 1,100 mm to 2,200 mm. The caster features a wide range of technological packages in the Siemens VAI product portfolio for slab casters. This includes DynaFlex for the flexible adjustment of the mold-oscillation parameters, LevCon mold-level control, DynaWidth slab-width adjustment and Smart Segments for fast slab-thickness changes.
The combination of Dynacs 3D, 3D Sprays and I-Star Revolver rollers offers a maximum in secondary cooling flexibility as the basis for achieving highest slab surface quality. Dynacs 3D calculates the temperature at any point within the strand in real time, allowing the optimum secondary-cooling setpoints to be defined. Dynamically adjustable 3D Sprays prevent overcooling of the slab corners for all slab widths. The application of I-Star Revolver rollers, which do not require spray-water cooling, supports a more gradual and uniform cooling of the slab surface. This minimizes the tendency of surface defects when casting crack-sensitive steel grades or ultra-thick slabs.
The particularly high internal quality of the slabs is ensured by the unique machine concept. A 3.6 m long vertical section at the top of the strand-guide system promotes the floating of undesired impurities present in the liquid steel. Thanks to the application of DynaGap SoftReduction, the final strand-solidification position can be precisely determined. This allows the roller-gap taper in the area of final strand solidification to be dynamically and precisely adjusted, which minimizes strand segregation as required for high-end products. The Connect & Cast capability of the installed technological packages not only shortened the installation and assembly period, but also accelerated the production ramp-up to nominal capacity.
The described slab caster is the only ultra-thick slab caster in Korea. This start-up follows the commissioning of the 400 mm ultra-thick slab caster in June 2010 at Qinhuangdao Shouqin Metal Material Co., Ltd. in Qinhuangdao City, Hebei Province, China.
Further information about solutions for steel works, rolling mills and processing lines can be found at http://www.siemens.com/metals
The Siemens Industry Sector (Erlangen, Germany) is the worldwide leading supplier of environmentally friendly production, transportation, building and lighting technologies. With integrated automation technologies and comprehensive industry-specific solutions, Siemens increases the productivity, efficiency and flexibility of its customers in the fields of industry and infrastructure. The Sector consists of six divisions: Building Technologies, Drive Technologies, Industry Automation, Industry Solutions, Mobility and Osram. With around 204,000 employees worldwide (September 30), Siemens Industry achieved in fiscal year 2010 total sales of approximately €34.9 billion. www.siemens.com/industryThe Siemens Industry Solutions Division (Erlangen, Germany) is one of the world's leading solution and service providers for industrial and infrastructure facilities comprising the business activities of Siemens VAI Metals Technologies, Water Technologies and Industrial Technologies. Activities include engineering and installation, operation and service for the entire life cycle. A wide-ranging portfolio of environmental solutions helps industrial companies to use energy, water and equipment efficiently, reduce emissions and comply with environmental guidelines. With around 29,000 employees worldwide (September 30), Siemens Industry Solutions posted sales of €6.0 billion in fiscal year 2010. www.siemens.com/industry-solutions
Dr. Rainer Schulze | Siemens Industry
Making lightweight construction suitable for series production
24.04.2017 | Laser Zentrum Hannover e.V.
It Takes Two: Structuring Metal Surfaces Efficiently with Lasers
15.03.2017 | Fraunhofer-Institut für Lasertechnik ILT
More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.
Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...
Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.
"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...
The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...
The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...
Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.
Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...
28.04.2017 | Event News
20.04.2017 | Event News
18.04.2017 | Event News
28.04.2017 | Medical Engineering
28.04.2017 | Earth Sciences
28.04.2017 | Life Sciences