November 22, 2008
POSCO orders for SMS and slab caster for new plate mill
Siemens VAI Metals Technologies has received an order from the POSCO for the installation of a new Greenfield steel mill at its production site at Gwangyang in South Korea. The project will be implemented in consortium with POSCO E&C and POSCON.
The first slab is scheduled to be cast on the new caster in May 2010, which will be rolled to plates in a new plate mill also under construction
The project scope includes engineering and the supply of key components, systems and technological packages for an LD converter, RH degassing plant and slab caster.
Siemens Metals Technologies will provide engineering and key equipment for a 250 tonne LD converter and offgas system, an RH degassing plant and a 2 strand slab caster with a nominal casting capacity of 3.2 million tonnes of slabs per year. The converter supply includes the maintenance free VAI Con Link suspension system, converter tilting unit with drive, an oxygen valve stand for the LD lances and slag stoppers for minimized slag carry over during tapping. The dry type converter offgas treatment system will be designed to cool and dedust up to 200,000 meter cube of offgas per hour in accordance with the strict Korean environmental standards. The 250 ton RH degassing plant will reduce the hydrogen and nitrogen gas content of the liquid steel to acceptable values as required for the production of high quality plates.
The 2 strand slab caster with a casting bow radius of 9.5 meters will be capable of casting slabs with thicknesses of 250mm and 300mm millimeters and in widths ranging from 1,400mm to 2,400 mm. The caster will be equipped with a wide array of technological packages. This includes DynaFlex for the online flexible adjustment of the mold oscillation parameters, SmartMold with its cassette type mold design that allows the copper plates to be quickly exchanged and LevCon 2 for improved automatic mold level control. A SmartBender will be installed as the first segment in the strand support system to enable fast slab-thickness changes to be carried out. Advanced caster segments of the type SmartSegment will enable the online and fully automatic adjustment of the slab thicknesses. DynaGap SoftReduction technology will allow the strand taper in the area of final solidification to be dynamically adjusted for improved internal strand quality. The Level 2 Dynacs secondary cooling system featuring dynamic strand-cooling management ensures ideal cooling conditions according to the respective steel grade.
