Siemens Awarded Contract to Supply Equipments for New Steel Mill in ...

Tag : carbon steel
The Ukrainian steel producer Zaporizhstal Integrated Iron &Steel Works JSC (Zaporizhstal JSC) awarded Siemens VAI Metals Technologies a major contract for the supply of hot-metal desulphurizationstations, LD steelmaking converters, ladle furnaces, a vacuumoxygen decarburization plant, dedusting facilities and slab castersfor a new steel mill under construction in Zaporizhzhya, a city insoutheastern Ukraine.
This metallurgical complex will be capable of producing 4.7 milliontons of carbon steel grades per year for a wide range of industrialapplications. Following start-up of the oxygen steelmakingfacilities scheduled to begin in late 2010, Zaporizhstal JSC willeventually terminate its open-hearth-steelmaking production andingot-casting route, resulting in significant cost savings, productquality and environmental advantages.

For the new steel works under construction on the Dnieper River inthe city of Zaporizhzhya in southeastern Ukraine, Siemens VAI willprovide basic engineering for the steel bay and plant layout inaddition to detailed engineering and the supply of key processequipment. This includes two hot-metal desulphurization stations,two 250-ton-capacity LD (BOF) oxygen steelmaking converters, twotwin-station ladle furnaces, a VOD (vacuum oxygen decarburization)plant, two 2-strand slab casters, primary and secondary dedustingfacilities and the related electrical and Level 1 and Level 2automation systems. For this project Siemens VAI will also supplytwo hot-metal ladle-transport lines, twelve 300-ton torpedo carsfor transporting hot metal, ladles, a laboratory, and variousauxiliary facilities and spare parts.
The LD (BOF) converters will be outfitted with the VAI-Con Linksuspension system, oxygen lance systems, sublances and VAI-Con slagstoppers to minimize slag carry-over during tapping. Converterdoghouses will be provided to reduce converter emissions within thesteel bay and to improve operational safety. The dry-type primarydedusting systems will be supplied with round-type electrostaticfilters characterized by a low energy consumption and high degreeof efficiency. The offgas cooling stack is designed as a waste-heatboiler for the generation of steam. A gas-recovery system andsecondary-dedusting systems will also be supplied, the latter ofwhich are equipped with pulse-jet filter technology.
The two 2-strand slab casters with straight molds are bow-typecasters with bow radii of eight meters and maximum metallurgicallengths of 27.8 meters. The machines will be capable of casting atotal of 4.7 million tons of slabs per year at thicknesses of 150,165 and 220 millimeters and in widths between 900 and 1,550millimeters. A broad range of technological packages will beprovided to optimize production performance, casting flexibilityand product quality.

These include LevCon automatic mold-level control with fullyautomatic start of casting operations, MoldExpert forstrand-break-out prevention, DynaWidth for the automatic adjustmentof the slab width during casting and DynaFlex for the on-lineadjustment of the mold-oscillation parameters. Furthermore,SmartSegments will be installed for the remote adjustment of theroller gap settings for casting different slab thicknesses, which,in combination with DynaGap SoftReduction technology, will compressthe slab thickness in the area of final strand solidification toimprove the internal slab quality. Level 2 process models includethe Dynacs secondary cooling model, YieldExpert for optimization ofthe cut-slab length as well a VAIQ slab-quality control.
Advisory services for erection, start-up and commissioning as wellas training round off the Siemens VAI scope of supply.

Posted September 27th, 2008