LONG PRODUCTS BULLETIN - SMS Meer GmbH

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New order Slovakia Steel Mills a.s. placed an order with SMS Concast AG and SMS Meer GmbH for the supply of a complete mini steel mill consisting of an electric steel plant, a continuous caster and a rolling mill for the production of bar steel and wire rod at an annual production rate of 500,000 t. The new plant in Strážske with a total area of almost 37 ha is the first mini mill to be built in Slovakia and production is scheduled to start in Q4 2010. Electric steel plant with 60-t AC electric arc furnace. The key element of the steelworks is a 60-t AC electric arc furnace from SMS Concast designed for 100% scrap charging. The electric arc furnace has an eccentric bottom taphole and a full platform design. A 60- MVA transformer together with chemical energy input provided by the equipment from Consotech ® guarantees an optimized power input. The latest-generation electrode control system and the process automation regulate all the functions of the electric arc furnace and guarantee the repeatability of the performance parameters even with differing charge scrap compositions. An efficient automation system monitors the overall performance and guarantees constant operating and melting costs. 60-t ladle furnace provides secondary metallurgical treatment. The facility from SMS Concast ensures that non-metallic inclusions are avoided and guarantees outstanding castability and 32 Newsletter No. 3/2009 Minimills for long products All production facilities from SMS Concast and SMS Meer SSM, Slovakia: Minimill for bar steel and wire rod ordered optimized product properties. The transformer employed has a rated power of 16 MVA + 20% overload reserve. The process control systems offer the operator a possibility of communication, including laboratory and steelworks planning. The process status is documented. Calculations for assessment of temperature and additives for alloying and slag formation simplify the achievement of the target parameters. Three-strand billet caster. In the development of the continuous caster the production demands with respect to steel grade and annual production were taken into consideration by the engineers from SMS Concast. Attention was additionally given to the demands for the quality steels to be produced in future SBQ applications for the automotive and machine engineering industries. Against this background, a continuous caster with three strands having a radius of eight meters and equipped with Convex ® technology was selected. Its extremely high level of automation meets all process requirements and quality demands. Hot charging. The direct link between continuous caster and rolling mill using roller tables and a billet hoist permits hot charging for the majority of the production. Square billets of 130 mm x 130 mm and a maximum length of 12 m are used for all rolled products.
The new metallurgical complex will be equipped with BAT eco-technologies to meet European directives. Rolling mill with three finishing lines. The rolling mill has three finishing lines consisting of wire rod outlet, bar outlet with highspeed delivery (HSD ® ) system and the patented vertical compact coiler (VCC) for particularly compact rebar coils. Scope of supply from SMS Meer. SMS Meer supplies a walking-hearth furnace for a capacity of 60 t/h with cold charging and 80 t/h for hot charging, the mechanical and electrical equipment for the rolling mill, the supply systems for hydraulics and lubricating oil, and is also responsible for the supervision of erection and commissioning. Production of steel bars. The six-stand roughing mill, followed by a cropping and chopping shear, and the eight-stand bar finishing train both have housingless stands arranged alternately horizontally and vertically. The finishing mill is equipped with a quick-change platform for quick program changing. Production of wire rod. In the wire delivery section, the shear group and a wire rod block with ten rolling units are arranged downstream of a water box on which sizes from 5.5 to 16 mm can be rolled with a maximum speed of 105 m/s. Two further water boxes, a pinch roll unit, a loop laying head, an 82 m long loop cooling conveyor (LCC ® ), a coil forming chamber, a vertical coil transport facility and the vertical coil compactor complete the wire rod outlet section. Production of rebars. For the production of rebars, the wire rod block supplies the dimensions from 8 to 16 mm via a cooling section at speeds of up to 36 m/s to the proven high-speed delivery (HSD ® ) system. The larger dimensions up to 36 mm are produced on the bar finishing mill and are also delivered to the HSD ® system via a water cooling section. Downstream of the 66 m long cooling bed is a cold shear, an automatic bar counter, a bundler, two wire tying machines and the coil loading station. VCC coiler. A further special feature is the patented VCC coiler from SMS Meer. This proven technology produces extremely compact coils in the size range from 8 to 16 mm at speeds of up to 35 m/s. In the first planned development stage, only one coiler will be installed. For this, the switch behind the cooling section diverts the products alternately either to the VCC coiler or to the HSD ® system. The later installation of a second coiler is planned. Layout of minimill. The new steelworks and the rolling mill of Slovakia Steel Mills will be installed on an area of 36.7 ha in the industrial zone of Strážske, East Slovakia. Investments amount to EUR 178 million. For the production of high-grade structural steel state-of-the-art technologies are applied. Thanks to the investment, 350 jobs are directly created for this region and about 250 indirect jobs will be available plus approx. 700 work places during erection. Newsletter No. 3/2009 33
Page 1 and 2: LONG PRODUCTS BULLETIN Special Edit
Page 3 and 4: The new wire rod mill has been desi
Page 5 and 6: Commissioning Stahlwerk Annahütte
Page 7 and 8: The core element of a modern heavy-
Page 9 and 10: Celsa’s section mill: preventing
Page 11 and 12: Good for the environment and for re
Page 13 and 14: Five-strand billet caster The casti
Page 15 and 16: The here realized beam blank castin
Page 17 and 18: Piya Chairat, Plant Manager of Siam
Page 19 and 20: The minimill for medium sections of
Page 21 and 22: Service SMS Meer (UK) Ltd.: Service
Page 23 and 24: Commissioning SMS Meer has moderniz
Page 25 and 26: Commissioning Long-product Mills Ab
Page 27 and 28: New order About 1 million t of stee
Page 29 and 30: The new pre-assembly bay. Component
Page 31: The CRS® roller straightener. To m
Page 35 and 36: Furnace and rolling mill Reheat fur
Page 37 and 38: Magnetic stacker. Saw in operation.
Page 39 and 40: For this modernization the continuo
Page 41 and 42: Yield improved by 30 %. A benefit o
Page 43 and 44: Temperature progression for wire ro
Page 45 and 46: Automatic gage control and monitor
Page 47 and 48: The wire outlet starts with a cropp
Page 49 and 50: Annual capacity: 690,000 t of wire
Page 51 and 52: New order Capacity: 1 million t of
Page 53 and 54: Finishing area with 90-m cooling be
Page 55 and 56: Revamp with just minor production l
Page 57 and 58: Higher yield and closer length tole
Page 59 and 60: Universal rolling in the compact st

LONG PRODUCTS BULLETIN - SMS Meer GmbH

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