In the last quarter of 2013, three continuous slab casters from Siemens Metals Technologies were put into operation at Chinese steel producer Taiyuan Iron and Steel Group Corp (Tisco). Two of the casters were installed in Tisco's carbon and special-steel works in Taiyuan and the third in the company's stainless steel works at the same location.
Each of the continuous casters is designed to produce one million metric tons of slabs per year. The new casters increase Tisco's capacity for manufacturing high-quality carbon, silicon and stainless steels. Siemens' technology packages ensure that they produce slabs with a high interior and surface quality.
Tisco is China's leading producer of stainless steel. Two single-strand continuous slab casters, CCM 1 and CCM 2, from Siemens have been in operation in Steel Making Plant 2 North since 2007. Now that the third caster, CCM 0, has gone on stream, Tisco can produce an additional one million metric tons of stainless-steel slabs every year. The casting plant has a machine radius of nine meters and a metallurgical length of 27.4 meters. The thickness of the slabs can be varied between 180 and 250 millimeters and their width from 1,000 to 2,150 millimeters.
The other two continuous casters, CCM 01 and CCM 04, were erected in Steel Making Plant 2 South, which is Tisco's carbon and special-steel works. CCM 01 replaces one of the two Siemens continuous casters which have been in operation there for many years. The two new casting plants are almost identical in order to optimize maintenance, operation and spare parts stocks. They have a machine radius of eight meters and a metallurgical length of 27.6 meters. The thickness of the slabs ranges from 200 to 230 millimeters and the width from 830 to 1,630 millimeters. The two plants cast a wide range of carbon steels and special steels with high silicon content, and each has an annual production capacity of one million metric tons of slabs.All three Siemens casters feature a cassette-type Smart Mold with a hydraulic DynaFlex mold oscillator. The plants are equipped with DynaWidth for automatic setting of the slab width, and Smart Segments are installed in the strand-guiding system. DynaGap Soft Reduction enables the position of the final solidification of the strand to be determined with high precision, which means the roll gap can be controlled precisely to ensure high internal slab quality. Dynacs dynamic secondary cooling and DynaJet nozzles, combined with internally cooled I-Star Rollers, produce a slab surface of consistently high quality. Siemens also supplied the complete basic (level 1) and process automation ) level 2) for the three casters and assisted Tisco with construction and commissioning.
The Metals Technologies Business Unit (Linz, Austria), part of the Siemens Industry Sector, is one of the world's leading life-cycle partners for the metals industry. The Business Unit offers a comprehensive technology, modernization, product and service portfolio as well as integrated automation and environmental solutions covering the entire life cycle of plants. For more information, visit http://www.siemens.com/metals
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