Hilden/Germany (Kocks) – Xuanhua Iron & Steel placed the order for the supply of a 3-roll Reducing & Sizing Block [RSB] with Friedrich Kocks GmbH & Co KG. Xuanhua is a division of the state-owned Hebei Iron & Steel Group ranking among the top five Chinese steel producers. This division is located in Zhangjiakou, a city with roughly 4.5 Mio. residents in Hebei province, approximately 100km northwest of the capital Beijing. The RSB is designated for the small bar mill, one of Xuanhua’s five new rolling mills currently under construction. The 3-roll block will be implemented in this new rolling mill behind the 2-high roughing and intermediate mill, which will consist of 18 HV stands. The scope of supply includes the 3-roll Reducing & Sizing Block with automatic quick stand changing system, pass and guide remotely controlled adjustment as well as the roll shop equipment with quick roll change and CAPAS, the computer aided system for accurate adjustment of rolls and roller guides of 3-roll stands. Besides the supervision of erection and commissioning Kocks will, for the first time, also be responsible for the process and the equipment of thermo-mechanical rolling, which is part of the scope of supply as well. The RSB in „Heavy Duty” design is dimensioned for the operation with four 3-roll stands and a nominal roll diameter of 370 mm. It is designed to produce straight bars within a range of 14 to 90mm à˜ at a rolling speed of 18m/s. The new 3-roll block allows rolling out of one pass series in the roughing and intermediate mill and thus significantly reduces the number of the required pre-sections. Any desired finished dimension of the complete dimensional range can be produced in any desired sequence with a minimum number of roll sets and just a few stand changes only. The optimum adjustment values for motor speed, rolls and guides as well as gear steps are calculated by the bar mill configuration system BAMICON depending on the final product. All this ensures a trouble-free, economic production of top quality bars. Commissioning of the new 3-roll Reducing & Sizing Block is scheduled for the end of 2011.

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