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Huaigang to Modernize Rod and Bar Mill with Kocks Technology
Dec. 2, 2010 Huaigang Special Steel Co. Ltd., a company of the Chinese Jiangsu Shagang Group, placed an order with the German company Friedrich Kocks GmbH & Co KG in Hilden for the modernization of its existing rod and bar mill. The target of this modernization, which will implement a Kocks 3-roll Reducing & Sizing Block (RSB), is to increase product quality in a bid to strengthen the company’s market position.
Commissioning of the new 3-roll RSB is scheduled for the first half of 2012.
The new RSB is dimensioned to operate with four 3-roll stands and a nominal roll diameter of 215 mm. It will be implemented as finishing block in the 600,000 tonnes-per-annum rolling mill behind an existing 10-year-old Danieli Morgårdshammar roughing and intermediate mill consisting of 18 2-high HV stands. The 3-roll block will roll straight bars from 13.0 to 22.0 mm onto the cooling bed.
The RSB allows rolling out of only one pass series from the roughing and intermediate mill, reducing the number of required feeders. The optimum adjustment values for motor speed, rolls and guides as well as gear steps are calculated by the bar mill configuration system Bamicon in relation to the final product.
Kocks’ scope of supply includes the 3-roll RSB with automatic quick stand changing system, remotely controlled adjustment of passes and guides, 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. The company will also be in charge of erection and commissioning supervision.
Huaigang Special Steel Co. Ltd. is based in Huai’an, a city with roughly five million residents in the Jiangsu province, hometown of the former Chinese Premier Zhou Enlai. The company’s predecessor, the Qingjiang Iron & Steel Factory, was established in 1970. Huaigang has 6000 employees and, with an annual steel production of 2.8 million tonnes, ranks among the top 50 Chinese metallurgical companies. The company is one of the major suppliers of spring steel for the automotive industry and high-speed trains.