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The analysis preceding the refurbishment showed that, in its place of replacing the whole pressure train, most effective the pressure trains on stands two and three needed to get replaced to eliminate the weak aspects. The obtainable installed reserves of stands one, 4 and five had been utilized and the weight optimally redistributed to achieve the necessary increase in throughput for the complete plant. New transformers and cycloconverters had been put in on stands two and three, and new motor and kit instruments had been established on the latest foundations. The "Motor Utilization model – MUM" newly developed by Primetals technologies become used for the first time to make the highest feasible use of the installed efficiency reserves of the new and latest stand motors. the weight turned into dispensed optimally to adapt it principally to the product combine and to gain the very best dynamic use of the forming forces of the particular person stands. The purpose became to achieve the highest diploma of forming along the finished line, and to come back as near as viable to the load limits of the individual stands.
The continual vigour of the brand new machines is round 36 percent greater and that they allow the rolling work to be optimally redistributed in the tandem mill. probably the most low-voltage drives were also replaced. as an example, the rollers on the infeed aspect at the moment are equipped with motors and drives which are up to 50 percent higher with a view to bring the necessary pulling force at bigger speeds. moreover the renewal of the drive equipment, the technological controls in the primary automation and the stage 2 rolling laws had been modernized. The refurbishment of all elements of the plant turned into deliberate in great detail and accomplished right on agenda in the timeframe of 15 days. It became even feasible to cling the primary exams of the rolling operation in the future earlier than scheduled. the primary strip turned into successfully rolled as planned on December 14, and the plant become introduced as much as its outdated throughput inside three days.
all the verifications for greater than 20 particular person product corporations, particularly interstitial free grades and other items for the automobile sector, had been achieved by the end of the first month. The plant also vastly surpassed the contractually agreed parameters within the first few weeks.
PLTCM at Hyundai's Dangjin web site now has a means of round million tonnes once a year. It approaches cold metal strip in widths starting from 600 to 1,800 millimeters. The entry thicknesses can fluctuate between and 6 millimeter, and from to 3 millimeters on the exit facet. The maximum strip velocity is 1,400 meters per minute. the road incorporates 4 4-excessive stands and one six-excessive rolling stand. Primetals technologies had geared up the road with system automation lower back in 2006.
source : Strategic research Institute, SteelGuru