Nucor Orders Bar Mill Redesign from SMS
At Darlington, uniform rolling size for intermediate and finishing segments
At Darlington, uniform rolling size for intermediate and finishing segments
SMS Meer reports that Nucor Steel is undertaking a significant redesign of its No.1 bar mill at Darlington, SC. SMS will supply and commission a new intermediate rolling segment and a new finishing train, to increase mill availability by reducing changing, set-up, and tuning times, and optimizing spare part stocking.
The plant designer explains that each of those factors will be simplified by a redesign that involves a single, uniform stand size in the intermediate segment and the finishing train. SMS states that the current six intermediate and eight finishing stands will be replaced by four horizontal, one vertical, and three convertible housingless stands. The new stands will be arranged for continuous rolling.
Nucor Steel’s Bar Mill Group operates the 1 million-tons/year mini-mill at Darlington, SC. It has two rolling mills producing rounds, flats, angles, channels, and rebar products. The 12-in. mill (No.1) is listed as a 550,000-tons/year has four roughing stands prior to the intermediate rolling section. (The No.2 mill is listed as a 14-in. line, with a capacity of 350,000 tons/year.)
For the redesign, SMS Meer will supply the new gearboxes, spindles, supports, and protection facilities, as well as a flying shear, inter-stand equipment, quick-change devices and tools, hydraulic and lubrication units, and 12 change cassettes.
In addition, SMS plans to supply a PLC-based automation package (Control Logix / Flex Logix) with corresponding software for the new stand controllers. The new control system will be interfaced to Darlington’s existing production process control platform.
Under SMS’s construction supervision and commissioning service, the project is scheduled to be complete late in 2009 or early in 2010. SMS indicates that all equipment will be pretested in its workshop prior to delivery.
The plant designer explains that each of those factors will be simplified by a redesign that involves a single, uniform stand size in the intermediate segment and the finishing train. SMS states that the current six intermediate and eight finishing stands will be replaced by four horizontal, one vertical, and three convertible housingless stands. The new stands will be arranged for continuous rolling.
Nucor Steel’s Bar Mill Group operates the 1 million-tons/year mini-mill at Darlington, SC. It has two rolling mills producing rounds, flats, angles, channels, and rebar products. The 12-in. mill (No.1) is listed as a 550,000-tons/year has four roughing stands prior to the intermediate rolling section. (The No.2 mill is listed as a 14-in. line, with a capacity of 350,000 tons/year.)
For the redesign, SMS Meer will supply the new gearboxes, spindles, supports, and protection facilities, as well as a flying shear, inter-stand equipment, quick-change devices and tools, hydraulic and lubrication units, and 12 change cassettes.
In addition, SMS plans to supply a PLC-based automation package (Control Logix / Flex Logix) with corresponding software for the new stand controllers. The new control system will be interfaced to Darlington’s existing production process control platform.
Under SMS’s construction supervision and commissioning service, the project is scheduled to be complete late in 2009 or early in 2010. SMS indicates that all equipment will be pretested in its workshop prior to delivery.
