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Severstal NA sprucing up melt shop at Columbus mill

Keywords: Tags  Severstal North America, mini-mill, electric furnace, modernization, More Srl, melt shop, modernization, lime injection system Jo Isenberg-O'Loughlin

NEW YORK — Dearborn, Mich.-based Severstal North America Inc., in a move to optimize material consumption at its mill in Columbus, Miss., has signed Italy’s More Srl to outfit the two 165-ton electric-arc furnaces (EFs) serving the plant’s melt shop with a new pneumatic lime/dolo-lime injection system.

The contract calls for the installation of four of More’s 1,760-gallon-capacity Moli dispensers for pneumatic injection of lime and dolo-lime from silos to the EFs, two Limejet combined 5-megawatt burner/lime injector units for each EF shell (one for lime and one for dolo-lime), and oxygen and natural gas stands.

As part of the package, More will also supply its Autoslag fluxes optimization software, which calculates the quantity of fluxes that should be added to the current melt to keep the slag within targets of basicity and ensure optimum slag-foaming conditions.

The new system will replace a pre-existing practice that calls for the charging of lime through the fifth hole of a furnace. Completion of the project is scheduled for the fourth quarter of this year.

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