NEW YORK Dearborn,
Mich.-based Severstal North America Inc., in a move to optimize
material consumption at its mill in Columbus, Miss., has signed
Italys More Srl to outfit the two 165-ton electric-arc
furnaces (EFs) serving the plants melt shop with a new
pneumatic lime/dolo-lime injection system.
The contract calls for the
installation of four of Mores 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.