HBIS commissions high-performance hot strip mill

The new high-performance hot strip mill supplied by SMS group has successfully started production at HBIS Laoting Iron & Steel Co. Ltd. in China. With this facility, HBIS Group, a leading steel producer in China, has set up a new, ultra-modern production facility for flat products at the Laoting location.

The high-performance hot strip mill has an annual capacity of 4.1 million tons and produces hot coils with widths of up to 1,900 millimeters. Final thicknesses range between 1.2 and 25.4 millimeters.

The product mix includes, besides low-alloy carbon steels, high-strength automotive grades, weather-resistant structural and container steels, pipe grades, boiler and pressure vessel steels and steels for use in ship and bridge construction.

The hot strip mill comprises as main equipment a roughing mill descaler, a slab-sizing press, a two-high reversing roughing mill, a four-high reversing roughing mill with attached edger, a mandrel-less coilbox and a crop shear, and at the finishing end a descaler, a seven-stand finishing mill and a laminar cooling system.

Three downcoilers produce straight-edged coils of finished hot strip. Downcoiler No. 3 has been specifically designed for the challenging task of coiling thick, high-strength strips.

The described system configuration provides HBIS Laoting maximum flexibility in planning and production. For example, the slab sizing press in the entry area of the hot-strip roughing mill enables a width reduction of up to 350 millimeters.

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