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Danieli to Install New Hot Strip Complex for Dongbu Steel

09/24/2007 - Working in consortium with MHI, Danieli will supply Dongbu Steel with a new hot strip mill complex, including two AC EAFs, two ladle furnaces, vacuum degasser, two slab casters, and a hot strip mill.

Dongbu Steel Co. Ltd., Korea, recently placed a contract with Danieli, in consortium with MHI, for a new upstream production line.
 
Danieli will install the new 2.6-million tonnes/year plant at the Asan Bay works in consortium with MHI. Two of Dongbu’s major targets for the project were improved plant flexibility and lower transformation costs.
 
The new facility’s meltshop consists of two AC Electric Arc Furnaces, two twin Ladle Furnaces, and a double-tank Vacuum Degasser. Each 160-tonne Electric Arc Furnace will be equipped with a Consteel continuous scrapcharging system, chemical energy injection, and HiREG electrode digital regulation system to optimize energy consumption. The furnaces, which will operate with a tap-to-tap time of 46 minutes, can be charged with different combinations of scrap, pig iron and HBI.
 
The casting plant consists in two independent Danieli single-strand thin slab casters capable of producing 70- to 85-mm thick slabs (after Dynamic Soft Reduction), with widths ranging from 800 to 1650 mm. The casters will be equipped with the cutting-edge technologies associated with the Danieli fTSC (flexible Thin Slab Casting) concept for thin slab production, including Danieli’s patented, long-funnel H2 (High quality, High speed) mold, hydraulic oscillation, complete thermal mapping, vertical-curved design, dynamic soft reduction, and dynamic air-mist secondary cooling.
 
The Hot Strip Mill will produce strips 800- to 1650-mm wide with a maximum coil weight of 30 tons.
 
Danieli’s scope of supply covers all main mechanical, electrical, and automation equipment, including a complete Level 2 automation system with mathematical models for the dynamic control of the casting operations. According to Dongbu Steel's plans, the new facility will be put in operation during the summer of 2009.
 
Dongbu Steel is a leading producer of cold rolled steel sheet, galvanized, pre-painted, and tinplated sheets, and medium- to large-diameter pipes, with annual production capacity of 2.6 million tonnes.