The steel works can produce bottom-poured ingots up to the size I 195 (200 t) poured in controlled Ar atmosphere.
The raw materials for steel production include steel scrap, selected recyclable waste, various grades of pig iron and alloying additions. Crude steel is first smelted in an electric arc furnace and subsequently refined in the ASEA ladle (a duplex process). This method makes it possible to attain the following limits of impurities:
|sulphur||max. 0.005% (0.002%)|
|hydrogen||max. 1.0 ppm|
|oxygen||max. 25 ppm|
||max. 50 ppm|
The micro-purity of steel is guaranteed at the level of K4 (DIN 50602), max. 40 (20).