The technology measures such as optimiing parameters of tundish
adopting control flow device combined shock bowl possessed of roof flange with single dam
using a new typical ascillator with full plate spring resonance model
added a set of externnal electromagnetic stirer are implemented to increase the cleanliness of liquid steel
improve the surface quality of round cast billet
the equiaxial crystal ratio and the structure of billet. After technology revamping
the annual output of φ210~310 mm round billet at Tianjing Pipe increased up to 900000 t from 600000 t and the comprehensive qualified rate of casting billet increased up to 99.66%.