CAST ING IN ELECTRIC ARC FURNACE:
- Foamed slag — reduction of n2, the effective removal of phosphorus up to 0,015%
- Ebt discharge — cut-off of the oxidized slag and reduction of nonmetallic inclusions
- Deacidification of the received intermidiate product from arc furnace — oxygen removal and reduction of the ammount of nonmetallic inclusions
STEEL PROCESS ING IN LADLE FURNACE
- Inert atmosphere under the arch of the ladle furnace can reduce the consistence
of nonmetallic inclusions
- The final sulfur contents are up to 0,015%
- Purging of liquid steel with an inert gas — removal of gas and nonmetallic inclusions
- Processing of liquid steel by cored wires with calcium fillers — removal of nonmetallic Inclusions
MELT PROCESS ING IN VACUUM DEGASS ING UNIT
Treatment of make-up water to compensate the losses in recirculating circuits in vacuum chamber in order to obtain the composition of:
• Hydrogen no more than 2,5 ppm
• Nitrogen no more than 70 ppm
CASTING BY CONTINUOUS CASTING MACHINES
- Reduction of non-metallic inclusions applying a complete protection of liquid steel steam from ladle to ladle furnace, from ladle furnace to the mould
- Electromagnetic stirring (M-EMS & F-EMS):
- reduction of inclusions, cavities, gas bubbles and pores on the surface and subsurface zone of continuously cast billets
- promotes equiaxial structure in the centeral part of continuously cast billets
- reduces central porosity of continuously cast billets
- decrease liquation of carbon and alloying elements of the continuous cast billets
- The hydraulic system of mold oscillation ensures the reduction in the depth of oscillation marks and high-quality surface of continuously cast billets
- Automatic control system in staching mode, straightening and cutting of continuously cast billets – exclusion of cracking
- Guaranteed cutting length
- Controls the roundness of billets at each melting complex, by using a continuous
casting machine operator
- Quality control system (second level) – billets defects prevention
- The control of continuous casting machine operator of billets ovality during the casting