FOR CLIENTS

Technological scheme of billet casts production

Technological scheme of billet casts production
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