STEELMAKING FACILITIES

Additional information Chief Metallurgical Engineer V.F. Shumakiov phone.: +38 (06264) 7-88-18
Deputy Head Metallurgical Engineer V.I. Zema phone.: +38 (06264) 7-89-96
fax: +38 (06264) 7-15-49
 

  Technical capabilities of Steelmaking facilities allow to obtain forging ingots weighing between 1,6 and 170 tons and up to 200 tons of liquid metal for steel castings production.

  Steelmaking facilities consist of:

  • 1 pc. EAF with the capacity of 50 tons
  • 2 pcs. EAFs with the capacity 12 tons each
  • 1 pc. EAF with the capacity of 5 tons
  • 2 pcs. After-furnace ladle-steel treatment units "Ladle-furnace
  • vacuum-degassing area based on steam jet pump and 4 vacuum vessels including vacuum vessel for VD and VOD processes

 Metal smelting is performed insteelmaking units within minimum time with subsequent treatment at within minimum time with the subsequent after-furnace ladle steel treatment in the "Ladle-furnace" units and vacuum degassing..

Depending on the preset chemical composition and required properties of steel it may be either top poured in vacuum or bottom poured in the air.
   
 
 
SECONDARY REFINING UNIT "LADLE FURNACE"
     
 

  Ladle furnace unitis equipped with casting ladles of two standard sizes: 60, 90 tons enabling to perform secondary refining of 88 tons of steel and to cast forging ingots with weight up to 170 tons. During secondary refining process the chemical composition is corrected, the metal is heated and treated with flux core wire by using wire feeder, and with argon blow, that reduces nonmetallic inclusions and gase content in metal.

  • Nonmetallics content in steel after secondary refining
    		•  - up to 20 ppm;
  • Sulphur content
    		•  - up to 0,005%;
  • temperature difference of steel across the ladle section
    		•  - max 5°C;
  • homogeneous chemical composition of metal is provided through the whole volume of ladle.
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    STEEL DEGASSING UNIT
         
        Metal treatment in vacuum vessels enables to realize vacuum casting of the ingots weighing between 21 and 170 tons.

      Vacuum vessel No 4 is equipped with argon, oxygen, nitrogen feed system; wire feeders for steel inoculation with powdered materials; rolling cover with video control system; water-cooled oxygen lance; sampling device for steel chemical composition examination, gas content and metal temperature measurement in vacuum.

     This equipment enables to realize steel treatment according to VD and VOD patterns. By means of VOD technology the high-chromium steel is obtained with carbon content <0,03%. For steel vacuum treatment in the ladle (VD pattern) the unified sliding gate ladles stock of the Ladle Furnace Unit is used (60, 90 t capacity).

      Content of gases after vacuum metal degassing is as follows:

  • oxygen (Î2)
    		•  - 15..35 ppm
  • hydrogen (Í2)
    		•  - < 1,5 ppm
  • nitrogen (N2)
    		•  - 40..80 ppm 

     Steel quality level is in conformity with high international standards.
       
     
         
    MANUFACTURING SCHEME OF HIGH QUALITY STEEL PRODUCTION