Process Equipments

SMS — Casting — Hot Processing — Cold Finishing

Steel Melting Shop

All steels are melted and refined in the SMS equipped with EAF-LRF-VD/VOD and cast in Ingot Moulds and CC Bloom Casters.

Electric Arc Furnace: RMGL has a 35 MT capacity Ultra High Power, Eccentric Bottom Tapping Arc Furnace for
melting steel from select raw materials viz. Scrap, DRI, Pig Iron, etc.

Secondary Refining Facilities

Ladle Refining Furnace (LRF)has been provided for maintaining narrow tolerance of Carbon, Manganese and other alloying elements

Argon purging done in LRF eliminates macro inclusions. Close Stream casting is done (without steel coming in contact with air) to have steel with minimum gas levels.

Vacuum Degassing (VD) has been provided to further reduce the hydrogen and other gas levels in steel to meet all critical specifications.

Vacuum Oxygen Decarburisation (VOD) Vessel has been provided to achieve low carbon levels in stainless steels.

Casting Facilities

Uphill bottom pouring in wide end up Ingot Moulds with liquid stream shrouding (without steel coming in contact with air) to ensure minimum gas levels, maximum cleanliness and high reduction ratios.

A twin strand INDOMAG Continuous Bloom Casting Machine with a 10.5 mtr / 21 mtr radius equipped with

  • Electro Magnetic Stirrer in bloom caster generates a whirlpool motion of liquid metal during solidification in copper mould. After chill zone, formation of columnar Zone is avoided and equiaxed grain formation takes place.
  • Automatic Mould Level Controller has been provided to keep constant head and constant speed of casting, working in tandem, this gives a Central shrinkage free casting.
  • Secondary cooling apron has been provided with air-water cloud spray, which results into atomization of water particles. The heat removal from cast bloom is accelerated and cast blooms produced are free from banded structure
The cast steel is then hot rolled giving specified/required reduction ratio to form steel of high quality suitable for critical applications.

 

 

 

 

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Hot Processing of Steel

Down-stream facilities for hot processing of steel comprises of:

1. Hot Rolling Mills for steel bars, billets and blooms with a capacity of 100,000 tpy equipped with:

  • One CENTRO-MASKIN bloom (250-600mm) grinding machine.
  • One 25 tph walking hearth reheating furnace.
  • One DEMAG-SIDERNAVAL 750mm 2-hi reversing blooming mill with roller-table, manipulator, tilter, etc, on both feed & finish sides.
  • One 550mm 3-hi intermediate mill, after the blooming mill.
  • One 550mm 2-hi non reversible finishing mill.
  • Hot Shear, Hot saw, cooling bed, roll shop, portable spectrometer, auxiliary systems, etc.

2. Seamless Tube/Pipe Plant with an installed capacity of 50,000 tpy and a size range of 33mm to 168mm O.D. equipped with:

  • One 16 tph rotary hearth furnace
  • One 5 tph Induction bloom heater
  • One 2500t Vertical, Hydraulic Hot Extrusion press
  • One 15 tph walking beam tube reheating furnace
  • One 18 strand Stretch Reduction Mill (SRM)
  • One roller hearth type spheroidized-annealing furnace.
  • Straightening, ID & OD peeling, End Chamfer and facing machines, Hydrostatic, UST, and eddy current testers, etc.

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Cold Finishing


Further down-stream for cold finishing we have Bar and Tube OD and ID peeling machines and Cold Pilger-machines for cold reducing of seamless tubes, Roller hearth furnace for spheroidized-annealing, annealing, normalizing and stress releaving and surface treatment plant for tubes.

RMGL is equipped with modern testing facilities employed right from steel making stage and inspection facilities like Magnetic Particle Inspection, Eddy Current Testing, Ultrasonic Testing, etc.

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