 |
|
||||||||
 |
|||||||||
|
|||||||||
|
|
 |
|
|
 |
|
|
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||
|
|
|
Specifications |
|
|
MELT SHOP General The Melt Shop was idled in September 2003 and has since then been mothballed. Prior to cessation of production the melt shop produced the following types of Stainless Speciality Steels. Austenitic Super Austenitic Ferritic Precipitation hardening grades Duplex Heat Resistant Free Machining Steels Sulphur Alloyed Calcium Treated The above mentioned grades were produced as slabs, blooms, billets and ingots (not all grades in all formats). Typical applications of the end products could be found in Engineering, Fabrication, Automotive, Aerospace and Nuclear industries. The Melt shop contains the following main equipment: EAF with Scrap Pre-Heater CLU Converter Ladle Metallurgical Station Continuous Caster Ingot Teeming Station Specification Electric Arc Furance Installed : 1971 Supplier : ASEA Revamped : Hydraulics and Electrode Arms ( Conventional Type) Water Cooled Panels and Roof Control System (Level 1 and 2) Furnace Platform and Shell Transformer Heat Size : 80 Ton Furnace Shell : Spout Type, Diameter 5.8m Transformer : 80 MVA (ABB) Primary Voltage : 20/33 Kv (Primary Windings for 20 or 33Kv) Secondary Voltage : 624-513-408V Tap-Changer : On Load Type, 16 Positions Lime and Dolomite : Injection via Roof Alloy addition : Mainly FeSi for Reduction, by means of Fork-Lift with Charging Device. Alloys Battery : Shared with CLU Converter Panels and Roof : Water Cooled Scrap Pre-Heater : 2 Positions, using Furnace Off-Gas Automation : Level 1 and 2 (meltdown control) CLU Converter Installed : 1973 Supplier : Uddeholm Technology Revamped : Gas Control Station Larger Converter Vessels New Trunnion Control System (Level 1 and 2) Lime and Dolomite Addition Process Gases : Steam, O2, N2, Ar and Oil Free Compressed Air Tuyeres : 4 Bottom Tuyeres Max. Gasflowrate : 100 Nm3/min Heat Size : 80 Ton Alloy Addition : OH-Crane and Chute Alloys Battery : Alloys and Cooling Additions (Shared with EAF) 16 Bins for Alloys +2 For Lime and Weighing System Lime and Dolomite : Roof Hopper Energy Recovery : Off-Gas Steam Boiler Automation : Level 1 and 2 Ladle Metallurgical Station Installed : 1995 Manufacturer : Degerfors Stainless Maintenance Department Process Gases : Ar, N2 Stirring Method : Pouous Plug and Back Up Stirring Lance Alloy Additions : Alloys Battery with 12 +1 bins and Belt Transport System 4-Strand Wire Feeder Ladle Handling : Ladle Car No.1 Roof : Refractory Lined with Fume Evacuation Automation : Level 1 and 2 Continuous Caster Installed : 1980 Supplier : Voest Alpine Revamped : Cutting Torches Control System (level 1 and 2) Mould Level Control System (NKK) Billet Moulds and Mould Level Control (Berthold) Radius : 9 m Max.Met. Length : 18 m Tundish : 10 ton Casting Speed : 0.4-2.5 m/min Mould Level Control : Billets (co-60 (Berthold) Blooms and Slabs Inductive (NKK) Blooms : 300x 400 265x 300 265x 450 300x 450 Billets : 140x 140 150x150 Slabs : 150x 800-1580 200x 800-1580 300x 1600 Ingot Casting Moulds : 2.5 Ton Ingot for Rolling and 8 Ton Forging Ingot. No. 30 of 2.5 Ton Moulds, 5 Sprue Plates and 5 Risers. No.8 of 8 Ton Moulds, 5 Sprue Plates and 4 Risers | |
