| Productivity Indices of Steel Melting Shop at Indian Iron and Steel Company Limited (1997-1998 to 2003-2004) | ||||||||
| Indices | Unit | 1997-98 | 1998-99 | 1999-2000 | 2000-01 | 2001-02 | 2002-03 | 2003-04 |
| Open Hearth Furnaces | ||||||||
| Overall availability per day | ||||||||
| 225 Tonne Furnaces (O.H.)* | ||||||||
| 2 x 110 Tonne Twin Hearth Fce | ||||||||
| Output per Heat | ||||||||
| 225 Tonne Furnaces (O.H.) | ||||||||
| 2 x 110 Tonne Twin Hearth Fce | ||||||||
| Average Heat Time | ||||||||
| 225 Tonne Furnaces (O.H.) | ||||||||
| Charge to Tap | ||||||||
| Tap to Tap (Gross) (O.H.) | ||||||||
| (T.H.) | ||||||||
| Yield from Metallic Charge to Net Steel (Overall) | ||||||||
| Average Life of Ingot Moulds | ||||||||
| Average Life of Open Hearth Roof | ||||||||
| Basic | ||||||||
| Average Roof Life-THF | ||||||||
