The Coming of Blast Furnace
The iron making process in India took a new shape with the introduction of blast furnace in 1911 at the Tata Steel plant.
Industrial Blast Furnace, the first of its kind in India came into operation at Tata Steel.
The “A” Blast Furnace was blown in on 2nd December 1911
Subsequent categories of Blast Furnaces were added in the later years…
- The “B” Blast Furnace in 1912
- the “E” Blast Furnace in 1919
- and the “C” and “D” Furnaces thereafter.
Initially hand picked lump size raw ore, raw flux and coke made from 100% prime coking coal from Jharia were being used
After the late 40’s, the use of medium coking coal began and utilisation of prime coking coal came down to 40-55%
“F” Blast Furnace was commissioned on 10th October 1958 and remained the Company’s largest Furnace till “G” Furnace was
started in 1992
PCI (Pulverized Coal Injection) at “F” Furnace was introduced in 1991 while both “D” and “G” Furnaces adopted this technology in 1994.
In-house development of coal tar injection technology was introduced in 1996 and tar injection was commissioned in “A”, “B”, “C” and “E” Furnaces
The modernisation of the “F” Blast Furnace took place in the year 2002 and its capacity was increased from 0.6 to 1.0 MTPA
Construction of the “G” Blast Furnace began on 22nd December 1989 and was blown in on 18th November 1992
Newer features like bell less top, belt conveyor charging, hot blast stove with external combustion chamber, cast house slag granulation, coal injection and torpedo ladles for hot metal transport were introduced.
Introduction of torpedo ladle started in 1994 to deliver the hot metal at higher temperatures to steel making shops
In the year 2002 Multi Point Vertical Probe, under Burden Probe and Tuyere Probe were installed at the “G” Blast Furnace.
“G” Blast Furnace was rebuilt in 2005 and its capacity was changed from 1.0 MTPA to 1.8 MTPA
Tata Steel envisages the construction of a new category of Blast Furnace in the year 2008 – the “H” Blast Furnace having a capacity of 2.5 MTPA
The saga of modernisation and improvisation of the steel making process continues…
Many many more milestones are to be achieved in the future…