<font style="font face=Verdana" face="Verdana" size="2"> <h1>The Coming of Blast Furnace</h1> <p>The <b>iron making process in India</b> took a new shape with the introduction of <b>blast furnace in 1911</b> at the Tata Steel plant.</p> <p><b>Industrial Blast Furnace</b>, the first of its kind in India came into operation at Tata Steel.</p> <p>The <b>&#8220;A&#8221; Blast Furnace</b> was blown in on 2<sup>nd</sup> December 1911</p> <p>Subsequent categories of Blast Furnaces were added in the later years&#8230;</p> <ul> <li>The &#8220;B&#8221; Blast Furnace in 1912</li> <li>the &#8220;E&#8221; Blast Furnace in 1919</li> <li>and the &#8220;C&#8221; and &#8220;D&#8221; Furnaces thereafter.</li> </ul> <p>Initially hand picked lump size raw ore, raw flux and coke made from 100% prime coking coal from Jharia were being used</p> <p>After the late 40&#8217;s, the use of medium coking coal began and utilisation of prime coking coal came down to 40-55%</p> <p><b>&#8220;F&#8221; Blast Furnace</b> was commissioned on 10<sup>th</sup> October 1958 and remained the Company&#8217;s largest Furnace till &#8220;G&#8221; Furnace was started in 1992</p> <p><b>PCI (Pulverized Coal Injection)</b> at &#8220;F&#8221; Furnace was introduced in 1991 while both &#8220;D&#8221; and &#8220;G&#8221; Furnaces adopted this technology in 1994.</p> <p>In-house development of <b>coal tar injection technology</b> was introduced in 1996 and <b>tar injection was commissioned in &#8220;A&#8221;, &#8220;B&#8221;, &#8220;C&#8221; and &#8220;E&#8221; Furnaces</b></p> <p>The <b>modernisation of the &#8220;F&#8221; Blast Furnace</b> took place in the year 2002 and its capacity was increased from <b>0.6 to 1.0 MTPA</b></p> <p>Construction of the &#8220;G&#8221; Blast Furnace began on 22<sup>nd</sup> December 1989 and was blown in on 18<sup>th</sup> November 1992</p> <p>Newer features like <b>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</b> were introduced. </p> <p>Introduction of <b>torpedo ladle</b> started in 1994 to deliver the hot metal at higher temperatures to steel making shops</p> <p>In the year 2002 <b>Multi Point Vertical Probe</b>, under Burden Probe and <b>Tuyere Probe</b> were installed at the &#8220;G&#8221; Blast Furnace. </p> <p>&#8220;G&#8221; Blast Furnace was rebuilt in 2005 and its capacity was changed from <b>1.0 MTPA to 1.8 MTPA</b></p> <p>Tata Steel envisages the construction of a new category of Blast Furnace in the year 2008 &#8211; <b>the &#8220;H&#8221; Blast Furnace</b> having a capacity of 2.5 MTPA</p> <p><i><b>The saga of modernisation and improvisation of the steel making process continues&#8230;</b></i></p> <p><i><b>Many many more milestones are to be achieved in the future&#8230;</b></i></p> </font>