<font style="font face=Verdana" face="Verdana" size="2"> <h1>Steelmaking with Steel Melting Shops</h1> <h3><u>Steel Melting Shop &#8211; 1</u></h3> <p>In the year 1911, <b>TISCO</b> installed its <b>first Steel Melting Shop.</b></p> <p>It had four <b>Open Hearth Furnaces</b> of 50 tonnes capacity</p> <p>Soon, the number of Open Hearth Furnaces increased from <b>four to eight</b> with capacities ranging from <b>70 to 130 tonnes</b></p> <h3><u>Steel Melting Shop &#8211; 2</u></h3> <p>The progress of Steelmaking in the TISCO plant necessitated more steel melting shops. This initiated the establishment of the <b>2<sup>nd</sup> S.M.S in 1928</b></p> <p><b>Duplex process</b> &#8211; a combination of two recognized <b>steelmaking processes</b> was adopted for the 2<sup>nd</sup> Steel Melting Shop</p> <p>The most popular of these combinations was <b>Acid Bessemer Converter</b> and<b> Basic Open Hearth Steelmaking Processes</b></p> <p>Features included <b>three Acid Bessemer Converters</b> of 25 tonnes capacity each, coupled with <b>three tilting Basic Open Hearth Furnaces</b></p> <p><b>With LD1 in operation, this shop was closed in 1983</b></p> <h3><u>Steel Melting Shop &#8211; 3</u></h3> <p><b>Steel Melting Shop &#8211; 3</b> was introduced in 1958 during the Two Million Tonne Programme (TMP) with an installed capacity of <b>85,000 tonnes of ingot steel per month</b></p> <p>At the beginning it had <b>seven Basic Open Hearth Furnaces</b></p> <p>Later on, the existing facility was spruced up by adding three more Acid Bessemer Converters of 32 tonnes capacity each and one Basic Open Hearth of 200 tonnes capacity</p> <p>This shop ceased to function from 1999</p> <h3><u>Modernisation with LD</u></h3> <p><b>LD 1</b></p> <p>The <b>modernization programme in Phase I</b> updated the steelmaking facilities and marks an important milestone in the history of the plant.</p> <p>The <b>Basic Oxygen Furnace</b> or the<b> LD Shop</b> was formally launched in 1983 with the commissioning of 1.1 million tonnes capacity.</p> <p>Main features included <b>two 130 tonnes basic oxygen converters with flux charging system, gas cleaning and gas recovery plant</b>. One six strands Continuous Casting Machine and another 130 tonne Vacuum Arc Degassing &amp; Refining (VADR) unit.</p> <p>In 1983, a six strand billet caster to make 340,000 TPA (rated capacity) of 100-130 mm<sup>2</sup> billet was commissioned. For the first time in an integrated steel plant in India, <b>a billet casting facility was put in LD1</b>.</p> <p>Later in 1997 &#8211; <b>a second billet caster</b> was provided in LD1 in the earlier part of the year. </p> <p><b>LD 2 </b></p> <p><b>Steelmaking Shop (LD2)</b> came into operation in the year 1993(under Modernization Phase III &#8211; 1990-94) with production capacity of 1.3 MTPA. The shop initially had two converters of capacity 130 tonnes each; one more converter was added later on. </p> <p>In LD2, transfer of hot metal was through torpedo ladle. It has <b>Desulphurisation station, Ladle Furnace and RH Degasser.</b></p> <p>Two single strand slab casters were installed initially and a third one later. Each slab caster is provided with a turret so that sequence casting is possible.</p> <p><i><b>The process of evolution and improvement continues&#8230;<br> &#8230; striving to make the steelmaking process better and better each day.</b></i></p> </font>