ORALS

SESSION: IronThuPM1-R8	Usui International Symposium on Advanced Sustainable Iron and Steel Making (7th Intl. Symp. on Advanced Sustainable Iron and Steel Making)
Thu Oct, 24 2019 / Room: Ambrosia B (77/RF)
Session Chairs: Jose Adilson de Castro; Basant Kumar Singh; Session Monitor: TBA

15:15: [IronThuPM108] Keynote
Reduction of Material and Utilities Consumption by optimization of the usage at I- Blast Furnace
Padma Pal¹ ; Basant Kumar Singh¹ ; Bhaskar Ramdasu¹ ; Dhiren Patnaik² ; Vishwakarma Raj Kumar³ ; G.s.r. Murthy .³ ; Singh Anil Kumar⁴ ; ¹Tata Steel, Jamshedpur, India; ²Tata Steel Ltd., JAMSHEDPUR, India; ³Tata Steel Ltd., Jamshedpur, India; ⁴Tata Steel Ltd, Jamshedpur, India;
Paper Id: 221 [Abstract]

The rapid increase in world steel output during the last three decades has been accompanied by a growing geographical distribution of production, especially among developing countries. There have been tendencies towards both larger and more efficient units for achieving high production and less environmental impact. Currently, about 40% of steel is manufactured from recycled scrap, which uses only 15-20% of the energy needed to make steel from virgin ore. The cut throat competition from the electric furnaces and environmental norms is getting more stringent. The very sustenance of Blast Furnace is chiefly dependent on the level of optimized usage of available raw material. Apart from the regular raw materials, like coke, coal, iron bearing materials and fluxes, the blast furnaces also consume many utilities such as nitrogen, steam, water and consumables for safe and efficient operation. This paper elaborates the actions taken to reduce the raw materials, utilities and consumables, thereby saving over USD 30 M.

References:
1. Elsayed A. MOUSA, Alexander BABICH and Dieter SENK: ISIJ International, Vol. 51 (2011)\n2. Maarten Geerdes Hisko Toxopeus Cor van der Vliet; Modern Blast Furnace Ironmaking-an introduction; second edition 2009

SESSION: IronThuPM2-R8	Usui International Symposium on Advanced Sustainable Iron and Steel Making (7th Intl. Symp. on Advanced Sustainable Iron and Steel Making)
Thu Oct, 24 2019 / Room: Ambrosia B (77/RF)
Session Chairs: Moritoshi Mizutani; Shunsuke Hori; Session Monitor: TBA

15:55: [IronThuPM209]
Heat Loss Control in Stave Cooled Blast Furnace by Optimizing Gas Flow Pattern through Burden Distribution
Basant Kumar Singh¹ ; Bhaskar Ramdasu¹ ; Padma Pal¹ ; Dhiren Patnaik² ; G.s.r. Murthy .³ ; Vishwakarma Raj Kumar³ ; Kumar Lal Santosh³ ; Jaya Krishna P.³ ; ¹Tata Steel, Jamshedpur, India; ²Tata Steel Ltd., JAMSHEDPUR, India; ³Tata Steel Ltd., Jamshedpur, India;
Paper Id: 220 [Abstract]

The productivity of Blast Furnaces is largely impacted by fuel efficiency. Control of heat loss is one of the enabling parameters for achieving lower fuel rate. I-Blast Furnace is the latest and largest Blast Furnace of Tata Steel Jamshedpur with a working volume of 3230m³ and with rated capacity of 3.055 million tons per annum. Optimizing heat losses in Belly and Bosh zones remains a major challenge for blast furnace operators. The I-Blast furnace has installed Cast Iron & Copper Staves cooling members where copper staves are installed in Belly, Bosh & Lower Stack, whereas cast iron staves are installed in the upper stack area. Stave cooled Blast Furnaces are prone to higher heat losses in the Belly and Bosh regions with increase in coal injection rate as Bosh gas volume increases. Under these conditions, managing gas flow patterns through proper burden distribution, casting techniques, and maintenance of desired raw material qualities are of upmost importance for sustaining high injection rates. This study details the burden distribution control by the Ore & Coke ratio adjustment at the wall and center of the Blast Furnace as the coal injection rates increase from 140 kg/thm to 220 kg/thm. Control of blowing parameters, casting philosophy, specification for raw materials, and division of operational practices for controlling heat losses is also elaborated with the model that is used to visualize heat loss patterns in different zones of the Blast Furnace.

References:
1. Principles of blast furnace ironmaking: Theory and practice: A. K Biswas\n2. An Introduction to Modern Iron Making" by R. H. Tupkary and V. R. Tupkary