Dissolution Characteristics of CO2-Treated Fluxed Pellets in Hot Metal Bath

Pal, J and Ghorai, S and Singh, D P and Goswami, M C and Bandopadhyay, D and Ghosh, Dinabandhu (2011) Dissolution Characteristics of CO2-Treated Fluxed Pellets in Hot Metal Bath. Mineral Processing and Extractive Metallurgy Review , 32 (4). pp. 229-246.

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Lump lime and iron ore are generally used in the basic oxygen furnace as flux and cooling material, respectively. Owing to high melting point, poor dissolution property, fines generation tendency, and hygroscopic nature of lump lime, delay in process and operational complexities are generally encountered. On the other hand, iron ore charging creates slag foaming. In order to alleviate the above problems and to utilize waste materials, fluxed lime–iron oxide pellets (FLIP) containing waste iron oxides and lime fines (10%–40%) were prepared and subsequently strengthened with CO2 gas treatment. FLIP may have the potential to partially replace scrap and lump lime in the conventional basic oxygen furnace charge. In order to assess the applicability of FLIP in steelmaking, the dissolution characteristics of these pellets were studied in a high-temperature pot furnace equipped with a charge-coupled device (CCD) camera under varying experimental conditions. It was found that the dissolution time decreased with increasing hot metal temperature, increasing specific surface area of the pellet, and decreasing lime content of the pellet. The melting of the pellet in the absence of hot metal took much higher time than its presence.

Item Type:Article
Official URL/DOI:DOI: 10.1080/08827508.2010.530717
Uncontrolled Keywords:CO2-treated fluxed pellet, dissolution, hot metal bath, slag formation
Divisions:Metal Extraction and Forming
ID Code:4320
Deposited By:Dr. J Pal
Deposited On:28 Nov 2011 15:47
Last Modified:28 Nov 2011 15:47
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