JP Journal of Heat and Mass Transfer
Volume 2, Issue 2, Pages 149 - 164
(June 2008)
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NUMERICAL PREDICTION PERTINENT TO COOLING GAS EFFECT ON TOTAL CARBON FORMATION AND PRODUCT TEMPERATURE IN SPONGE IRON REACTOR COOLING ZONE
Bayu Alamsari (Japan), Azis Trianto (Indonesia), Yazid Bindar (Indonesia) and Shuichi Torii (Japan)
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Abstract: In this work, sponge iron reactor cooling zone is simulated. Simultaneous mass and energy balances along the reactor lead to a set of ordinary differential equations which includes kinetic equations. Iron carbide and carbon deposit formation reactions are taken into account. After being validated with the plant data, the model is able to describe satisfactorily temperature and concentration profiles along cooling zone. From this study, it is found that the decrease of methane concentration due to iron carbide and free carbon formation occurred when solid temperature reached at 450°C and 506°C, respectively. Increasing cooling gas flow rate would increase total carbon formation and decrease product temperature. In addition, simulation results showed that the cooling gas flow rate above 68000 NCMH was not permitted due to total carbon content and temperature minimum approach limitation. |
Keywords and phrases: numerical simulation, sponge iron reactor, cooling zone, free carbon formation, iron carbide formation. |
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