| 1. |
- Nurni, Viswanathan N., et al.
(författare)
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Heat, Mass, Momentum and Charge Transport
- 2024. - 2
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Ingår i: Treatise on Process Metallurgy. - : Elsevier. ; , s. 565-679
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 2. |
- Nurni, Viswanathan N., et al.
(författare)
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Model for reduction of iron oxide pellet with a C-O-H-N gas mixture considering water gas shift equilibrium in the gas while it diffuses through the product layer
- 2012
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Ingår i: XXVI International Mineral Processing Congress. - New Delhi : The Indian Institute of Metals. - 9788190171434 ; , s. 3921-3928
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Konferensbidrag (refereegranskat)abstract
- In metallurgical processes, a higher usage of hydrocarbons is encouraged to bring down carbon emissions. In this regard, numerous investigations on reduction of oxides by C-O-H-N gas mixture have been reported. Attempts to simulate these reduction processes using shrinking core model, one of the common models used for such studies, have under predicted the reduction rates. This is perhaps owing to the fact that the homogeneous reaction in the gas phase is not being considered. If the reaction temperatures are above 1000K, which is generally so for many reduction processes, the homogeneous gas reaction rates are expected to be so high that one can assume local equilibrium in the gas phase. In the present study, reduction of wustite in a C-O-H-N gas mixture has been modeled using a shrinking core model considering the water gas shift equilibrium in the gas while it diffuses through the product layer.
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| 3. |
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| 4. |
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| 5. |
- Abhale, P.B., et al.
(författare)
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Efficient simulation of gas flow in blast furnace
- 2009
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Ingår i: Computers, Materials and Continua. - 1546-2218 .- 1546-2226. ; 10:2, s. 195-216
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Tidskriftsartikel (refereegranskat)abstract
- Simulation of gas flow in a multilayered non-isothermal packed bed is useful for blast furnace operators in deciding appropriate charging strategy. While using an anisotropic form of Ergun equation to simulate gas flow through such systems, a new solution methodology for non-isothermal gas with varying density flowing through a layered burden has been proposed. This involves handling non-linearity due to gas density variation with pressure and temperature by solving for the square of pressure instead of pressure directly and handling the non-linearity due to vertical bar nu vertical bar term in the Ergun equation by solving linearized form of Ergun equation and updating vertical bar nu vertical bar iteratively. The proposed scheme is capable of predicting the effect of layer structure on gas flow with economy in number of grid points as well as computation time
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| 6. |
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| 7. |
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| 8. |
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| 9. |
- Ballal, N.B., et al.
(författare)
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Blast furnace modeling : gaps and challenges
- 2009
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Ingår i: International Conference on Advances in the Theory of Ironmaking and Steelmaking (ATIS 2009). - New Dehli : Allied Publishers Ltd. - 9788184245394 ; , s. 162-171
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Konferensbidrag (refereegranskat)
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| 10. |
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