التفاصيل البيبلوغرافية
| العنوان: |
Experimental Investigation and Computational Fluid Dynamics Simulation of the Magnetite Concentrate Reduction Using Methane-Oxygen Flame in a Laboratory Flash Reactor. |
| المؤلفون: |
Elzohiery, Mohamed, Fan, Deqiu, Mohassab, Yousef, Sohn, H. Y. |
| المصدر: |
Metallurgical & Materials Transactions. Part B; Jun2020, Vol. 51 Issue 3, p1003-1015, 13p |
| مصطلحات موضوعية: |
MAGNETITE, FLAME, NATURAL gas, FLUID flow, CHEMICAL reactions, COUNTERFLOWS (Fluid dynamics) |
| مستخلص: |
An experimental investigation of the reduction of magnetite concentrate particles was conducted in a laboratory-scale flash reactor representing a novel flash ironmaking process. In this reactor, methane was partially oxidized by oxygen to form a reducing H2 + CO gas mixtures. The test variables in this work included the particle residence time, the extent of excess reducing gases, particle feeding mode, and flame configuration. The experimental results obtained from this reactor proved that the concentrate particles can be reduced directly in a flash reactor utilizing natural gas. More than 80 pct reduction was achieved in this reactor despite its low operating temperature (1170 °C). In addition, a three-dimensional computational fluid dynamics model was developed to describe the reduction of concentrate particles in this reactor. The model was used to simulate the fluid flow, heat transfer, and chemical reactions involved. The gas phase was simulated in the Eulerian frame of reference, while the particles were tracked in the Lagrangian framework. The partial combustion of methane by oxygen was also simulated in this study. The temperature profile obtained from the simulations satisfactorily agreed with the experimental measurements, while the calculated reduction degrees consistently over predicted the experimental values. This was attributed to the soot formation as a consequence of methane cracking due to large metal surface of the reactor. The soot formation led to a high-water vapor generation in the partial combustion, which lowered the excess of hydrogen. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
