|
|
|
| A MATHEMATIC MODEL FOR REDUCTION OF IRON ORE IN MOVING BED |
| XIE Yongkun; QIN Minsheng (Beijing University of Iron and Steel Technology)(Manuscript received 9 January; 1983; revised manuscript 7 February; 1984) |
|
Cite this article:
XIE Yongkun; QIN Minsheng (Beijing University of Iron and Steel Technology)(Manuscript received 9 January; 1983; revised manuscript 7 February; 1984). A MATHEMATIC MODEL FOR REDUCTION OF IRON ORE IN MOVING BED. Acta Metall Sin, 1984, 20(5): 375-386.
|
|
|
Abstract A one-dimensional mathematic model was developed for describing a moving bed reactor in which theiron oxide pellets are reduced to metallic iron with hydrogen and/or CO in a counter-current flow arrangement. The model uses the "three-interface shrinking core model" as the expression of single-pellet reaction kinetics. The model consists of the reaction rate equations of iron oxides and the heat and mass balance equations for both of the gas and the solid streams. The model shows the longitudinal distribution of the process variables such as degree of pellets reduction, and composition, pressure as well as temperature of the gas stream. For the purpose of investigating the reduction process of pellets in a moving bed and checking the correctness of the model, a bench-scale moving bed reactor was established. The experiments were carried out until the steady state was reached. The calculating results based on the model show reasonable agreement with the experimental measuements. The model cart be used for describing an industrial shaft furnace, and shows a difference characteristic between the reduction process of iron ore in a shaft furnace and the reduction process of iron ore under fixed conditions in laboratory.
|
|
Received: 18 May 1984
|
1 Spitzer, R. H. ; Manning, F. S. ; Philbrook, W. O. , Trans. Metall. Soc. AIME, 242 (1968) , 618．
2 Yanagiya, T. ; Yagi, J. ; Omori, Y. , Ironmaking Steelmaking, 6 (1979) , №3, 93．
3 Yagi, J. ; Szekely, J. , Trans. Iron Steel Inst. Jpn, 17 (1977) , 569．
4 鞭巌;森山昭著,冶金反应工程学,蔡志鹏;谢裕生译,科学出版社,1981,p.305．
5 原行明;橋爪利夫;石川英毅;相田晴美著,铁矿石直接还原,张炳怀;应永铭译,科学技术文献出版社重庆分社,1979,p.40．
6 Strassburger, J. H. , Blast Furnace-Theory and Practice, Gordon and Brcach Science Publ. , New York, 1969, p. 857．
7 McKewan, W. M. , Trans. Metall. Soc. AIME, 224 (1962) , 2, 387．
8 Quets, J. M. ; Wadsworth, M. E. ; Lewis, J. R. , Trans. Metall. Soc. AIME, 221 (1961) , 1186．
9 Rao, Y. K. ; Jalan, B. P. , Metall. Trans. , 3 (1972) , 2456．
10 Luiz, Martins, Final Public Oral Examination for the Degree of Doctor of Philosophy, 1981． (未发表).
11 火法冶金过程的物理化学,蒋导江;黄希祜译,高等教育出版社,1958,p.508．
12 秦民生,北京钢铁学院学报,(1981) ,№3,106．
13 McKewan, W. M. , Trans. Metall. Soc. AIME, 218 (1960) , 2．
14 Themelis N. J. ; Gauvin, W. H. , Trans. Metall. Soc. AIME, 227 (1963) , 290．
15 Geiger, G. H. ; Poirier, D. R. , 冶金中的传热传质现象,俞景禄;魏季和译,冶金工业出版社,1981,p.463．
16 Towhidi, N. ; Szekely, J. , Ironmaking Steelmaking, 8 (1981) , 237．
17 Szekely, J. ; Ei-Tawil, Y. , Metall. Trans. , B, 7B (1976) , 490． |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
