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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 51845 (07)
- University: Sharif University of Technology
- Department: Materials Science and Engineering
- Advisor(s): Ashuri, Hossein
- Abstract:
- Due to the increasing spread of metal industries and the need for raw material as feed for electric furnaces in order to produce cast iron and steel, as well as scrap deficiency and rising prices, the use of sponge iron as a substitute for scrap was considered in this project Therefore, in order to achieve the chemical analysis of the sorel ingot that is special for spherical graphite cast iron production with low manganese and chromium content, the direct reduction process was carried out using tunnel kiln method on low-manganese iron ore concentrate.After the investigation on direct reduction parameters including the saggers and coal grading,the produced sponge iron has melted in induction furnace and After several experiments, the Sorel ingot analysis has obtained. In order to compare the melting efficiency, the briquetting process of tunnel kiln sponge iron,Midrex sponge iron and chips has done with graphite together and produced briquettes have charged in to the induction furnace. The results of various experiments showed that briquetting helps to improve the melting efficiency, such as less graphite consumption, lower corrosion of the furnace wall and lower power consumption. Also, due to the high metallization degree of the tunnel kiln sponge iron in comparison with Midrex sponge iron, its melting efficiency was close to the melting efficiency of the chips briquettes
- Keywords:
- Sponge Iron ; Tunnel Kiln ; Midrex Method ; Induction Furnace ; Spherical Graphite Cast Iron
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