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Iranian Journal of Materials Science and Engineering، جلد ۱۲، شماره ۳، صفحات ۶۶-۷۴
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عنوان انگلیسی THE EFFECT OF VOLATILE MATTER OF NON-COKING COAL ON THE REDUCTION OF IRON OXIDE AT NON-ISOTHERMAL CONDITION
چکیده انگلیسی مقاله The volatile matter of non-coking coal was used for the reduction of hematite in argon atmosphere at nonisothermal condition. A thermal gravimeter furnace enable to use an 80 mm-height crucible was designed for the experiments to measure the weight changes of about 10 grams samples. A two-layered array of coal and alumina and four-layered array of iron oxide, alumina, coal and alumina was used for the devolatilization and reduction experiments, respectively. The net effect of volatile reduction of Fe 2O3was determined and it was observe that 45% reduction has been achieved. Three distinct regions were recognized on the reduction curve. The reduction of hematite to magnetite could be completely distinguished from the two other regions on the reduction curve. At 600-950°C, the reduction was accelerated. 63% of volatile matter resulted in 25% of total reduction before 600°C while the remaining volatile matter contributed to 75% of the total reduction. From the reduction rate diagram, the stepwise reduction of the iron oxides could be concluded. The partial overlap of the reduction steps were identified through the XRD studies. The starting temperature of magnetite and wüstite reduction were determined at about 585°C and at 810°C, respectively.
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نویسندگان مقاله محمدحسین همتی | m h hemmati
department of metallurgical engineering, iron and steel research center, ferdowsi university of mashhad, iran.

سازمان اصلی تایید شده: دانشگاه فردوسی (Ferdowsi university)

j وحدتی خاکی | j vahdati khaki
department of metallurgical engineering, iron and steel research center, ferdowsi university of mashhad, iran.

سازمان اصلی تایید شده: دانشگاه فردوسی (Ferdowsi university)

a zabett | a. zabett
department of metallurgical engineering, ferdowsi university of mashhad, iran.

سازمان اصلی تایید شده: دانشگاه فردوسی (Ferdowsi university)

نشانی اینترنتی http://ijmse.iust.ac.ir/browse.php?a_code=A-10-127-96&slc_lang=en&sid=en
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کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده گروه مکانیکی و شکل دادن
نوع مقاله منتشر شده Research paper
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