مهندسی متالورژی

مهندسی متالورژی

بررسی امکان استفاده از بریکت حاوی ریزدانه گندله و لجن احیایی در راکتور احیا مستقیم

نوع مقاله : مقاله پژوهشی

نویسندگان
1 کارشناس ارشد فرآوری مواد معدنی، امور تحقیق و توسعه، شرکت توسعه آهن و فولاد گل گهر، سیرجان، ایران.
2 دانشیار، بخش مهندسی شیمی، دانشگاه شهید باهنر کرمان، کرمان، ایران.
چکیده
در کارخانه تولید آهن اسفنجی، دو محصول احیاء نشده جانبی در طی فرایند تولید، تحت عنوان ریزدانه گندله و لجن احیائی، تولید می­شود. در این تحقیق امکان کلوخه کردن این مواد و شارژ مستقیم آنها در کوره صنعتی احیاء مستقیم،  به همراه خوراک ورودی، بررسی شده است. مواد پسماند فوق با استفاده از دستگاه بریکت ساز، تحت فشار 300 بار، به کلوخه های بزرگتر از 3/6 میلی متر (یک چهارم اینچ) تبدیل و احیاء شوندگی و استحکام آنها در عبور از راکتور احیاء مورد آزمایش قرار گرفت. بررسی ها نشان داد کلوخه های تولید شده استحکام کمی برای تحمل تنش های وارده در کوره را دارند. استفاده از محلول سیلیکات سدیم به میزان25/1 تا 5 درصد وزنی، بعنوان چسب در مواد کلوخه شده، باعث شد که استحکام نمونه ها، به منظور جلوگیری از خرد شوندگی، تا میزان 40 برابر افزایش یابد. برای افزایش آهن کل نمونه ها و رساندن آن به میزان استاندارد، 15 تا 20 درصد پودر آهن اسفنجی به کلوخه ها اضافه شد. با این افزایش درصد آهن کل کلوخه ها، به طور متوسط از 84 به 88 درصد افزایش یافت.
کلیدواژه‌ها

عنوان مقاله English

Investigating possibility of using briquettes containing fine of pellets and reduction sludge in a direct reduction reactor

نویسندگان English

saeid habibi nezhad 1
M. Mehdi Afsahi 2
1 Master of Mineral Processing, Research and Development Affairs, Gol Gohar Iron and Steel Development Company, Sirjan, Iran.
2 Associate Professor, Department of Chemical Engineering, Shahid Bahonar University of Kerman, Kerman, Iran.
چکیده English

Two unconverted by-products, fine of pellets and reducing sludge, are produced during processing in sponge iron production Companies. In the present research, possibility of the by products briquetting and also direct charge, along with the reactor feed, into the reduction furnace have been investigated. The mentioned byproducts were changed to the briquettes with more than 6.3 mm size (quarter inch) by briquetting jack machine under 300 bar pressure, and their reducibility and strength were tested during passage from the reduction reactor. Experiments showed, the produced briquettes had a low strength to tolerate inserted stresses during moving in the furnace. Using sodium silicate solution (1.25-5 weight percent) as a binder in the composition of the briquettes, to prevent crushing, increased their strength more than 40 times. To increase total Fe of the samples and reaching a standard level, 15-20% sponge iron  powder was added into the briquettes, increased total iron from 84% to 88% averagely.

کلیدواژه‌ها English

Briquette
Fine of pellets
Reducing sludge
Iron oxide
Reduction
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  • تاریخ دریافت 11 مهر 1401
  • تاریخ بازنگری 28 مرداد 1402
  • تاریخ پذیرش 29 مرداد 1402