اثر عوامل مؤثر بر فرآیند تشکیل گندله آهن در دیسک‌های گندله‌سازی-رویکرد آزمایشگاهی

نوع مقاله : مقاله علمی

نویسندگان
1 گروه مهندسی مکانیک، دانشگاه فنی و حرفه ای، تهران، ایران
2 گروه مهندسی مکانیک، دانشگاه شهید باهنر کرمان، کرمان، ایران
3 گروه مهندسی مکانیک، دانشگاه شهید باهنر کرمان، کرمان، ایران.
4 مجتمع معدنی و صنعتی گل گهر، سیرجان، ایران
چکیده
در تحقیق حاضر با روش آزمایشگاهی اثر عوامل شیب و سرعت چرخشی دیسک گندله‌سازی و همچنین درصد رطوبت و بنتونیت بر کارآیی فرآیند تولید گندله مطالعه گردید. مقدار اندازه میانه (شاخص سایز) و عدد افتادن (شاخص استحکام) به‌عنوان ویژگی‌های اساسی گندله تولیدی در نظر گرفته شده است. با توجه به تعدد عوامل اثرگذار، فرآیند طراحی آزمایش با رویکرد سطح پاسخ نوع مرکب مرکزی اجرا و تعداد آزمایش‌های لازم و همچنین مقدار متغیرهای آنها تعیین گردید. برای رسیدن به توابع ریاضی صریح، برازش منحنی روی نتایج آزمایشات انجام و توابعی چهار متغیره برای دو ویژگی اندازه میانه و عدد افتادن بر حسب چهار عامل معرفی شده استخراج شد. برای پی بردن به جزئیات و نقش هر کدام از عوامل بر نتایج، نمودارهای لازم تهیه و علاوه بر مشخص شدن آثار هر کدام از آنها، تاثیر متقابل دوبه‌دو نیز بررسی گردید. با مشخص شدن نوع اثرگذاری هر پارامتر، در مورد دلایل و تفسیر فیزیکی آنها بحث گردید. در مجموع مشخص شد که برای دو فاکتور سرعت چرخش و شیب دیسک، محدوده بهینه‌ای وجود دارد که منجر به کسب گندله مطلوب از هر دو منظر اندازه و استحکام می‌گردد. بعلاوه، مشخص شد که رطوبت و بنتونیت در محدوده مورد بررسی لزوماً تاثیر هم‌زمان مثبت بر اندازه و استحکام محصول ندارند. نتایج تحقیق حاضر می‌تواند محدوده مناسبی از تنظیم عوامل موثر در تولید گندله را در اختیار قرار دهد که برای کارخانه‌های تولیدی این محصول مفید و کاربردی خواهد بود.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Studying effects of pelletizing process parameters on the main properties of iron ore green pellets-laboratory approach

نویسندگان English

Akbar Jafari 1
Mohamad Mahdi Arabi Parizi 2
Gholamhosein Baradaran 3
Mehdi Aziz Karimi 4
Ali Mehrabani 1
1 Department of Mechanical Engineering, Technical and Vocational University
2 Department of Mechanical Engineering, Faculty of Engineering, Shahid Bahonar University of Kerman, Kerman, Iran.
3 Department of Mechanical Engineering, Faculty of Engineering, Shahid Bahonar University of Kerman, Kerman, Iran.
4 Iran
چکیده English

In the present research, effect of pelletizing disk angle and rotation speed, as well as the percentage of moisture and bentonite on the median size (pellets size distrinution index) and the mean drop number (pellets strength index) are studied experimentally. Design of experiment approach is applied  leading to obtain reasonable number of experimens with specific settings.  To achive parametric  mathematical functions, curve fitting is performed on the experimental results and four-variable functions were developed for the two characteristics of median size and drop number. In order to reveal the details and the role of each factor on the results, the necessary contour graphs are prepared.  Based on the observed influences of each parameter on the pellets characteristics, the probable reasons and their physical interpretation were discussed. It was found that there are soptimal settings for the two factors of rotation speed and disc inclination, leading to obtaine the desired pellet from both the size and strength perspectives. In addition, it was found that in the studied range, the moisture and bentonite do not necessarily have a positive effect on both pellets size and strength concurrently. The results of the present research can be usefull for pellet production plants as assist to arrive optimall settings of the production process.

کلیدواژه‌ها English

Iron production
Pelletizing disk
Bentonite
Moisture
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  • تاریخ دریافت 18 دی 1402
  • تاریخ بازنگری 09 خرداد 1403
  • تاریخ پذیرش 20 بهمن 1402
  • تاریخ اولین انتشار 20 بهمن 1402
  • تاریخ انتشار 01 بهمن 1402