رزانی, ., معصومی, ., رضایی زاده, ., نوع پرست, . (2016). New laboratory scale Grinding method to predict energy and the feed grindability of mill of Sarcheshmeh Copper Complex. Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 9(4), 771-780.
محمد رزانی; ابوالفضل معصومی; مسعود رضایی زاده; محمد نوع پرست. "New laboratory scale Grinding method to predict energy and the feed grindability of mill of Sarcheshmeh Copper Complex". Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 9, 4, 2016, 771-780.
رزانی, ., معصومی, ., رضایی زاده, ., نوع پرست, . (2016). 'New laboratory scale Grinding method to predict energy and the feed grindability of mill of Sarcheshmeh Copper Complex', Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 9(4), pp. 771-780.
رزانی, ., معصومی, ., رضایی زاده, ., نوع پرست, . New laboratory scale Grinding method to predict energy and the feed grindability of mill of Sarcheshmeh Copper Complex. Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 2016; 9(4): 771-780.
New laboratory scale Grinding method to predict energy and the feed grindability of mill of Sarcheshmeh Copper Complex
1عضو هیات علمی دانشگاه کار- دانشجویی دکتری مکانیک دانشگاه تهران
2عضو هیئت علمی دانشکده مهندسی مکانیک دانشگاه تهران
3عضو هیئت علمی بخش مکانیک دانشگاه تحصیلات تکمیلی و فن آوری پیشرفته کرمان
4عضو هیئت علمی دانشکده معدن دانشگاه تهران
Abstract
One of the factors which are usually difficult to be measured in mills is the grindability and distribution of feed under real situation and in a short time. In the condition of achieving a fast and convenient way to determine these parameters, the proper relationship between energy, hardness and particle size distribution can be obtained. Feed hardness is one of the most important factors in grinding of minerals in mineral-processing process, and this parameter depends on factors, such as the mechanical properties of minerals and collision conditions. The efficient use of energy during grinding of minerals in mills is one of the main objectives of this research. This research tried to provide an experimental method based on real collision conditions in a mill. Nowadays, SAG design test is used for evaluation of grinding circuit in the time of change in feed particle size distribution, size of the ball and the speed of mill, and for the prediction of energy required for complete grinding in AG and SAG mills. In this study, a new SAG design test for measuring the amount of specific energy and feed grindability was suggested and the effect of various parameters on product size distribution and hardness results was assessed. Results show the deviation of the A×b estimated by new method with values of drop weight tests were less than 1.9 percent. This new model can also be used to accurately predict the specific energy and particle size distribution..
ارائه آزمون آزمایشگاهی جدید برای تعیین انرژی و قابلیت خردایش خوراک آسیای مجتمع مس سرچشمه
Abstract [Persian]
از جمله عواملی که معمولا در آسیاها اندازه‌گیری آن دشوار می‌باشد، تعیین قابلیت خردایش خوراک و توزیع ابعاد به صورت واقعی و در زمان کوتاه است. در صورت دستیابی به راه حلی سریع و مناسب جهت تعیین این پارامترها می‌توان رابطه‌ای مناسب بین انرژی و سختی و دانه‌بندی پیدا نمود. سختی خوراک یکی از عوامل بسیار موثر در خردایش مواد معدنی در فرآیند فرآوری مواد معدنی می‌باشد و این پارامتر به عواملی نظیر خواص مکانیکی مواد معدنی و شرایط برخورد وابسته است. استفاده بهینه از انرژی جهت خردایش مواد معدنی در آسیاها از اهداف اصلی این تحقیق می‌باشد. در این تحقیق سعی بر این است که مدلی تجربی مبنی بر شرایط برخورد واقعی در آسیا ارائه گردد. امروزه از آزمون آسیای نیمه خودشکن آزمایشگاهی جهت بررسی شرایط مدار خردایش در زمان تغییر توزیع دانه بندی خوراک، اندازه گلوله و سرعت آسیا و تخمین انرژی لازم برای خردایش کامل در آسیای خودشکن و نیمه خودشکن، استفاده می‌شود. در این تحقیق یک آزمون آسیای نیمه خودشکن جدید جهت اندازه‌گیری انرژی و قابلیت خردایش خوراک، پیشنهاد شده و اثر پارامترهای مختلف بر دانه بندی و سختی خوراک بررسی شده است. نتایج نشان می‌دهد تفاوت عدد سختی (A×b) بدست آمده از روش پیشنهادی جدید و آزمون بار افتان استاندارد 9/1 درصد است. همچنین با استفاده از روش پیشنهادی جدید می‌توان انرژی لازم جهت خردایش و دانه‌بندی محصول را با دقت بالایی تخمین زد.
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