Abstract




 
   

IJE TRANSACTIONS A: Basics Vol. 28, No. 4 (April 2015) 593-598   

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  A NEW PROCEDURE OF IMPACT WEAREVALUATION OF MILL LINER (RESEARCH NOTE)
 
M. Akhondizadeh Korrani, M. Fooladi Mahani, M. Rezaeizadeh and S. H. Mansouri
 
( Received: July 24, 2014 – Accepted: January 29, 2015 )
 
 

Abstract    The significant costs insert on mineral processes due to mill liner wear including the labor costs, price of material and shut down periods. Therefore, the study of this phenomenon is economically important to optimize the mill operating conditions and liner profile design to decrease the wear rate. There is no appropriate and applicable research on impact wear evaluation of mill liners. In the present work, a procedure is presented for evaluation of impact wear of mill liners. A test machine is used to do impact wear experiments in different conditions of ball size, velocity and impact angle. A single relation of wear evaluation can be extracted of the experimental data. This relation is used to evaluate the liner wear due to impacts. The procedure is validated by measured liner wear of a laboratory mill. A plate is positioned in front of the cataract regime to eliminate it and enable us to measure the abrasion and impact wear separately. The comparisons show the acceptable accordance of evaluated and measured data so the liner wear of an operating mill can be evaluated by the procedure. The operating mill is in Sarcheshmeh copper complex in Iran. These studies helps us to have appropriate liner designs in order to postpone the liner wear and shut down periods as long as maintaining the mill performance.

 

Keywords    Liner wear, impact, case study, laboratory mill

 

چکیده    سایش لاینرهای آسیاب هزینه های زیادی بر بر پروسه هاس فرآوری معدنی تحمیل می کند که شامل هزینه نیروی انسانی، هزینه خریداری لاینر و هزینه توقف تولید است. بنابراین مطالعه این فرآیند جهت بهینه سازی عملکرد آسیاب و طراحی لاینردر جهت کاهش نرخ سایشبسیار اقتصادی است. تحقیق مناسب و کاربردی در زمینه سایش ضربه ای لاینر آسیاب انجام نشده است. در کار حاضر روشی برای محاسبه سایش ضربه ای لاینر ارائه شده است. یک دستگاه آزمایشی برای انجام آزمایشات سایش ساخته شده که قادر به انجام آزمایشات سایش ضربه ای در شرایط مختلف اندازه گلوله، سرعت و زاویه برخورد است. یک معادله محاسبه سایش، برگرفته از داده های آزمایشی استخراج می شود. این معادله برای محاسبه سایش لاینرها مورد استفاده قرار می گیرد. این روش با اندازه گیری و مقایسه سایش لاینرهای یک آسیاب آزمایشگاهی اعتبارسنجی می شود. صفحه ای در برابر جریان آبشاری درون آسیاب تعبیه می شود که جریان آبشاری را مانع شده و امکان اندازه گیری سایش ضربه ای و سایش اصطکاکی را بطور جداگانه فراهم می کند. از آنجا که نتایج محاسبه شده و اندازه گیری شده انطباق قابل قبولی دارند از این روش برای محاسبه سایش ضربه ای لاینر آسیاب واقعی در مجتمع مس سرچشمه استفاده می شود. این روش به بهینه سازی طراحی لاینر جهت به تعویق انداختن سایش و دوره های توقف آسیاب همزمان با حفظ عملکرد مناسب آسیاب کمک خواهد کرد.

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