Hamid Khoshdast
Mining Engineering Department, Higher Education Complex of Zarand
[ 1 ] - A new method for determination of frothability of frothers by using water recovery measurement
A new method was introduced for frothing characterization of flotation frothers. Method uses water recovery to develop a new frothability index named water recovery index (WRI). New index was determined for some commercial frothers and results were compared with dynamic frothability index (DFI). Results showed that water recovery index values follow the order of A-65 13016 s/mol > DF-250 6292.4...
[ 2 ] - Effects of operating parameters on time-dependent ash entrainment behaviour of a sample coal flotation
It is well-known that entrainment of particles into the froth is a key factor in the selectivity and performance of the flotation process, especially for fine particle recovery. Since flotation is a continuous process, in this work, the effects of operating parameters on the entrainment of ash materials in a sample coal flotation is investigated from a time-sequence viewpoint. The effects of th...
[ 3 ] - A new chart-independent method for fast identification of control level of industrial processes using continuous data
A new method is developed for a fast identification of the stability situation of industrial processes. The proposed method includes two factor ratios of the control constants for the upper and lower control limits to process these constants. An indication ratio is then defined as the ratio of the maximum data range value to the difference between the maximum and average values for individual d...
[ 4 ] - A model for predicting dynamic frothability index of dual-frother blends
Dynamic frothability index (DFI) is a characteristic of any frother which presents useful information about frothing properties. The objective of this study is to introduce a prediction model for estimation of DFI value of dual-frother blends. Model uses the DFIs of frothers and mole ratio of weaker frother to calculate the blend’s DFI. The model reliability was confirmed by comparing the exper...
[ 5 ] - A parametric model for predicting cut point of hydraulic classifiers
A new parametric model was developed for predicting cut point of hydraulic classifiers. The model directly uses operating parameters including pulp flowrate, feed particle size characteristics, pulp solids content, solid density and particles retention time in the classification chamber and also covers uncontrollable errors using calibration constants. The model applicability was first verified...
[ 6 ] - ارائه الگویی برای آموزش مؤثر اخلاق مهندسی در دوره کارشناسی
آموزش مهندسان یک سیستم دو بعدی از تعلیم و تربیت است که نادیده گرفتن هر یک به ترتیب، به پرورش نیروی کار بهره¬وری مادی و معنوی منجر خواهد شد. بعد تربیتی آموزش، مهندس را قادر می¬سازد تا به بهترین نحو ارتباط بر قرار سازد، استدلال کند و بهترین تصمیمات را با در نظر گرفتن ضوابط اخلاقی و معنوی بگیرد؛ لذا، آموزش و مطالعه اخلاق مهندسی در قالب یک واحد درسی، دانش¬پژوهان را برای زندگی و آینده حرفه¬ای آماده...
[ 7 ] - بررسی کارآیی مدل Masliyah در پیشبینی حد جدایش کلاسیفایرهای هیدرولیکی با جریان قائم
در پژوهش حاضر، میزان کارآیی مدل تجربی Masliyah، در پیشبینی حد جدایش کلاسیفایرهای هیدرولیکی با جریان قائم بررسی شده است. کلاسیفایر مذکور طراحی و در آزمایشگاه فرآوری دانشگاه شهید باهنر نصب شده است. تأثیر دبی هیدرولیکی، توزیع دانهبندی، درصد جامد خوراک، زمان ماند و ابعاد کلاسیفایر بر خطای نسبی مدل، در قالب یک طرح فاکتوریلی کامل دو سطحی، بررسی شده است. نتایج نشان داد که توزیع دانهبندی و تأثیر متق...
[ 8 ] - Efficient Dye Removal from Aqueous Solutions Using Rhamnolipid Biosurfactants by Foam Flotation
Methylene blue was efficiently removed from aqueous solution by foam flotation using a rhamnolipid a biosurfactant as a dye collector. The effects of four parameters, namely, pH (1.5–11.5), frother concentration (5–65 ppm), aeration rate (2–6 L/min) and rhamnolipid to methylene blue weight ratio (0.5–6.5), on dye removal were studied and optimized using response surface methodology. Results...
[ 9 ] - Monitoring and Evaluation of Water Consumption in the Gohar-Zamin Iron Ore Complex (Sirjan) using Shewhart Control Charts
Background & objectives: One of the biggest concerns about the increasing development of the mining industries, especially in the dry and tropical regions, is their high water consumption and, consequently, the serious threat to the local water resources as well as the impacts of these industrieschr('39') pollution on the environment and other downstream water resources. Therefore, it is necess...
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