مهدی قراباغی
دانشگاه تهران
[ 1 ] - بررسی جدایش ژرمانیوم از محلول آبی با استخراج حلالی و اثر سینرژیسم
ژرمانیوم یکی از مهم‌ترین عناصر در صنایع پیشرفته و صنایع الکترونیکی است که در سال‌های اخیر کاربردهای زیادی داشته است. در این مقاله مطالعات انجام شده با استفاده از تاثیر سینرژیسم دو حلال آلی لیکس 63 و D2EHPA برای جداسازی ژرمانیوم از محلول آبی ارایه می‌شود. با در نظر داشتن این نکته که روش هیدرومتالورژی از مهم‌ترین روش‌های استحصال این عنصر است، استخراج حلالی این عنصر بررسی شد و تاثیر نوع استخراج‌کن...
[ 2 ] - Investigation on life cycle assessment of lead and zinc production
Lead and zinc production is one of the main predisposing factors of excessive greenhouse gases emissions, air pollution and water consumption. In this paper, the environmental problems of lead and zinc production in Calcimin plant are expressed and life cycle assessment of this plant is assessed. The data regarding the amount of induced global warming and pollution, acidification, and depletion...
[ 3 ] - Effect of frother type and operational parameters on nano bubble flotation of quartz coarse particles
In this work, the effects of the types of frother (MIBC, pine oil, and A65) and operational parameters (impeller speed and air flow rate) on the flotation of quartz coarse particles was investigated using nano bubbles (NBs). Quartz particles of the size of -425+106 mm and three types of frother were used for the flotation experiments. Also the impeller speed was 600 to 1300 rpm, and the air flo...
[ 4 ] - Concentration and recycling of rare earth elements (REEs) from iron mine waste using a combination of physical separation methods
This study aims to investigate and optimize the effects of the main parameters including the particle size, gravity and magnetic separation combination, high gradient magnetic separation, magnetic field intensity, shaking table slope, washing water flow, and electrostatic separation upon the rare earth element (REE) recoveries from iron mine waste. The electron microprobe showed that high amoun...
[ 5 ] - Effect of grinding time on flotation recovery of copper smelting slags in Bardaskan district
Copper smelting slags are hard materials. Therefore,to recover their copper by flotation method, grinding should be carried out to obtain optimal particle size. Copper smelting slags in the Bardeskan district, with work index of 16.24 kwh/st, were grinded for 65 minutes to reach an acceptable degree of freedom for the flotation tests, with particle size of 80%, smaller than 70 μm. With this gri...
[ 6 ] - Solvent extraction and stripping of zinc from synthetic chloride solution in presence of manganese and cadmium as impurities
In this research work, solvent extraction and stripping of zinc ions from a Zn-Mn-Cd-bearing solution was investigated using D2EHPA as the extractant in a chloride medium. The efficiency of the extraction and stripping stages was evaluated separately, and different parameters such as the pH, extractant concentration, reaction temperature, and contact time were studied. Based on the results obta...
[ 7 ] - Effects of Flocculant, Surfactant, Coagulant, and Filter Aid on Efficiency of Filtration Processing of Copper Concentrate: Mechanism and Optimization
In the recent decades, water scarcity has become a major challenge for many reasons, especially the inadequate use of water resources. The mineral processing plant is among the most important water-consuming industries. Filtration, as one of the important processes in water recovery, is a process in which the solid-suspended particles are removed from the liquid. In the present work, the effect...
نویسندگان همکار
B. Rezai 1