separation analysis of dry high intensity induced roll magnetic separator for concentration of hematite fines - sciencedirect
Separation of para-magnetic minerals by using dry magnetic separation techniqueConcentration of hematite fines from a low grade iron oreAnalysis on the effects of variables on particle separation in induced roll magnetic separatorStatistical analysis and modeling of induced roll magnetic separator
In this study, a three level BoxBehnken factorial design combined with response surface methodology was used for modeling and optimization of process parameters of induced roll dry high intensity magnetic separator. The influence of magnetic field intensity, roll speed and feed rate was analyzed for the separation of hematite minerals. Second-order response functions were produced for the grade and recovery of the hematite minerals in the magnetic fraction. Taking advantage of the quadratic programming, optimized levels of the process variables have been determined as optimum levels to achieve the maximum grade of 51.2% Fe, and maximum level of recovery was 97.8% Fe whereas minimum grade of 23.9% SiO2 in the magnetic product was predicted. Further optimization was carried out by targeting the Fe (%) content and recovery of the magnetic product of above 50%. The influence of the process variables of the induced roll high intensity magnetic separator on grade and recovery of the hematite mineral in the magnetic fraction were presented as 3D response surface graphs.
Separation of hematite fines was studied by using dry high intensity induced roll magnetic separator. In this study, modeling and optimization of process variables of IRMS was investigated to separate the hematite fines. A three-level BoxBehnken design combined with a response surface methodology (RSM) and quadratic programming (QP) was employed to understand the effect of variables on the separation of para-magnetic minerals.Download : Download full-size image
Mr. Sunil Kumar Tripathy is currently a researcher at the Research and Development Division of Tata Steel Ltd., Jamshedpur, India. He did his post-graduate in Mineral Processing from Gulbarga University, India in 2008 and is pursuing his Doctorate in Mineral Engineering at Indian School of Mines, Dhanbad. His main research area of interest is physical separation and fine particle processing. He has published 45 research papers in national and international journals as well as in conference proceedings. He is a recipient of several awards from professional bodies (Mineral Engineering Science Association, Indian Institute of Mineral Engineers) for his technical contribution to the field of mineral processing.
Dr. Pradip Kumar Banerjee works as a chief researcher at the Research and Development Division of Tata Steel Ltd., Jamshedpur. He obtained his Doctorate in Chemical Engineering from the Indian Institute of Technology, Kharagpur and is now in-charge of research areas covering raw material beneficiation, coke making and environment. He has several patents and more than 200 publications in international and national journals and proceeding volumes. He has received many awards and recognitions including the prestigious Coal Beneficiation Award 2008 from the Indian Institute of Mineral Engineers, India and the Metallurgist of the Year 2009 from the Ministry of Steel, Govt. of India.
Dr Nikkam Suresh is currently a Professor in the Department of Fuel & Mineral Engineering at the Indian School of Mines, Dhanbad. He obtained his doctorate from the same institute and has about 90 technical publications to his credit. He has contributed immensely to the field of Coal and Mineral Beneficiation. He is a recipient of several awards; to name a few, the National Mineral Award (received from the Ministry of Steel and Mines, Govt. of India), Coal Beneficiation Award (from IIME), Distinguished Teacher Award in 2002, and Dr R P Bhatnagar Award from MGMI in 1996. He is also a DAAD Fellow. Dr Suresh is a popular teacher among the students and is known for his noteworthy contributions made on Designing and Development of Cyclone Separators for efficient coal washing.
magnetic separation of hematite and limonite fines as hydrophobic flocs from iron ores - sciencedirect
Magnetic separation of weakly magnetic iron mineral fines in the form of flocs, which is termed Floc Magnetic Separation (FMS) process, has been studied in the present work, in order to find a substitution for high-intensity or high-gradient magnetic separators to treat the ores with weakly magnetic iron minerals in the fine size range. This study was performed on a hematite ore and a limonite ore that were finely ground to be micron particles, through the hydrophobic flocculation induced by sodium oleate and kerosene to make flocs. The experimental results have shown that the FMS process is effective to recover hematite and limonite fines at a middle magnetic field intensity, greatly increased the separation efficiency, compared with the conventional magnetic separation at the same conditions. By applying the process to the fine hematite ore containing 30.5% Fe, a concentrate assaying 64% Fe with 82% recovery has been produced. It has been found that the separation efficiency of the FMS process closely correlates with the main parameters of hydrophobic flocculation such as sodium oleate addition, conditioning time and kerosene addition. This finding suggests that the high efficiency achieved by the FMS process might be attributed to the considerable increase of the magnetic force on the iron mineral fines in the form of hydrophobic flocs in a magnetic field, thus the fines can be held by the separation plates in a magnetic separator and then be collected as magnetic concentrates.