The Experts below are selected from a list of 276 Experts worldwide ranked by ideXlab platform
Sunil Kumar Tripathy - One of the best experts on this subject based on the ideXlab platform.
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Prediction of Separation Performance of Dry High Intensity Magnetic Separator for Processing of Para-Magnetic Minerals
Journal of The Institution of Engineers (India): Series D, 2015Co-Authors: Sunil Kumar Tripathy, V. Singh, Nikkam SureshAbstract:High intensity dry Magnetic Separators are gaining popularity for the separation of para-Magnetic minerals due to the cost economic factor. Induced roll Magnetic Separator is found to be an effective dry Separator for the separation of fine particles. Separation efficiency of this Separator depends on mineral characteristics and the design features of equipment along with the optimization of process variables. Present investigation focuses on the prediction and validation of separation performance of minerals while treating in induced roll Magnetic Separator. Prediction of the separation is expressed in terms of separation angle at which a particle leaves the rotor surface by using a modified particle flow model derived by Cakir. The validation of the model is carried by capturing the particle trajectory using an image analyzer. It is found that Cakir’s mathematical model produces reliable results and a new model is proposed to increase the reliability of separation angle prediction by including the particle shape factor.
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separation analysis of dry high intensity induced roll Magnetic Separator for concentration of hematite fines
Powder Technology, 2014Co-Authors: Sunil Kumar Tripathy, P K Banerjee, Nikkam SureshAbstract:Abstract In this study, a three level Box–Behnken 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% SiO 2 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.
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particle flow modeling of dry induced roll Magnetic Separator
Powder Technology, 2013Co-Authors: V. Singh, Sunil Kumar TripathyAbstract:Abstract Magnetic Separators have unrestricted industrial application and are widely used in mineral beneficiation, food, textiles, plastic and ceramic processing industry. Separation efficiency of Magnetic Separator depends on material characteristics and the design features of equipment along with the optimization of process variables. This study is based on a novel application of image processing technique to capture the particle trajectory on induced roll in an electroMagnetic Separator while treating Magnetic particles. Three different minerals of different Magnetic susceptibility were selected to investigate this approach. Trajectories of 3 mm diameter balls of mineral fines were captured using an image analyzer at different operating conditions. The particle trajectory captured was compared with the trajectory predicted by Cakir mathematical model. The separation angle between roll and particles was considered as a separation performance measure. It was found that Cakir mathematical model produce reliable result and a new model was proposed to increase the reliability of separation angle prediction by including the particle shape factor. The proposed model can be utilized to optimize the Magnetic separation process while treating paraMagnetic minerals.
M. Franzreb - One of the best experts on this subject based on the ideXlab platform.
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A novel repulsive-mode high-gradient Magnetic Separator. Part II. Separation model
IEEE Transactions on Magnetics, 2004Co-Authors: C. Hoffmann, M. FranzrebAbstract:We present a model that allows the theoretical description of three-dimensional particle movement of Magnetically susceptible particles in a continuously operating two-wire high-gradient repulsive-mode Magnetic Separator (RMMS) under laminar flow conditions. From the calculated trajectories, separation efficiencies can be determined by a statistical approach. We compare the model to experiments on a lab-type RMMS and synthetic magnetite in water.
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A novel repulsive-mode high gradient Magnetic Separator. Part I. Design and experimental results
IEEE Transactions on Magnetics, 2004Co-Authors: C. Hoffmann, M. FranzrebAbstract:We present a novel design for a continuously operating wet high-gradient repulsive mode Magnetic Separator (RMMS). The Separator utilizes strong repulsive Magnetic forces generated by a two-wire system placed into a permanent magnet's background Magnetic field and a separation channel with one inlet and three outlet streams. In contrast to earlier RMMS designs, our Separator takes into consideration the repulsive and attractive forces on the particles, which have a major effect in the beginning and the end of the particles' trajectories, respectively. Moreover, the design presented here permits an easy way to scale up the Separator by a matrix arrangement of both wires and separation channels. We examine the influence of system parameters on the separation efficiency experimentally, using synthetic magnetite microparticles in water as a model system.
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A novel high-gradient Magnetic Separator (HGMS) design for biotech applications
IEEE Transactions on Applied Superconductivity, 2002Co-Authors: C. Hoffmann, M. Franzreb, W.h. HollAbstract:A novel high-gradient Magnetic Separator (HGMS) has been designed to meet the strong requirements of biotech processes to grant high product yield, efficient cleanability and low operating costs. The novel design using a rotary permanent magnet leads to an "on-off" characteristic of the field in the separation zone. This combines the permanent magnet's advantage of low running costs with the solenoid's advantage to flush the filter in place. The utilization of NdFeB magnets into the yoke allows high Magnetic inductions leading to efficient and fast separation of Magnetic supports used in biotech processes. The bioprocess requirement of complete particle recovery and efficient matrix cleaning after separation was achieved by the integration of an ultrasonication device.
C. Hoffmann - One of the best experts on this subject based on the ideXlab platform.
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A novel repulsive-mode high-gradient Magnetic Separator. Part II. Separation model
IEEE Transactions on Magnetics, 2004Co-Authors: C. Hoffmann, M. FranzrebAbstract:We present a model that allows the theoretical description of three-dimensional particle movement of Magnetically susceptible particles in a continuously operating two-wire high-gradient repulsive-mode Magnetic Separator (RMMS) under laminar flow conditions. From the calculated trajectories, separation efficiencies can be determined by a statistical approach. We compare the model to experiments on a lab-type RMMS and synthetic magnetite in water.
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A novel repulsive-mode high gradient Magnetic Separator. Part I. Design and experimental results
IEEE Transactions on Magnetics, 2004Co-Authors: C. Hoffmann, M. FranzrebAbstract:We present a novel design for a continuously operating wet high-gradient repulsive mode Magnetic Separator (RMMS). The Separator utilizes strong repulsive Magnetic forces generated by a two-wire system placed into a permanent magnet's background Magnetic field and a separation channel with one inlet and three outlet streams. In contrast to earlier RMMS designs, our Separator takes into consideration the repulsive and attractive forces on the particles, which have a major effect in the beginning and the end of the particles' trajectories, respectively. Moreover, the design presented here permits an easy way to scale up the Separator by a matrix arrangement of both wires and separation channels. We examine the influence of system parameters on the separation efficiency experimentally, using synthetic magnetite microparticles in water as a model system.
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A novel high-gradient Magnetic Separator (HGMS) design for biotech applications
IEEE Transactions on Applied Superconductivity, 2002Co-Authors: C. Hoffmann, M. Franzreb, W.h. HollAbstract:A novel high-gradient Magnetic Separator (HGMS) has been designed to meet the strong requirements of biotech processes to grant high product yield, efficient cleanability and low operating costs. The novel design using a rotary permanent magnet leads to an "on-off" characteristic of the field in the separation zone. This combines the permanent magnet's advantage of low running costs with the solenoid's advantage to flush the filter in place. The utilization of NdFeB magnets into the yoke allows high Magnetic inductions leading to efficient and fast separation of Magnetic supports used in biotech processes. The bioprocess requirement of complete particle recovery and efficient matrix cleaning after separation was achieved by the integration of an ultrasonication device.
V. Singh - One of the best experts on this subject based on the ideXlab platform.
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Prediction of Separation Performance of Dry High Intensity Magnetic Separator for Processing of Para-Magnetic Minerals
Journal of The Institution of Engineers (India): Series D, 2015Co-Authors: Sunil Kumar Tripathy, V. Singh, Nikkam SureshAbstract:High intensity dry Magnetic Separators are gaining popularity for the separation of para-Magnetic minerals due to the cost economic factor. Induced roll Magnetic Separator is found to be an effective dry Separator for the separation of fine particles. Separation efficiency of this Separator depends on mineral characteristics and the design features of equipment along with the optimization of process variables. Present investigation focuses on the prediction and validation of separation performance of minerals while treating in induced roll Magnetic Separator. Prediction of the separation is expressed in terms of separation angle at which a particle leaves the rotor surface by using a modified particle flow model derived by Cakir. The validation of the model is carried by capturing the particle trajectory using an image analyzer. It is found that Cakir’s mathematical model produces reliable results and a new model is proposed to increase the reliability of separation angle prediction by including the particle shape factor.
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particle flow modeling of dry induced roll Magnetic Separator
Powder Technology, 2013Co-Authors: V. Singh, Sunil Kumar TripathyAbstract:Abstract Magnetic Separators have unrestricted industrial application and are widely used in mineral beneficiation, food, textiles, plastic and ceramic processing industry. Separation efficiency of Magnetic Separator depends on material characteristics and the design features of equipment along with the optimization of process variables. This study is based on a novel application of image processing technique to capture the particle trajectory on induced roll in an electroMagnetic Separator while treating Magnetic particles. Three different minerals of different Magnetic susceptibility were selected to investigate this approach. Trajectories of 3 mm diameter balls of mineral fines were captured using an image analyzer at different operating conditions. The particle trajectory captured was compared with the trajectory predicted by Cakir mathematical model. The separation angle between roll and particles was considered as a separation performance measure. It was found that Cakir mathematical model produce reliable result and a new model was proposed to increase the reliability of separation angle prediction by including the particle shape factor. The proposed model can be utilized to optimize the Magnetic separation process while treating paraMagnetic minerals.
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Connectionist approach for modeling the dry roll Magnetic Separator
Mining Metallurgy & Exploration, 2009Co-Authors: V. SinghAbstract:Magnetic separation is an age-old technique for mineral beneficiation operations. The existing mathematical models for Magnetic Separators are quite complicated, and it is very difficult to measure the theoretical separation efficiency. The connectionist approach of modeling, to establish the relationships of the inputs and outputs, is preferred for this kind of problem. Experiments were carried out on a high-intensity roll Magnetic Separator to develop a database using four input variables (Magnetic flux intensity, particle size, splitter position and roll speed) and two output variables (weight recovery and Fe recovery). The artificial neural network (ANN) and statistical methods (MLRG) were used to model the Magnetic separation process. For the ANN, the regression coefficient (R^2) values between the predicted and measured results were 0.89 and 0.94 for Fe recovery and weight recovery, respectively. Compared to ANN, the multivariable linear regression analysis showed inferior performance in predicting the weight recovery and the Fe recovery. The ANN models for the roll Magnetic Separator can predict the separation efficiency up to an acceptable limit. These models can be used to modify the operational parameters at mineral beneficiation plants to minimize the effects of variations in the raw material characteristics.
Nikkam Suresh - One of the best experts on this subject based on the ideXlab platform.
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Prediction of Separation Performance of Dry High Intensity Magnetic Separator for Processing of Para-Magnetic Minerals
Journal of The Institution of Engineers (India): Series D, 2015Co-Authors: Sunil Kumar Tripathy, V. Singh, Nikkam SureshAbstract:High intensity dry Magnetic Separators are gaining popularity for the separation of para-Magnetic minerals due to the cost economic factor. Induced roll Magnetic Separator is found to be an effective dry Separator for the separation of fine particles. Separation efficiency of this Separator depends on mineral characteristics and the design features of equipment along with the optimization of process variables. Present investigation focuses on the prediction and validation of separation performance of minerals while treating in induced roll Magnetic Separator. Prediction of the separation is expressed in terms of separation angle at which a particle leaves the rotor surface by using a modified particle flow model derived by Cakir. The validation of the model is carried by capturing the particle trajectory using an image analyzer. It is found that Cakir’s mathematical model produces reliable results and a new model is proposed to increase the reliability of separation angle prediction by including the particle shape factor.
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separation analysis of dry high intensity induced roll Magnetic Separator for concentration of hematite fines
Powder Technology, 2014Co-Authors: Sunil Kumar Tripathy, P K Banerjee, Nikkam SureshAbstract:Abstract In this study, a three level Box–Behnken 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% SiO 2 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.