The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform
B K Mishra - One of the best experts on this subject based on the ideXlab platform.
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tribo electrostatic separation of high ash Coking Coal washery rejects effect of moisture on separation efficiency
Powder Technology, 2016Co-Authors: S K Mohanta, P. S. R. Reddy, B Rout, R K Dwari, B K MishraAbstract:Abstract The present study illustrates the influence of relative humidity (RH) and applied voltage on the tribo-electrostatic separation of ash from Indian Coking Coal washery rejects. A prototype system was designed, fabricated, and installed to carry out the separation studies. The rejects on an average contained 51% ash; 33% fixed carbon and 16% volatile matter. The contact electrification of carbon and ash forming minerals was carried out using a rotary drum tribo-charger. The results indicate that the absolute charge magnitude of these particles is different and dependent on the operating variables. The charge magnitude of the particles decreases with an increase in humidity and a higher differential charge between carbon and mineral matter can be struck at lower RH. The results also show that the charge magnitude increases with an increase in the tribo-charging time. The influence of environmental moisture on the tribo-electrostatic separation of Coking Coal was analysed. The results show that the yield and quality of the clean Coal decreases with an increase in humidity but increases with an increase in applied voltage. The optimum separation efficiency is achieved at 10% RH, and 15 kV applied DC voltage. The overall results reflect that it is possible to produce clean Coal with 35% ash at 35% yield from the feed sample (rejects) with 53% ash.
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studies on the effect of electrode plate position and feed temperature on the tribo electrostatic separation of high ash indian Coking Coal
Advanced Powder Technology, 2015Co-Authors: R K Dwari, P. S. R. Reddy, S K Mohanta, B Rout, Rahul K Soni, B K MishraAbstract:Abstract Investigations were carried out to understand the design aspects of tribo-electrostatic separator to separate ash from high ash Indian Coking Coal. Initial studies were aimed to evaluate the different physical, chemical and electrical properties of quartz, kaolinite, and carbon particles. The significant design variables such as plate angle and plate gap were evaluated to effect the optimum separation. The absolute charge acquired by quartz, kaolinite, and carbon were observed to be different. The results indicate that the magnitude of charge increases with the increase in the time of tribo-charging using copper tribo-charging medium. A mathematical model was formulated based on design and operating parameters of the experimental set up to simulate the particle trajectories. The particle trajectories were simulated using measured physical and electrical properties of mineral and carbon particles at experimental design and operating conditions. The simulated trajectories were validated with experimental data. The results of plate position and feed particle temperature indicated that there were optimum conditions to achieve the desired performance. The simulation and experimental results were in good agreement. The optimum separation was achieved at plate inclination of 5°. It was possible to reduce ash content by 10% at 61% yield. Better quality clean Coal at 33% ash was achieved from 53% ash feed Coal with lower yield.
P. S. R. Reddy - One of the best experts on this subject based on the ideXlab platform.
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tribo electrostatic separation of high ash Coking Coal washery rejects effect of moisture on separation efficiency
Powder Technology, 2016Co-Authors: S K Mohanta, P. S. R. Reddy, B Rout, R K Dwari, B K MishraAbstract:Abstract The present study illustrates the influence of relative humidity (RH) and applied voltage on the tribo-electrostatic separation of ash from Indian Coking Coal washery rejects. A prototype system was designed, fabricated, and installed to carry out the separation studies. The rejects on an average contained 51% ash; 33% fixed carbon and 16% volatile matter. The contact electrification of carbon and ash forming minerals was carried out using a rotary drum tribo-charger. The results indicate that the absolute charge magnitude of these particles is different and dependent on the operating variables. The charge magnitude of the particles decreases with an increase in humidity and a higher differential charge between carbon and mineral matter can be struck at lower RH. The results also show that the charge magnitude increases with an increase in the tribo-charging time. The influence of environmental moisture on the tribo-electrostatic separation of Coking Coal was analysed. The results show that the yield and quality of the clean Coal decreases with an increase in humidity but increases with an increase in applied voltage. The optimum separation efficiency is achieved at 10% RH, and 15 kV applied DC voltage. The overall results reflect that it is possible to produce clean Coal with 35% ash at 35% yield from the feed sample (rejects) with 53% ash.
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studies on the effect of electrode plate position and feed temperature on the tribo electrostatic separation of high ash indian Coking Coal
Advanced Powder Technology, 2015Co-Authors: R K Dwari, P. S. R. Reddy, S K Mohanta, B Rout, Rahul K Soni, B K MishraAbstract:Abstract Investigations were carried out to understand the design aspects of tribo-electrostatic separator to separate ash from high ash Indian Coking Coal. Initial studies were aimed to evaluate the different physical, chemical and electrical properties of quartz, kaolinite, and carbon particles. The significant design variables such as plate angle and plate gap were evaluated to effect the optimum separation. The absolute charge acquired by quartz, kaolinite, and carbon were observed to be different. The results indicate that the magnitude of charge increases with the increase in the time of tribo-charging using copper tribo-charging medium. A mathematical model was formulated based on design and operating parameters of the experimental set up to simulate the particle trajectories. The particle trajectories were simulated using measured physical and electrical properties of mineral and carbon particles at experimental design and operating conditions. The simulated trajectories were validated with experimental data. The results of plate position and feed particle temperature indicated that there were optimum conditions to achieve the desired performance. The simulation and experimental results were in good agreement. The optimum separation was achieved at plate inclination of 5°. It was possible to reduce ash content by 10% at 61% yield. Better quality clean Coal at 33% ash was achieved from 53% ash feed Coal with lower yield.
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The Utilization of Non-Coking Coal by Flotation Using Non-conventional Reagents
Energy Sources Part A-recovery Utilization and Environmental Effects, 2010Co-Authors: P. S. R. ReddyAbstract:Abstract Flotation studies of non-Coking Coal using two non-conventional collectors, namely Polanga and Mahua oil, containing both saturated and unsaturated fatty acids are investigated. The effect of oil concentration, surface modifier, and dispersant are studied. The results of the studies have shown that despite their higher consumption, both of the oils can be used as the flotation collector. The ash level could be reduced to 22% with 60% yield from a non-Coking Coal containing 40.2% ash. The results of the studies are comparable with the flotation studies of conventional reagents, such as diesel oil and methyl iso-butyl carbinol. Electro-kinetic measurements and x-ray diffraction studies are carried out to understand the surface properties and minerals present in non-Coking Coal.
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comparative study of the performance of conventional and column flotation when treating Coking Coal fines
Fuel Processing Technology, 2008Co-Authors: M. S. Jena, S. K. Biswal, P. S. R. ReddyAbstract:Investigations were carried out on Coking Coal fines by conventional cell and column flotation techniques. The effects of different operating parameters were evaluated for both conventional and column flotation. The Coal fines were collected from Bhojudih washery, India. These Coal fines averaged 24.4% ash, 19.8% volatile matter and 53.8% fixed carbon on a dry basis. A commercial grade sodium silicate, light diesel oil and pine oil were used as depressant, collector and frother respectively. The flotation performance was compared with release analysis. The conventional flotation results indicated that a clean Coal with 14.4% ash could be obtained at 78.0% yield with 88.4% combustible recovery. The ash of the clean Coal could be further reduced to 10.1% at 72.0% yield with 85.6% combustible recovery by using column flotation. The column flotation results were close to those obtained by release analysis.
S K Mohanta - One of the best experts on this subject based on the ideXlab platform.
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tribo electrostatic separation of high ash Coking Coal washery rejects effect of moisture on separation efficiency
Powder Technology, 2016Co-Authors: S K Mohanta, P. S. R. Reddy, B Rout, R K Dwari, B K MishraAbstract:Abstract The present study illustrates the influence of relative humidity (RH) and applied voltage on the tribo-electrostatic separation of ash from Indian Coking Coal washery rejects. A prototype system was designed, fabricated, and installed to carry out the separation studies. The rejects on an average contained 51% ash; 33% fixed carbon and 16% volatile matter. The contact electrification of carbon and ash forming minerals was carried out using a rotary drum tribo-charger. The results indicate that the absolute charge magnitude of these particles is different and dependent on the operating variables. The charge magnitude of the particles decreases with an increase in humidity and a higher differential charge between carbon and mineral matter can be struck at lower RH. The results also show that the charge magnitude increases with an increase in the tribo-charging time. The influence of environmental moisture on the tribo-electrostatic separation of Coking Coal was analysed. The results show that the yield and quality of the clean Coal decreases with an increase in humidity but increases with an increase in applied voltage. The optimum separation efficiency is achieved at 10% RH, and 15 kV applied DC voltage. The overall results reflect that it is possible to produce clean Coal with 35% ash at 35% yield from the feed sample (rejects) with 53% ash.
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studies on the effect of electrode plate position and feed temperature on the tribo electrostatic separation of high ash indian Coking Coal
Advanced Powder Technology, 2015Co-Authors: R K Dwari, P. S. R. Reddy, S K Mohanta, B Rout, Rahul K Soni, B K MishraAbstract:Abstract Investigations were carried out to understand the design aspects of tribo-electrostatic separator to separate ash from high ash Indian Coking Coal. Initial studies were aimed to evaluate the different physical, chemical and electrical properties of quartz, kaolinite, and carbon particles. The significant design variables such as plate angle and plate gap were evaluated to effect the optimum separation. The absolute charge acquired by quartz, kaolinite, and carbon were observed to be different. The results indicate that the magnitude of charge increases with the increase in the time of tribo-charging using copper tribo-charging medium. A mathematical model was formulated based on design and operating parameters of the experimental set up to simulate the particle trajectories. The particle trajectories were simulated using measured physical and electrical properties of mineral and carbon particles at experimental design and operating conditions. The simulated trajectories were validated with experimental data. The results of plate position and feed particle temperature indicated that there were optimum conditions to achieve the desired performance. The simulation and experimental results were in good agreement. The optimum separation was achieved at plate inclination of 5°. It was possible to reduce ash content by 10% at 61% yield. Better quality clean Coal at 33% ash was achieved from 53% ash feed Coal with lower yield.
R K Dwari - One of the best experts on this subject based on the ideXlab platform.
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tribo electrostatic separation of high ash Coking Coal washery rejects effect of moisture on separation efficiency
Powder Technology, 2016Co-Authors: S K Mohanta, P. S. R. Reddy, B Rout, R K Dwari, B K MishraAbstract:Abstract The present study illustrates the influence of relative humidity (RH) and applied voltage on the tribo-electrostatic separation of ash from Indian Coking Coal washery rejects. A prototype system was designed, fabricated, and installed to carry out the separation studies. The rejects on an average contained 51% ash; 33% fixed carbon and 16% volatile matter. The contact electrification of carbon and ash forming minerals was carried out using a rotary drum tribo-charger. The results indicate that the absolute charge magnitude of these particles is different and dependent on the operating variables. The charge magnitude of the particles decreases with an increase in humidity and a higher differential charge between carbon and mineral matter can be struck at lower RH. The results also show that the charge magnitude increases with an increase in the tribo-charging time. The influence of environmental moisture on the tribo-electrostatic separation of Coking Coal was analysed. The results show that the yield and quality of the clean Coal decreases with an increase in humidity but increases with an increase in applied voltage. The optimum separation efficiency is achieved at 10% RH, and 15 kV applied DC voltage. The overall results reflect that it is possible to produce clean Coal with 35% ash at 35% yield from the feed sample (rejects) with 53% ash.
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studies on the effect of electrode plate position and feed temperature on the tribo electrostatic separation of high ash indian Coking Coal
Advanced Powder Technology, 2015Co-Authors: R K Dwari, P. S. R. Reddy, S K Mohanta, B Rout, Rahul K Soni, B K MishraAbstract:Abstract Investigations were carried out to understand the design aspects of tribo-electrostatic separator to separate ash from high ash Indian Coking Coal. Initial studies were aimed to evaluate the different physical, chemical and electrical properties of quartz, kaolinite, and carbon particles. The significant design variables such as plate angle and plate gap were evaluated to effect the optimum separation. The absolute charge acquired by quartz, kaolinite, and carbon were observed to be different. The results indicate that the magnitude of charge increases with the increase in the time of tribo-charging using copper tribo-charging medium. A mathematical model was formulated based on design and operating parameters of the experimental set up to simulate the particle trajectories. The particle trajectories were simulated using measured physical and electrical properties of mineral and carbon particles at experimental design and operating conditions. The simulated trajectories were validated with experimental data. The results of plate position and feed particle temperature indicated that there were optimum conditions to achieve the desired performance. The simulation and experimental results were in good agreement. The optimum separation was achieved at plate inclination of 5°. It was possible to reduce ash content by 10% at 61% yield. Better quality clean Coal at 33% ash was achieved from 53% ash feed Coal with lower yield.
B Rout - One of the best experts on this subject based on the ideXlab platform.
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tribo electrostatic separation of high ash Coking Coal washery rejects effect of moisture on separation efficiency
Powder Technology, 2016Co-Authors: S K Mohanta, P. S. R. Reddy, B Rout, R K Dwari, B K MishraAbstract:Abstract The present study illustrates the influence of relative humidity (RH) and applied voltage on the tribo-electrostatic separation of ash from Indian Coking Coal washery rejects. A prototype system was designed, fabricated, and installed to carry out the separation studies. The rejects on an average contained 51% ash; 33% fixed carbon and 16% volatile matter. The contact electrification of carbon and ash forming minerals was carried out using a rotary drum tribo-charger. The results indicate that the absolute charge magnitude of these particles is different and dependent on the operating variables. The charge magnitude of the particles decreases with an increase in humidity and a higher differential charge between carbon and mineral matter can be struck at lower RH. The results also show that the charge magnitude increases with an increase in the tribo-charging time. The influence of environmental moisture on the tribo-electrostatic separation of Coking Coal was analysed. The results show that the yield and quality of the clean Coal decreases with an increase in humidity but increases with an increase in applied voltage. The optimum separation efficiency is achieved at 10% RH, and 15 kV applied DC voltage. The overall results reflect that it is possible to produce clean Coal with 35% ash at 35% yield from the feed sample (rejects) with 53% ash.
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studies on the effect of electrode plate position and feed temperature on the tribo electrostatic separation of high ash indian Coking Coal
Advanced Powder Technology, 2015Co-Authors: R K Dwari, P. S. R. Reddy, S K Mohanta, B Rout, Rahul K Soni, B K MishraAbstract:Abstract Investigations were carried out to understand the design aspects of tribo-electrostatic separator to separate ash from high ash Indian Coking Coal. Initial studies were aimed to evaluate the different physical, chemical and electrical properties of quartz, kaolinite, and carbon particles. The significant design variables such as plate angle and plate gap were evaluated to effect the optimum separation. The absolute charge acquired by quartz, kaolinite, and carbon were observed to be different. The results indicate that the magnitude of charge increases with the increase in the time of tribo-charging using copper tribo-charging medium. A mathematical model was formulated based on design and operating parameters of the experimental set up to simulate the particle trajectories. The particle trajectories were simulated using measured physical and electrical properties of mineral and carbon particles at experimental design and operating conditions. The simulated trajectories were validated with experimental data. The results of plate position and feed particle temperature indicated that there were optimum conditions to achieve the desired performance. The simulation and experimental results were in good agreement. The optimum separation was achieved at plate inclination of 5°. It was possible to reduce ash content by 10% at 61% yield. Better quality clean Coal at 33% ash was achieved from 53% ash feed Coal with lower yield.