The Experts below are selected from a list of 327 Experts worldwide ranked by ideXlab platform
R.q. Honaker - One of the best experts on this subject based on the ideXlab platform.
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application of hydrophobic and magnetic plastic particles for enhanced Flotation recovery
Minerals Engineering, 2016Co-Authors: R.q. Honaker, Mehmet Saracoglu, Qingqing HuangAbstract:Abstract The effect of hydrophobic and magnetic plastic particles having a contact angle of around 83° on Flotation performance was evaluated using coal particles of varying degrees of floatability. The magnetic plastic material were recovered by a low intensity magnetic separator and recycled back to the Flotation Feed for re-use. Flotation rate tests conducted on coal using a conventional cell proved that combustible recovery and Flotation rate were significantly enhanced with the addition of the plastic particles, especially for difficult-to-float coals, which was corroborated by Flotation column tests. Carrying capacity and particle size-by-size Flotation tests further showed that the magnetic plastic particles preferentially increased the recovery of coarse particles by as much as 35 absolute percentage points due to froth stabilization which reduced the selective detachment of coarse and/or weakly hydrophobic particles. The enhanced Flotation recovery was attributed to the influence on liquid drainage rate in the froth zone, froth stability, bubble coalescence and Flotation rates.
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A comparison study of column Flotation technologies for cleaning Illinois coal. [Quarterly] technical report, December 1, 1993--February 28, 1994
1994Co-Authors: R.q. Honaker, B.c. PaulAbstract:The objectives of this research project are to optimize the performance of six commercially available column technologies for the treatment of Illinois Basin coal fines and to compare their performance on the basis of the recovery-grade curve and column throughput capacity. A statistically-designed, experimental program will be conducted to optimize the critical operating performance values of each Flotation column. During the previous reporting period, construction and installation of the six Flotation columns were completed. The Flotation Feed sample that will be used for the tests in this investigation was collected from a coal preparation plant treating the Illinois No. 5 seam coal. During this reporting period, the Flotation Feed sample was characterized on a size-by-size basis for its ash, total sulfur, and BTU content. A release analysis was also conducted to obtain the best possible recovery versus product grade curve that can be achieved by a froth Flotation process for the treatment of the Illinois No. 5 Flotation Feed sample. Experiments were initiated on the Jameson Cell. The preliminary results indicate that the Jameson Cell achieves a separation performance that is close to the release data. The experimental program on the Jameson Cell and the other Flotation technologies will bemore » performed during the next reporting period.« less
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Production of Illinois base compliance coal using enhanced gravity separation. [Quarterly] technical report, December 1, 1993--February 28, 1994
1994Co-Authors: B.c. Paul, R.q. HonakerAbstract:Illinois Basin coal often contains a significant portion of finely dispersed pyrite. Most of the free pyrite particles exist in the fine size fractions, which are generally treated using froth Flotation. An inherent problem of their froth Flotation process is the inefficient treatment of middling particles containing a small amount of coal on their surface. On the other hand, gravity-based processes can effectively remove middling particles containing only a small amount of coal. Falcon Concentrators Inc. and Knelson Gold Concentrators Inc. have developed full-scale, enhanced gravity separators for the treatment of heavy minerals. This project will evaluate the potential of using these concentrators to de-ash and de-sulfurize Illinois coal fines. During this reporting period, sample characterization was completed and initial tests were conducted using the Falcon Concentrator. A 28 mesh {times} 0 Flotation Feed sample was collected from a local coal preparation plant treating the Illinois No. 6 seam coal. This sample was characterized on a size-by-size basis for sulfur, ash, and BTU content. A release analysis was conducted to determine the separation performance that can be achieved by froth Flotation. The initial Falcon Concentrator tests were conducted using both water and the Flotation Feed to provide a preliminary knowledgemore » base for its operational characteristics.« less
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A comparison study of column Flotation technologies for cleaning Illinois coal. Technical report, September 1--November 30, 1993
1993Co-Authors: R.q. Honaker, B.c. PaulAbstract:The objectives of this research project are to optimize the performance of six commercially available column technologies for the treatment of Illinois Basin coal fines and to compare their performance on the basis of the recovery-grade curve and column throughput capacity. A statistically-designed experimental program will be conducted to optimize the critical operating performance values of each Flotation column. The operating values suggested by the vendor will be used as the center point of the design. The ultimate recovery-grade curve and-the maximum throughput capacity for each column will be determined by conducting further tests using the optimum operating parameter values. During this reporting period, the Flotation columns that were not already present were purchased and received. Installation of all the Flotation columns was completed with the exception of the Packed-Column which is presently being mounted. A total of 25 fifty-five gallon drums of Illinois No. 5 Flotation Feed coal ({minus}100 mesh) was collected at a local preparation plant to be used as the Feed for the comparison tests. A complete characterization of this coal sample will be conducted during the next reporting period.
B.c. Paul - One of the best experts on this subject based on the ideXlab platform.
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A comparison study of column Flotation technologies for cleaning Illinois coal. [Quarterly] technical report, December 1, 1993--February 28, 1994
1994Co-Authors: R.q. Honaker, B.c. PaulAbstract:The objectives of this research project are to optimize the performance of six commercially available column technologies for the treatment of Illinois Basin coal fines and to compare their performance on the basis of the recovery-grade curve and column throughput capacity. A statistically-designed, experimental program will be conducted to optimize the critical operating performance values of each Flotation column. During the previous reporting period, construction and installation of the six Flotation columns were completed. The Flotation Feed sample that will be used for the tests in this investigation was collected from a coal preparation plant treating the Illinois No. 5 seam coal. During this reporting period, the Flotation Feed sample was characterized on a size-by-size basis for its ash, total sulfur, and BTU content. A release analysis was also conducted to obtain the best possible recovery versus product grade curve that can be achieved by a froth Flotation process for the treatment of the Illinois No. 5 Flotation Feed sample. Experiments were initiated on the Jameson Cell. The preliminary results indicate that the Jameson Cell achieves a separation performance that is close to the release data. The experimental program on the Jameson Cell and the other Flotation technologies will bemore » performed during the next reporting period.« less
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Production of Illinois base compliance coal using enhanced gravity separation. [Quarterly] technical report, December 1, 1993--February 28, 1994
1994Co-Authors: B.c. Paul, R.q. HonakerAbstract:Illinois Basin coal often contains a significant portion of finely dispersed pyrite. Most of the free pyrite particles exist in the fine size fractions, which are generally treated using froth Flotation. An inherent problem of their froth Flotation process is the inefficient treatment of middling particles containing a small amount of coal on their surface. On the other hand, gravity-based processes can effectively remove middling particles containing only a small amount of coal. Falcon Concentrators Inc. and Knelson Gold Concentrators Inc. have developed full-scale, enhanced gravity separators for the treatment of heavy minerals. This project will evaluate the potential of using these concentrators to de-ash and de-sulfurize Illinois coal fines. During this reporting period, sample characterization was completed and initial tests were conducted using the Falcon Concentrator. A 28 mesh {times} 0 Flotation Feed sample was collected from a local coal preparation plant treating the Illinois No. 6 seam coal. This sample was characterized on a size-by-size basis for sulfur, ash, and BTU content. A release analysis was conducted to determine the separation performance that can be achieved by froth Flotation. The initial Falcon Concentrator tests were conducted using both water and the Flotation Feed to provide a preliminary knowledgemore » base for its operational characteristics.« less
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A comparison study of column Flotation technologies for cleaning Illinois coal. Technical report, September 1--November 30, 1993
1993Co-Authors: R.q. Honaker, B.c. PaulAbstract:The objectives of this research project are to optimize the performance of six commercially available column technologies for the treatment of Illinois Basin coal fines and to compare their performance on the basis of the recovery-grade curve and column throughput capacity. A statistically-designed experimental program will be conducted to optimize the critical operating performance values of each Flotation column. The operating values suggested by the vendor will be used as the center point of the design. The ultimate recovery-grade curve and-the maximum throughput capacity for each column will be determined by conducting further tests using the optimum operating parameter values. During this reporting period, the Flotation columns that were not already present were purchased and received. Installation of all the Flotation columns was completed with the exception of the Packed-Column which is presently being mounted. A total of 25 fifty-five gallon drums of Illinois No. 5 Flotation Feed coal ({minus}100 mesh) was collected at a local preparation plant to be used as the Feed for the comparison tests. A complete characterization of this coal sample will be conducted during the next reporting period.
Mohammad Hasanzadeh - One of the best experts on this subject based on the ideXlab platform.
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Effect of pyrite content of Feed and configuration of locked particles on rougher Flotation of copper in low and high pyritic ore types
International Journal of Mining Science and Technology, 2018Co-Authors: Sahar Agheli, Ahmad Hassanzadeh, Behzad Vaziri Hassas, Mohammad HasanzadehAbstract:Abstract Misreported pyrite into copper concentrates dramatically declines copper grade and recovery. Copper Flotation can be also more complicated if Flotation Feed comes from an elevated-pyritic copper ore. In this investigation, the effect of two different ore types (high pyritic and low pyritic Feeds) was studied on rougher stage of industrial copper Flotation circuit. Samples were taken from different streams and the structure of chalcopyrite within the pyrite and non-sulfide gangue minerals was examined in various size fractions for mentioned ore types. Results indicated that 72% and 56% of the total floated pyrite was transferred to concentrate in first four cells in the low and high pyritic Feeds, respectively. Whereas, this proportion for floated SiO 2 in last ten cells was detected as 72% and 71%, respectively. A detailed interpretation of the effect of locked particles in different size fractions on rougher Flotation cells is studied from industrial point of view.
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Effect of pyrite content of Feed and configuration of locked particles on rougher Flotation of copper in low and high pyritic ore types
Elsevier, 2018Co-Authors: Sahar Agheli, Ahmad Hassanzadeh, Behzad Vaziri Hassas, Mohammad HasanzadehAbstract:Misreported pyrite into copper concentrates dramatically declines copper grade and recovery. Copper Flotation can be also more complicated if Flotation Feed comes from an elevated-pyritic copper ore. In this investigation, the effect of two different ore types (high pyritic and low pyritic Feeds) was studied on rougher stage of industrial copper Flotation circuit. Samples were taken from different streams and the structure of chalcopyrite within the pyrite and non-sulfide gangue minerals was examined in various size fractions for mentioned ore types. Results indicated that 72% and 56% of the total floated pyrite was transferred to concentrate in first four cells in the low and high pyritic Feeds, respectively. Whereas, this proportion for floated SiO2 in last ten cells was detected as 72% and 71%, respectively. A detailed interpretation of the effect of locked particles in different size fractions on rougher Flotation cells is studied from industrial point of view. Keywords: Liberation degree, High pyritic Feed, Pyrite, Froth Flotation, Chalcopyrit
Stephen Grano - One of the best experts on this subject based on the ideXlab platform.
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Improving the recovery of low grade coarse composite particles in porphyry copper ores
Advanced Powder Technology, 2011Co-Authors: Saeed Farrokhpay, Igor Ametov, Stephen GranoAbstract:Abstract The Flotation behaviour of low grade, coarse composite particles for two porphyry copper ores was studied. Different grinding times were employed to obtain size distributions for the Flotation Feed ( d 80 ) ranging from 150 to 320 μm. Copper containing particles in the fine to intermediate size ranges were recovered in the rougher Flotation stage. The rougher tailing was then screened through a 75 μm laboratory sieve. The +75 μm fraction was conditioned with a longer chain collector and floated in either normal viscosity (water) or high viscosity (glycerol–water mixture) medium. The recovery of copper was analysed on an un-sized and size-by-size basis. The recovery of coarse composite copper bearing particles was found to increase in high viscosity medium, even when the liberation of copper bearing minerals was only as low as 10%. The ability to recover these types of particles may result in a reduction in energy consumption in grinding due to the ability to achieve higher overall recovery of valuable mineral at coarse particle size distribution.
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Flotation Behaviour of Coarse Composite Copper Bearing Particles in High Viscosity Medium
2010Co-Authors: Saeed Farrokhpay, Igor Ametov, Stephen GranoAbstract:The Flotation behaviour of low grade, coarse composite particles from the rougher tailings of copper Flotation for two porphyry ores was studied. Different grinding times were used to obtain size distributions for the Flotation Feed (d80) ranging from 150 to 250 μm. Copper containing particles in the fine to intermediate size ranges were recovered in the rougher Flotation stage. The rougher tailing was then screened through a 75 μm laboratory sieve. The +75 μm fraction was conditioned with a longer chain collector and floated in either normal viscosity (water) or high viscosity (glycerol-water mixture) medium. The recovery of coarse composite copper bearing particles was found to increase in high viscosity medium. The ability to recover these types of particles may result in a reduction in energy consumption in grinding due to the ability to achieve higher overall recovery of valuable mineral.
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Effects of high Mg2+ concentration on KCl Flotation: Part I -Laboratory research
Minerals Engineering, 2007Co-Authors: David Weedon, Stephen Grano, Timothy Akroyd, Keila Goncalves, Rogerio MouraAbstract:Abstract A series of Flotation tests on coarse KCl particles in brine solution prepared from potash ore from the Taquari Vassouras mine (Companhia Vale do Rio Doce; CVRD), Aracaju, Brazil was carried out to determine the recovery of sylvite in the presence of high concentrations of Mg 2+ . The introduction of Mg 2+ caused the precipitation of fine salt crystals that consist mostly of NaCl (90%+) but also some KCl. However, the introduction of Mg 2+ also caused the nucleation of fine crystals of NaCl and KCl on the surface of the coarse KCl in the Flotation Feed. The nucleation of these fine surface crystals on the coarse KCl may have added to a (net) improvement in the recovery of the coarse KCl. However, a precipitate of fine NaCl with some KCl crystals, competed for collector and caused depression of the coarse KCl. When these precipitates were removed before collector addition, the collector subsequently adsorbed on the coarse KCl and the recovery of coarse KCl improved significantly.
S. Al-thyabat - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of Mechanical Flotation of Non-slimed Jordanian Siliceous Phosphate
Arabian Journal for Science and Engineering, 2012Co-Authors: S. Al-thyabatAbstract:In phosphate Flotation, it is a common practice to deslime Flotation Feed (i.e. remove fine particles) to reduce the negative impact of fines on Flotation performance. This causes a significant loss of valuables which affects the economic of phosphate beneficiation process. In this work, three-level fractional factorial experimental design was used to evaluate the effectiveness of collector, frother and depressant dosage on non-slimed Flotation Feed. The results showed that froth dosage and collector–depressant interaction were the most significant Flotation parameters. On the other hand, depressant dosage and depressant–collector interaction were the least significant parameters. A concentrate grade assaying 26.46 % P_2O_5 at 75.07 % recovery was obtained with 800 g/t collector and 50 ppm frother, without using any sodium silicate. Based on the assumption that 20 % of valuable phosphate may be lost by desliming, these results are roughly equivalent to 94 % recovery of the total phosphate in (−1 mm) Feed. This suggests the use of Flotation of non-slimed Feed (−1 mm) with low-collector dosage and frother, but without any sodium silicate as a pre-rougher phosphate Flotation step.
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Statistical evaluation of the effect of conditioning time and slurry concentration on the Flotation performance of siliceous phosphate
Mining Metallurgy & Exploration, 2008Co-Authors: S. Al-thyabatAbstract:Conditioning of Flotation Feed is an important prerequisite for efficient Flotation. This process depends on parameters such as conditioning time, slurry concentration and slurry pH. The objective of this paper is to optimize the conditioning process for the Flotation Feed. This was achieved by first conducting preliminary experiments at constant slurry pH to determine the significant ranges of slurry concentration and conditioning time. Then, factorial experimental design (3^2 experiments) was used to investigate the significance of the above parameters and their interactions on Flotation recovery and grade. Statistical analyses using ANOVA approach showed that Flotation recovery (R) and concentrate grade (g) were affected by Feed conditioning. It was found that concentrate grade was linearly proportional to the slurry concentration and conditioning time, while Flotation recovery was exponentially proportional to the conditioning parameters. A contour plot of the Flotation response (recovery and grade) against conditioning parameters showed that the optimum operating parameters for Flotation Feed conditioning was a conditioning time of 1.5 to 2 minutes and a slurry conentration of 55% to 60%.