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Journal articles on the topic 'Floatability'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 February 2022

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1

Choi, Junhyun, Joobeom Seo, Sang Bae Kim, and Wantae Kim. "Flotation Behavior of Malachite Using Hydrophobic Talc Nanoparticles as Collectors." Minerals 10, no. 9 (August 27, 2020): 756. http://dx.doi.org/10.3390/min10090756.

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In this study, the flotation behavior of malachite was investigated using hydrophobic talc nanoparticles (TNs) as collectors. To improve the floatability of TN-deposited malachite, various experimental parameters were systematically investigated. We found that the floatability sharply increased as the size of the TNs decreased. The floatability of malachite was enhanced in the presence of smaller TNs, since higher amounts of smaller TNs were deposited on the surface of the malachite, thus rendering the surface more hydrophobic. Moreover, the floatability of the TN-deposited malachite increased as the pH decreased, likely due to the more favorable interaction between TNs and malachite by means of electrostatic attraction. Furthermore, the floatability became more enhanced as the TN concentration increased, likely associated with increases in the amount of TNs deposited on the surface of the malachite, thus enhancing the floatability by altering the hydrophobicity of the surface. Our findings suggest that the application of natural hydrophobic TNs as collectors in malachite flotation should be introduced as a new concept.

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2

Zhang, Yue Jun, Ming Tan, Tao Wu, and Tian Ran Feng. "Numerical Simulation of Flotation Circuit for Kakoxene Ore Processing." Applied Mechanics and Materials 331 (July 2013): 43–47. http://dx.doi.org/10.4028/www.scientific.net/amm.331.43.

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A group of data from a batch flotation tests were plug into a batch flotation model, and mineral floatability parameters (flotation rate constant, mass fraction of floatability component) were derived from model calculation. Then a flotation circuit of kakoxene ore was designed in JKSimFloat simulator, after inputting those floatability parameters to flotation circuit model, the ultimate grade and recovery of apatite was obtained by analog computation. Meanwhile, the same flotation circuit test was achieved in the laboratory. The apatite grade in concentrate is 66.61% at the recovery of 78.35% by simulation, while apatite grade in concentrate is 72.70% at the recovery of 88.14% in the laboratory tests. Compared with experiment data, the accuracy of simulation is acceptable.

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3

Khat'kova, A. N., L. G. Nikitina, and S. A. Pateyuk. "Floatability of borogypsum with perlastan." Mining Informational and analytical bulletin 11 (2019): 160–71. http://dx.doi.org/10.25018/0236-1493-2019-11-0-160-171.

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4

Hakim, Arif Rahman, Wahyu Tri Handoyo, Toni Dwi Novianto, and Andrianto Widi Prasetyo. "Effects of Twin-Screw Extruders Condition to Physical Properties of Floating Fish Feed." Jurnal Perikanan Universitas Gadjah Mada 21, no. 2 (December 30, 2019): 79. http://dx.doi.org/10.22146/jfs.44821.

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Process production of floating fish feed in a society constrained by processing technology. The objective of this study was to observe effect of condition process of twin screw extruders to the physical and chemical properties of produced of floating fish feed. Ingredients used involve fish meal, soybean meal, corn meal, and tapioca flour. The ingredients are mixed with 15, 20 and 25% water added to the total weight. Extrusion process condition conducted by several treatments i.e screw speed (540, 540, 600, 660 rpm) and barrel temperatures (80, 90, 100, 110, 120℃). In order to study, expansion ratio, unit density, floatability and hardness of feed were observed as physical parameters while chemical properties include moisture and protein content. Experimental result showed that addition 25 % water to the formula gives a good performance of expansion ratio, unit density and floatability than 15% and 20% moisture content. Higher of screw speed produces feed with higher ratio expansion, lower unit density, and higher floatability. The optimum of screw speed is 600 rpm. Meanwhile increasing of barrel temperature caused reduction of unit density, and escalation floatability of feed. Best barrel temperature to meet the physical properties is 120℃. The produced feed contain protein 32.38-41.95% and moisture content 4.37-5.70%.

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5

Suliswati, Lulu, Catur Sriherwanto, and Imam Suja'i. "DAMPAK TEKNIK PENGIRISAN DAN PENCETAKAN TERHADAP DAYA APUNG PAKAN IKAN YANG DIFERMENTASI MENGGUNAKAN Rhizopus sp." Jurnal Bioteknologi & Biosains Indonesia (JBBI) 5, no. 2 (December 26, 2018): 127. http://dx.doi.org/10.29122/jbbi.v5i2.3096.

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Impact of Slicing and Moulding Techniques on the Floatability of the Fish Feed Fermented by Rhizopus sp.ABSTRACTThe use of Rhizopus sp. mycelium as biocoating, biostabilizing, and biofloating agent in the production of floating fish feed through solid fermentation had already been studied as a much simpler alternative to mechanical extrusion. The fermented fish feed, however, had poor floatability in aerated water, probably due to structural damage during the size reduction process of the feed. Thus, this study used alternative size-reducing methods, namely slicing and moulding, to improve the floatability of the fermented feed. Other physical characteristics were also measured and compared to those of commercial sinking and floating fish feeds. Results showed that both the moulded and the sliced fermented-feeds had lower density as well as higher water stability, absorption capacity, floatability, and durability compared to those of the commercial sinking feed used as the fermentation substrate. The hydrophobicity of all the feeds tested were similar, however. The floatability of the fermented feeds obtained in this study was much higher than those of the previous studies. Keywords: floatability, floating feed, sinking feed, water absorption, water stabilityABSTRAKPenggunaan miselium Rhizopus sp. sebagai pelapis permukaan, penstabil, dan pengapung hayati dalam pembuatan pakan ikan apung melalui fermentasi padat telah diteliti sebagai alternatif yang jauh lebih sederhana dibandingkan dengan metode ekstrusi mesin. Namun, pakan ikan fermentasi ini memiliki daya apung yang buruk dalam air bergelembung udara, yang mungkin disebabkan kerusakan struktural selama proses pengecilan ukuran pakan. Karenanya, penelitian ini menggunakan metode lain untuk mengecilkan ukuran, yakni pencetakan dan pengirisan, dalam rangka meningkatkan daya apung pakan yang difermentasi. Karakteristik fisik lainnya juga diukur dan dibandingkan dengan pakan ikan tenggelam dan terapung komersial. Hasil menunjukkan bahwa proses fermentasi serta metode pengecilan dimensi yang digunakan menghasilkan pakan yang memiliki massa jenis lebih rendah, serta stabilitas air, daya serap air, daya apung, serta ketahanan benturan lebih tinggi dibandingkan dengan pakan tenggelam komersial yang digunakan sebagai substrat fermentasi. Namun, nilai hidrofobisitas semua pakan yang diuji adalah sama. Daya apung pakan fermentasi dalam penelitian ini jauh lebih tinggi daripada penelitian sebelumnya.Kata Kunci: daya apung, daya serap air, stabilitas dalam air, pakan apung, pakan tenggelam

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6

Yin, Wan Zhong, Qiang Li, and Ying Qiang Ma. "Flotation Research on Dolomite-Containing Magnesite Ore." Advanced Materials Research 158 (November 2010): 113–24. http://dx.doi.org/10.4028/www.scientific.net/amr.158.113.

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China has the largest magnesite reserve in the world. However, the high-grade magnesite resources are decreasing significantly with the development of the resources’ consumption. The treatment of the low-grade magnesite ore is becoming more important and of much interest to researchers. In this paper, the floatability of several pure minerals including magnesite, dolomite, and quartz and their interactions when using different collectors were investigated. In the flotation system of lauryl amine, compared with magnesite, the floatability of dolomite was higher, but was much lower than quartz. In the flotation system of sodium oleate, magnesite and dolomite had good floatability but quartz could hardly be floated. Sodium hexametaphosphate inhibited dolomite more strongly than magnesite. When pH was above 9, the inhibitory effect on two minerals was attenuated, and in the pH range of 9~12, the inhibitory effect of sodium silicate on dolomite was very strong, while magnesite still had good floatability. Magnesite and dolomite crystal structure similar and the mass contents of surface oxygen were respectively 52.42, 48.65. relative density that was the ratio of metal cation to anion （∑Mn+/∑O2-）, respectively: 0.3264,0.4327. The mass contents of surface oxygen and relative density affected the surface electric properties, and therefore the isoelectric point of dolomite was higher in solution.Based on crystal chemistry formulas, the Mn+-O2- bond parameters were calculated. The electronegativity of O linked with Ca in dolomite was much higher than that linked with Mg in magnesite and dolomite. Because of the strong electrostatic forces, the floatability of dolomite was higher in the flotation system of lauryl amine. As the solubility product of calcium oleate is bigger, the floatability of dolomite which compared to magnesite is much higher in the flotation system of sodium oleate. After the flotation experiments of pure minerals, a novel flotation system for recovering magnesite concentrate from low-grade magnesite ore was developed. For run-of-mine ore produced in Liaoning China, the results of flotation experiments showed that a magnesite concentrate containing 46.94 percent MgO, 0.30 percent SiO2, 0.76 percent CaO can be produced and 76.02 percent of the magnesite can be recovered through the process.

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7

Park, Ilhwan, Seunggwan Hong, Sanghee Jeon, Mayumi Ito, and Naoki Hiroyoshi. "Flotation Separation of Chalcopyrite and Molybdenite Assisted by Microencapsulation Using Ferrous and Phosphate Ions: Part II. Flotation." Metals 11, no. 3 (March 7, 2021): 439. http://dx.doi.org/10.3390/met11030439.

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Porphyry-type deposits are the major sources of copper and molybdenum, and flotation has been adopted to recover them separately. The conventional reagents used for depressing copper minerals, such as NaHS, Na2S, and Nokes reagent, have the potential to emit toxic H2S gas when pulp pH was not properly controlled. Thus, in this study the applicability of microencapsulation (ME) using ferrous and phosphate ions as an alternative process to depress the floatability of chalcopyrite was investigated. During ME treatment, the use of high concentrations of ferrous and phosphate ions together with air introduction increased the amount of FePO4 coating formed on the chalcopyrite surface, which was proportional to the degree of depression of its floatability. Although ME treatment also reduced the floatability of molybdenite, ~92% Mo could be recovered by utilizing emulsified kerosene. Flotation of chalcopyrite/molybdenite mixture confirmed that the separation efficiency was greatly improved from 10.9% to 66.8% by employing ME treatment as a conditioning process for Cu-Mo flotation separation.

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8

Kang, Duan, and Jian Hua Chen. "Effects of Galvanic Interaction on Collectorless Flotation Behavior of Galena and Pyrite." Advanced Materials Research 402 (November 2011): 514–17. http://dx.doi.org/10.4028/www.scientific.net/amr.402.514.

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Galvanic interactions between sulfide minerals have significant effects on their electrochemistry and flotation behavior. The effects of galena and pyrite on their collectorless flotation behavior have been studied in this paper. The results showed that galvanic interaction between galena and pyrite would occur when they were mixed. In the galvanic-couple , pyrite forms a cathode due to the higher rest potential, and is reduced, which results in its floatability decreased; while galena forms a anode due to the lower rest potential, and is oxidized, which results in its floatability increased.

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9

Welsby, S. D. D., S. M. S. M. Vianna, and J. P. Franzidis. "Assigning physical significance to floatability components." International Journal of Mineral Processing 97, no. 1-4 (November 2010): 59–67. http://dx.doi.org/10.1016/j.minpro.2010.08.002.

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10

Guo, H., and W. T. Yen. "Pulp potential and floatability of chalcopyrite." Minerals Engineering 16, no. 3 (March 2003): 247–56. http://dx.doi.org/10.1016/s0892-6875(03)00015-3.

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11

Suicmez, T., and S. Kizgut. "Coal Floatability Characterization by Film Flotation." Energy Sources, Part A: Recovery, Utilization, and Environmental Effects 32, no. 19 (August 4, 2010): 1801–11. http://dx.doi.org/10.1080/15567030902882943.

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12

Rong, Guoqiang, Mengdi Xu, Dongyue Wang, Xiahui Gui, and Yaowen Xing. "Effect of Heating Oxidation on the Surface/Interface Properties and Floatability of Anthracite Coal." Processes 7, no. 6 (June 6, 2019): 345. http://dx.doi.org/10.3390/pr7060345.

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Oxidation processes of coal surfaces are both fundamental and interesting from academic and engineering points of view. In this work, we comprehensively analyzed the mechanism of heating oxidation at 200 °C on the surface/interface characters and the floatability of anthracite coal. The variations of surface/interface characters were studied using SEM (scanning electron microscopy), FTIR (Fourier transform infrared spectroscopy), and XPS (X-ray photoelectron spectroscopy). The floatability was further identified using Induction Time and Bubble-Particle Wrap Angle. It was found that, after heating oxidation at 200 °C, both surface ravines and oxygen-containing groups were increased. The degradation of hydroxyl on anthracite could be neglected during the heating, while the oxidation of hydrocarbon chains dominated the balance of hydrophobicity and hydrophilicity on coal surface. The induction time significantly increased from 200 ms to 1200 ms and 2000 ms after 10 h and 20 h of heating oxidation at 200 °C, respectively. Additionally, raw coal exhibited the fastest kinetics of bubble-particle attachment and the largest wrap angle, directly proving that the floatability decreased after oxidation.

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13

Zhang, Qi Dong, Xiao Li Li, Wen Ping Zhang, and Kun Song. "Study on Wetting Behavior and Flotation Separation of Talc from Molybdenite of Non-Polar Surface Minerals." Key Engineering Materials 777 (August 2018): 282–86. http://dx.doi.org/10.4028/www.scientific.net/kem.777.282.

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Molybdenite and talc were selected as research object in paper and crystal structure, interaction between H2O molecule and minerals surfaces, surface wettability, flotation behavior were studied by density functional theory method and flotation experiments. The results showed that molybdenite and talc were layered minerals which exhibited similar surface wettability. H2O molecule had hardly effect with molybdenite or talc and H2O molecule prefers to stay with water rather than the minerals surfaces. The reason why talc interferes with the flotation molybdenite has been revealed. The flotation results showed that good floatability of talc was the key factor causing a low grade of concentrate in alkaline solution. Thus, it is the key factor to enlarge floatability difference between molybdenite and talc.

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14

Liu, Hang, Wenqing Zhao, Jihua Zhai, Xiaolong Lu, Pan Chen, Xi Ren, Wei Sun, Chenyang Zhang, Wei Chen, and Si Wan. "Activation Mechanism of Lead(II) to Ilmenite Flotation Using Salicylhydroxamic Acid as Collector." Minerals 10, no. 6 (June 24, 2020): 567. http://dx.doi.org/10.3390/min10060567.

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In this study, salicylhydroxamic acid (SHA), which exhibits superior flotation performance to conventional collector benzohydroxamic acid (BHA), was first introduced in ilmenite flotation. The addition of lead(II) can significantly increase the recovery of ilmenite using SHA as collector. Thus, the adsorption mechanism of SHA on lead(II)-activated ilmenite surface was systematically studied using micro-flotation tests, adsorption analysis, zeta potential measurements, Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). Micro-flotation results revealed that SHA had stronger collecting ability than BHA, and ilmenite floatability could be activated by lead ions with either SHA or BHA as collector. Ilmenite showed good floatability at pH 6–8 (over 90% recovery) in the presence of Pb2+ and SHA. In such conditions, the main lead species of Pb(OH)+ and Pb2+ acted as active sites and caused positive surface potential shifts, thereby increasing the adsorbed amounts of negatively charged SHA on the surface of the mineral. FTIR and XPS analyses suggested that the lead species was chemically adsorbed on the surface of ilmenite to form active sites chelated by SHA. Moreover, the free lead ions in solution might form the Pb–SHA complexes to adsorb on the mineral surface, thereby increasing the floatability of ilmenite.

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15

Nagaoka, Toru, Naoya Ohmura, and Hiroshi Saiki. "A Novel Mineral Flotation Process UsingThiobacillus ferrooxidans." Applied and Environmental Microbiology 65, no. 8 (August 1, 1999): 3588–93. http://dx.doi.org/10.1128/aem.65.8.3588-3593.1999.

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ABSTRACT Oxidative leaching of metals by Thiobacillus ferrooxidans has proven useful in mineral processing. Here, we report on a new use for T. ferrooxidans, in which bacterial adhesion is used to remove pyrite from mixtures of sulfide minerals during flotation. Under control conditions, the floatabilities of five sulfide minerals tested (pyrite, chalcocite, molybdenite, millerite, and galena) ranged from 90 to 99%. Upon addition of T. ferrooxidans, the floatability of pyrite was significantly suppressed to less than 20%. In contrast, addition of the bacterium had little effect on the floatabilities of the other minerals, even when they were present in relatively large quantities: their floatabilities remained in the range of 81 to 98%. T. ferrooxidans thus appears to selectively suppress pyrite floatability. As a consequence, 77 to 95% of pyrite was removed from mineral mixtures while 72 to 100% of nonpyrite sulfide minerals was recovered. The suppression of pyrite floatability was caused by bacterial adhesion to pyrite surfaces. When normalized to the mineral surface area, the number of cells adhering to pyrite was significantly larger than the number adhering to other minerals. These results suggest that flotation with T. ferrooxidans may provide a novel approach to mineral processing in which the biological functions involved in cell adhesion play a key role in the separation of minerals.

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16

Wang, Hui, Chong-qing Wang, and Jian-gang Fu. "Floatability of polymer materials modulated by frothers." Waste Management 33, no. 12 (December 2013): 2623–31. http://dx.doi.org/10.1016/j.wasman.2013.09.003.

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17

Montes, S., and G. Montes Atenas. "Hematite floatability mechanism utilizing tetradecylammonium chloride collector." Minerals Engineering 18, no. 10 (August 2005): 1032–36. http://dx.doi.org/10.1016/j.mineng.2005.01.016.

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18

Chibowski, E., and L. Holysz. "Surface Free Energy and Floatability of Minerals." Materials Science Forum 25-26 (January 1988): 521–24. http://dx.doi.org/10.4028/www.scientific.net/msf.25-26.521.

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19

Forssberg, Eric, Stellan Sundberg, and Zhai Hongxin. "Influence of different grinding methods on floatability." International Journal of Mineral Processing 22, no. 1-4 (April 1988): 183–92. http://dx.doi.org/10.1016/0301-7516(88)90063-4.

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20

Wang, Zhecun, Jianlin Yang, Shiyu Song, Jing Guo, Jifu Zheng, Tauqir A. Sherazi, Shenghai Li, and Suobo Zhang. "Patterned, anti-fouling membrane with controllable wettability for ultrafast oil/water separation and liquid–liquid extraction." Chemical Communications 56, no. 80 (2020): 12045–48. http://dx.doi.org/10.1039/d0cc04804f.

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A novel liquid-infused patterned porous membrane system exhibits excellent interfacial floatability at the oil–water interface as a separator, providing high performance and convenient separation of liquids.

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21

Wang, Zhecun, Xiaoqiu Liu, Jing Guo, Tauqir A. Sherazi, Suobo Zhang, and Shenghai Li. "A liquid-based Janus porous membrane for convenient liquid–liquid extraction and immiscible oil/water separation." Chemical Communications 55, no. 96 (2019): 14486–89. http://dx.doi.org/10.1039/c9cc07593c.

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A novel liquid-based Janus porous membrane system with self-gating abilities, improved interfacial floatability is used for the practical applications of liquid–liquid extraction and oil/water separation with antifouling behavior.

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22

Milanovic, Dragan, and Zoran Markovic. "Zeta-potential and flotability of the scheelite mineral in different type of waters, Part 2: Flotability." Chemical Industry 63, no. 5 (2009): 377–85. http://dx.doi.org/10.2298/hemind0905377m.

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The aim of this work was to study floatability of the mineral sheelite from mine 'Rudnik', central Serbia. Flotation tests of the mineral in a Hallimond tube cell were carried out in four different types of water, namely: tap water, distilled water, rain water and spring water. All types of water had different hardness and conductivity as well as natural pH values. It was found that the flotability of mineral scheelite depends on the hardness and electro-conductivity of the chosen type of water as well as on Ca2+ content. Also, it was found the floatability of mineral depends on the scheelite particle size fraction used in microflotation experiments. Presented results may be useful for proper selection of type of water, as well of the type of reagents used in flotation processes.

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23

Han, Jiahong, Xiaoan Li, Shujuan Dai, and Guozhen Liu. "The Flotation Separation of Magnesite and Limonite Using an Amine Collector." Adsorption Science & Technology 2021 (March 6, 2021): 1–12. http://dx.doi.org/10.1155/2021/5534274.

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In order to reduce the iron impurities in magnesite ore and improve the purity of magnesium products, the difference in floatability between magnesite and limonite has been studied by using mixtures with a collecting agent—KD (cationic amine collectors, containing soluble components). Sodium hexametaphosphate, pH, sodium silicate, and sodium carboxymethyl cellulose were used as regulators. Adsorption mechanisms of the reagents on minerals were analyzed by a zeta potential analyzer and infrared spectroscopy. Sodium silicate increased the floatability of both minerals at 11.6. All the three regulators reduced the zeta potential of both minerals, while KD increased the zeta potential of magnesite and decreased the zeta potential of limonite. All the three regulators were likely chemically adsorbed on the surface of both minerals; KD has electrostatic adsorption on the surface of the minerals.

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24

Li, Mingyang, Jun Liu, Xiangpeng Gao, Yiming Hu, Xiong Tong, Fugang Zhao, and Qidong Yuan. "Surface Properties and Floatability Comparison of Aegirite and Specularite by Density Functional Theory Study and Experiment." Minerals 9, no. 12 (December 13, 2019): 782. http://dx.doi.org/10.3390/min9120782.

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Understanding the differences in surface properties between aegirite and specularite is of great significance to study their separation. In this work, the surface properties of aegirite and specularite, as well as their relationships to floatability, have been explored by first principle calculation, flotation, and Zeta potential measurement. The surface relaxation indicated that the specularite (001) surface appeared to show more surface reconstruction. The unsatisfied bond properties, Mulliken bond population, and surface charge showed that the floatability of specularite was superior to that of aegirite. The flotation results showed that the hydrophobicity of specularite was higher than that of aegirite with dodecylamine (DDA) as the collector. It is infeasible to separate specularite from aegirite by flotation using starch as the depressant, and research of effective reagents with high affinity to the element Si is the subclinical breakthrough point of specularite/aegirite separation.

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25

Feng, Qi Cheng, Shu Ming Wen, Wen Juan Zhao, Ci Yun Chen, and He Fei Zhao. "Recovery of Molybdenum from Molybdenum Ore with a High Content of Carbon by Separating Carbon from Sulfur." Advanced Materials Research 634-638 (January 2013): 3450–53. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.3450.

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The study was aimed to recover molybdenum minerals from molybdenum ore with a high content of carbon by flotation process. The material belonged to a kind of refractory molybdenum ore from which molybdenum minerals could not be extracted effectively using traditional beneficiation and metallurgy, because of their similar floatability between carbon minerals and molybdenite and complex intergrowth. Based on the research on the properties of the material and lots of experiments, the carbon-molybdenum bulk flotation experiment was firstly carried out to concentrate molybdenum, and then some potassium permanganate and lime were added in carbon-molybdenum bulk flotation products to inhibit sulfide minerals along with appropriate air agitation. Under such a condition, the floatability of sulfide minerals was weakened and carbon was separated from sulfur. Then carbon concentrate and sulfur concentrate were used to extract molybdenum through metallurgy respectively.

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Matos, Vanderson Eney de, Antônio Eduardo Clark Peres, Carlos Alberto Pereira, and Stephânia da Consolação Silva Nogueira. "Analysis of quartz floatability using design of experiments." REM - International Engineering Journal 72, no. 3 (September 2019): 501–6. http://dx.doi.org/10.1590/0370-44672018720080.

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27

Newell, A. J. H., W. M. Skinner, and D. J. Bradshaw. "Restoring the floatability of oxidised sulfides using sulfidisation." International Journal of Mineral Processing 84, no. 1-4 (October 2007): 108–17. http://dx.doi.org/10.1016/j.minpro.2006.08.002.

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28

Suyantara, Gde Pandhe Wisnu, Tsuyoshi Hirajima, Hajime Miki, and Keiko Sasaki. "Floatability of molybdenite and chalcopyrite in artificial seawater." Minerals Engineering 115 (January 2018): 117–30. http://dx.doi.org/10.1016/j.mineng.2017.10.004.

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29

Li, Shulei, Lihui Gao, Junchao Wang, Guoqiang Rong, and Yijun Cao. "Enhancement of floatability of low-rank coal using oxidized paraffin soap." RSC Advances 10, no. 26 (2020): 15098–106. http://dx.doi.org/10.1039/d0ra02361b.

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Flotation of low-rank coal has suffered poor flotation efficiency with hydrocarbon oils unless at an even high dosage. The both addition of OPS and DO achieved better floatability of low-rank coal than that of OPS and DO as collector solely.

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30

Huang, Can, Gang Wen, Jinxia Huang, and Zhiguang Guo. "A different wettable Janus material with universal floatability for anti-turnover and lossless transportation of crude oil." New Journal of Chemistry 43, no. 38 (2019): 15213–21. http://dx.doi.org/10.1039/c9nj03772a.

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Flower-like TiO₂ particles were prepared to endow diverse materials with the ability of steady floatability and anti-turnover on different liquids. This strategy was applied in the design of a promising way for lossless transportation of crude oil via sea.

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Pecina-Treviño, E. T., G. T. Ramos-Escobedo, P. M. Gallegos-Acevedo, F. J. López-Saucedo, and E. Orrantia-Borunda. "Bioflotation of sulfide minerals with Acidithiobacillus ferrooxidans in relation to copper activation and surface oxidation." Canadian Journal of Microbiology 58, no. 9 (September 2012): 1073–83. http://dx.doi.org/10.1139/w2012-072.

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Surface oxidation of sulfides and copper (Cu) activation are 2 of the main processes that determine the efficiency of flotation. The present study was developed with the intention to ascertain the role of the phenomena in the biomodification of sulfides by Acidithiobacillus ferrooxidans culture (cells and growth media) and their impact in bioflotation. Surface characteristics of chalcopyrite, sphalerite, and pyrrhotite, alone and in mixtures, after interaction with A. ferrooxidans were evaluated. Chalcopyrite floatability was increased substantially by biomodification, while bacteria depressed pyrrhotite floatability, favoring separation. The results showed that elemental sulfur concentration increased because of the oxidation generated by bacterial cells, the effect is intensified by the Fe(III) left in the culture and by galvanic contact. Acidithiobacillus ferrooxidans culture affects the Cu activation of sphalerite. The implications of elemental sulfur concentration and Cu activation of sphalerite are key factors that must be considered for the future development of sulfide bioflotation processes, since the depressive effect of cells could be counteracted by elemental sulfur generation.

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32

OWADA, Shuji, and Taneomi HARADA. "Surface Charge and Floatability of Chromites from Various Localities." Journal of the Mining Institute of Japan 104, no. 1204 (1988): 381–86. http://dx.doi.org/10.2473/shigentosozai1953.104.1204_381.

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HARADA, Taneomi, and Nobuyuki KUNIYOSHI. "Effects of Bacterial Oxidation on the Floatability of Pyrite." Journal of the Mining Institute of Japan 101, no. 1173 (1985): 719–24. http://dx.doi.org/10.2473/shigentosozai1953.101.1173_719.

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Chizhevsky, Vladimir B., Natalia V. Fadeeva, and Natalia V. Gmyzina. "Floatability of graphite with hydrocarbons and oxygen containing compounds." Vestnik of Nosov Magnitogorsk State Technical University 16, no. 3 (September 26, 2018): 5–16. http://dx.doi.org/10.18503/1995-2732-2018-16-3-5-16.

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35

Petukhov, V. N., N. Yu Svechnikova, O. V. Kuklina, A. S. Puzina, T. N. Akhmetzyanov, and Ya V. Gavryushina. "Effect of finely-dispersed coal sludges on their floatability." Scientific and Technical Journal of Information Technologies, Mechanics and Optics 19, no. 5 (October 1, 2019): 840–47. http://dx.doi.org/10.17586/2226-1494-2019-19-5-840-847.

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36

Hirajima, T., A. Bissombolo, K. Sasaki, K. Nakayama, H. Hirai, and M. Tsunekawa. "Floatability of rare earth phosphors from waste fluorescent lamps." International Journal of Mineral Processing 77, no. 4 (December 2005): 187–98. http://dx.doi.org/10.1016/j.minpro.2005.05.002.

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Ma, Xiaodong, and Marek Pawlik. "The effect of lignosulfonates on the floatability of talc." International Journal of Mineral Processing 83, no. 1-2 (July 2007): 19–27. http://dx.doi.org/10.1016/j.minpro.2007.03.007.

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38

Min, Xiao-Bo, Cui-Yu Yuan, Li-Yuan Chai, Yan-Jie Liang, Hai-Jing Zhang, Xian-de Xie, and Yong Ke. "Hydrothermal modification to improve the floatability of ZnS crystals." Minerals Engineering 40 (January 2013): 16–23. http://dx.doi.org/10.1016/j.mineng.2012.09.012.

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39

Guven, O., O. Ozdemir, I. E. Karaagaclioglu, and M. S. Çelik. "Surface morphologies and floatability of sand-blasted quartz particles." Minerals Engineering 70 (January 2015): 1–7. http://dx.doi.org/10.1016/j.mineng.2014.08.007.

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Xian, Yongjun, Yijie Wang, Shuming Wen, Qi Nie, and Jiushuai Deng. "Floatability and oxidation of pyrite with different spatial symmetry." Minerals Engineering 72 (March 2015): 94–100. http://dx.doi.org/10.1016/j.mineng.2014.12.016.

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BUJNOWSKA, BOŻENA. "Studies on Floatability of Petrographic Constituents of Subbituminous Coal." Coal Preparation 1, no. 2 (January 1985): 169–88. http://dx.doi.org/10.1080/07349348508945547.

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Alexander, D. J., and R. D. Morrison. "Rapid estimation of floatability components in industrial flotation plants." Minerals Engineering 11, no. 2 (February 1998): 133–43. http://dx.doi.org/10.1016/s0892-6875(97)00146-5.

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El-Midany, Ayman A., Hassan El-Shall, and Spyros Svoronos. "Modeling the PVA-coated dolomite floatability in acidic media." Powder Technology 209, no. 1-3 (May 2011): 25–28. http://dx.doi.org/10.1016/j.powtec.2011.01.022.

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Lazic, P., D. Niksic, R. Tomanec, D. Vucinic, and L. Cveticanin. "Chalcopyrite Floatability in Flotation Plant of the Rudnik Mine." Journal of Mining Science 56, no. 1 (January 2020): 119–25. http://dx.doi.org/10.1134/s1062739120016552.

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Corona-Arroyo, M. A., A. López-Valdivieso, and S. Song. "Contact angle and vacuum floatability of ultrafine size particles." Separation Science and Technology 53, no. 6 (November 27, 2017): 999–1005. http://dx.doi.org/10.1080/01496395.2017.1405981.

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46

Hołysz, Lucyna. "Surface free energy and floatability of low-rank coal." Fuel 75, no. 6 (May 1996): 737–42. http://dx.doi.org/10.1016/0016-2361(95)00299-5.

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47

Marmur, Abraham, Weiliam Chen, and George Zografi. "Characterization of particle wettability by the measurement of floatability." Journal of Colloid and Interface Science 113, no. 1 (September 1986): 114–20. http://dx.doi.org/10.1016/0021-9797(86)90211-0.

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48

Gulden, S. J., C. Riedele, S. Mueller, M. H. Kopf, and H. Nirschl. "Combining small-scale screening methods to predict microorganism floatability." Chemical Engineering Science 207 (November 2019): 1353–63. http://dx.doi.org/10.1016/j.ces.2019.07.027.

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49

Arancibia-Bravo, María P., Alejandro López-Valdivieso, Luís F. Flores, and Luís A. Cisternas. "Effects of Potassium Propyl Xanthate Collector and Sodium Sulfite Depressant on the Floatability of Chalcopyrite in Seawater and KCl Solutions." Minerals 10, no. 11 (November 9, 2020): 991. http://dx.doi.org/10.3390/min10110991.

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This study demonstrates the effects of a potassium propyl xanthate (PPX) collector and sodium sulfite (Na2SO3) depressant on pure chalcopyrite in synthetic seawater (SSW) and potassium chloride (KCl) solutions. SSW solutions with 35 g/L of salt and 0.01-M KCl were used for microflotation and zeta potential tests. Particles sized between 200# and 100# (75–150 µm) were used, and the pH was between 8.0 and 8.5. The surface of the mineral and its interaction with the collector were characterized using Raman spectrometry. The zeta potential of the chalcopyrite was measured in KCl solution at a pH range of 3–12 using the collector and depressant at a monodispersed particle size of 635# (20 µm). The results indicate that the floatability of chalcopyrite is not affected by the presence of PPX collectors in SSW solutions. SSW provides better recoveries than KCl solutions with values of 91.42% and 88.15%, respectively. The Na2SO3 depressant does not hinder the mineral floatability throughout the entire concentration range used; however, special care must be taken when adjusting the pH range to avoid increasing the zeta potential.

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Bahrami, Ataallah, Sajjad Chehreghani, Fatemeh Kazemi, Hamid Kazemi, Abdollah Forughirad, and Behnam Golizadeh. "THE MICROWAVE IRRADIATION EFFECT ON THE FLOATABILITY OF MIXED SULPHIDE/OXIDE COPPER ORES." Rudarsko-geološko-naftni zbornik 36, no. 4 (2021): 121–37. http://dx.doi.org/10.17794/rgn.2021.4.10.

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Pre-treatment of copper sulphide and oxide ores using microwave radiation causes a difference in their floatability through change in the surface properties of the minerals. The aim of this study is to investigate the behaviour of Sungun porphyry copper ore under the influence of microwave radiation. In this regard, the feed sample of Sungun copper flotation circuit has been subjected to microwave irradiation for 0-120 s and a radiation power of 0-600 W. The prepared samples were then subjected to flotation experiments. According to the results, the grade of sulphide and oxide Cu minerals, as well as the grade of Fe, increased by microwave irradiation in all experiments compared to the non-irradiated samples. At the same time, recovery rate has a reversed trend and decreased in all cases. Variations in the recovery rates of copper oxides and sulphides due to microwave irradiation are different. Increasing the power of irradiation resulted in a greater reduction in the recovery of copper oxides than of sulphides. On the other hand, increasing the power of microwave irradiation reduced the amount of iron recovery in the copper concentrate and with an increase in the duration of microwave irradiation, the reduction of iron recovery values is even more pronounced. Changes in the power and duration of microwave radiation have not had a significant effect on variations in oxide copper grade in flotation tailings. While the grade of sulphides in tailing is affected by the parameters of microwave irradiation and with an increase in power and duration of microwave irradiation, the grade of copper in tailing increases.

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