- منطقة بودونغ الجديدة ، شنغهاي ، الصين .
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Depressant plays an important role in the reverse flotation separation of iron ores. • Biodegradable reagents can be effectively used as depressants in reverse hematite flotation. • Polysaccharides and polyphenolics are promising green depressants for hematite. • H-bonding is the most common adsorption mechanism between iron and …
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The results of a number of comparative flotation characteristics of hematite flotation using the 18-carbon fatty acids are summarised in Table 2.The general trend was that the unsaturated fatty acids were stronger collectors for hematite compared with stearic acid, with an increased amount of double bonds/molecule often giving higher flotation …
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The maximum flotation recovery of monazite (91%) occurred at pH 7, beyond which monazite floatability decreased. Hematite flotation recoveries were higher than that of monazite at pH 3, 5, and 11. However, it can also be observed that the collecting ability ofon quartz mineral was poor, with quartz recovery decreasing with …
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In this study, ozone as an eco-friendly oxidant was employed to improve the depressive performance of starch in the reverse flotation of fine hematite. Micro-flotation results showed that ozone-oxidized starch (OS) better depressed hematite flotation as compared to the native starch (NS).
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Graphical abstract. The adsorption mechanism of mixed cationic C 12 amine and anionic sulphate/oleate collectors was investigated on hematite through Hallimond flotation studies. It is the first time that the hematite flotation results show an increased adsorption of cationic collector in the presence of anionic collector apart from its own co …
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It is essential to investigate flotation behavior of siderite-hematite-quartz for processing those iron ores. To this end, flotation of the three pure minerals was carried out in sodium oleate system in this work. Flotation theory mainly consists of flotation solution chemistry, interfacial chemistry and flotation kinetics [18]. All the ...
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The cation reverse flotation is a widely used method in improving the grade of iron ore concentrate, but hematite depressant is the key. In this work, the flotation behavior of hematite and quartz using the complex of Fe(III) and xanthan gum (Fe(III)-XG) as depressant was investigated via micro-flotation tests.
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Hematite flotation system integrated with nanobubble technology. 2.4. Multivariable design of flotation experiment: After the single factor flotation tests were completed in a previous work and major process parameters and their operational range were identified, statistical evaluation and optimization of reverse nanobubble hematite …
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The flotation of hematite using sodium dodecyl sulphate showed a high recovery for pH <6, a trough in recovery between pH 7 and 9, and a secondary maximum in recovery at pH 10. Different flotation behaviour was observed when sodium dodecyl benzyl sulphonate was used. Using ARMAC C, (a commercially available dodecyl ammonium …
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Reverse flotation of hematite from a local silica sand ore has been investigated using a batch, bench-scale mechanical flotation cell. The effects of various operating parameters such as type and concentration of collectors, type of acid, pH, conditioning time, solid-in-pulp concentration, particle size and temperature have been …
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Reverse flotation desilication with anionic collector sodium oleate (OL) and activator Ca 2+ is a common beneficiation method to purify hematite. Herein, the separation mechanism of hematite and quartz were systematically investigated by experiments and DFT calculations with the effect of surface hydroxylation fully considered.
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Based on the surface difference of hematite and quartz in solution, a hydroxyl-containing polyamine cationic surfactant was designed and screened with the assistant of computer simulation (molecular dynamics (MD) simulation and density functional theory (DFT) calculation) to enhance the separation efficiency in the reverse …
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In this work, the flotation behavior of hematite and quartz by curdlan in quartz-hematite reverse flotation separation and the selective depression mechanism of hematite were systematically studied through a series of experiments. On the basis of these results, we have drawn the following conclusions. 1.
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The current study found that the use of ultrasound-treated starch in the flotation separation of fine hematite and quartz better alleviated the loss of hematite to the froth products by, imparting higher surface wettability of hematite, and reducing the degree of entrainment of hematite. It was also revealed that ultrasonic treatment of starch ...
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Abstract: The effects of carbonate minerals (dolomite and siderite) on the flotation of hematite using sodium oleate as a collector were in- vestigated through flotation tests, supplemented by dissolution measurements, solution chemistry calculations, zeta …
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