Influence of bromine modification on collecting property of lauric acid

Zhu, Yimin; Luo, Binbin; Sun, Chunbao; Li, Yanjun; Han, Yuexin

doi:10.1016/j.mineng.2015.05.006

Cited by 23 publications

(11 citation statements)

References 28 publications

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“…Ogata, et al [37] found that the saturated fatty acids modified by introducing a chlorine atom to the α-carbon position could improve their solubility. More recently, Zhu, et al [38] introduced a bromine atom to the α-carbon position of lauric acid to improve its solubility, and the results suggested that the newly synthesized collector exhibited good activity at a relatively low flotation temperature (15 °C). Similarly, Luo, et al [39] synthesized a new collector by introducing a bromine atom to the α-carbon position of decanoic acid, and they found The adsorption of oleate ions on the activated quartz surface is considered chemisorption via forming covalent bonding.…”

Section: Minerals 2020 10 X For Peer Review 4 Of 22mentioning

confidence: 99%

Collecting Agent–Mineral Interactions in the Reverse Flotation of Iron Ore: A Brief Review

et al. 2020

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Froth flotation has been widely used in upgrading iron ores. Iron ore flotation can be performed in two technical routes: direct flotation of iron oxides and reverse flotation of gangue minerals with depression of iron oxides. Nowadays, reverse flotation is the most commonly used route in iron ore flotation. This review is focused on the reverse flotation of iron ores, consisting of reverse cationic flotation and reverse anionic flotation. It covers different types of collecting agents used in reverse iron ore flotation, the surface characteristics of minerals commonly present in iron ores (e.g., iron oxides, quartz, alumina-bearing minerals, phosphorus-bearing minerals, iron-bearing carbonates, and iron-bearing silicates), and the adsorption mechanisms of the collecting agents at the mineral surface. The implications of collecting agent–mineral interactions for improving iron ore flotation are discussed.

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Section: Minerals 2020 10 X For Peer Review 4 Of 22mentioning

confidence: 99%

Collecting Agent–Mineral Interactions in the Reverse Flotation of Iron Ore: A Brief Review

et al. 2020

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“…Moreover, the deconvoluted Fe 3p spectra for electrons on the surfaces of Fe-6.5wt.%Si/SiO2 C-S particles after deposition for 1920 s is shown in Supplementary Figure S2. Four Si 2p peaks at electron binding energies of 102.54 eV, 103.31 eV, 103.84 eV, and 104.07 eV [32,33] are visible in the deconvoluted Si spectrum of Fe-6.5wt.%Si/SiO 2 C-S particles after deposition for 1920 s, as shown in Figure 4e. According to the 29 Si magic angle spinning nuclear magnetic resonance (MAS NMR) and chemical kinetics results [34][35][36], there are four categories of Si groups with different oxidation states during thermal decomposition of the C 8 H 20 O 4 Si precursor.…”

Section: Samples Crystal Size (Nm) Micro-strain (%) Lattice Constant (å)mentioning

confidence: 92%

Formation Process of the Integrated Core(Fe-6.5wt.%Si)@Shell(SiO2) Structure Obtained via Fluidized Bed Chemical Vapor Deposition

Cheng

Jia

et al. 2020

Metals

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As electromagnetic functional materials, soft magnetic composites (SMCs) have great potential for applications in high-energy electromagnetic conversion devices. The most effective way to optimize the performance of an SMC is to incorporate it into insulated ferromagnetic core-shell particles with high structural uniformity and integrity. Fluidized bed chemical vapor deposition (FBCVD) is a facile and efficient technique for the synthesis of ferromagnetic/SiO2 core-shell particles. However, the formation mechanism and conditions of integrated ferromagnetic/SiO2 core-shell structures during the FBCVD process are not fully understood. On this basis, the formation process and the deposition time required for transformation of the Fe-6.5wt.%Si substrate into the Fe-6.5wt.%Si/SiO2 composite, and finally into the Fe-6.5wt.%Si/SiO2 core-shell structure, were investigated. Deposition of the insulative SiO2 coating onto the Fe-6.5wt.%Si particles was described by the three-dimensional island nucleation theory. The SiO2 islands were initially concentrated in rough areas on the Fe-6.5wt.%Si particle substrates owing to the lower heterogeneous nucleation energy. Deposition for at least 960 s was necessary to obtain the integrated ferromagnetic/SiO2 core-shell structure. The uniformity, integrity, and thickness of the insulative SiO2 coating increased with the increasing deposition time. The results in this study may provide a foundation for future kinetics investigations and the application of FBCVD technology.

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“…The binding energy scale was corrected based on a C1s peak from contaminations (around 284.8 eV) as the internal binding energy standard [19]. The prepared samples were dried in a vacuum oven at room temperature for 24 h. Figure 3 shows the effect of NaOL dosage on the flotation recoveries of magnesite and dolomite.…”

Section: Xps Measurementsmentioning

confidence: 99%

Elimination of the Adverse Effect of Calcium Ion on the Flotation Separation of Magnesite from Dolomite

et al. 2017

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Abstract:The separation of magnesite from dolomite was studied by flotation tests, X-ray photoelectron spectroscopy (XPS), and zeta potential measurements in the presence of calcium ion (Ca 2+ ) dissolved from dolomite. Sodium oleate (NaOL) was used as collector, and sodium carbonate (Na 2 CO 3 ) and sodium hexametaphosphate (SH) were used as regulators. The results showed that SH had a good selective inhibition ability in pure mineral flotations of magnesite and dolomite. While in the presence of Ca 2+ dissolved from dolomite, magnesite and dolomite were both inhibited by SH. The separation of magnesite from dolomite cannot be realized because Ca 2+ can adsorb on the surface of magnesite in the form of CaCO 3 and change the surface properties of magnesite. Thus, the magnesite flotation was depressed. When the sequence of reagent addition was changed to add SH prior to Na 2 CO 3 , a complex was made by Ca 2+ reacting with SH, which avoided the adsorption of Ca 2+ on the magnesite surface and prevented the changing of the magnesite's surface properties. Then, after adjusting the solution pH with Na 2 CO 3 , the flotation separation of magnesite from dolomite could be achieved.

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Influence of bromine modification on collecting property of lauric acid

Cited by 23 publications

References 28 publications

Collecting Agent–Mineral Interactions in the Reverse Flotation of Iron Ore: A Brief Review

Collecting Agent–Mineral Interactions in the Reverse Flotation of Iron Ore: A Brief Review

Formation Process of the Integrated Core(Fe-6.5wt.%Si)@Shell(SiO2) Structure Obtained via Fluidized Bed Chemical Vapor Deposition

Elimination of the Adverse Effect of Calcium Ion on the Flotation Separation of Magnesite from Dolomite

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