2 edition of Competitive Adsorption of C14-Labelled Oleic Acid by Quartz and Hematitein Flotation Processes. found in the catalog.
Competitive Adsorption of C14-Labelled Oleic Acid by Quartz and Hematitein Flotation Processes.
Canada. Dept. of Mines and Technical Surveys. Mines Branch.
|Series||Canada Mines Branch Research Report -- 108|
Adsorption properties and column flotation were studied to investigate the interaction of the anionic and cationic collectors and flotation recoveries for talc mineral. Adsorption capacity is dependent on pH, adsorption time, temperature, collector concentration, and particle size. Langmuir adsorption model was suitable for describing isotherms. CAN OM UR and ALTINDAL/Turk J Phys Eq. (3) can be rearrangement to obtain a linear form: 1 e = 1 kCe 0 1 0; (4) where k = ka kd, 0 is the maximum monolayer adsorption capacity, Ce is unadsorbed gas molecule concentration in the gas phase, and e is the amount of adsorbed gas molecule per unit mass of sorbent. If we assume that the frequency shift in the QCM is proportional to the amount of Cited by: 1.
Keywords: flotation, adsorption, herbal extracts, modifying agents, sulfide minerals. Introduction. In the context of rapid involvement of. hard-to-beneficiate refractory ores with a low con-tent and fine impregnation of valuable components into the processing of complex non-ferrous and precious metals ores, the efficiency of the flotation. Flotation Tests Both the single mineral (3 g) microflotation and the artificial mixed mineral (3 g) flotation were conducted in a 40 mL hitch groove flotation cell with a spindle speed of r/min. The flotation machine for microflotation tests was shown in Figure 2. File Size: 2MB.
Handbook of Flotation Reagents: Chemistry, Theory and Practice is a condensed form of the fundamental knowledge of chemical reagents commonly used in flotation and is addressed to the researchers and plant metallurgists who employ these reagents. Consisting of three distinct parts: 1) provides detailed description of the chemistry used in mineral processing industry;5/5(2). Plane wave density functional theory (DFT) calculations have been performed to study the atomic structure, preferred H2O adsorption sites, adsorption energies, and vibrational frequencies for water adsorption on the α-quartz () surface. Surface energies and atomic displacements on the vacuum-reconstructed, hydrolyzed, and solvated surfaces have been calculated and compared with Cited by:
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Flotation recovery of quartz (A) and hematite (B) as a function of pH at fixed collector concentration (Fig 3B - Vidyadhar et al, ) The understanding of the mechanism of adsorption of the dissimilar surfactant mixtures can provide guidance for.
Lapointe, C.M., Competitive adsorption of C 14 labelled oleic acid by quartz and hematite in flotation processes. Mines Research Report RMines Branch.
Department of Mines and Technical Surveys, Ottawa, Canada. by: 7. Using pure quartz and hematite minerals, the adsorption mechanism of mixed cationic/anionic reagent schemes was investigated through Hallimond flotation studies. The flotation response of quartz and hematite independently with cationic and anionic collectors as well as with mixed cationic/anionic collector systems is assessed.
The flotation response as a function of pH and collector. Quartz is demonstrated to interact with oleic acid as a result of quartz surface activation expedited by metal hydroxyl complexes [Fe(OH) 2 + and Al(OH) 2 +] resulting from the presence of Fe and Al impurities in the quartz sample.
Maximum floatability of monazite was found to occur at pH 7 and 9, hematite at pH 9 and quartz pH Cited by: 7. It also discusses the microanalysis of flotation reagents and adsorption measurement. The book offers a valuable resource for all university researchers and students, as wells as R&D engineers in minerals processing and extractive metallurgy who wish to explore innovative reagents and technologies that lead to more energy efficient and.
Selective flotation of rare earth oxide from hematite and quartz mixtures using oleic acid as a collector adsorption of lauric acid, oleic acid, and stearic acid, the interfacial water Author: Keith Quast. flotation (hematite flotation) or indirect flotation (quartz flotation) tech-niques depending upon the nature of the available ore bodies.
In direct flota-tion, iron bearing mineral, mostly hematite, is floated using oleate as collec-tor leaving siliceous gangue, usually quartz, in the tailings. Kick et al. . The adsorption mechanism of mixed cationic C12 amine and anionic sulfate / oleate reagent schemes was examined through Hallimond flotation studies using pure quartz and hematite minerals.
Specifically, the effect of oleic acid dosage (– g/t), depressants dosage (– g/t) and model ore grade (, 10 and wt.%) on flotation recovery of monazite was determined. Global demand and consumption of rare earth elements and compounds have led to increasing research to further our understanding of their beneficiation and recovery.
Monazite is the second-most important rare earth-bearing mineral that can be exploited. In this study, the surface chemistry of monazite in terms of zeta potential, adsorption density, and flotation responses using Cited by: 9.
This volume presents essential information on chemical reagents commonly used in flotation processes. It comprehensively summarizes the properties, preparation and applications of collectors, frothers, depressants and flocculants. It also discusses the microanalysis of flotation reagents and adsorption : Springer Singapore.
Pure mineral flotation experiments, zeta potential testing, and infrared spectroscopy were employed to investigate the interfacial reactions of oleic acid (collector), sodium dodecyl benzene sulfonate (SDBS, synergist), and rhodochrosite in an anionic system.
The pure mineral test shows that oleic acid has a strong ability to collect products on by: 4. Selective flotation of rare earth oxides from hematite and quartz mixtures using oleic acid as a collector. Contact angle measurements indicated adsorption of oleic acid onto the minerals' surfaces.
Zeta potential measurements were used to elucidate oleic acid adsorption mechanism onto the mineral particle by: 7. This paper describes the adsorption of the unsaturated fatty acids, oleic- linoleic- and linolenic acid onto steel coated quartz crystal surfaces from 2,2,4,4,6,8,8-heptamethylnonane as monitored by the quartz crystal microbalance (QCM) technique.
It is shown that addition of fatty acid to the oil results in changes in bulk density and viscosity and that these changes must be considered Cited by: Flotation results using oleic acid revealed that the maximum recovery of 90% occurs at pH 9 and g/t oleic acid.
Also, the quartz and calcite recoveries reached 26% and 87%, respectively, in the anionic flotation conditions. Abstract. The physical and chemical forms of sulfide mineral surfaces are reviewed. The initial surfaces and oxidation products have been studied by Scanning Auger Microscopy (SAM), X-ray Photoelectron Spectroscopy (XPS), Scanning Tunneling Microscopy (STM), Atomic Force Microscopy (AFM), Scanning Electron Microscopy (SEM) and Time-of-Flight Secondary Ion Mass Spectrometry Cited by: Flotation results using oleic acid revealed that the maximum recovery of 90% occurs at pH 9 and g/t oleic acid.
Also, the quartz and calcite recoveries reached 26% and 87%, respectively, in the anionic flotation conditions. Increasing amount of sodium silicate to g/t caused a decrease in the smithsonite recovery to 87% and also Cited by: The flotation recovery of quartz is shown to decrease with increase in pulp pH and remained less than 30% at all the pulp pH investigated.
An increase in pulp pH from 3 to 9 resulted in decrease in both maximum flotation recovery and flotation rate of quartz by 25–8% and – min −1, respectively.
However, at pH 11, quartz flotation Cited by: 8. Adsorption mechanism of mixed anionic/cationic collectors in Muscovite – Quartz flotation system Article in Minerals Engineering –50 October with Reads How we measure 'reads'.
The Role of Adsorption in the Adsorbing Colloid Flotation of Anions. PhD Thesis. Swinburne University of Technology. Giulia Angerosa. page i specifically dodecanoic acid was then found to significantly change the adsorption Site Binding and its Role in Adsorption Processes –––––.––––– Author: Julia Angerosa.
This book summarizes the author’s findings on the functional principle of flotation reagents, gathered over the past few decades.
The fundamentals of and approaches common to surface chemistry are applied to study the reagents’ structure and performance, as well as their interaction with : Springer Singapore.Flotation and adsorption of quaternary ammonium cationic collectors on diaspore and kaolinite JIANG Hao, XU Long-hua, HU Yue-hua, WANG Dian-zuo, LI Chang-kai, MENG Wei, WANG Xing-jie School of Resources Processing and Bioengineering, Central South University, ChangshaChina Received 18 November ; accepted 15 May The adsorption mechanism of mixed cationic C 12 amine and anionic sulfate / oleate reagent schemes was examined through Hallimond flotation studies using pure quartz and hematite minerals.
The flotation response of both quartz and hematite with cationic and anionic collectors in isolation and with mixed cationic / anionic collector systems was evaluated as by: