Application of quaternary ammonium based ionic liquids as a novel flotation collector with low- viscosity of quartz has been investigated. The flotation behavior, performance and surface properties of quartz flotation with mono-2-ethylhexyl (2-Ethylhexyl)phosphonate-dodecyl trimethyl ammonium (P507-N12111) as collector were …
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Flotation was first performed in 1860 (Arbiter, 2000) and is a technology that utilizes the differences in physicochemical properties of various mineral surfaces to …
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An XFG-type flotation equipment with a 30-mL flotation cell was employed to explore flotation performances of malachite and quartz with or without SDA under various pH values. In each typical experiment, in a flotation cell, the pulp was prepared via adding single mineral of 2.0 g or binary minerals of 1 g quartz and 1 g malachite to 25 …
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The flotation recovery of quartz increased with increasing NaOL concentration, and the maximum flotation recovery of 70% of quartz was obtained at 2.0 × 10 −3 M NaOL concentration. Download: Download full-size image; Fig. 4. Flotation recovery as a function of NaOL concentration using 1.5 × 10 −4 M Fe(III) at pH 6–7.
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Using C12Giy as a flotation collector, it can effectively separate dolomite and quartz from collophane by reverse flotation. In addition, the potential adsorption mechanism of the amphoteric collector C12Giy was studied through zeta potential test, infrared spectroscopy and, XPS analysis. The main conclusions are as follows: (1)
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Search ScienceDirect. Minerals Engineering. Volume 182, 31 May 2022, 107589. ... Normally, anionic reagents including FAs are not suitable for quartz flotation (nonactivated quartz) for its negatively charged surface at all pH values. However, the adsorption of the VOCs on the surface of quartz was surprisingly captured in two …
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In cases where the contents of quartz in phosphate ores are excessively high, the direct flotation process for these phosphate ores using anionic collectors leads to the inclusions of fine-grained quartz particles in flotation concentrates, carried by the air bubbles within slurry, ultimately causing the reductions in the grades of apatite ...
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High-efficiency flotation of quartz under alkalescent conditions remains challenging owing to the leak of an effective activator. In this research, high quartz …
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Wash the treated quartz with ultrapure water several times until it was neutral, and dry it thoroughly in drying oven. High-purity hematite comes from South Africa. The sample was grounded to below 106um using a ball mill. A. Flotation study. The results of pure quartz flotation using ILs as collectors and DDA are shown in Fig. 1.
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In the pH range of 7 to 11, the flotation recovery of quartz increased slightly and remained below 5% overall. In particular, the difference in flotation recovery between hemimorphite and quartz at pH 7 reached a maximum of 97.07% (98.50% for hemimorphite and 1.43% for quartz). As a result, the SI of LS also reached a maximum of 67.58.
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The flotation consisted of the following steps: (1) 7.5 g of quartz sand sample was added into the flotation cell; (2) Ultra-pure deionized water was injected into the flotation cell to the graduation line; (3) A quantitative amount of collector was dropped into the mixture and it was stirred for 2 min to disperse the collector uniformly in the …
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The electrolytic flotation has mainly been used for small plants with capacity between 20 and 30 m 3 h −1. In dissolved air flotation, the bubbles are produced by controlling the …
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1. Introduction. Due to the excellent characteristics quartz is widely used in the production of glass, ceramic, refractory material, and optical communication (Ding, 2010).As one of the most abundant minerals in the earth's crust, quartz frequently associates with other minerals, such as feldspar, talc, pyrite, hematite, smithsonite, and …
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The flotation results of single minerals revealed that the reagents scheme of CMCS/DDA could be used in the reverse flotation of quartz from hematite. The flotation tests of mixed hematite and quartz in the mass ratio of 4:1 were carried out in the presence of 60 mg/L collector and 12 mg/L depressant at pH 8.
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Flotation performances of quartz and hematite as a function of slurry pH at optimum starch concentration (6.67 mg/L) and NHPA/DDA concentration (50.00 mg/L) are shown in Fig. 10. It shows that excellent flotation performance of quartz could be achieved when slurry pH ranged from 4.50 to 7.00, but it sharply decreased when slurry pH …
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High-efficiency flotation of quartz under alkalescent conditions remains challenging owing to the leak of an effective activator. In this research, high quartz flotation recovery was achieved with Ca 2+ and cationic/anionic mixed collectors under alkalescency, while activation mechanisms were systematically investigated. Micro …
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High-efficiency flotation of quartz under alkalescent conditions remains challenging owing to the leak of an effective activator. In this research, high quartz …
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The flotation behaviour of quartz using DDA–HCl and DDA microemulsion C (W DDA = 50%) as the collector with a DDA dosage of 100 g/t at pH of 3.0–11.0 is shown in Fig. 7. It can be found that a strong acid or alkali environment is not conducive for quartz flotation with DDA microemulsion and DDA–HCl.
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The maximum recovery rate of azurite with PEBH was found to be 95 %, while that of quartz and calcite was only 6 % and 18.5 %, respectively. Therefore, the optimal pH for azurite flotation using amidoxime surfactant PEBH is 11, while the optimal pH for quartz and calcite flotation is 6.5 and 8. Download: Download high-res image …
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An improved method for producing high-purity quartz (Qtz) and potassium feldspar (Kfs) concentrates was developed using various chemical reagents. Froth …
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Experimental studies of flotation of quartz particles, under various conditions and cells (setups), are presented. Pure and well-characterized quartz samples were treated with a commercial alkyl ether monoamine as flotation collector with bubbles in various sizes: coarse bubbles (400–800 μm); nanobubbles (200–720 nm); and their …
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A method for direct float quartz from the feldspar under alkaline pH was proposed.. Effect of depressant HPS on flotation separation of quartz from feldspar was firstly studied.. When NaOL was the collector and MgCl 2 was activator, HPS was an effective feldspar depressant.. HPS was selectively adsorbed on feldspar through Al …
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The above results shown that it is more conducive to the flotation separation of quartz and magnesite under alkaline conditions. Download: Download high-res image (187KB) Download: Download full-size image; Fig. 6. The flotation recovery of magnesite and quartz as a function of slurry pH (a) and P507-N12111 dosage (b).
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The physical and chemical properties of feldspar and quartz are highly similar, thus they cannot be easily separated effectively. In this work, the flotation …
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The flow chart of quartz flotation is shown in Fig. 1.A 40 mL XFG tank flotation machine was used to conduct the flotation experiments [19]. 2.00 g of quartz particles and 30 mL of DI water were poured into the flotation tank and stirred to adjust the pulp for 2 min, after which pH regulator, activator (only present in anionic flotation), and …
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It also shows that an increase in the amount of Brij 58 has a strong positive effect on the flotation of quartz. At 100 g/t Brij 58 an increase from 67.8 to 108.5 kg/t …
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Section snippets Materials and reagents. High-purity magnesite and quartz samples were obtained from Yunnan Province, China. The lump pure minerals were pulverized and ground by a hammer and a ceramic grinder, respectively, and then sieved to collect the –74 + 37 µm particle size for micro-flotation tests.
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The flotation recovery of quartz increases with surfactant concentration. The DDA alone possesses better collection abilities than mixed DDA/NaOL surfactants, e.g., at 3 × 10 − 4 mol/L. The flotation recovery of quartz is approximately 98.35% for DDA alone, whereas it is only approximately 10.02% for mixed surfactants. 3.2.
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Flotation experiments were investigated the flotation performance and verified the adsorption behavior of NHPA on quartz surface. The results of FT-IR spectra and zeta potential measurements demonstrated that the adsorption between NHPA and quartz surface was mainly through electrostatic force and hydrogen bond force, which …
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2.2. Micro-flotation test. An advanced Hallimond tube was chosen in the micro-flotation experiments, and 2 g minerals (bastnaesite, calcite, quartz, bastnaesite-calcite or bastnaesite-quartz mixture with a mass ratio of 1:1) with the particle size distribution from 38 to 74 μm were used in each test following the reported procedure …
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