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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In this work the reverse flotation as beneficiation process for high-purity silica valorization from Draissa quartz deposits (Algeria) is studied as a potential raw material for photovoltaic silicon production and starting charge for crystal growth material for a large wide of applications such laser and scintillation. The samples are investigated by optical …
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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-flotation results …
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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-flotation results …
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The flotation experiments were conducted on high-purity quartz samples taken from Jiangsu province, China. A laser particle size analyzer (GSL-1000, Liaoning instrument research institute Co., Ltd., Dandong City, China) was employed to measure the particle size distribution (Figure 1). According to Figure 1, the quartz sample had a d 50 …
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The relationship between collector concentration and the solution pH at which flotation occurs is discussed for different minerals. When flotation results are plotted as log of the concentration against pH, the values define areas of total, partial or no flotation.The experiments were performed in three different conditions: a) floating with the same …
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Carbonate flotation followed by quartz flotation is an effective way to separate carbonate and quartz minerals from phosphate ores (Amirech et al. 2018); however, the calcination of phosphate ores followed by quartz flotation is an important process for producing high-quality phosphate products. By removing carbonates and …
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The flotation studies of hematite and quartz as a function of collector dosages, pH and depressant were investigated and the recoveries to the froth phase are shown in Fig. 3.It can be seen that at natural pH, (∼pH-7.5) the flotation recoveries of both hematite and quartz increase with an increase in collector concentration (Fig. 3 a).The …
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Abstract and Figures. Taking quartz as the research object, the effect of silicate bacteria pretreatment on quartz flotation was investigated. After pretreating quartz for 3 days by using silicate ...
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Reverse flotation separation of hematite from quartz assisted with magnetic seeding aggregation. Magnetic seeding aggregation was applied to the reverse flotation …
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The flotation separation of magnetite and quartz is a long-term challenge for the beneficiation industry. For high-quartz magnetite, conventional flotation shows poor separation effect, resulting in the waste of resources and low flotation efficiency. In this paper, dodecylamine acts as a collector and Al(III) ions in water act as a depressant to …
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The flotation tests found that the flotation recovery of fine hematite increased observably to 94.51% from 68.69% by adding 4 mg/L PAAS before NaOL at pulp pH 7.3; in the separation of mixed hematite and quartz, the separation efficiencies of fine hematite with and without the addition of the PAAS are 85.71% and 68.84%, respectively.
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1. Introduction. Iron is the most widely used metal in the world and plays a vital role in industry. In recent years, with the rapid depletion of high-grade iron ore, the development and use of low-grade iron ore have received more attention [1], [2], [3].Flotation is one of the most common methods used to recover iron ore, which …
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Pure mineral flotation experiments have demonstrated that quartz can be floated without a collector, in solutions containing an inorganic acid (e.g. H 2 SO 4) and …
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The effects of Ca2+, Mg2+, Al3+, and Fe3+ on the flotation behaviors of apatite, dolomite and quartz were investigated through a micro-flotation test, and the influence of calcium ions on the flotation of these minerals was further elucidated by solution chemistry study, zeta potential measurement, and X-ray photoelectron …
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Quartz, a common inorganic nonmetallic mineral, is usually removed or purified by beneficiation, normally flotation. Given the strong polarity of the quartz surface, it is easy to hydrate to form a …
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QUARTZ FLOTATION WITH CATIONIC COLLECTORS. STREAMING POTENTIAL STUDIES. QUARTZ FLOTATION WITH CATIONIC COLLECTORS. Full Record; Other …
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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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sulphate. The maximum flotation recovery of 90% is attained at 5 × 10-4. M sodium oleate concentration. The flotation response of quartz and hematite as a function of pH with cationic C. 12 . amine, anionic oleate and Sodium dodecyl sulphate collectors, is shown in Figure 3. The quartz flotation recoveries are presented at 5 10-5, 1 10-4
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The Effect of Micro Turbulence on Quartz Flotation Rate. In this research, the effect of micro turbulence on the flotation rate of quartz particles was investigated. The maximum particle Reynolds number (Rep) was obtained at 60.25 with a particle size of -500+420 µm, impeller speed of 900 rpm, bubble surface area flux of 10.21 1/s and micro ...
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The selectivity window between quartz and hematite flotation using amide-amine was higher at pH 10.5 (approximately 80% for 5 mg/L). Therefore, the use of starch is not necessary in siliceous itabirite flotation by amide–amine collector. Zeta potential measurements and infrared spectra reveal that the adsorption of amide-amine collector …
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The quartz recovery was improved from 75.45% to 91.71% with the increase of NaOl concentration from 25 to. Conclusions. 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 …
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Influence of magnetite on the flotation separation of hematite from quartz. During the reverse anionic flotation of iron ores, quartz is activated by the calcium chloride under strong alkaline condition, and iron ores are generally depressed with starch due to the selective adsorption of starch on the surface of iron ores as reported earlier ...
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The flotation recovery of quartz increased with the increase in preparation time of BMNBs water. Without BMNBs (i.e., preparation time is 0 min), the flotation recovery of quartz was about 72%. When BMNBs water with a preparation time of 1 min was used for flotation, the quartz recovery was about 77%, increasing by nearly 5%.
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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. Flotation …
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The silicate species adsorbed on quartz stably by forming the trigonal pyramidal adsorption configuration, which prevented the adsorption of Ca 2+ and Mg 2+ ions, as well as collector. And the stable adsorption of the sodium silicate could be hardly influenced by the number of the Ca 2+ and Mg 2+ ions. The flotation of quartz was …
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The flotation performances and adsorption mechanisms of NDIA on quartz are investigated by flotation tests, FT-IR spectra studies, zeta potential measurements, and XPS analysis. Flotation results demonstrate that NDIA has excellent floatability and selectivity on quartz at a wide range of pulp pH (about 4.5–8.0).
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This study demonstrates a high flotation separation selectivity between quartz and different types of feldspar, and that quartz can be readily floated from …
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In general, the flotation of quartz has two common methods: cationic flotation using fatty amines, quaternary ammonium salts, ether amines, etc., and …
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Cerussite is an important lead oxide mineral, and quartz is the main gangue mineral. To investigate the effects of dissolved cerussite species on quartz surface properties and floatability in the sulfidization xanthate system, inductively coupled plasma mass spectrometry (ICP-MS), X-ray photoelectron spectroscopy (XPS), time-of-flight …
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In reverse flotation, quartz, the major impurity in the iron ore, is floated using ether amines, and iron oxide minerals are depressed using depressants such as starch. It is expected that improvement in grade and/or recovery may be possible from fundamental surface chemistry study of reverse flotation system for the processing of iron ore.
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The flotation performances of muscovite and quartz had been studied using DDA, NaOL and mixed NaOL/DDA with various molar ratios. Fig. 1 shows flotation recoveries of muscovite and quartz as a function of pH in the presence of different collectors. It can be seen that with an increase of pH from 2 to 11, the recovery of …
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Due to strong hydrophilicity of quartz surface, the adsorption of organic collectors with hydroxyl group is the key to quartz flotation. Previous research showed that anionic collectors of fatty acids could not adsorb on the quartz surface without activation via metal ions [11], [12]. Therefore, it is of practical significance to investigate ...
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To study the sodium oleate (NaOL) adsorption on quartz and its effect on flotation under weak-acidic conditions, the adsorption characteristics of NaOL on the surface of quartz were determined at ...
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The results showed that the optimum flotation pH was 11.5 for quartz, 6.45 for hematite and 6.97 for magnetite. The best α-BLA concentrations was 75 mg/dm 3 for quartz flotation, 125 mg/dm 3 for hematite and magnetite flotation. The activator CaCl 2 had little effect on the flotation of hematite and magnetite, but the minimum dosage 50 mg/dm 3 ...
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