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performance of wolframite in the presence of octyl hydroxamic acid and investigated the interaction of octyl hydroxamic acid (OHA) with wolframite by solution component measurements and surface chem-istry analysis, indicating that OHA replaced WO 2 2− ions and interacted with Mn/Fe sites at wolframite surface. Deng et al. (2015) found that N-
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Micro-flotation tests were conducted on the pure mineral to investigate the effects of Pb(II) on wolframite floatability. As shown in Fig. 2, the wolframite floatability with solely BHA collector was low.A maximum recovery of approximately 26% was obtained at pH around 8.5 when adding 5.8 × 10 −4 mol/L (corresponding to 1.6 kg/ton) BHA, …
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The activation mechanism of Pb(II) on the flotation of wolframite was systematically investigated. Micro-flotation test results showed that Pb(II) effectively improved the flotation of wolframite in the presence of benzyl hydroxamic acid (BHA). Maximum floatability of wolframite was achieved at approximately pH 8.5.
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Bench-scale flotation tests indicated that SHA can effectively recover wolframite concentrate with 55.64% WO 3 grade and 75.28% WO 3 recovery from wolframite tailings by the combined shaking table-flotation process. Polarized light microscope observations showed that SHA could promote the formation of hydrophobic …
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tion instead of traditional flotation to improve the flotation recovery rate of fine wolfram-ite. 2. Materials and Methods 2.1. Materials The wolframite sample was from the Mahuaping Tungsten Mine in Hutiaoxia, Shan-gri-La, Yunnan. The purity WO 3 was 97%. The X-ray diffraction analysis of the obtained wolframite is shown in Figure 1. 10 20 30 ...
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Electron donating ability and hydrophobicity are of the two aspects related to flotation performance of a collector. To solve the insufficient collecting power of benzohydroxamic acid (BHA) in tungsten ores flotation, its derivatives p-alkoxyl benzohydroxamic acids (AOBHAs) were designed as the advanced wolframite …
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Scheelite (CaWO 4) and wolframite ((Fe, Mn)WO 4) are the only tungsten minerals mined commercially and are mainly found in five types of deposits: skarn, vein/stockwork, porphyry, disseminated and stratabound.Gravity concentration and flotation are the beneficiation techniques most commonly applied to scheelite ore, and …
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The jig is used for roughing and recovering coarse particle wolframite, while the shaking table is for selecting fine-grained concentrate. Step #4 Flotation separation: Use a flotation machine to remove sulfides in order to liberate the tungsten. The process flow is mixed flotation of sulfide ore - separation of wolframite by strong magnetic ...
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The optimum flotation kinetics of fine wolframite in the laboratory is expressed as follows: (9) ε = 87.26 − 31.74 e − 3.446 t − 55.51 e − 0.879 t. 3.3. Flotation …
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The recovery of fine wolframite is low when using traditional flotation that does not use a microbubble. In this study, a microbubble was introduced into the fine …
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HU Y., WANG D., XU Z., 1997, A study of interactions and flotation of wolframite with octyl hydro-xamate, Minerals Engineering, 10, 623-633. HU Y.H., WANG D.Z., 1987, Mechanism of adsoprtion and activation flotation of metallic ion on oxide mineral-water interface, Journal of central south institute of mining and metallurgy, 5, 003.
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Vietnam has a tremendous rare earth potential, distributed mainly in the Northwest, including Nam Xe, Dong Pao, Muong Hum, and Yen Bai. There are many research projects on rare earth ores of ...
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The flotation enrichment of fine-particle wolframite played a crucial role in production of strategic key metal tungsten. In this paper, N-[(3-hydroxyamino)-propoxy]-N-hexyl dithiocarbamate (HAHD ...
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Request PDF | Modification mechanism of lead ions and its response to wolframite flotation using salicylhydroxamic acid | The surface modification of wolframite by Pb²⁺ ions and its influence ...
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Vietnam was the second-largest producer of tungsten concentrate, with a share of about 5% (4300 t), while Russia ranked third, with about 3% ... Ai, G.; Liu, Y. A study on recycling fine wolframite slime by "flotation desulfurization-centrifugal preconcentration-flotation wolframite" process. IJSSST. 2016, 17. [Google Scholar]
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Apatite ore plays a critical and irreplaceable role in fertilizer production and is being upgraded in quality in northern Vietnam. The old tailing of the Bac Nhac Son beneficiation plant (Vietnam) has a significant apatite amount in the form of coarse unliberated particles. These millions of tons of tailing ore have 6–8% of P2O5 content, which can be retreated …
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The purity of wolframite and quartz is 95% and 98%, respectively. The wolframite ore from wolframite-quartz vein deposit for bench-scale flotation experiments was purchased from Tungsten Industry Co. LTD, Jiangxi Province (China). Wolframite is the main useful mineral, and quartz is the main gangue mineral.
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ABSTARCT. Wolframite is a series of minerals belonging to the isomorphic (Fe, Mn)WO 4 with varied Fe/Mn ratios, for which the floatability changes with its …
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The influence of quartz on the flotation of fine wolframite using octyl hydroxamic acid (OHA) as the collector was investigated by micro-flotation tests, inductively coupled plasma (ICP ...
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The flotation mechanism in the HAHD-NaClO-wolframite system was explored by in situ AFM, FTIR, UV and XPS. Based on the investigations and discussion, we could draw the following conclusions. (1) In situ AFM exhibited that NaClO pretreatment increased the adsorption affinity of wolframite towards HAHD, and the multilayer …
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@article{Zhang2021SeparationOW, title={Separation of wolframite ore by froth flotation using a novel "crab" structure sebacoyl hydroxamic acid collector without Pb(NO3)2 activation}, author={Shiyong Zhang and Zhiqiang Huang and Hongling Wang and Rukuan Liu and Chen Cheng and Zhiqun Guo and Xinyang Yu and Gui-chun He and Weng Fu}, …
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Considering the long term exploitation of wolframite and the fact that most of the wolframite ores contain less than 1% WO 3 (Luo et al., 2003), the wolframite flotation becomes crucially ...
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The results indicate that the mechanism of Pb(II) activation in BHA flotation of wolframite in a neutral solution environment was probably due to the traction from …
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PDF | The flotation enrichment of fine-particle wolframite played a crucial role in production of strategic key metal tungsten. In this paper,... | Find, read and cite all the research you need on ...
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Vietnam has a tremendous rare earth potential, distributed mainly in the Northwest, including Nam Xe, Dong Pao, Muong Hum, and Yen Bai. There are many …
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The flotation results showed that NHOO was a stronger collector than the conventional hydroxamic acid collectors such as BHA and OHA. At pH 6.0 and 15 mg/L collector dosage, NHOO floated out 90.7% wolframite, while for BHA and OHA at their preferable flotation pH 9, wolframite was only floated out 13.5% and 15.2%, …
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The samples of wolframite and quartz were collected from Xihuashan Mine, Jiangxi province and Ningxiang, Hunan province. X-ray diffraction (XRD) analysis and particle size distribution of wolframite and quartz designated for the flotation test were given in Fig. 1.And their X-ray fluorescence spectrometer (XRF) results were shown in …
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The surface modification of wolframite by Pb²⁺ ions and its influence on the flotation of wolframite using a salicylhydroxamic acid (SHA) collector were investigated through microflotation ...
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The purified wolframite sample was obtained from Yaogangxian mine, Hunan province, China. The X-ray fluorescence analysis indicated that the tungsten content (WO 3) of wolframite sample was as high as 74.18% and its purity was more than 97% based on the comparison between experimental and theoretical values.The X-ray …
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Effectively separating wolframite, a significant metal resource, from gangue minerals containing calcium and silicon is an urgent and essential research subject in mineral processing. In our study, we prepared the surfactant NPOHA and report its first application to the selective flotation separation of wolframite from quartz and fluorite.
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