Developing Effective Separation of Feldspar and Quartz While Recycling Tailwater by HF Pretreatment

Wang, Weiqing; Cong, Jinyao; Deng, Jie; Weng, Xiaoqing; Lin, Yiming; Huang, Yang; Peng, Tiefeng

doi:10.3390/min8040149

Cited by 37 publications

(16 citation statements)

References 32 publications

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“…Consequently, quasi no quartz till to 0.01wt% is detected in the feldspar concentrate. This is mainly due to.the pretreated feldspar by HF in increasing its floatability compared to quartz, which is in agreement with the literature [37][38][39]. The final quartz concentration after flotation process characterized by XRF reaches 99.65 wt%, which is available to be used as raw material for silicon production and also for some optical applications (Table 2).…”

Section: Feldspar Removalsupporting

confidence: 88%

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Quartz Ore Beneficiation by Reverse Flotation for Silicon Production

Medjahed

Kheloufi

Bobocioiu

et al. 2020

Silicon

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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 also for starting charge for crystal growth material for a large wide of application such laser and scintillation. The samples are examined investigated by optical microscopy, secondary ion mass spectroscopy, X-ray fluorescence and Raman spectroscopy. The microscopic investigations detect solid impurities such as alkaline and plagioclase feldspars, micas and iron oxides. The analyzed silica shows well-developed crystals areas, delimited by microcrystalline regions. Impurities are predominantly located in low quartz granulometry (50-100μm). The XRF results highlight 93.63wt.% SiO 2 , 0.16wt.%, Fe 2 O 3 , 0.171wt.% Cl, 0.15wt.% CaO, 5.74wt.% Al 2 O 3 , 0.074 wt.% K 2 O, 0.001%wt CdO, 0.006%wt. SnO 2. However, these results remain insufficient for predestined use of this material raw quartz directly. A preliminary enrichment using reverse flotation process improves the silica purity up to 99.6% and removes the major impurities, which is suitable intermediate technological product able for silicon production and optical application domain.

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Section: Feldspar Removalsupporting

confidence: 88%

“…Thus, effectively increased its hydrophobicity and makes the feldspars easily floatable. This conclusion is also confirmed by [37,38]. After, the quartz particles are moved towards of the bottom of the flotation cell.…”

Section: Feldspar Removalsupporting

confidence: 61%

Quartz Ore Beneficiation by Reverse Flotation for Silicon Production

Medjahed

Kheloufi

Bobocioiu

et al. 2020

Silicon

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“…The weak FTIR bands suggest low amounts of kaolinite present in the samples. The presence of feldspar (identified by XRD in sample 1b) is suggested by the bands appearing at 1,150, 989 (overlapping with the muscovite band) and 642 cm −1 (Wang et al, 2018). The appearance of a band around 3,620 cm −1 can be assigned to the O-H str.…”

Section: Characterization Of Lba Ceramicsmentioning

confidence: 89%

Archaeometrical Characterization of Romanian Late Bronze Age Ceramic Fragments

et al. 2021

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Knowledge of the past can provide information to protect the future and the potential of the technological development in the analytical sciences can be successfully applied for the study and conservation of cultural objects. In this context, in the present paper we propose an analytical methodology to characterize seven samples of ancient ceramic objects (dating to the Late Bronze Age). The samples were analyzed using optical microscopy, and all the samples presented a strong inhomogeneity on the surface, as suggested by the different colors of the ceramics. X-ray fluorescence (XRF) results reveal a relatively heterogenous composition of the samples, as well as strong differences between the different surfaces of each sample. By comparative analysis of the diffractograms recorded for both sides of the same samples were observed some differences, especially in terms of relative concentration of the component minerals, and, in lesser content, in terms of new phases present in the samples. Corroborated results obtained by XRF and X-ray diffraction (XRD) offered information regarding mineralogical composition of the samples: for some of them illite/muscovite and plagioclase phases are present in higher quantities or a lower quartz content. The presence of these components was confirmed by Fourier-transform infrared spectroscopy (FTIR) analysis. The thermal analysis completes the analytical investigation of the ceramic samples. The thermal behavior of the sample conducted to some explanation regarding the observed differences, due to the raw materials (that the major clay mineral in the samples is represented by illite) or to environmental factors during their burial in the soil.

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“…The results of the investigation of the phase composition of specimens by the XRD method show (Fig. 5) that quartz and feldspars are the main crystalline phases [41][42][43]. With increase in the contents of sand glass in the initial compositions, the contribution of the amorphous phase to the ceramics, which is recorded as a diffuse halo in XRD patterns, increases.…”

Section: X-ray Datamentioning

confidence: 99%

“…IR spectra of ceramic specimens are a superposition (Fig. 7) of the spectra of quartz, feldspars, and glass [41,42,[44][45][46]. Depending on the individual contribution of one or another phase, the observed shift of the intensive absorption band ranges from  ~ 1090 cm -1 to  ~ 850 cm -1 , which indicates that the content of the glass phase in specimens rises with increase in the contents of sand и glass in the initial mixtures.…”

Section: Ir Datamentioning

confidence: 99%

Low-temperature sintering of high-siliceous clay under conditions of oxygen deficiency

et al. 2021

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In the work, the processes of phase reconstruction and properties of ceramics obtained from high-siliceous clay-sand, clay-cullet, and clay-sand-cullet mixtures are considered. It is possible to perform plastic molding of blanks from the given mixtures due to the presence of montmorillonite in clay and sand and sintering at 800 oC for 8 h under conditions of oxygen deficiency. Depending on the composition of the initial mixtures, specimens ranging in color from gray to black can be obtained. It has been established by the XRD, IR spectroscopy, and electron microscopy methods that the synthesized material is glass ceramics consisting of quartz, feldspars, and a glass phase. Depending on the content of the initial components in the mixtures, it is possible to obtain glass ceramics with high strength properties or coarse-pored glass ceramics whose properties are similar to those of foamed ceramics.

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Developing Effective Separation of Feldspar and Quartz While Recycling Tailwater by HF Pretreatment

Cited by 37 publications

References 32 publications

Quartz Ore Beneficiation by Reverse Flotation for Silicon Production

Quartz Ore Beneficiation by Reverse Flotation for Silicon Production

Archaeometrical Characterization of Romanian Late Bronze Age Ceramic Fragments

Low-temperature sintering of high-siliceous clay under conditions of oxygen deficiency

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