— Developed effective and green flotation separation for fine-grained fluorite. Ensured initial dispersion and in-situ surface modification during ball-milling. Achieved …
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— Barite, fluorite: Pavez et al. [25] Hydroxamate: 9: 37: Silicate, oxides: ... The mechanism of the intergrowth minerals depression by water–glass can be explained as: at pH value 8.5–9.5, H 2 SiO 3, HSiO 3 and gummy SiO 2 ... Rare earth mineral separation by flotation is a complex procedure. The objective of this review was to present and ...
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separation of Rare Earth minerals from intergrowth minerals. The infrared spectra for H205 and RE cations by theorical analysis shows that H205 formed chelate complex with RE …
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the surface of fluorite particles, which helps to arrest this mineral [7–10]. The presence of quartz in the concentrate could be explained by three reasons [11–14]: —intergrowth of fluorite particles and other floatable minerals; —presence of slimes and fine particles that are adsorbed on the cationic surfaces of other minerals
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— The inclusion (∼5 cm in diameter) comprises a narrow rim containing chevkinite-(Ce) and zircon in a fluorite matrix, a core of fluorbritholite-(Ce) and bastnäsite-(Ce) and a transition zone between the rim and the core consisting of a fine-grained intergrowth of bastnäsite-(Ce), gagarinite-(Y) and fluorite.We propose that the inclusion …
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— The pure minerals of fluorite and calcite used in the experiment were obtained from Chongqing City and Hunan Province, China. Fluorite and calcite were processed through a series of material separation methods such as hand selection, crushing, grinding and sieving to obtain two powder samples.
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— 1. Introduction. Tungsten ore, as an important strategic resource, has been widely used in modern science and technology [1].Wolframite is an important tungstate mineral of Fe or Mn and often associated with calcium-bearing minerals [2].Froth flotation is usually used to treat fine wolframite [3].Hydroxamic acid is a commonly used collector …
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The most significant tantalum-niobium mineral in the ore is columbite-tantalite, which is also the most valuable metallic mineral. The separation of columbite-tantalite directly affects the recovery index of tantalum and niobium elements. Therefore, the dissemination characteristic of columbite-tantalite was investigated.
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— Bastnaesite is an important strategic resource. Since the calcium-bearing gangue minerals in the pulp can dissolve and release Ca 2+ ions, Ca 2+ ions and sodium silicate have a co-depression effect on bastnaesite flotation, which will affect the separation and purification of bastnaesite. In this study, the mechanism of eliminating the co …
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— In these cases, textural characterisation, and especially the characterisation of the intergrowth pattern, is essential to determine the response of mineral particles to separation processes and the possibility of increasing liberation by a regrinding stage. As an example, Fig. 1 shows the significance of the intergrowth type on mineral ...
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The study, description and interpretation of these intergrowths is the objective of textural analysis and is very important for mineralogy, both from a scientific point of view (e.g. …
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— The main mineral of fluorite ore is fluorite with chemical formula CaF 2 in yellow, green, blue, violet, colorless and sometimes purple, it is crystallized in cubic system. This ore density is 3.18 gr/cm 3 and its hardness is 4 in the Mohs scale. Fluorite usually fills the gaps between other minerals and found in nature as veins.
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— The article presents the case-study of flotation of fluorite ore from Kamarposht mine, Iran. The flotation tests allowed optimization of consumption of chemical reagents. …
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— The Singhbhum Shear Zone, eastern India is known for its large uranium and copper resources. Uraninite, the most abundant U-ore mineral, occurs as inclusions in magnetite, ilmenite, apatite, tourmaline, biotite, chlorite and allanite. Shared grain boundaries of uraninite with magnetite and ilmenite are common. Uraninite also shows …
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— Fluorite and calcite were separated with nitrilotriacetic acid (NTA) as a depressant. The single mineral flotation experiment confirmed that with 40 mg/L NaOL …
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— The separation of cassiterite from fluorite was successfully achieved using a novel collector and depressant combination. • Cu 2+ was proved to be an effective and selective depressant for fluorite.. CEPPA had stronger affinity for Cu 2+ than for fluorite surface in solution.. Cu 2+ could be anchored on cassiterite surface by substitution or …
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If the twin law can be defined by a simple planar composition surface, the twin plane is always parallel to a possible crystal face and never parallel to an existing plane of symmetry (remember that twinning adds symmetry).. If the twin law is a rotation axis, the composition surface will be irregular, the twin axis will be perpendicular to a lattice plane, but will …
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— Fig. 2 shows the recoveries of bastnäsite and fluorite as a function of OHA dosage at pH 9.0 in single mineral flotation. Both bastnäsite and fluorite recoveries increased with the increase of OHA dosage and stabled when OHA dosage was over 796 g/t. However, the differences between bastnäsite and fluorite recoveries were always …
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— In this review, analyses of the fundamental reasons for the difficulties of flotation separation of fluorite from calcite are performed, from the similar surface …
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Evaluation of a novel depressant PMAA for the separation of fluorite from calcite using NaOl as a collector Xiaofeng Zhang 1, Qi Li 2, ... is relatively easy to separate sulphide minerals from fluorite when using xanthate collectors due to the difference of natural hydrophobicity (Ai et al., 2021; Tang and Chen, 2022). However, when the gangue
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— However, selective separation of fluorite and calcite minerals with an anionic collector could be realized by adopting different depressant systems. Tannic acid (TA) is a well-known organic depressant that has received considerable attention in many fields. TA is a type of high-molecular-weight polyphenol that can be found in different parts of ...
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of intergrowth patterns that this mineral presents in this sample, especially when it is associated with secondary copper sulphides, makes this sample particularly interesting to test the method, even
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Minerals. 2021, 11, 1203 2 of 13 . on the mineral surface. In industrial production, the amount of water glass used is very high, which will strongly inhibit fluorite and gangue minerals, making the flotation of fluorite difficult [14]. To avoid this situation, water glass can be modified to improve its selectivity. The
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— The results showed that the metal content of the four minerals was mainly distributed in the fine fraction and micro-fine particles, and presented as the inclusions or the intergrowth form with ...
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A mineral dressing method for recovering low-grade fluorite from tin-copper intergrowth tailings comprises the steps of preparing tailings into ore pulp, removing sulfides in the tailings through floatation, removing residual agents and easily-slimed calcium carbonate gangue in the tailings through a cyclone, precipitating and pulping through the cyclone, …
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— In these cases, textural characterisation, and especially the characterisation of the intergrowth pattern, is essential to determine the response of mineral particles to separation processes and the possibility of increasing liberation by a regrinding stage. As an example, Fig. 1 shows the significance of the intergrowth type on mineral processing.
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— The ore of the Vergenoeg fluorite mine, South Africa, contains rare earth elements in concentrations that may be of commercial interest. To assess the distribution of the rare earth minerals in ...
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— In the flotation separation of bastnaesite and its accompanying gangue mineral fluorite, this newly developed hydroxamic acid collector outperforms oleic acid in terms of selectivity [36]. The ...
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Twinning in Minerals and crystals. Twinning in minerals is a phenomenon in which two or more crystals of the same mineral grow together in a symmetrical fashion. This can happen during the initial growth of the crystal, or it can occur after the crystal has formed as a result of stress or temperature changes.
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— 1. Introduction. Fluorite (CaF 2) is an important nonrenewable mineral that is primarily used for the production of hydrofluoric acid and as a flux agent in steel making.As current fluorite resources exhibit increasingly complex mineralogical compositions, separation of fluorite is difficult.
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— 1. Introduction. Fluorite is one of the most important fluorine-containing minerals in Earth's crust, and it is composed of calcium and fluorine [1], [2].As an important non-metallic strategic mineral resource, fluorite plays an irreplaceable role in traditional industries such as metallurgy, chemical engineering, and building materials, and in …
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— 1. Introduction. Fluorite (CaF 2) is a nonrenewable and critical non-metallic mineral resource.In addition to metallurgy and building materials industries, almost 50 % fluorite is used to produce hydrofluoric acid (HF) and other downstream products, such as refrigerant, fluorine rubber, fluorine resin, fluorine polymer, aluminum fluoride, fluorine …
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— The alteration of the zircon is similar to that within the rim and transition zones, i.e., relicts of unaltered zircon are surrounded by zones of a fine-grained …
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— Chlorinity and Cl/Br molar ratios (212–521) indicate the involvement of a brine, whose origin likely corresponds to Triassic evaporated seawater compatible with …
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