Surface Review and Letters
The experimental results showed that YF collector has high selectivity in the flotation of fluoride for low-grade fluorite ores. The use of the YF collector also made it unnecessary to heat the pulp to a high temperature and achieved an acceptable reduction in the flotation temperature to 1 3 ∘ C. The YF collector should be used in neutral pH ...
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A review of flotation reagents for bastnäsite-(Ce) rare earth …
The global demand for high-quality ore has increased significantly in recent years, leading to a surge in demand for highly efficient hydroxamic acid chelating collectors in terms of type and quantity. ... (Ce), enabling the reverse flotation of fluorite from bastnäsite-(Ce) and achieving good separation effects. This study offers a new idea ...
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The Challenge of Tungsten Skarn Processing by …
Various reagents suitable for scheelite flotation (collectors and depressants, mostly) are reviewed in the present work, with a strong focus on the separation of …
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Geoeconomics of fluorspar as strategic and critical mineral …
Fluorite (CaF2) 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 coating, and lithium …
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The utilization of citric acid as a depressant for the flotation
Microflotation showed that CA exhibited selective depression for fluorite, which allowed the preferential flotation separation of barite from fluorite at pH ~ 8.5. Real ore flotation confirmed that the separation of barite from fluorite could be achieved using CA as the depressant. A barite concentrate with 92.03% grade and 84.58% recovery …
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Froth flotation of fluorite: A review
4-2021. Department of Chemical Engineering. Abstract. Fluorite, as a scarce nonrenewable strategic non-metallic mineral resource, is the primary raw material for fluorine products …
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IMPROVING FLUORITE FLOTATION UNDER LOW …
The authors provide insight into the problem of selective flotation of fluorite from quartz–fluorite ores. The flotation of fluorite mineral from ores by using acidized water glass as depressant has been studied for substitution of the commonly used depressant. It was found that the acidized water glass could achieve higher selectivity of …
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Fluorite flotation separation from bastnaesite via an eco …
This study provides an idea for separating fluorite and rare earth by preferential flotation of fluorite and selective inhibition of bastnaesite. Introduction. ... extracting high-quality rare earth resources from nature has become a global priority. Bastnäsite-(Ce) is one of the known rare earth minerals with high rare earth content and …
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Synergistic effects between fatty acids and non-ionic
The optimal pH for scheelite flotation was found to be 9–10, although it also corresponded to the optimal floatability of fluorite. Then, four different fatty acids were tested in micro-flotation on scheelite and fluorite. The short-length chain fatty acids such as myristate do not afford a good floatability of scheelite, probably
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Surface chemistry considerations in the flotation of …
The micro-flotation results showed that the XG was an efficient selective depressant for the fluorite but had minimal impact on the bastnaesite. The results of the adsorption density and zeta potential analyses indicated that the adsorption of the XG occurred on both the bastnaesite and fluorite surfaces.
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Zhao WEI | Doctor of Engineering | China University of …
Scheelite has emerged as the primary source of global tungsten resources. The flotation separation of scheelite, which is hindered by its interface similarity with calcium-containing minerals ...
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Flotation separation of bastnaesite from fluorite with an …
In addition, the utilization of PESA for clean flotation of phosphate ores was reported by Dong et al. [30]. Therefore, PESA could be a promising eco-friendly depressant for the calcium-bearing minerals in the froth flotation. Fluorite is a kind of calcium-containing mineral that is regarded as a commonly associated gangue in bastnaesite …
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Intensifying fine-grained fluorite flotation process …
Volume 257, 15 February 2021, 117982. Intensifying fine-grained fluorite flotation process with a combination of in-situ modification and liquid-gas microdispersion. …
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Comparison Between Performance of Fluorite Flotation …
Fluorite is an important industrial mineral composed of calcium and fluorine (CaF2). This mineral is widely distributed through different deposits. However, in most cases, fluorite is tightly associated with gangue, such as calcite and quartz. In this paper, different depressants are tested in the flotation of fluorite in two different laboratory …
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Selective flotation of scheelite from calcite and fluorite …
In this study, a collector mixture of 733 and MES (sodium fatty acid methyl ester sulfonate) demonstrated a high selectivity for the flotation of scheelite from calcite and fluorite. An optimal mass ratio 4:1 of 733:MES was found, producing a 65.76% WO3 concentrate grade with a recovery of 66.04% from a feed material containing only 0.57% …
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Overview of Fluorite Resources and Processing Technology …
The key technical problems of fluorite separation, such as flotation separation of fluorite and calcite, low temperature flotation reagents, and the influence of ions in pulp, were discussed. Finally, some suggestions and solutions have been proposed with a view to providing new ideas and strategies for efficient development and utilization …
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On the impact of grinding conditions in the flotation of …
1. Introduction. Grinding and flotation operations are typically studied separately in the literature, although it is well-established that the grinding environment is a determining factor on flotation performance [1], [2].Through grinding, the physical state of the solid is changed as to particle size, particle shape/morphology, grain …
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Flotation separation depressants for scheelite and calcium …
Owing to the depletion of wolframite, the focus of tungsten extraction has gradually shifted to scheelite. However, separating the associated minerals (e.g., apatite, fluorite, and calcite) and scheelite is challenging because their surface physicochemical properties are similar to those of scheelite. Fortunately, researchers have made …
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Minerals | Free Full-Text | Selective Adsorption of Sodium
During the flotation separation process of bastnaesite, it is difficult to separate bastnaesite from fluorite effectively. In this present study, sodium silicate (SS) can effectively improve the flotation separation effect of bastnaesite and fluorite in salicylhydroxamic acid (SHA) systemasa. Through relevant analyses, such as Zeta …
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1,2,3, Qiwu Zhang 1,*, Hongchao Li 2,3 and Chao Wang
Figure 1. Unit cell structure of (a) fluorite [21] and (b) calcite (Ca = light green, O = red, C = grey) [22]. 2.1. Solubility The solubility of the mineral surface has an important effect on its surface charge and flotation behavior, especially for semi-soluble minerals such as fluorite and calcite [23 27]. The pK
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Froth flotation of fluorite: A review
The present review sheds new light on the deep understanding of fluorite flotation, the future synthesis of reagents, as well as their schemes in practical use. Meanwhile, such a novel rain of thought provided in this work has the potential to guide …
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Investigation of two-stage depressing by using
The industrial tests were performed at Hunan Xinyuan Corporation's Fluorite Flotation Plant. In these tests, mud was removed early in the process by fluorite desliming rougher flotation. The old system used sodium silicate as a depressant during flotation. The flotation flowsheet of the industrial tests is described in Fig. 7. The new system ...
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Innovative application of sodium tripolyphosphate for the flotation …
Flotation results indicated that ATMP exhibited strong inhibition on the fluorite flotation but did not affect that of scheelite, and a satisfactory separation of scheelite from fluorite was achieved at the reagent regime of 60 mg/L ATMP, 40 mg/L sodium oleate (NaOL) and pH 10.0. ... The impact of China's import ban on global …
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Fluorite particles as a novel calcite recovery depressant in scheelite
This novel flotation process was developed for the recovery of tungsten minerals in the Shizhuyuan Mine in China, where the normal-temperature flotation of tungsten minerals was investigated as a method to treat scheelite-calcite-fluorite-type ores as an alternative to the conventionally employed Petrov process (Han et al., 2017a, Han …
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Effect of Calcium Ion on the Flotation of Fluorite and Calcite …
In the flotation of semi-soluble minerals such as calcite and fluorite, Ca2+ is one of the common dissolved components influencing the collector adsorption behaviors on the mineral surfaces. However, there is very limited research focusing on how the dissolved Ca2+ affects the separation of fluorite and calcite. In the study, with sodium oleate …
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Froth flotation of fluorite: A review.
This article begins with introducing the deposits and unique physical and chemical properties of fluorite from the perspective of the crystal structure. It is followed …
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Surface chemistry considerations of gangue dissolved species …
The flotation recovery of bastnaesite significantly decreased from ∼95% to ∼25%, ∼15%, ∼80%, ∼25% when exposed to calcite, fluorite, barite, and mixed dissolved species, respectively.
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Froth flotation of fluorite: A review
This article begins with introducing the deposits and unique physical and chemical properties of fluorite from the perspective of the crystal structure. It is followed by a systematic …
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Selective Separation of Fluorite from Calcite Using …
The flotation test results showed that TA had a higher selectivity for fluorite than NaOL, leading to the selective separation of both minerals. Zeta potential measurements indicated that TA was negatively charged and was strongly adsorbed on fluorite due to electrostatic interactions at pH 9.0.
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A novel metal–organic complex surfactant for high …
Subsequently, flotation experiments were conducted to evaluate the complex collector's performance in scheelite and fluorite flotation. Furthermore, multiple characterization methods, such as mass spectrum, zeta potential, Fourier-transform ... Scheelite has emerged as the primary source of global tungsten resources. The …
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