Depressing behaviors and mechanism of an eco-friendly …
Froth flotation has become the dominant technique for separating cassiterite and fluorite. However, due to the limited selectivity of conventional collectors, fluorite was always collected with ...
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Flotation separation of fluorite from calcite by a new …
Floatation test results showed that the flotation difference between fluorite and calcite was expanded by curdlan, thus enabling the flotation separation of fluorite/calcite. The selective …
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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.
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Investigation of the depressants involved in the selective flotation …
Flotation tests were performed on a skarn ore to attain the selective separation of scheelite (CaWO 4 ) from fluorite, apatite, and silicates. Fluorite and apatite constitute common gangue ...
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Flotation Separation of Scheelite from Fluorite Using …
The depressing properties of sodium polyacrylate (PA-Na) for scheelite and fluorite were studied by micro-flotation tests, infrared spectroscopy (IR), zeta potentials, X-ray photoelectron ...
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Solution Chemistry Study of Salt-type Mineral Flotation …
Selective depressing conditions for different salt-type minerals using Na 2 SiO 3 and Na 3 PO 4 as depressants were determined on the basis of solution chemistry calculations of the systems. ... The former is capable of depressing fluorite flotation at a lower concentration over a wider suspension pH range than the latter. This prediction was ...
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Flotation Depressants
First let's change the amount of the Flotation Depressants used. The valuable mineral that isn't liberated from the unwanted mineral will begin to be 911 Metallurgist is a trusted resource for practical insights, solutions, and support in mineral processing engineering, helping industry professionals succeed with proven expertise. | Flotation ...
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Flotation separation of fluorite from calcite by a new …
In this study, curdlan was used as an efficient and eco-friendly calcite depressant for flotation of fluorite/calcite. Firstly, the structure and molecular weight of curdlan were characterized. Floatation test results showed that the flotation difference between fluorite and calcite was expanded by curdlan, thus enabling the flotation separation of fluorite/calcite. The …
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The flotation separation of fluorite from calcite using …
The floatability of fluorite and calcite as a function of NaOl dosage at pH 8.0 is shown in Fig. 4.As seen in Fig. 4, flotation recoveries of fluorite and calcite significantly increased with increasing dosage of NaOl and remained constant at high collector concentration.The flotation recovery of both fluorite and calcite was over 90 % using 1.5 × 10 −4 mol/L NaOl, …
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Comparison Between Performance of Fluorite Flotation …
It has been shown that carrying out flotation of fluorite at pH higher than 9.5 leads to a greater flotation of carbonates, even when using different types of depressants. The effect of pH on the flotation of fluorite with QT has been studied quite thoroughly. In practical applications, the pH ranges from 8 to 9.5.
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Froth flotation of scheelite – A review
SP is nowadays used in fluorite flotation as a dispersant and an apatite depressant [86]. Bel'kova et al. [8] have also used polyphosphates for depressing apatite in scheelite flotation, which lead to an increase in grade of 4.4% WO 3 in a plant trial.
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1-Hydroxyethylidene-1,1-diphosphonic acid used as pH …
Fluorite is an important strategic mineral source for the production of fluorine-based chemicals and materials, including those used for engineering and technological applications (Gao et al., 2016b, Gao et al., 2018, Zhang and Song, 2003).In nature, fluorite is usually associated with calcite, Ca-silicate and other Ca-containing minerals, and separated …
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The flotation separation of fluorite from calcite using …
Flotation experiments indicated that GG exhibited strong depressing effect on the barite flotation, whilst it showed little impact on the fluorite flotation. Zeta potential tests and surface wettability analyses demonstrated that GG intensely adhered onto barite and strongly prevented the subsequent NaOL adsorption, while it barely affected the ...
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Effect of phytic acid on the surface properties of scheelite …
First, the flotation separation using NaOl at a dosage of 4 × 10 −5 mol/L was evaluated by a single mineral test. As shown in Fig. 2, the flotation results indicate that the recovery of scheelite increased gradually with increasing pH.Above pH 8.5, the floatability was indistinctively reduced. In addition, it can be seen that the recovery of fluorite increased with …
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Experimental and density functional theory studies of the …
Cu 2+ was found to have intensive and selective depressing effects on fluorite in the flotation separation of cassiterite from fluorite using 2-carboxyethylphenylphosphinic acid (CEPPA) as a collector at pH 4.0. The depressing mechanism was investigated by flotation tests, zeta potential measurements, X-ray photoelectron spectroscopy (XPS) analyses and density …
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Adsorption and depression mechanism of an eco-friendly …
In this work, dextrin, an effective and eco-friendly organic compound, was used to separate fluorite from calcite.The depression performance and adsorption mechanism of it on the calcite surface were investigated by flotation experiments, contact angle measurements, Fourier transform infrared spectroscopy (FTIR) measurements, and X-ray photoelectron spectroscopy …
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Quantitative study on the selective depressing effect of
Quantitative study on the selective depressing effect of polysaccharides on some polar minerals. Author links open overlay panel Jizhen Wang, ... (Fe 2 O 3) > Aptite(Ca 5 [PO 4] 3 (F,OH)); Bastnaesite(Ce ... Fluorite flotation separation from bastnaesite via an eco-friendly polymer as a depressant and insight into its mechanism of adsorption.
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Evaluation of 2-phosphatebutane-1, 2, 4-tricarboxylic acid as …
Micro-flotation results showed that sodium dodecyl sulfonate (SDS) had an extremely good collecting capability for fluorite and barite, while PBTCA selectively depressed …
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Effect of phytic acid on the surface properties of scheelite …
Phytic acid (PA) (C 6 H 6 (H 2 PO 4) 6), known as inositol hexakisphosphate (IP6), is a natural and substance extracted from cereal grains and seeds and has been widely used as cleansing and water treatment agent as well as food and cosmetic additives.It has been proven to be non-toxic to humans and "green" to the environment [28,29]. The most attractive …
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Flotation separation of bastnaesite from fluorite with an …
Flotation experiments demonstrate that employing THODA as a collector can yield a fluorite recovery of approximately 90%, while the recovery rate of calcite ranges between 10% and 20%. THODA exhibits a superior selectivity in the flotation separation of fluorite and calcite compared to oleic acid.
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1-Hydroxyethylidene-1,1-diphosphonic acid used as pH …
If calcite can be removed from fluorite ore in advance via a reverse flotation method, i.e. depressing fluorite and floating calcite, SS may be used in smaller amounts or even abandoned. The fluorite is then further activated and recollected. Meanwhile, the pre-removal calcite can be further enriched and then applied in many industries without ...
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1-Hydroxyethylidene-1,1-Diphosphonic Acid Used as pH
Sodium hydroxide, sodium carbonate and sulfuric acid are commonly used as pH regulators in flotation separation of fluorite and calcite [83,100].The flotation behavior of fluorite at a high pH ...
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Effect of an Environment-Friendly Depressant on …
To overcome the difficulty of separating bastnaesite from fluorite through the flotation technique, the present study examined the suitability of sodium alginate (SA) as a depressant in the flotation process.
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Investigation of two-stage depressing by using hydrophilic …
This study revealed that two-stage depressing using a hydrophilic polymer can comprehensively improve the process of fluorite flotation. The batch flotation experiments …
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Selective flotation of fluorite from barite using trisodium phosphate
Psyllium seed gum, a reagent naturally derived from psyllium seed, was used for the first time as an efficient depressant in the flotation separation of fluorite and calcite. Micro-flotation experiments showed that psyllium seed gum had a strong depressing effect on calcite at a wide pH range (8–12).
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The mechanism of sodium silicate depressing fluorite in …
Flotation tests were performed on a skarn ore to attain the selective separation of scheelite (CaWO 4 ) from fluorite, apatite, and silicates.
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Improvement Effect of FeSO4·7H2O on Flotation Separation …
1. Introduction. Scheelite (CaWO 4) is an important mineral for extracting tungsten and usually associated with fluorite in Chinese scheelite deposits. 1,2 The utilization of refractory scheelite deposits—wolframite resources that can be easily separated via the gravity method and are almost depleted—has become important. Conventional flotation practice for separating …
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Solution Chemistry Study of Salt-type Mineral Flotation …
The surface precipitation of calcium silicate or phosphate on fluorite and calcite was identified as a major depression mechanism. Selective depressing conditions for different …
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The utilization of citric acid as a depressant for the flotation
Fig. 2 presents the flotation behaviour of single fluorite or barite as a function of pH. Fig. 2 shows that good floatability of both fluorite and barite was achieved across the entire studied pH range with the addition of NaOl alone, especially in the pH range of 7–10.
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Optimal Depressants and Collector Dosage in …
Froth flotation is a heterocoagulation process where target mineral particles within an aqueous pulp selectively attach to air bubbles, forming particle–bubble aggregates, which are subsequently transported out of the pulp into a froth …
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