flotation fluorite depressing po
The exploration of tannin extract as a green depressant in …
Micro-flotation experiment results revealed that TSG has great influence on the floatability of calcite at pH range of 6-11, the flotation recovery of calcite was only 6.61% at pH 9.0, while the ...
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The utilization of citric acid as a depressant for the flotation
The flotation recovery of fluorite decreased significantly, and the value dropped to approximately 5% at pH ~ 8, indicating that CA can be used as a depressant for fluorite in barite flotation at pH 8–11. Fig. 3 reveals the effects of CA on the flotation of fluorite and barite in the presence of 1.5 × 10 −4 mol/L NaOl. The flotation ...
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Pb-water glass as a depressant in the flotation separation of fluorite …
Fig. 2 shows the effect of the amount of water glass and pH on the separation of fluorite from calcite when using NaOL (80 mg/L) as a collector and water glass as a depressant. Fig. 2 a shows that in the pH range of 7–11, the flotation recoveries of calcite and fluorite both initially increased with increasing solution pH and then …
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Flotation separation of fluorite from calcite by a new …
flotation difference between fluorite and calcite was expanded by curdlan, thus enabling the flotation separation of fluorite/calcite. The selective depression mechanism of …
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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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Difficulties and Recent Achievements in Flotation Separation …
As an important strategic non-metallic mineral resource, fluorite has been widely used in various industrial fields, such as metallurgy, optics and semiconductor manufacturing, as well as fluorine-related chemical engineering. Since the major gangue minerals of fluorite ore are silicate and carbonate ones, flotation is the main …
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Selective adsorption mechanism of SHMP onto fine fluorite …
In each flotation test, a total mass of 2 g of mixed minerals (at a mass ratio of 1:1 of bastnaesite and fluorite) was dispersed in 35 mL distilled water (Mlipore deionized, resistivity of 18.25 MΩ cm). Fig. 1 shows the flotation circuits of artificially mixed minerals. The pH of the suspension was modified by the addition of HCl or NaOH at 8.5.
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Flotation of fluorite from ores by using acidized water glass …
Fluorite flotation tests were carried out with the actual and new schemes. Fig. 2 showed the photographs of the tailing slurries after being settled for 96 h from the flotation test with the actual scheme and being settled for 2 h from the test with the new scheme. With the actual scheme (Fig. 2 a), 96 h of sedimentation did not produce …
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Investigation of the depressants involved in the selective flotation …
Phosphate derivatives as sodium hexametaphosphate [(NaPO 3) 6], sodium phosphate (Na 3 PO 4), and sodium pyrophosphate (Na 4 P 2 O 7) are also widely used inorganic depressants for scheelite flotation from calcite and fluorite, known to chelate Ca 2+ ions in solution leading to a surface depletion in terms of calcium ions [6, 18, 32, 34 ...
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Flotation separation of bastnaesite from fluorite with an …
As the depressant of fluorite, a chemically pure PESA with a molecular weight between 400 and 1500 was provided by Shandong Yousuo Chemical Technology Co., Ltd., and its chemical structure was given in Fig. 2.The analytical-grade Octyl hydroxamic acid purchased from Shanghai Macklin Biochemical Co., Ltd. was employed …
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The anionic flotation of fluorite from barite using gelatinized starch
As shown in Fig. 2, the flotation recoveries of barite and fluorite were very high with NaOl alone, indicating the poor selectivity between fluorite and barite in the absence of GS.With the addition of 75 mg/L GS prior to NaOl, the flotation behavior of fluorite was not affected at pH 6.0-8.0 but slightly decreased to a certain extent at pH > 8.0.
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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 …
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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 …
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Flotation Separation of Fluorite from Calcite using an …
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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Flotation Depressant | SpringerLink
Flotation depressant is a flotation regulator that enhances the hydrophilicity of the mineral surface and destroys or weakens the adsorption of collector on minerals. Flotation depressants are generally classified into inorganic depressant and organic depressant. Inorganic depressants mainly include lime, zinc sulfate, sulfur dioxide, …
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(PDF) Reverse Flotation Separation of Fluorite from Calcite: …
A series of our single mineral flotation tests prov ed that reverse flotation separation of fluorite. from calcite can be achieved by using a novel re agent scheme of 3 × 10 − mol/L of HEDP and ...
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Depressing behaviors and mechanism of an eco-friendly …
DOI: 10.1016/j.molliq.2020.114898 Corpus ID: 229445199; Depressing behaviors and mechanism of an eco-friendly depressant on flotation separation of cassiterite and fluorite @article{Lv2021DepressingBA, title={Depressing behaviors and mechanism of an eco-friendly depressant on flotation separation of cassiterite and fluorite}, author={Liang Lv …
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Flotation separation of fluorite from calcite by a new …
flotation difference between fluorite and calcite was expanded by curdlan, thus enabling the flotation separation of fluorite/calcite. The selective depression mechanism of calcite by curdlan was investigated. It was found that curdlan was adsorbed by chemical bonding of its hydroxyl group with Ca on the calcite surface, having much greater ...
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Optimal Depressants and Collector Dosage in Fluorite …
thickness varies between 2 and 12 m, with grades of 1.85% of lead and 34% of fluorite. Specifically, the mineral used in the flotation tests is a slime by-product generated in the …
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Study on synergistic inhibition and mechanism of flotation …
Through the flotation process of primary roughing, primary sweeping and four-stage selection of fluorite ore, a qualified fluorite concentrate with CaF 2 grade of 95.52% and recovery of 91.20% was ...
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The mechanism of sodium silicate depressing fluorite in …
According to the study of single-mineral flotation tests, electrokinetic measurements and species distribution diagrams, the selective surface precipitation of calcium silicate on the fluorite was ...
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Evaluation of 2-phosphatebutane-1, 2, 4-tricarboxylic acid as …
It is hard to separate barite from fluorite due to their similar surface properties. In this work, to achieve the separation of barite from fluorite, 2-phosphatebutane-1, 2, 4-tricarboxylic acid (PBTCA) was used to depress fluorite, and the floatability, separation efficiency and mechanism were researched by micro-flotation tests, zeta potential …
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Effect of Calcium Ion on the Flotation of Fluorite and …
2.2. Flotation Tests Flotation was performed in a 150 mL mechanical flotation cell at 1400 rpm with an airflow rate of 0.125 L/min. Fluorite or calcite single mineral (5 g) was combined with 120 mL DI water and mixed for 1 min. NaOH solution was then added to adjust pH 9.0, at which fluorite and calcite may be floated with sodium …
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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 …
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Study on synergistic inhibition and mechanism of flotation
Through the flotation process of primary roughing, primary sweeping and four-stage selection of fluorite ore, a qualified fluorite concentrate with CaF 2 grade of …
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Flotation separation of fluorite from calcite using sulfonated …
For example, tannin and starch were used as depressants in fluorite flotation to depress calcite [5], [21], [22]. ... Depression mechanism of acid for flotation …
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Depressing behaviors and mechanism of an eco-friendly …
It could be found that GM could strongly depressed the flotation of cassiterite but nearly affected the fluorite flotation, and an excellent separation effect (fluorite recovery of 97.43%, cassiterite recovery of 4.54%) could be obtained at the conditions of pH 8.00, GM dosage of 1.0 mg/L and SPA dosage of 80 mg/L.
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Effect of sulfuric acid pretreatment on flotation performance …
2.2. Microflotation experiments. Micro-flotation experiments on the single minerals and an artificial mixed ore were carried out using an RK/FGC5-35 (Wuhan Lok Milling Equipment Manufacturing Co. LTD, Wuhan, China) flotation machine, with a stirring speed of 1600 rpm and an air flow rate of 15 cm 3 /min.. In each test, 2 g of a single …
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1-Hydroxyethylidene-1,1-diphosphonic acid used as pH
The results of flotation experiments show that the reverse flotation separation of fluorite from calcite at pH 6.0 can be well achieved with the reagent scheme of 3 × 10 −5 mol/L HEDP and 6 × 10 −5 mol/L NaOL. Moreover, by adjusting the pH to 8.0, the fluorite flotation depressed at pH 6.0. Declaration of Competing Interest
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Froth flotation of fluorite: A review
It has been well appreciated that the froth flotation is of the most importance. However, to the best of the authors' knowledge, it lacks a thorough and critical review on the recent developments in fluorite flotation. This article begins with introducing the deposits and unique physical and chemical properties of fluorite from the perspective ...
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