REEs, especially light rare earth elements (LREEs), are primarily extracted from bastnaesite ... Fig. 6 shows the effects of the XG concentration on the bastnaesite and fluorite flotation. Because the pH value of the pulp inevitably changed after reagents were added, maintaining the natural pH value of the pulp after adding the XG and then ...

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 ...

Abstract. Fluorite is the principal mineral of fluorine and usually coexists with quartz in deposits. The removal of fine quartz in fluorite concentrate is the main problem in fluorite flotation.

To achieve good flotation separation of fluorite from barite, especially in China, a number of depressants were investigated, such as mixed aluminum sulfate, water glass and tannin extract depressant (Yu et al., 2011), and mixed sodium fluorosilicate, dextrin, tannin extract and sodium hexametaphosphate depressant, etc. (Dong, 1996).

1. Introduction. Fluorite finds widespread use across industries with its isometric crystal structure and high calcium content, such as glass, chemicals ceramics, medicine, and metallurgy, etc. [1].The depletion of high-grade fluorite reserves in recent decades has highlighted the need for the effective extraction and use of low-grade …

In industrial utilization, these gangue minerals, especially calcite and fluorite, must be separated from celestite (Martı́nez-L and Ortiz, 2003). The separation of celesite and calcite is ... the flotation recovery of fluorite decreases most obviously in these three minerals and remains less than 20% within the vast majority of the ...

The flotation of the precipitates after seeding crystallization precipitant can recover 83.14% of CaF 2 with a grade of 64.42%, and the products can be used to replace parts of metallurgical-grade fluorite. As a result, the fluorine in the wastewater changed into useful products.

Fluorite (CaF2), as an important strategic mineral source, is usually separated from calcite by the common froth flotation method, but this separation is still not selective enough. The development of a …

With the depletion of rich fluorite ore, flotation process suitable for fine-grained fluorite is of great necessity. In this study, such method was preliminarily …

For fluorite minerals, a considerable shift in the zeta potential towards the negative direction was observed in the presence of TA, especially in the weakly acidic or neutral range, implying that TA was adsorbed onto the fluorite surface. This is in agreement with the adsorption and micro-flotation results.

Flotation experiments show that calcium oleate has a better flotation performance on fluorite than sodium oleate, especially at low concentrations, and flotation separation of fluorite and calcite ...

This original technology has a great potential for fluorite flotation, especially for complex and unmanageable fluorite ores containing high-grade calcite, even with the use of large amounts of SS and other depressants. Therefore, these unexploited fluorite ores can be recycled through this novel fluorite flotation method.

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 …

The effect of depressant citric acid (CA) on flotation separation of celestite from fluorite and calcite using anionic collector sodium dodecyl sulfate (SDS) is investigated. Through a series of micro-flotation tests, solution chemistry and reaction thermodynamic analysis, zeta potential measurements and Fourier transform infrared …

Using sodium oleate (NaOL) as a collector, the flotation characteristics of natural colorless fluorite (CF), green fluorite (GF), and purple fluorite (PF) were …

Fluorite particles slowly release fluoride ions (F-) to chemisorb on calcite surface.. The amount slow-released F-is small but this released process is continuous.. The inhibiting effect of fluorite is better than that of sodium fluoride. • Fluorite particles can achieve the flotation separation of magnesite from calcite.. CaF 2 films are easily …

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 …

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 [23,24,25,26,27]. The pK θsp value of fluorite varies from 8.27 to 11.23 in the relevant literature, around 10.5 in most cases [ 28, 29 ].

1. Introduction. Fluorite is the only raw material needed for the production of hydrofluoric acid and is a non-renewable resource. Most fluorite ores have to be upgraded before entering the fluorite market, and the commonly used beneficiation process is flotation (Ayhan et al., 2013).The most commonly used collector 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 ...

Flotation separation of fluorite from calcite can be achieved with sesbania gum. •. An adsorption model and separation model are finally obtained. Abstract. The …

Flotation of flurotite is reviewed. •. Collectors, depressants, regulators, modifiers and frothers applied to fluorite flotation are described. •. Synergistic effect of …

It is difficult to separate scheelite especially from fluorite with fatty acid collectors because the adsorption mechanism of these collectors occurs through chemisorption of the oleate ion onto the mineral surface. A simplified flotation process using Pb-BHA complexes was developed to replace the energy-inefficient Petrov's …

High-purity fluorite is popular in industrial production, especially in the chemical industry (Chen et al., 2019b). The minimum CaF 2 content in qualified fluorite products should be above 93%, and the maximum CaCO 3 amount should be less than 1%. Therefore, Beneficiating mined fluorite through flotation is indispensable prior to the …

The article presents experimental research into intensification of fine-disseminated carbonate-fluorite ore flotation by adding FLOTOL-7,9 agent. It is shown that the optimal agent modes allow the yield of the saleable fluorite product of above 90% CaF2 grade at higher than 60% fluorite extraction.

The flotation results showed that the recovery of fluorite decreased by 89.71% when 4 mg/L PESA was added to the flotation system, while the bastnaesite recovery only exhibited a slight reduction ...

In the separation of fluorite from calcite by flotation various fatty acids (especially, oleic acid and sodium oleate), oleic acid emulsions with petroleum sulphonates, different mixtures of fatty ...

Fluorite, as a scarce non-renewable strategic non-metallic mineral resource, is the primary raw material for fluorine products used in diverse fields such as metallurgy, national defense,...

In addition, the flotation results of the tailings from Jiangxi containing fluorite and calcite, indicated that the grade and recovery of fluorite increased from 87.18% and 40.99% for 0 days to 93 ...

Flotation results showed that, in the presence of sodium oleate (NaOL) and SPS, the flotation recovery difference between fluorite and celestite reached 76.26% and the grade of fluorite ...