flotation fluorite especially

Flotation is the most efficient method to recover this type of fluorite. Fluorite and calcite contain Ca 2+. During flotation, the physical and chemical properties of the …

Flotation tests on fluorite ores with various carbonate content (CaCO 3 contents from 4.43% to 74.40%) were carried out using acidized sodium silicate ... The recovery of fluorite decreases with increase of calcite contents in the ore, especially when the carbonate modulus is less than, or around 1. In this circumstance, despite the fact …

Thus, it is necessary to perform research concerning the utilization of TE in the separation of fluorite and calcite, especially in the aspect of the interaction mechanism of TE with minerals' surface. Hence, the object of this work is to investigate the potential of TE as a high-performance depressant in the flotation of fluorite from calcite.

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).

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 …

Fluorite flotation is an important area of study due to its broad application prospects, which attracts a lot of attention. ... When the solution pH is strongly alkaline (pH > 13), the sum-frequency signal intensities are strengthened, especially those peak at 3185 and 3590 cm −1. It is worth noting that the change in the 3740 cm −1 signal ...

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 …

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 flotation recovery of bastnaesite was significantly affected by dissolved fluorite and barite species. After treatment with fluorite and barite supernatants, the flotation recovery sharply decreased from 62.16% to 8.11% and 24.09%, respectively, at pH 3 and from 90.00% to 9.68% and 39.61%, respectively, at pH 11.

The flotation behavior of fluorite and calcite in the absence and presence of SG was studied through micro-flotation tests. The separation effect of SG on the two minerals was determined by artificial mixed mineral tests. ... especially calcite, and flotation is the most efficient method to obtain high-grade fluorite concentrate (Kupka …

Pulp pH value plays a significant role in the froth flotation. Especially in the flotation of fluorite, the performance of flotation will be affected greatly by pulp pH. MO, a new kind of modified fatty acid was used as collector, and H2SO4 and Na2CO3 were used to regulate pulp pH in the experiment. The mechanism of influence of pulp pH on …

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 …

In this review, analyses of the fundamental reasons for the difficulties of flotation separation of fluorite from calcite are performed, from the similar surface …

Flotation experiments indicated that efficient flotation separation of fluorite from barite could be achieved with 15 mg/L GG as depressant and 100 mg/L NaOL as collector and at pH 7.5. In this situation, a high-quality concentrate with CaF 2 grade and recovery of 85.24% and 86.73% was obtained in artificial mixed minerals flotation test.

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 developed with a combination of in-situ surface modification and gas-liquid microdispersion. ... especially that of SiO 2. As a consequence, under acidic conditions, single SiO 2 ...

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

The flotation recovery of scheelite and fluorite keeps at about 75% and 10%, respectively, at the pulp pH 9.3~9.6 and PA-Na concentration from 30 to 50 mg/L. IR spectra results suggest that PA-Na ...

WG with fine fluorite barrier and increased higher quartz modulus and from therefore, 0.94 exhibited 10 improved more to 6.11 depression more 10 on KT. the effect flotation on the selectivity ...

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 ...

Especially in the flotation of fluorite, the performance of flotation will be affected greatly by pulp pH. MO, a new kind of modified fatty acid was used as collector, and H2SO4 and Na2CO3 were ...

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 ...

The fluorite/oleate system has been studied extensively since the begin- nings of flotation research. The well-defined relatively simple crystal structure of fluorite and its ionic bonding make it a model system for study. Our understanding of fluorite/ oleate flotation chemistry continues to grow but as yet remains incomplete. Besides a review of our understanding …

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 ...

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.

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 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.

sulphide ores [13], especially for the flotation of fluorite [7]. However, the flotation separation of fluorite from quartz using water glass is not so effective, as there is always a small amount of fine quartz (less than 10 m) in the fluorite concentrate. The floated fine quartz in fluorite concentrate has been reported to be the result of ...

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.

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

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

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 …

Pulp pH value plays a significant role in the froth flotation. Especially in the flotation of fluorite, the performance of flotation will be affected greatly by pulp pH. MO, a new kind of modified fatty acid was used as collector, and H2SO4 and Na2CO3 were used to regulate pulp pH in the experiment. The mechanism of influence of pulp pH on flotation of …