The complex behavior of fatty acids in fluorite flotation
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 ...
Selective flotation of fluorite from barite using trisodium phosphate
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).
Interaction Forces between a Calcium Dioleate Sphere and …
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 ...
Slow-release of fluorite and its effect on flotation …
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 …
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 ...
Intensifying fine-grained fluorite flotation process …
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 …
Combing Seeding Crystallization with Flotation for Recovery …
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.
Hydrophobic behavior of fluorite surface in strongly alkaline …
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 ...
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 ...
Influence of Pulp pH on Flotation of Fluorite and Calcite
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 ...
Effect of an Environment-Friendly Depressant on the Flotation …
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 ...
Flotation separation of fluorite from calcite by using …
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 …
Influence of Pulp pH on Flotation of Fluorite and Calcite
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 …
Effect of a CA depressant on flotation separation of celestite …
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 …
OneTunnel | Flotation Chemistry of the Fluorite/Oleate system
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 …
The Role of Water Glass in the Flotation Separation of …
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 ...
(PDF) Study on synergistic inhibition and mechanism of flotation …
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 ...
Difficulties and Recent Achievements in Flotation …
In this review, analyses of the fundamental reasons for the difficulties of flotation separation of fluorite from calcite are performed, from the similar surface …
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 …
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 …
The Role of Water Glass in the Flotation Separation …
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.
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 …
The role of gellan gum in the selective flotation separation …
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 …
Influence of Pulp pH on Flotation of Fluorite and Calcite
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 …
Difficulties and Recent Achievements in Flotation Separation …
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 ].
Utilization of gellan gum as a novel eco-friendly depressant …
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.
Adsorption of tannic acid as depressant in the flotation …
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.
Replacing Petrov's process with atmospheric flotation using …
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 …
Surface chemistry of xanthan gum interactions with …
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 ...
Minerals | Free Full-Text | Flotation Behavior of …
Using sodium oleate (NaOL) as a collector, the flotation characteristics of natural colorless fluorite (CF), green fluorite (GF), and purple fluorite (PF) were …