The flotation recovery of fluorite and calcite with 3 × 10 −4 mol/L OBHA or 4 × 10 −4 mol/L OHA as a function of slurry pH is shown in Fig. 5. According to Fig. 5, when OBHA and OHA were used as the collectors, the recovery of fluorite gradually increased with increasing pulp pH, and the maximum recovery was obtained in an alkaline ...

Fig. 2 indicates the fluorite & bastnaesite recoveries within separate mineral flotation at pH 4–12 (the amount of SO is fixed at 80 mg/L). When the pH value falls between 6.71 and 12.0, the fluorite recovery rate is greater than 95 %. In terms of the bastnaesite recovery rate first increases and then drops as the pH value increases.

Corpas-Martinez et al. 21 modified Hallimond tubes for flotation of fluorite and determined the effectiveness of each collector, both in mechanical and pneumatic cell flotation. In this study, a self-developed Hallimond flotation tube was used for single …

In this study, fluorite flotation tests were performed by using a mixture of tannin and sodium humate as a depressant of calcite.

Sulfate minerals have gradually become the main gangue minerals of fluorite deposits, and the flotation separation of fluorite and sulfate minerals is difficult with commonly used depressants. In this paper, the high selectivity of a novel depressant sodium polynaphthalene formaldehyde sulfonate (SPS) for the flotation separation …

The fluorite (CaF 2) lump and calcite (CaCO 3) lump used in this study from a fluorite mine in Hunan province and the Ye's mineral specimen group in Guangdong province, China, respectively.After manual crushing, agate grinding and wet screening, the –150 + 37 µm size fractions were used for flotation experiments, FTIR spectroscopy and …

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.

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 …

The flotation separation of fluorite, barite and calcite with OEBA collector was performed. Based on the findings and discussion, we could draw the following conclusions. OEBA realized the efficient flotation separation of fluorite and barite from calcite at pH ∼ 9.0, and that of barite from fluorite at pH ∼ 11.0.

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 (A.S.S.) as modifier and oleic acid as collector. A high purity fluorite concentrate (99% CaF 2) was obtained.It was demonstrated that A.S.S. has an activating effect on fluorite and a …

To address the complex composition of fluorite tailings, flotation technology is commonly used for processing. The main steps of flotation processing include: Ore Crushing and Grinding: Firstly ...

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 of fluorite mineral from ores by using acidized water glass as depressant has been studied for substitution of the commonly used depressant. It was found that the acidized water glass could achieve higher selectivity of fluorite minerals against gangue minerals in the fluorite flotation. The experimental results showed that YF ...

Microflotation results showed that the high recoveries of both fluorite and calcite flotation could be obtained when the NaOl was over 38 mg/L; the addition of > 50 mg/L TE could completely depress the floatability of calcite while it slightly affected the …

Fluorite, a valuable mineral in the metallurgical industry, can be found together with silicates, carbonates and oxides in ore deposits. Commercial concentrates with more than 95 % of CaF2 are obtained processing the mineral in flotation plants and using oleic acid as fluorite collector. Depressor reagents such as sodium silicate, tannin …

At present, the separation technology of fluorite and calcite is still immature, and the research in this paper can promote the improvement of the separation technology of fluorite and calcite. The selective inhibition mechanism of tannin and humate sodium on calcite was studied by means of actual ore flotation test, single mineral flotation test, …

Para la obtención de concentrados comerciales, más de 95 % de CaF2, el mineral se procesa en. plantas de flotación donde se usa ácido oleico como colector de la fluorita. Para que el ácido oleico actúe selectiva-. mente es común el uso de reactivos …

For fluorite ores, fatty acid and sodium silicate are frequently used as a collector and depressant, respectively [19], [20], [21]. Innovations and combinations of various additives comprise a significant share of the advanced investigations in fluorite flotation [22], [23], [24]. In some situations, effective flotation could be realized with ...

Fluorite, a kind of critical non-metallic minerals, is the primary source of industrial fluorine. Sodium oleate (SO) is commonly used as the collector of fluorite ores. However, because of its some features (such as the low solubility, high solidifying point, and poor dispersion of SO) at low temperatures, it profoundly inhibits its collecting ability as …

The above results present that TE could be used as a selective depressant to depress calcite flotation while allowing fluorite flotation when using collector fatty acid. Download : Download high-res image (140KB) Download : Download full-size image; Fig. 3. The flotation behaviors of fluorite and calcite as a function of TE dosage.

The authors provide insight into the problem of selective flotation of fluorite from carbonate-fluorite ores. It is found that oxyhydrate collectors used in combination with sodium fluoride provide rather high level of selectivity in fluoride flotation from poor high-carbonate ores and make it possible to eliminate high-temperature pulp treatment with …

Single mineral flotation tests were conducted in an XFG flotation machine at a spindle speed of 1700 rpm (Wang et al., 2016).The XFG machine configuration has been reported in our previous publication (Gao et al., 2016a).The mineral suspension was prepared by adding 2.0 g of single mineral or mixed binary mineral samples (1 g fluorite …

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 …

Combined with the rheological investigations on the flotation pulp in 3.1 The hetero-coagulation between the fine fluorite and quartz in aqueous suspension, 3.2 The hetero-coagulation between the fine fluorite and quartz under flotation conditions, it can be concluded that it is the hetero-coagulation that exhibits the negative effect on the ...

Using sodium oleate (NaOL) as a collector, the flotation characteristics of natural colorless fluorite (CF), green fluorite (GF), and purple fluorite (PF) were investigated through micro-flotation tests, collector adsorption measurements, and surface tension measurement. The micro-flotation results indicated that CF had a much better …

DOI: 10.1016/S0301-7516(96)00027-0 Corpus ID: 97025309; The significance of collector colloid adsorption phenomena in the fluorite/oleate flotation system as revealed by FTIR/IRS and solution chemistry analysis

The flotation performance of barite and fluorite at pH 7.5 as a function of GS dosage was presented in Fig.3. It shown that the flotation recovery of barite decreased significantly from 90% to less than 5% with the increasing GS dosage. However, the flotation recovery of fluorite was almost not affected in the presence of GS.

Fig. 7. E®ect of oleic acid dosage on °otation grade and. recoveries of °uorite at 22 C and pH ¼9. Improving Fluorite Flotation under Low Temperature and Neutral pH Conditions. December 5 ...

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 …

The fluorite and calcite samples used in the tests were natural mineral crystals collected from Hunan, China. The mineral crystals were burst, picked, crushed, ground, and screened through standard sieves of 0.074 mm and 0.037 mm. Samples with a particle size of 0.037–0.074 mm were used for the flotation tests and analyses.