Fluorite is an important strategic mineral. In general, fluorite ores will contain a certain amount of calcite gangue mineral. Thus, they need to be separated from each other. For an economic separation, a reverse flotation process is used to float calcite gangue from fluorite. However, little information on the separation is available. In this …

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 …

As an alternative to agitated cells, bubble columns—used in chemical engineering practice as chemical reactors—were proposed for the treatment of fine …

Materials Science, Chemistry. 1992. Salt-type minerals flotation is discussed, based mainly on experiments on magnesite, dolomite and calcite. Among the parameters affecting flotation, the following are examined: crystal structure,…. Expand. Semantic Scholar extracted view of "Flotation chemistry of the fluorite/oleate system."

Cu 2+ was found to have intensive and selective depressing effects on fluorite in the flotation separation of cassiterite from fluorite using 2-carboxyethylphenylphosphinic acid (CEPPA) as a collector at pH 4.0. The depressing mechanism was investigated by flotation tests, zeta potential measurements, X-ray …

In fluorite flotation, fatty acids and their derivatives are used as collectors for fluorite [1,2]. The common opinion for the collecting mechanism is the chemisorption that derives from the chemical interactions between the …

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 …

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 invention discloses a collector for the floatation of fluorite at a low temperature. The collector comprises the following raw materials in weight portion: 35 to 45 portions of fatty alcohol polyethenoxy ether carboxylic acid sodium, 40 to 50 portions of sodium cetanesulfonate, and 8 to 12 portions of fatty acid methyl ester sodium sulfonate.

Fluorite (CaF 2) is by far the most important fluorine-bearing mineral phase in the Earth's crust.It is mostly used for manufacturing glass, cement, fillers, and hydrofluoric acid, and as a flux in steel-making in various industries [1,2,3].In order to obtain high grade fluorite raw materials (CaF 2 ≥ 97%), froth flotation has been the most commonly used …

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 adjusting the pH value after adding the OHA ensured that it worked under appropriate pH …

The depressing properties of sodium polyacrylate (PA-Na) for scheelite and fluorite were studied by micro-flotation tests, infrared spectroscopy (IR), zeta potentials, X-ray photoelectron spectroscopy (XPS), and density functional theory (DFT). The flotation results reveal that the selective depression effect of PA-Na is better than that of sodium …

In this study, the flotation separation of cassiterite (SnO 2) and fluorite (CaF 2) was enhanced by using hydroxylcitric acid (HCA) as fluorite inhibitor and 2-carboxyphenyl phosphonic acid (CEPPA) as collector. With a reagent scheme of 120 mg/L CEPPA and 4.5 mg/L HCA at pH 10.0, the flotation recovery of cassiterite and fluorite …

The influences of long-term static interaction between flotation reagents and minerals on mineral surface properties and their flotation behaviors were investigated in this work. Single mineral results showed that when the static interaction time between flotation reagents and minerals increased from 0 to 8 days, there were no significant …

The recovery of scheelite from calcium-bearing carbonate ores by flotation is challenging due to its low separation efficiency. This study investigated the effect of pentasodium diethylenetriaminepentaacetate (PD) on the surface properties of scheelite and fluorite. For this purpose, we performed micro-flotation tests and carried …

Flotation collectors used in the recovery of bastnaesite are similar with those used in that of its associated gangue minerals such as fluorite and calcite, which is due to the similar reactivities of rare earth ions in the bastnaesite surface with Ca 2+ ions in the surfaces of fluorite and calcite [8]. It is necessary to develop novel ...

The invention provides a kind of carbonate-cost-effective flotation separation method in fluorite ore deposit, be specially adapted to the FLOTATION SEPARATION in the high fluorite ore deposit of carbonate content.Its key is to select the inhibitor-acidified sodium silicate and the dosing measure of effective carbonate mineral, under the common …

Oleic acid serves as a conventional collector in fluorite flotation. N-hydroxy-9,10-epoxy group-octadecanamide (N-OH-9,10-O-ODA) is derived from oleic acid by incorporating an epoxy group into the structure of oleic acid and converting the carboxyl group, the polar moiety of oleic acid, into an N-hydroxy amide group. N-OH-9,10-O-ODA …

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.

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 …

Abstract. The efficient separation of fluorite and calcite is a challenging task in the field of mineral processing because of their similar chemical and physical properties. In this research, octylamino- bis - (butanohydroxamic acid) (OBHA) was introduced as collector into a flotation system comprising fluorite and calcite, and the separation ...

Figure 1. XRD pattern of powered fluorite. Figure 2. Chemical structures of sulfonate-based collectors. 2.2. Methods 2.2.1. Micro-Flotation Tests The micro-flotation tests were carried out in a laboratory XFG-35 flotation apparatus (Rock Crush & Grand Equipment Co., Ltd., Wuhan, China) with an effective volume of 120 mL at room temperature.

In this study, two new collectors for fluorite flotation DP-OMC-1033 (DP-I) and DP-OMC-1234 (DP-II) were tested and compared with oleic acid (OA), sodium oleate (SO) and potassium oleate (PO). According to fluorite grade and fluorite metallurgical recovery, the effect of each collector was determined, both in mechanical and pneumatic …

Froth flotation technology has been around for about 150 years. The first true flotation process was described by the Bessel brothers in a patent from 1877 [].Although the brothers Adolph and August co-owned a factory in Dresden, it appears that Adolph (28 September 1835, Wunstorf—12 July 1886, Dresden) was actually the inventor of the process.

The effect of fluorite particles on the flotation is shown in Fig. 2. As shown in Fig. 2 a, the recovery of magnesite without depressant treatment significantly increases from 36.09% to 78.62% when the pH increases from 6.0 to 9.0. Then the curve presents a declined trend, which decreases from 78.62% to 37.68% with pH from 9.0 to 11.0. ...

fluorite, common halide mineral, calcium fluoride (CaF 2 ), which is the principal fluorine mineral. It is usually quite pure, but as much as 20 percent yttrium or cerium may replace calcium. Fluorite occurs …

Therefore, the development of efficient fluorite flotation has been a hot topic for decades, and our goal is to summarize recent advances in flotation of fluorite, and to guide the future utilization of limited fluorite resources.

Scheelite and fluorite are often associated with raw ores (Foucaud et al., 2018, Gao et al., 2015a).The separation of scheelite from fluorite has been achieved in an alkaline pulp within pH 9–10 (Han et al., 2020). pH = 9 has been previously reported as the most suitable pH condition for the flotation separation of fluorite from its mixture with …

Froth flotation is a physicochemical separation process in which a mixture of fine mineral particles is mixed with water in a large tank (cell), and a swarm of small air bubbles …

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

The present invention relates to the method for adjusting agent flotation fluorite ore deposit.The present invention adopts by acid, the intermixture that alkali and synergist are formed is as adjusting agent, adopt oleic acid or rubber enuatrol as collecting agent, technological process is a set composite, carries out the flotation in fluorite ore deposit …

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 ...

A low grade fluorite and barite flotation separation method uses waterglass as the inhibitor for silicious mineral and calcium carbonate mineral; uses oleic acid as the collector for fluorite and barite; and uses starch, sodium sulphate, hydrochloric acid and sodium hexametaphosphate as the inhibitor for barite mineral. The invention can perform …