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 …
اقرأ أكثر
Study on synergistic inhibition and mechanism of …
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 …
اقرأ أكثر
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 …
اقرأ أكثر
Mechanism of HCA and CEPPA in flotation separation of
The invention of bronze wrote down a glorious page in the history of human civilization, which is called the Bronze Age (Gao et al., 2021, ... The flotation of fluorite was intensively depressed by the depressant HCA whereas the flotation performance of cassiterite was only affected under the conditions of strong acid and strong alkali. The ...
اقرأ أكثر
Minerals | Free Full-Text | Flotation Behavior of Different Colored
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 …
اقرأ أكثر
An integrated experimental and computational
Oleic acid is a widely utilized collector in fluorite flotation. A novel hydroxamic acid collector, N,9,10-trihydroxyoctadecanamide (THODA), has been developed based on the molecular structure of oleic acid. Compared to oleic acid, THODA exhibits a superior selectivity in the flotation separation of fluorite and calcite.
اقرأ أكثر
CN105289848A
The invention discloses a fluorite flotation method. The method comprises the steps that fluorite ores are used as raw materials, modified oleic acid ionic liquid is used as a collecting agent, sodium silicate is used as an inhibitor, sodium carbonate is used as a pH value conditioning agent, an XFD series flotation machine with the volume being 1.5 L is …
اقرأ أكثر
The Role of Water Glass in the Flotation Separation …
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 …
اقرأ أكثر
Flotation Separation of Scheelite from Fluorite Using …
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 …
اقرأ أكثر
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 properties of both calcium minerals to the …
اقرأ أكثر
Improving the finely disseminated carbonate-fluorite ore flotation …
The flotation results showed that this synthesized collector could float fluorite very well in a pH range of 8.5–9.5 at the acid number of 120 mgKOH/g and it exhibits excellent collecting ...
اقرأ أكثر
Flotation of fluorite from ores by using acidized water glass …
Fluorite flotation tests were carried out with the actual and new schemes. Fig. 2 showed the photographs of the tailing slurries after being settled for 96 h from the flotation test with the actual scheme and being settled for 2 h from the test with the new scheme. With the actual scheme (Fig. 2 a), 96 h of sedimentation did not produce …
اقرأ أكثر
Froth flotation of fluorite: A review
PMID: 33676242. DOI: 10.1016/j.cis.2021.102382. Abstract. Fluorite, as a scarce nonrenewable strategic non-metallic mineral resource, is the primary raw material for …
اقرأ أكثر
Intensifying fine-grained fluorite flotation process with a …
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 ...
اقرأ أكثر
Slow-release of fluorite and its effect on flotation …
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. ...
اقرأ أكثر
Effect of Fluoride Ion on the Separation of Fluorite from
As a common depressant, acidified water glass (AWG) has strong inhibitory effects on fluorite and calcite. The inhibited fluorite is difficult to be recovered, thus resulting in the waste of resources and low flotation efficiency. In this study, the interaction of fluoride ions with fluorite and calcite surfaces was investigated, and its effects of AWG …
اقرأ أكثر
Fluorite | Crystals, Uses, Properties | Britannica
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 …
اقرأ أكثر
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.
اقرأ أكثر
Mechanism of HCA and CEPPA in flotation separation of …
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 …
اقرأ أكثر
Evaluation of Sulfonate-Based Collectors with Different …
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.
اقرأ أكثر
(PDF) Reverse Flotation Separation of Fluorite …
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 ...
اقرأ أكثر
A novel surfactant N-hydroxy-9,10-epoxy group
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 …
اقرأ أكثر
Understanding the sequential flotation separation of fluorite…
It indicates that for the barite-fluorite bulk flotation and then separation (process 1), the recovery and grade of barite in its concentrates reached ∼ 91.7 % and 93.8 %, and those of fluorite in its concentrates were of ∼ 77.3 % and 81.3 %, respectively. For the sequential flotation separation (process 2), the recovery and grade of barite ...
اقرأ أكثر
CN87105202A
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 …
اقرأ أكثر
Minerals | Free Full-Text | The Contribution of Long-Terms …
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 …
اقرأ أكثر
Minerals | Free Full-Text | Selective Separation of Fluorite …
Fluorite and scheelite, which are strategic calcium-bearing minerals, have similar active sites (Ca2+); as a result, the efficient separation of the two minerals is still one of the world's most difficult problems in the field of flotation. In this work, N-decanoylsarcosine sodium (SDAA), a non-toxic and low-cost amino acid surfactant, was …
اقرأ أكثر
PROCESS FOR THE FLOTATION OF FLUORITE
PROCESS FOR THE FLOTATION OF FLUORITE . United States Patent 3623605 . Abstract: Improvement in flotation of calcium fluoride from clay-containing ores which comprises conditioning the flotation slurry with an alkyl phenol ethoxide and a fatty acid ethoxide prior to adding the usual flotation reactants. ... Having thus described our …
اقرأ أكثر
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 …
اقرأ أكثر
Effect of Calcium Ion on the Flotation of Fluorite and Calcite …
In the flotation of semi-soluble minerals such as calcite and fluorite, Ca2+ is one of the common dissolved components influencing the collector adsorption behaviors on the mineral surfaces. However, there is very limited research focusing on how the dissolved Ca2+ affects the separation of fluorite and calcite. In the study, with sodium oleate …
اقرأ أكثر
Fluorite Flotation Process,Fluorite Flotation Separation,
The present invention provides a method of producing low-cost production fluorite floating selection collectors collecting capacity, water-soluble, dispersible, suitable for room temperature and low flotation fluorite. Fluorite flotation adjusting agent composition A flotation of fluorite ore processing method, it is granted a patent ...
اقرأ أكثر