The surface precipitation of calcium silicate or phosphate on fluorite and calcite was identified as a major depression mechanism. Selective depressing conditions for different …
Flotation tests were performed on a skarn ore to attain the selective separation of scheelite (CaWO 4 ) from fluorite, apatite, and silicates. Fluorite and apatite constitute common gangue ...
Phosphate derivatives such as sodium hexametaphosphate [(NaPO 3) 6], sodium phosphate (Na 3 PO 4), sodium pyrophosphate (Na 4 P 2 O 7), and 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP) (Wang et al., 2018b) are also widely used inorganic depressants for scheelite flotation from calcite and fluorite (Yongxin and Changgen, 1983; Bel'kova et al ...
Micro-flotation results showed that sodium dodecyl sulfonate (SDS) had an extremely good collecting capability for fluorite and barite, while PBTCA selectively depressed …
Flotation experiments were conducted to investigate the effect of sodium silicate on the flotation of scheelite and fluorite at varying temperatures and dosages of sodium silicate. Flotation tests involving single minerals and artificially mixed minerals were carried out using sodium oleate at a concentration of 25 mg L –1.
Sodium hydroxide, sodium carbonate and sulfuric acid are commonly used as pH regulators in flotation separation of fluorite and calcite [83,100].The flotation behavior of fluorite at a high pH ...
The gangue minerals need to be removed during the flotation of fluorite. During the flotation slurry, many ions dissolve from the mineral surface and undergo many reactions, so the calcium-containing minerals have the similar physical and chemical properties and the separation of fluorite and calcite has always been a challenge [11], [12], [13 ...
Froth flotation is a selective process that is used to carry out specific separations of complex minerals, based on the di erent surface properties of each of them. It stands out in fluorite …
Flotation tests were performed on a skarn ore to attain the selective separation of scheelite (CaWO 4 ) from fluorite, apatite, and silicates.
Micro-flotation results indicated that the addition of P (AA-AMPS) could achieve the efficient separation of apatite from dolomite at pH 8.5 by selectively depressing the dolomite flotation, in ...
Phytic acid (PA) (C 6 H 6 (H 2 PO 4) 6), known as inositol hexakisphosphate (IP6), is a natural and substance extracted from cereal grains and seeds and has been widely used as cleansing and water treatment agent as well as food and cosmetic additives.It has been proven to be non-toxic to humans and "green" to the environment [28,29]. The most attractive …
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 photoelectron spectroscopy (XPS) analyses and density …
In this work, dextrin, an effective and eco-friendly organic compound, was used to separate fluorite from calcite.The depression performance and adsorption mechanism of it on the calcite surface were investigated by flotation experiments, contact angle measurements, Fourier transform infrared spectroscopy (FTIR) measurements, and X-ray photoelectron spectroscopy …
A tech-economic assessment based on the pilot program showed that compared with sodium silicate, the new technology (dextrin + tannin) improved fluorite recovery by 19.23%, removal rate of CaCO 3 by 13.43% and SiO 2 by 8.93% and reduced production costs by $2914.8 per day. The technology (dextrin + tannin) produced an excellent result, simplifying the flow …
The flotation of artificial mixed fluorite/calcite confirmed that TE had the efficient and selective depressing ability to achieve effective separation performance. The adsorption measurements showed that the adsorption amount of TE on the calcite surface was much higher than that on the fluorite surface. ... the effect of pH on the fluorite ...
If calcite can be removed from fluorite ore in advance via a reverse flotation method, i.e. depressing fluorite and floating calcite, SS may be used in smaller amounts or even abandoned. The fluorite is then further activated and recollected. Meanwhile, the pre-removal calcite can be further enriched and then applied in many industries without ...
In order to strengthen the separation of fluorite from calcite, many effort have been done in the developing of new depressants. Jia Tian [11] used the mixture of Al 2 (SO 4) 3 and acidified water glass as depressant and NaOL as collector to separate fluorite from calcite and celestite. The mixed depressant showed better depression behavior and increased the grade …
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 ...
It has been shown that carrying out flotation of fluorite at pH higher than 9.5 leads to a greater flotation of carbonates, even when using different types of depressants. The effect of pH on the flotation of fluorite with QT has …
Quantitative study on the selective depressing effect of polysaccharides on some polar minerals. Author links open overlay panel Jizhen Wang, ... (Fe 2 O 3) > Aptite(Ca 5 [PO 4] 3 (F,OH)); Bastnaesite(Ce ... Fluorite flotation separation from bastnaesite via an eco-friendly polymer as a depressant and insight into its mechanism of adsorption.
Floatation test results showed that the flotation difference between fluorite and calcite was expanded by curdlan, thus enabling the flotation separation of fluorite/calcite. The selective …
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 ...
It has been shown that carrying out flotation of fluorite at pH higher than 9.5 leads to a greater flotation of carbonates, even when using different types of depressants. The effect of pH on the flotation of fluorite with QT has been studied quite thoroughly. In practical applications, the pH ranges from 8 to 9.5.
During bulk flotation, oleic acid is generally used as a collector, and sodium silicate is used as a depressant to inhibit other gangue minerals. Two main approaches can be adopted to separate the mixed fluorite-barite concentrate: depressing barite to float fluorite, or depressing fluorite to float barite.
Fluorite is an important strategic resource with the formula of CaF 2 which has been used in the field of fluorine chemical industry, optical lens, cosolvent in the smelting process as well as ceramics due to its special physicochemical properties [1], [2], [3].With the rapid depletion of high-quality fluorite ores, the exploitation of low-grade resources is becoming …
Froth flotation has become the dominant technique for separating cassiterite and fluorite. However, due to the limited selectivity of conventional collectors, fluorite was always collected with ...
Flotation experiments demonstrate that employing THODA as a collector can yield a fluorite recovery of approximately 90%, while the recovery rate of calcite ranges between 10% and 20%. THODA exhibits a superior selectivity in the flotation separation of fluorite and calcite compared to oleic acid.
The floatability of fluorite and calcite as a function of NaOl dosage at pH 8.0 is shown in Fig. 4.As seen in Fig. 4, flotation recoveries of fluorite and calcite significantly increased with increasing dosage of NaOl and remained constant at high collector concentration.The flotation recovery of both fluorite and calcite was over 90 % using 1.5 × 10 −4 mol/L NaOl, …
Fluorite (CaF 2), which is a major source of fluorine (Gao et al., 2016), has been widely used in metallurgy, chemistry, ceramics, optics, and other industries closely related to the development of the national economy (Li et al., 2022, Liu et al., 2019, Li and Gao, 2018).Fluorite resources are abundant on earth, but with the continuous development of industry, high-grade, …
1. Introduction. Scheelite (CaWO 4) is an important mineral for extracting tungsten and usually associated with fluorite in Chinese scheelite deposits. 1,2 The utilization of refractory scheelite deposits—wolframite resources that can be easily separated via the gravity method and are almost depleted—has become important. Conventional flotation practice for separating …
Fluorite (CaF 2) is an important mineral resource with a wide range of applications in metallurgy [1], chemical industry, construction materials and other related fields [2], [3], [4].It is also the principal natural mineral from which fluorine (F) is extracted [5], [6].The unique chemical structure of fluorine atoms makes fluorite a crucial chemical material in modern industry [7].
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).