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The effects of apatite and calcite supernatants on calcite flotation is to depress the flotation markedly in the neutral to alkaline pH (pH < 13) range.
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Polyepoxysuccinic acid, was successfully applied as a selective depressant of calcite in calcite/apatite flotation in the presence of sodium oleate collector (Dong et al., 2021).
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Phosphoric acid (H 3 PO 4) and sulfuric acid(H 2 SO 4) have been proved to be effective inhibitors for the reverse flotation of calcareous phosphate ore under acidic conditions (pH < 5.5).Reports show that the inhibition of apatite by H 3 PO 4 under acidic conditions is possibly due to the formation (or adsorption) of aqueous CaHPO 4 (or CaH 2 PO 4 + in more …
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In order to selectively separate smithsonite and calcite using potassium lauryl phosphate as collector and reveal the depression mechanism, the approaches of micro-flotation and zeta potential ...
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However, there are few studies related to depressants of gangue mineral calcite during apatite flotation. 2-Phosphonobutane-1,2,4-tricarboxylic acid (PBTCA) has also been studied as a calcite depressant in apatite flotation (Liu et al., 2019a), but the phosphate group of PBTCA will cause eutrophication of water bodies, and therefore will cause ...
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The PS was then evaluated for its ability to depress apatite, enhancing the separation efficiency of apatite from calcite in phosphate rock beneficiation via reverse flotation. Micro-flotation experiments revealed PS's distinct depression effect on apatite while minimally impacting calcite.
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In this study, potassium oleate and potassium dihydrogen phosphate (KH2PO4) were used as collector and depressant, respectively. Micro-flotation experiments were …
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Calcite flotation in acidic media is a difficult task due to the solubility of calcite and consequently the release of calcium ions in the flotation pulp. In addition, the interaction of calcium ions with the flotation reagents requires the correct selection of these reagents. In this study, potassium oleate and potassium dihydrogen phosphate (KH2PO4) were used as collector and …
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Bench-scale flotation experiments were used to verify the efficiency of industrial application of polyepoxysuccinic acid in the flotation phosphate ores. Depression mechanism of polyepoxysuccinic ...
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The obtained flotation results demonstrated the successful depression of calcite by all three reagents, with DTPMPA exhibiting the most pronounced depressing effect. Moreover, density functional theory (DFT) analysis revealed that DTPMPA possessed superior depressant capabilities on the calcite surface compared to the other two novel depressants.
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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 …
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In this study, GLDA was employed as a depressant in the flotation separation of magnesite and calcite. The effects of GLDA on the flotation behavior of these minerals were …
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The PS was then evaluated for its ability to depress apatite, enhancing the separation efficiency of apatite from calcite in phosphate rock beneficiation via reverse …
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Apatite, a group of phosphate minerals, widely used in medicine, environmental protection materials, national defense, ... Carboxymethyl chitosan exhibited selective depression for calcite flotation. The apatite and calcite with recovery of 87.8% and 10.1%, respectively, was obtained with NaOL as collector and carboxymethyl chitosan as ...
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In general, precipitated calcium carbonate (PCC) is used as a mineral filler in paper industries; while natural calcite (CaCO3) ore is also suitable for industrial use if it is a finely ground high-grade material. Naturally, calcite is …
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most important phosphate mineral and flotation serves as the primary method for separating it from its predominant gangue ... exhibited the selectivity for calcite depression in binary ... to 10% at a concentration of 10 mg/L [32]. El-Mofty et al. (2015) conducted a study on calcite flotation in which recovery was achieved using 5×10-5 M ...
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In this study, the selectively depression effect of sodium polyacrylate (PAAS) on the flotation separation of apatite from calcite was studied.
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The main depressants for separating smithsonite and calcite by flotation are inorganic and organic depressants. Inorganic depressants mainly include sodium silicate (Na 2 SiO 3) and sodium hexametaphosphate ((NaPO 3) 6) (Changgen, 1983, Liao et al., 2022).Currently, sodium silicate is the most commonly used inorganic depressant in the industry.
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As semi soluble salts minerals (included in non-sulphide ores), phosphate rock is the principal natural resource exploited in the mining industry for the extraction of phosphorus [4, 6].It is predominantly composed of apatite, which constitutes the valuable fraction, as well as carbonates (calcite, dolomite), silicates (clays and quartz) and other minerals, which are …
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Calcite flotation from a carbonate phosphate ore by CO 2 as the apatite depressant has also been reported . The results demonstrated that the injection of CO 2 could …
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The flotation of calcite alone or from phosphate slimes using potassium oleate as a collector and in the presence of potassium dihydrogen phosphate (KH 2 PO 4) as a phosphate …
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Nonetheless, the efficient flotation of carbonate-rich phosphate ores is daunting and beneficiation frailties are usually expected, if not encountered (Yang et al., 2021a).Challenges mainly arise from the altered crystalline structure of apatite, characterized with a highly CO 3 2− substituted lattice. Complications might also steam from the presence of multiple gangue …
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Accordingly, flaxseed's soap, served as an efficient calcite collector in phosphate flotation while including phosphoric acid for apatite depression. It enabled the recovery of up to 95.7% ...
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The objective of this study was to examine the selective depression mechanism of gypsum in the flotation separation of apatite from calcite. The flotation behavior of apatite and calcite before and after the addition of gypsum and the effective components of gypsum in solution were investigated via micro-flotation experiments.
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Additionally, calcareous phosphate ore is an important natural resource of phosphorus, in which apatite is the major phosphate mineral, while calcite and dolomite are the main gangue minerals [3], [4]. Reverse flotation is a common method for the separation of apatite from calcareous phosphate ore [5], [6], [7]. Since the surface properties of ...
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Oleate adsorption isotherms determined for calcite at 20 °C and 60 °C and at pH 9.2 by in situ FT-NIR/IRS with overtone and combination bands of the aliphatic stretch from Young and Miller (2007 ...
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Depression mechanism of acid for flotation separation of fluorapatite and dolomite using ToF-SIMS and XPS ... Selective flotation of brucite from calcite using HEDP-4Na as an inhibitor in a SDS system. ... reverse flotation dolomite from phosphate ores is used in many plants while sulfuric/phosphoric acid were used as depressants for apatite ...
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The way to successfully upgrade a phosphate ore is based on the full understanding of its mineralogy, minerals surface properties, minerals distribution and liberation. The conception of a treatment process consists of choosing the proper operations with an adequate succession depending on the ore properties. Usually, froth flotation takes place in …
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calcite have been studied through micro-flotation. The single mineral flotation tests show that LSC can depress calcite, but it has little effect on flotation. Flotation separation of a mixture of smithsonite smithsonite and calcite can be completed to obtain a zinc concentrate grade up to 33.85% Zn with a recovery of 70.06%.
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However, admittedly, the efficient depression of calcite remains a difficult subject in phosphate flotation process. Gum arabic (GA) is a kind of natural gum produced in the semi-desert region of Sub-Saharan Africa, which has a complex chemical structure of branched chains of (1−3)-linked D-galactopyranosyl containing L-arabinofuranosyl, L ...
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