DOI: 10.1016/j.colsurfa.2021.127723 Corpus ID: 241852763; Flotation separation of apatite and calcite using gum arabic as a depressant @article{Zhong2021FlotationSO, title={Flotation separation of apatite and calcite using gum arabic as a depressant}, author={Chunhui Zhong and Bo Feng and Liangzhu Zhang and Wenpu Zhang and Hui …

In order to depress apatite and prevent its flotation, 300 g/t phosphoric acid was added and conditioned for 1 min. pH was adjusted to 5, 8, or 12 using sodium hydroxide or phosphoric acid solutions and conditioning for 1 min. Subsequently, 600 g/t collector was introduced in the flotation cell and conditioned for 3 min. Preliminary tests …

Beneficiation of low-grade phosphate deposits through direct froth flotation has captured more attention to satisfy the future needs of phosphorous industry. This is owing to the excessive consumption of the global reserves of high-grade phosphate deposits. Phosphate flotation using mixed collectors has been proved to give greater selectivity and high …

enologically related to flotation depression below pH 13.0. Fig. 7- Effect ofK2C03 addition on oleate flotation of calcite Apatite Flotation The pH dependence of apatite flotation at 2 X 10- 6 kmol/rnf potassium oleate is shown in Fig 8. The level of oleate in this case is almost two orders of magnitude lower

Given that particle and bubble size, as well as their surface properties, are pivotal in froth flotation, surfactants have been extensively employed due to their impact …

Based on the above investigations, flotation of artificial apatite-illite ore in seawater without and with the addition of ASS was conducted. Table 2 illustrated that without ASS addition the apatite recovery and grade was 56.8% and 19.2%, respectively. The presence of 30 g/t ASS slightly decreased apatite recovery and increased apatite …

The application of nanobubbles through flotation of coarse apatite tailings evidently improved the process' metallurgical responses compared to flotation by …

Froth flotation is a commonly utilized beneficiation technique for effectively separating apatite from other gangue minerals, such as calcite. It is difficult to achieve good separation with fatty acid collectors due to their similar interactions with apatite and calcite. In this work, sodium N-lauroyl sarcosinate (SNLS) was used as the collector for the …

K2CO3 and K3PO 4 to depress the flotation Inarkedly and Ca (NO3) 2 not to have a measurable influence. Evidently, the effects of supernatants of calcite and apatite on apatite flotation are due to carbonate and phosphate species respectively. DISCUSSION Flotation being the result of adsorption of collector on

NaOL adsorbed well on the desorbed surface of apatite and increased the apatite particle size from 27 μm to 229 μm, with a hydrophobic agglomeration effect, thus enhancing the flotation of ...

Fatty acid can interact with Ca 2+ ion on the apatite surface through its carboxylate group to form insoluble Ca 2+ -fatty acid compounds, contributing to the flotation behavior of apatite, which ...

Most apatite concentrates, essential for the fertilizer industry, are produced using froth flotation, where collectors play a pivotal role. Although vegetable oil-derived surfactants have been ...

In the micro-flotation experiments, pectin displayed an intense depressing effect in dolomite flotation and slightly affected apatite flotation. Quantum chemical calculation was used to predicated the reactive site of pectin, the results demonstrated that oxygen atoms of COO, OH and C O C in pectin display the most negative regions.

The selective depression mechanism of GA in the flotation separation of apatite from dolomite was investigated using various techniques, including zeta potential, contact angle, UV-vis, FTIR, XPS, ToF-SIMS, and AFM analyses. The results demonstrated that GA increased the hydrophilicity of the dolomite surface and impeded the adsorption of NaOL ...

The flotation performance (recovery and grade) of apatite particles in a Esfordi Phosphate Complex was investigated as a function of collectors' ratio and dosage, pH, depressant dosage, depressant ...

Fatty acids (e.g., sodium oleate) are the most widely used collectors in apatite and dolomite flotation; a small amount or more than 10 kg of phosphoric acid (H3PO4) was added as a depressant to ...

Highlights Conventional flotation devices can be inefficient to selectively recovery fine particles. The effect of process variables on the performance of dissolved …

The grain size of 37–74 μm after the fine particles removed by a strict water screen was used for adsorption test. Part of the sample was further ground to 5 μm for zeta potential tests. ... At pH = 8.0, NaCit has little depression effect on apatite flotation when the dosage was less than 400 mg/l. The recovery of apatite decreased ...

The flotation performance of apatite and dolomite was investigated to ensure the optimal pH value and NaOl concentration for apatite, the flotation results present in Fig. 3, as exhibited in Fig. 3 (a), in the presence of 1 × 10 −4 mol/L NaOl, the apatite flotation recovery rose with the increasing pH, and it remained nearly constant …

Beneficiation of the tailings from Iron Oxide Apatite (IOA) ore has become an important topic in the field of mineral processing as phosphate rock is …

The aim of this study was to investigate the influence of bubble size on the flotation performance of apatite of a low-grade phosphate ore for different particle sizes: …

Sulfation improved the flotation capacity of oleic acid for dolomite at pH 4.5. • The H 2 SO 4 sulfation added one SO 4 H group into the molecule of oleic acid.. Sulfating collector molecules and anions were adsorbed on the H 2 SO 4-treated dolomite surface.. The COO − and OSO 3 − groups of sulfating collector anion both reacted with the …

In this study, a new collector for apatite flotation was synthesized by a series of reactions, including sulfation and amidation, using sodium oleate as raw material. An investigation on flotation behavior and mechanism of oleic acid amide onto apatite was carried out by micro flotation tests, zeta potential measurements, and XPS analysis. ...

Flotation of apatite is complicated, owing to its physicochemical similarity with other minerals in phosphate ores. Despite this, relatively few studies have been done on the effect of operating ...

Fig. 1 shows the experimental setup of the apatite flotation and the close-ups of the column parts. The flotation column, which is made of plexiglass, is 1.68 m in height and 0.08 m in diameter. Since the objective of this work is to intensify the flotation of fine apatite particles, the scale-up task is not concerned and therefore this small column …

Combining the rheology, settling tests and FBRM measurements suggested a potential ASS dosage for flotation separation of apatite from illite, which was in accordance with the flotation results. Cryo-SEM observation further verified that face-to-face (F-F) aggregated and edge-to-face (E-F) flocculated association of illite was the …

However, apatite cannot be easily recovered from anhydrite-rich phosphate in the industrial practices, indicating that additional variables affect the flotation of apatite in anhydrite and apatite. As such, artificially mixed mineral tests were performed to further verify the effect of anhydrite on the flotation of apatite.

ABSTRACT. Apatite (Ca 10 (PO 4) 6 F 2) is the most important phosphate mineral, and flotation is the main beneficiation method to separate apatite from its major gangue mineral calcite (CaCO 3).Till date, fatty acids and their salts have been widely used as collectors in the apatite/calcite flotation separation due to their low cost and strong …

The effects of Ca²⁺, Mg²⁺, Al³⁺, and Fe³⁺ on the flotation behaviors of apatite, dolomite and quartz were investigated through a micro-flotation test, and the influence of calcium ions ...

This study synthesized a novel amine collector, 1-(dodecylamino)-2-propanol (DDAIP), by incorporating a 2-hydroxy propyl group into the molecular structure of dodecylamine (DDA). Flotation experiments showed that utilizing DDAIP collector resulted in a substantial difference of ∼80% in flotation recoveries between apatite and quartz.