A statistical analysis was performed to quantify the effects of pulp pH, wash water flow rate, circulating load flow rate, initial solid concentration, circulating load addition point …
Conventionally, froth flotation has been used to separate phosphate minerals from interfering gangue via their distinct properties [7], [8].Significant research on the flotation of apatite has been conducted, but most previous studies focused on the flotation of single gangue minerals, and rarely considered the flotation of apatite containing silicon and calcium …
The apatite ore was obtained from overflow product of Chaoyang phosphate mine. After air drying, mixing and dividing, the apatite ore was kept in self-sealing bags as the sample of flotation experiments. Chemical compositions of apatite ore were analyzed and the results were shown in Table 2. The results indicated that P 2O
4.. ConclusionsThe methodology used in this work for the flotation of apatite in a batch column produced the following conclusions: • The highest P 2 O 5 content corresponds to flotation with collector dosage of 74. g/ton, depressant dosage of 314 g/ton and air flow rate of 126 ; L/h.. The best conditions for P 2 O 5 recovery are collector dosage of 126. g/ton, …
In this work, a novel membrane distributor in a flotation column is developed to generate microbubbles for the flotation of fine apatite particles. A large number of …
Traditional reagents of apatite flotation are fatty acid collectors and their derivatives, but the poor selectivity is the prominent problem during the flotation separation process ... A review of recent substance flow analyses of phosphorus to identify priority management areas at different geographical scales. Resour. Conserv. Recycl., 83 ...
Apatite mole fractions of the end-members have been calculated, but with the following stipulation. If the F content of the apatite is 3.767, as is often the case with apatite from carbonatites, then the mole-fraction of FAp is assumed to be 1, with the remainder of the F thought to be present bound to the carbonate radical.
Quartz is commonly found alongside apatite as one of the main gangue minerals [10].Quartz differs from apatite in two key aspects: the absence of active sites, specifically referring to metal ions, on its surface and the higher electronegativity of its surface [11], [12], [13].Utilizing anionic collectors like fatty acids allows for the successful direct flotation …
Phosphate rock is the main raw material for manufacturing the phosphorous-based fertilizers and chemicals. Phosphate rock is primarily composed of the apatite group that contains variable percentage of P 2 O 5 in a calcium matrix with gangue minerals [1]. Most of phosphate rock minerals are of low P 2 O 5 grade in nature, which demands some beneficiation …
One of the key problems to be solved urgently in the reverse flotation of phosphate ore is the effective depression of apatite. However, research on the influence mechanism of acid depressants on the surface …
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 most common method to concentrate apatite from carbonate phosphate ore is reverse configuration using fatty acids as collectors and inorganic acids as apatite depressants, such as H 2 SO 4 and H 3 PO 4.This work evaluates the process based on the separation between apatite and calcite by flotation, in bench and pilot scale, using carbon dioxide …
Phosphate ore can be divided into siliceous type, calcareous type, and siliceous (calcium)-calcium (silicon) type. Flotation is the most important beneficiation method for apatite. According to the different properties of phosphate ore, Zhengkuang Machinery designs the following process flows: flotation + magnetic separation combined flow, grinding + classification + flotation flow, …
Kinetic test of apatite flotation showed a direct relation between the bubble size and the P 2 O 5 grade. Abstract. ... When the air flow rate and the flow rate of surfactant solution were adjusted according to the conditions of each test, the recirculation was turned on, so bubbles were captured and recorded by the high-resolution digital ...
The best results in apatite flotation, i.e., the highest index of flotation response (3.58), were achieved in test F4. In this test, an anionic surfactant (Lupromin) was employed …
Combinations of two different types of collectors, reagent dosages, air flow rate, recycle flow rate and conditioning times are analyzed from experiments carried out in a flotation column to evaluate their effects on the grade and recovery of apatite in the concentrate.
The air flow used for the tests was 40 cm3s-1 and a pressure of 10 psi, which provides less hydraulic drag. 1 g of apatite mineral was used in the granulometry of -100 + 150 #. The characterization of the starches and the sample of the apatite mineral were made by scanning electron microscopy SEM, EDS, fluorescence and X-ray diffraction, as ...
Column flotation has been successfully used in apatite concentration due to its better performance than conventional cells, producing froth with better flow characteristics. The gangue entrainment in the froth is decreased and the bubble residence time in the pulp increased, resulting in a better selectivity [4].
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: fine …
In cases where the contents of quartz in phosphate ores are excessively high, the direct flotation process for these phosphate ores using anionic collectors leads to the inclusions of fine-grained quartz particles in flotation concentrates, carried by the air bubbles within slurry, ultimately causing the reductions in the grades of apatite within the concentrates.
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 on bubble size and froth stabilization. This study aimed to investigate the influence of surfactants on the performance of apatite flotation in column. Three different categories of surfactants were …
The flotation performance of dolomite and apatite in... In this work, GJBW, a fatty acid-based agent, was used as an efficient collector to separate dolomite from apatite to …
Combinations of two different types of collectors, reagent dosages, air flow rate, recycle flow rate and conditioning times are analyzed from experiments carried out in a flotation column to evaluate their effects on the grade and recovery of apatite in the concentrate. ... Selective flotation of apatite from calcite using 2-phosphonobutane-1,2 ...
This study investigated the influence and mechanisms of anhydrite on apatite flotation through single mineral flotation tests, artificial mixed ore flotation tests, flotation …
Over the last few decades, conventional fatty acid collectors have consistently demonstrated a high affinity for calcium-rich minerals such as apatite, calcite, and dolomite, making them commonly employed in apatite flotation processes [15], [16].However, the industrial utilization of fatty acid collectors is constrained by their limited selectivity and inadequate solubility under …
An Example of flotation cell capacity and circuit retention time approximation: Estimate the volume of conditioners and flotation cells required to handle 9100 dry tons of ore per 24 hours at 30% pulp solids by weight, with an …
In apatite flotation, the need for highly selective collectors leads to the development of a novel amphoteric collector, N-dodecyl-β-alanine (DDALA), derived from dodecylamine (DDA). Flotation experimental outcomes reveal that, when employed alongside xanthan gum (XG) as a depressant, DDALA collector effectively facilitates the reverse ...
Recovery of apatite from flotation tailings. Michelly dos Santos Oliveira. 2011, Separation and Purification Technology. See full PDF download Download PDF. Related papers. Alternative Reagents in Phosphate Ore Flotation. Michelly dos Santos Oliveira. Journal of …
6. 26.3 Flotation beneficiation of different phosphate ore types 3 been found that flotation behavior of these two minerals using either anionic or - ionic collector is virtually the same. A number of researchers [1,2] have developed methods for beneficiation of cal- careous phosphate ores using the fatty acid method.
Due to the flexibility of Units and especially the "Sub-A" Flotation Machine, gravity flow can be utilized throughout the mill, thus keeping pumping requirements to a minimum. ... Flotation is carried out in a neutral circuit …
The effect of the surfactant under various pH on the single minerals flotation (Pulp density: 10%, fatty acid dosage: 200 mg/dm 3, surfactant dosage: 15 mg/dm 3, temperature: 25°C, flotation ...
The effects of the key variables on the selective flotation of Mt. Weld phosphate ore were studied with the aim of optimizing the flotation process to yield a concentrate of the following specifications: >36% P 2 O 5, <3% Fe 2 O 3, P 2 O 5 (Fe 2 O 3 + Al 2 O 3) >10 at a P 2 O 5 recovery of >70%. The main difficulty was to reduce the iron content in the apatite …
The flotation performance of minerals is directly related to their hydrophobicity, hence the surface hydrophobicity of mineral is monitored by contact angle, ... In addition, the liquid flow rate was investigated by monitoring the mean square displacement (MSD) of H 2 O molecules in interface [46]. The smaller slope of the fitted MSD ...