To research the effect of NBs on the flotation process of this phosphate ore, two flotation tests with and without NBs were compared. The results show that the MgO removal had an increment of 10% in the case of NBs flotation versus conventional flotation in the approximate grade and recovery of P2O5.
significantly enhance the flotation efficiency of fine particles of minerals. To research the effect of NBs on the flotation process of this phosphate ore, two flotation tests with and without NBs were compared. The results show that the MgO removal had an increment of 10% in the case of NBs flotation versus
It was found that optimal initial pH for phosphate removal was 5.00 in the MgO/KBC system. The dosage of adsorbent was also an important factor for phosphate removal. The dosages of MgO/KBC were considered at an initial pH of 5.00 (Fig. 2 d), and ca. 40.02% phosphate was adsorbed when adding 0.50 g L −1 of MgO/KBC. …
Under the optimum flotation conditions, 0.04% cellulase and 0.5 mM oleic acid, a phosphate concentrate containing 0.89% MgO with a P2O5 recovery of 75% was obtained from the phosphate ore ...
@article{Liu2019RemovalOP, title={Removal of phosphate from aqueous solution using MgO-modified magnetic biochar derived from anaerobic digestion residue.}, author={Jiwei Liu and Jianguo Jiang and Aikelaimu Aihemaiti and Yuan Meng and Meng Yang and Yiwen Xu and Yuchen Gao and Quan Zou and Xuejing Chen}, journal={Journal of …
A chemical process was tested to leach unwanted magnesium from dolomitic phosphate ore with sulfuric acid under automated pH control. Product carbon dioxide is removed by slurry spray in air or by … Expand
In this study, Mg-modified sludge biochar () and Mg-Fe double oxides/sludge biochar composites (MFB) were synthesized for enhanced removal of phosphate from aqueous solution. The phosphate adsorption followed the Langmuir-Freundlich isotherm model, and the maximum capacity was 142.31 mg P/g and 35.41 mg …
Enhanced removal of Mn 2+ and NH 4 +-N in electrolytic manganese metal residue using washing and electrolytic oxidation. Author links open overlay panel Jiancheng Shu a, ... (MgO) and phosphate (Na 3 PO 4, Na 2 HPO 4, NH 4 H 2 PO 4, NH 4 H 2 PO 4 and Ca 10 (PO 4) 6 (OH) 2) [2], [3], [27], [28] can be used for Mn 2+ and NH 4 …
The effect of pyrolysis temperature on phosphate removal is presented in Fig. 1 (b). It could be seen from Fig. 1 (b) that MgO@MBC obtained at 600 °C had the highest adsorption capacity for phosphate while MgO@MBC pyrolyzed at 500 °C had lower adsorption capacity for phosphate due to the lack of carbonization and the lower …
REMOVAL OF MgO FROM PHOSPHATE PEBBLE BY FLOTATION: PHASE II . FINAL REPORT . Hassan El-Shall and Regis Stana . Principal Investigators . …
Table 16. Comparison Between Coating the Particles Before Adding Them to a 3.0% Acidic Solution and Adding the Particles to a 3.0% Acid+ 0.12% PVA Solution Without Coating. …
Phosphogypsum. Phosphorus ore flotation tailings. Phosphate removal. Adsorption. 1. Introduction. Phosphorus fertilizer, yellow phosphorus and feed-grade …
A phosphate concentrate containing 0.5% MgO and 32.2% P2O5 was obtained from a mixture of natural pure phosphate and dolomite minerals containing 10.2% MgO and 24.1% P2O5 at a recovery of 88% when ...
develop a new process for the removal of MgO from phosphate pebble without grinding the pebble. The new methodology separates the dolomite from phosphate pebble by flotation through the use of a surfactant to capture the gas generated by the …
Nano-MgO biochar composites (nMBCs) have been considered as potential adsorbents for phosphate removal from aqueous solution. It is an effective strategy to improve P removal efficiency that adjustment of the size, distribution and crystallinity of MgO particles embedded into the carbon matrix. Herein, we prepared a highly efficient …
The low concentrations of Mn 2+ and NH 4 +-N in electrolytic manganese residue leachate (EMRL) have seriously hindered the development of the electrolytic manganese industry.In this study, an electrochemical process combined with H 2 C 2 O 4-modified phosphate ore flotation tailings (MPOFTs) for the synergistic removal of Mn …
And the nano-MgO of MgO-biochar synthesized for phosphate and nitrate removal had a grain size of 19 nm (Zhang et al., 2012). Therefore, the growth of the MgO crystal grains were limited by the carbon matrix effectively. Download : Download high-res image (676KB) Download : Download full-size image; Fig. 4.
MgO removal from phosphate pebble by flotation: Final report [El-Shall, Hassan] on Amazon. *FREE* shipping on qualifying offers. MgO removal from phosphate pebble by flotation: Final report
Flotation tests for a collophane sample subjected to the first reverse flotation for magnesium removal demonstrates that a rough flotation process (using a 0.4 kg·t−1 new collector at pH = 6 ...
mgo removal from phosphate pebble by flotation final @inproceedings{ElShall2003MgORF, title={MgO REMOVAL FROM PHOSPHATE …
separating dolomite from phosphate rock by reactive flotation: fundamentals and application by ayman a. el-midany a dissertation presented to the graduate school
@article{Deng2021AGM, title={A green method for Mn2+ and NH4+-N removal in electrolytic manganese residue leachate by electric field and phosphorus ore flotation tailings}, author={Yaling Deng and Jiancheng Shu and Tianyan Lei and Xiangfei Zeng and Bing Li and Mengjun Chen}, journal={Separation and Purification Technology}, …
Beneficiation Techniques for Phosphate Ores. 2.1. Flotation. Due to the high efficiency in the removal of silicate and carbonate gangue minerals, froth flotation is dominantly employed for the beneficiation of phosphate ore, especially for low-grade sedimentary phosphate rocks.
Usually, froth flotation takes place in phosphate enrichment processes, since it is cheap, convenient, and well developed. Nevertheless, it is a complex technique as it depends on the mineral's …
A chemical process was tested to leach unwanted magnesium from dolomitic phosphate ore with sulfuric acid under automated pH control. Product carbon dioxide is removed …
In addition, flotation tests and X-ray fluorescence show that the required quality of phosphate concentrate was obtained at 31.05% P 2 O 5 with a recovery of 98.21% at pH 5.
Removal of phosphate impurities is a prerequisite for using phosphate ores in different applications. The flotation process is one of the most promising processes that have been used to improve the phosphate grade. However, the flotation performance depends on the type of the associated impurities to valuable minerals due to their different flotation …
High magnesium adversely affects both the production of phosphoric acid (lowers phosphate recovery or production rate) and acts as a diluent in the final fertilizer products. Therefore, this study was initiated to investigate a novel reactive flotation (RF) technology to separate dolomite from dolomitic phosphate ores.
Metal oxides such as MgO and CaO are highly preferred for being modified and used as adsorbents for the phosphate removal [9, 10]. Calcium oxide and magnesium oxide could be used to improve the adsorption property of the materials through changing the functional groups, which can significantly improve the adsorption capacity of …
In the conventional phosphate flotation (Crago) process, 30–40% by weight of the silica present in the feed are floated twice, first by fatty acid, and then by amine. ... MgO removal from ...
As a result, P (AA-AMPS) could accomplish the effective removal of dolomite from phosphate ore, as demonstrated by the high-quality apatite concentrate that was produced, which had a P 2 O 5 grade of 38.53% and a MgO grade of 0.85%. Thus, P (AA-AMPS) can be considered as an eco-friendly and efficient depressant in the effective …
This demonstrates that magnesium removal from phosphate ore has the characteristics of a micro-fine particle flotation problem. Under conditions of cyclonic circulation the MgO level of the concentrate is 1.74%, which is lower than that obtained from the column operated in direct-flow circulation by 0.34%.
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 …
P 2 O 5 and 0.8% MgO, with a 92% P 2 O 5 recovery from a feed containing 26.7% P 2 O 5 and 2.2% MgO. In the flotation of phosphate ores, fatty acids and their salts are commonly used as collectors ...
In Fig. 2, the concentrations of Mn 2+ and NH 4 +-N were 96.71 mg/L and 376.53 mg/L, respectively, when the initial pH of EMMRW was 9.5 and the reaction time was 2 h at 20 °C.The concentration of Mn 2+ was almost completely removed, and the concentration of NH 4 +-N decreased to 251.29 mg/L, as well as the pH of EMMRW …
The application of sodium phytate significantly improved the flotation performance and for MgO control in flotation of Yanbian ore. The source of sodium phytate is very extensive, and there are numerous phosphate groups (the P O functional group) in the molecule, which can easily ionize (anion) in the aqueous
The calcareous and/or dolomitic-siliceous phosphate ores of South Florida and Utah required two flotation stages: one for carbonate removal, as mentioned above, and the other for phosphate recovery from siliceous gangue. Preliminary tests on the South Florida ore gave concentrates analyzing 29% P 2 O 5 and 0.8% MgO, with a P 2 O 5 recovery of …
Separating dolomite from phosphate rock by reactive flotation: fundamentals and application
The phosphate flotation stage produced concentrates analyzing about 31% P2O5, 0.7% MgO, and 4% insol. The overall P2O5 recovery in the two stages was about 85%. Read more
The southern Florida phosphate deposits that will be mined in the future contain significant amounts of dolomite. Because high MgO levels are undesirable in phosphoric acid production, several flotation schemes for the removal of the dolomite have been attempted. Alternatively, selective flocculation has been suggested as a potential …