Processing options for removal of silica and alumina from …
Global demand for iron and steel has increased substantially over the past 20 years and there has been a greater focus on developing suitable processing options to treat low-grade hematite-goethite ores containing higher levels of silica and alumina impurities. The processing applicable to reduce the impurity levels in these lower-grade iron ores …
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Removal of phosphorous through roasting of oolitic iron …
The present study is devoted to improvement of the leaching efficiency during phosphorous removal from high phosphorous gravity-magnetic concentrate. Before leaching the concentrate has been subjected to roasting with the addition of either Ca(OH)2 or CaO. The oolitic iron ore is roasted at 900°C for one hour. This reflects in …
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Floatability studies of wavellite and preliminary results on phosphorus …
Semantic Scholar extracted view of "Floatability studies of wavellite and preliminary results on phosphorus removal from a Brazilian iron ore by froth flotation" by A. Nunes et al. ... Demand for high-quality iron concentrate is significantly increasing around the world.
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New insights into the microbial-driven metal reductive …
The extraction of phosphorus (P) from iron-rich sludge is a critical step for P recovery process. The acidogenic phosphorus release (APR) process was proved as a cost-effective and environmental-friendly method to separate and release Fe–P from iron-rich sludge, including primary sludge and activated sludge.
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Processes | Free Full-Text | Increasing Iron and Reducing Phosphorus …
High-phosphorus oolitic iron ore, treated by suspended flash magnetic roasting, contained 42.73% iron (mainly present as magnetite) and 0.93% phosphorus (present as collophane). Low-intensity magnetic separation (LIMS) was combined with reverse flotation to increase the iron and reduce the phosphorus contents of the …
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The removal of alumina and silica from iron rejects slime by chemical
These DFT findings were validated by experimental flocculation results which show that a final concentrate of 64.4% Fe, 4.2% Al 2 O 3, and 1.9% Silica with a yield of 56% can be ... phosphorus, and sulfur. Often, a chemical separation is the only method able to remove phosphorus from iron ores. Phosphorus can occur as phosphorus …
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Phosphorous removal and recovery from urban wastewater: …
Phosphate removal can be also obtained by iron oxides from mineral processing industry (Ajmal et al., 2018) or by calcium meta-silicate minerals (Obradović et al., 2017). Ligand exchange and surface precipitation are the predominant sorption mechanisms with removal capacities depending on the by-product composition, size, …
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Phosphonate removal from membrane concentrate by …
Phosphorus can be removed via the formation of an insoluble compound containing phosphate and iron, such as FePO4; however, it was necessary to determine the conditions under which phosphorus can ...
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Carbon and Phosphorus Removal from Primary Municipal …
While with fresh alum, the removal efficiencies of total suspended solids, chemical oxygen demand, total phosphorus, and total nitrogen were 85%, 65%, 80% and 33%, respectively, a drop in removal efficiency of total suspended solids and chemical oxygen demand was observed for recovered aluminum (85–60% and 65–50%, respectively).
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Separation of Iron and Phosphorus from High-Phosphorus …
The optimal experimental conditions for achieving a high iron recovery and removal ratio of phosphorus were a temperature of 1200 °C, reduction time of 120 min, and C/O ratio of 1.2. Under these conditions, the iron recovery and removal ratio of phosphorus of the magnetic products reached 95.28% and 70.02%, respectively.
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Removal of phosphorus from iron ores by chemical …
After leaching for 60 min, the phosphorus extraction almost keeps unchanged. It can be seen that sulfuric acid is the most efficient to remove the phosphorus from the ore. 91.61% phosphorus was extracted after leaching for 20 min with sulfuric acid. And the best result obtained was 93.31% at the time of 60 min.
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Removal of Silicon, Aluminum and Phosphorus …
Iron Ore by Reverse Froth Flotation and Alkaline Roasting Int. J. Soc. Mater. Eng. Resour. Vol.25, , (Apr. 2022) physical approaches [11-13]. Among these methods, chemical leaching with sulfuric acid, hydrochloric acid, nitric acid, and alkyl solution can adequately remove phosphorus from iron ores in which phosphorus presents in phosphate ...
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Elimination of amino trimethylene phosphonic acid (ATMP …
However, phosphonate antiscalants in RO concentrate might aggravate phosphorus pollution, remobilize heavy metals, a … Elimination of amino trimethylene phosphonic acid (ATMP) antiscalant in reverse osmosis concentrate using ozone: Anti-precipitation property changes and phosphorus removal
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Roasting-induced phase change and its influence on phosphorus removal
In the present study, roasting-induced phase change and its influence on phosphorus removal via leaching has been investigated for high-phosphorus iron ore. The findings indicate that phosphorus in the ore is associated with goethite and exists mainly in amorphous Fe3PO7 phase. The phosphorus remains in the amorphous …
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Phosphorus Removal from Wastewater by …
Phosphorus removal from wastewater is very important in order to prevent water eutrophication. Although there are many ways to remove phosphorus, electrocoagulation (EC) is a promising method. However, the efficiency of conventional EC processes needs to be further improved. In this study, magnetized iron particle anodes used for EC were …
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Metals | Free Full-Text | Tin Removal from Tin-Bearing Iron Concentrate
The tin could be volatilized and removed effectively from the tin-bearing iron concentrate while roasted in an atmosphere of SO2 and CO. The reduction of SO2 by CO occurred in preference to the SnO2 and Fe3O4, and the generated S2 could sulfurize the SnO2 to an evaporable SnS, which resulted in the tin volatilization. However, the Fe3O4 …
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Mechanism of phosphorus removal in beneficiation of high phosphorous …
Phosphorus removal of high phosphorus iron ore by gas-based reduction and melt separation [J] Journal of Iron and Steel Research (2010) ... Iron concentrate with an iron grade of 58.72% and iron recovery of 89.32% was obtained via microwave pretreatment at 1050 °C for 2 min, followed by magnetization roasting at 650 °C for 5 …
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Amenability for processing of oolitic iron ore concentrate …
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Dephosphorization of unroasted oolitic ores through
The present study of phosphorus removal from an unroasted iron ore via alkaline leaching method examined the possibility of dephosphorization from goethite ore at low temperature. The iron ore concentrate used in this study is an oolitic type of iron ore consisting primarily of goethite, in which phosphorus does not form a discrete mineral ...
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Phosphorus removal and recovery from wastewater via …
phosphorus are the nano iron oxides, but without a host media, i.e., the ion exchange resin, these nanoparticles would wash away and potentially toxify the environment 18 .
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Effective removal of phosphate from aqueous solution …
The removal of phosphate was found higher at acidic and neutral pH compared to basic conditions. The nanoparticles exhibit good selectivity and adsorption efficiency for phosphate in presence of co-existing ions such as Cl −, SO 4 2− and NO 3 − with some inhibition effect by CO 3 2− .
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A review on the characterisation and processing of oolitic iron …
This gave a concentrate containing about 46% Fe of which about 30% was. ... Improvement of phosphorus removal from iron ore using combined microwave pretreatment and ultrasonic treatment. Separation and Purification Technology, Volume 156, Part 2, 2015, pp. 724-737.
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Processing of a rare earth phosphate concentrate obtained …
The results also show that a solution containing 40 g/L REE; free of phosphorous, calcium and iron can be obtained after reprecipitation of the rare earth phosphate concentrate as sodium rare earth double sulphates followed by alkaline conversion with sodium hydroxide and dissolution in nitric acid.
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(PDF) Determination of optimum conditions to remove
Gol-E-Gohar iron complex is located 50km southwest of Sirjan City, Iran. Its concentrate contains sulfur and phosphor with grades of 0.5%S and 0.08%P which are higher than the steel industrial ...
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Electrocoagulation as a green technology for phosphate removal from
The results showed that 99% of phosphate was removed within 60 min of electrolysis at an initial pH (ipH) of 6, inter-electrode distance (ID) of 0.5 cm, current density (J) of 6 mA/cm 2, initial concentration of phosphate (IC) of 100 mg/L, and minimum operating cost of 0.503 US $/m 3. The electrochemical cell produced enough H 2 gas to …
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Adsorption and mechanism study for phosphonate antiscalant HEDP removal
In addition, the concentrate can be treated to remove problematic precipitates, and most of the concentrate can be returned to the RO system for further desalination, which can reduce the volume of RO concentrate and increase the recovery of RO system. ... Removal of phosphate using iron oxide nanoparticles synthesized by …
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Separation and recovery of metallic zinc and iron concentrate …
The removal rate of metallic Zn reached ≥ 99.6%. (2) Experimental studies showed that the phase transformations of iron and zinc during the reduction process were ZnFe 2 O 4 →Fe 2 O 3 →Fe 3 O 4 →FeO and ZnFe 2 O 4 →ZnO→Zn (g), respectively. Metallic zinc in ZnFe 2 O 4 phase was reduced, condensed and collected after escaping …
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Mechanisms of Chemical Phosphorus Removal II : Iron (III) …
Total phosphorus removal of 80% was achieved at a dose of 1.48:1 molar ratio Fe:P. When a mixture of pre-hydrolysed iron and iron chloride was added, 80% total phosphorus removal was achievable at a dose of 1.86:1 molar ratio Fe:P. These findings could make a considerable difference to the cost of iron (III) chloride addition for …
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REMOVAL OF PHOSPHORUS THROUGH ROASTING …
The phosphorus content in the iron concentrate is about 0. 6 – 0.8 % and the studies has shown that it is not represented as separable from iron minerals species, Belikov . ... resistant to acid leaching and phosphorus removal during these tests has never exceeded 12 %. Feld . et al, (1966) have tested roasting in the presence of metal ...
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Removal of Phosphorus From High Phosphorus Iron Ores …
The selective HCl leaching method was used to remove phosphorus from high phosphorus iron ores. The hydroxyapatite in high phosphorus iron ores was converted into soluble phosphate during the process of HCl leaching. ... However, some organic phar- maceutical residues easily enter into the concentrate, which will result in …
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