v117n4a11 Iron recovery and phosphorus removal from …
0.021% silicon (by mass) was produced from optimally reduced ore-char briquettes, and molten iron containing 0.78% phosphorus and 0.91% silicon from optimally reduced ore–coal briquettes. The study indicates that carbonaceous materials with high CO2 reactivity are suitable for use in the FASTMELT process for phosphorus removal and iron ...
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Upgrading iron and removing phosphorus of high …
based on the iron grade, phosphorus content and iron recovery in magnetic products. 3. r esults and discussion 3.1 Thermal analysis TG-DTA of high phosphorous oolitic iron ores were conducted from 35 to 900°C in air at a heating rate of 10°C/min, and the results are presented in Fig. 3. It can be seen that the total heat absorption was
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Predictability of Phosphorus Removal Based on Simultaneously …
This paper presents the predictability of phosphorus removal based on simultaneously removed sulphur and mass-input of iron ore leached in potassium hydroxide. The reaction vessel containing the solution and ore was heated at a temperature of 600°C for 10minutes. The model; P = 61.8477 x 10 -3 μ - 2.27S shows that the predicted concentration of removed …
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Removal of phosphorus-rich phase from high-phosphorous iron ore …
A new approach of removing the phosphorus-rich phase from high-phosphorous iron ore by melt separation at 1573 K in a super- gravity field was investigated. The iron-slag separation by super-gravity resulted in phosphorus being effectively removed from the iron-rich phase and concentrated as a phosphorus-rich phase at a temperature below the melting …
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Removal of Phosphorus From High Phosphorus Iron Ores by
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. The effects of reaction time, particle size, hydrochloric acid concentration, reaction temperature, liquid-solid ratio and stirring strength on …
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Phosphorus Treatment and Removal Technologies
clarifier), a dose of 1.0 mole of aluminum or iron per mole of phosphorus is sufficient. For lower phosphorus concentrations in the range of 0.3 – 1.0 mg/L, the dose can be in the range of 1.2 to 4.0 moles aluminum or iron per mole of phosphorus. The pH value is an important factor for efficient removal of phosphorus using alum or other
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[PDF] Synchronous Upgrading Iron and Phosphorus Removal …
The results show that under the proper conditions, a final metallic iron powder assaying over 91% Fe and 0.25% P was obtained with iron recovery of 90% and phosphorus removal rate of 91.79% using the new process, indicating that the high temperature flash reduction process is a feasible and efficient way to process this kind of complex and ...
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REMOVAL OF PHOSPHORUS THROUGH ROASTING OF …
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.
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Selective Reduction of Iron and Phosphorus from Oolitic Ore
The possibility of selective solid-phase reduction of iron from oolitic ore has been experimentally confirmed. Solid phase reduction was carried out at temperatures of 850 and 1000°C in a CO atmosphere and in a mixture with solid carbon. Distribution of iron and phosphorus was investigated with a scanning electron microscope.
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Removal of Phosphorus From High Phosphorus Iron Ores by …
In this paper, the effect of reaction time, high phosphorus iron ore particle size, dephosphorization agent concentration, stirring strength (G), liquid- solid ratio (amount of leaching solution with differ- ent concentration/amount of iron ore, different liq- uid-solid ratios represent different addition of acid) and reaction temperature on ...
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Phosphorus Removal of High Phosphorous Oolitic Iron Ore …
The phosphorus content in the DRI is still relative high even though there is no carbon in DRI, and it can be decreased to 0.087 wt% (raw ore 1.2 wt%) with the optimum condition in this study. It is proved that P exists in the DRI recovered from melt separation in the form of P 2 O 5 inclusions or Fe x P as solid solutions, while not in the ...
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Enrichment of Phosphorus from Iron Ore to Dicalcium-silicate …
Abstract. Due to the low quality of available iron ore, it is necessary to develop a new technology to produce high quality steel from ore containing a high concentration of phosphorous. In this study, we propose a new process for producing low-P steel by concentrating P in the dicalcium silicate phase through a partial reduction process.
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Concentrating of Iron, Slag and Apatite Phases from High Phosphorous …
According to the melting behavior of high phosphorous iron ore gaseous reduction product at 1473 K, the iron grains remain in solid state, and the other minerals have formed into slag phase, as well as the phosphorus mainly exist in the form of apatite coexisting with slag phase, while it is impossible to accomplish the iron-slag separation at that temperature under the …
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Selective recovery of phosphorus from acid leach liquor of …
many iron ore production areas, such as West Australia, Brazil, South Africa and Central South of China.1–5 According to the statistical survey, the reserves of high phosphorus iron ore reach 7.45 billion tons in China, and among them more than 4 billion tons was deposited in Hubei province with an average level of 1.0% phosphorus and 50% ...
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Solid State Desulphurization of Iron Ore and Empirical …
leaching of iron oxide ore in sulphuric acid solution [6]. The work indicated that phosphorus removal from the iron oxide ore as obtained from experiment and derived model is dependent on the initial and final pH of the leaching solution. This is …
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Removal of phosphorus from iron ores by chemical leaching
The results show that phosphorus occurring as apatite phase could be removed by alkali-leaching, but those occurring in the iron phase could not. Sulfuric acid is the most effective among the three kinds of acid. 91.61% phosphorus removal was attained with 1% sulfuric acid after leaching for 20 min at room temperature.
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Removal of Phosphorus from High Phosphorus Iron …
In the process of resource utilization of high phosphorus iron ores, phosphorus should be removed first. Compared to other dephosphorization methods, …
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Journal of Engineering Model for evaluation of Phosphorus …
were used for removing phosphorus from Agbaja (Nigeria) iron oxide ore, recording efficiencies of 81, 63 and 68% for 5, 100 and 250 mesh grain sizes respectively at the end of the 49 days of the leaching process. Studies [3-5] on iron ore dephosphorization using hydrometallurgy has shown that phosphorus removal during
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Removal of Phosphorus from High-phosphorus Iron Ore with …
KEY WORDS: iron ore; phosphorus; reduction; electrical pulse disintegration; magnetic separation. the dephosphorization load in the steelmaking process can be greatly reduced.1,4–6) Establishment of the separation technique is necessary since the P-concentrated phases and other phases in the reduction product exist in a mixed state.
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Processes for phosphorus removal from iron ore - a review
2.2.3.2 Flotation. There are many citations in literature on the reduction of phosphorus in iron ore through anionic flotation, using a fatty acid as collector and sodium silicate as a depressant of iron oxides, when the mainphosphorus-bearing mineral is apatite (Ranjbar, 2002 RANJBAR, M. Dephosphorization of iranian iron oxide fines by flotation.. Erzmetall, v. 55, n. 11, p. 612-62
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REMOVAL OF SULFUR AND PHOSPHOROUS FROM IRON …
per year. The minerals in the iron ore are mainly of magnetite and hematite, but many of the iron ore rocks and mines contain sulfide minerals such as pyrite, chalcopyrite, arsenopyrite, etc. The sulfur content of iron ore concentrates is generally about 0.5% to 2%, and sometimes more than 0.7%, while the permitted limit of steel industries is
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Removal of Phosphorus From High Phosphorus Iron Ores …
In order to effectively remove the phosphorus from high phosphorus iron ores, while reduce the amount of acid and the iron losses, phosphorus will be removed in the form of soluble phosphate salts by selective hydrochloric acid leaching in this research.
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Processes for phosphorus removal from iron ore - A …
Phosphorus can be removed from iron ore by very different routes of treatment. The genesis of the reserve, the mineralogy, the cost and …
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Distribution Characteristics of Phosphorus in the Metallic Iron …
The distribution characteristics of phosphorus in the metallic iron, and the reduction behaviors of hematite and fluorapatite during solid-state reductive roasting of a phosphorus-rich (1.3 mass%) oolitic hematite ore were investigated in the temperature range of 900°C–1200°C.
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(PDF) Phosphorus Removal and Iron Recovery from High-Phosphorus …
The phosphorus associated with the ore was found to be present in both the iron-rich mineral(s) and the gangue minerals, indicating that beneficiation by elimination of gangue will have little ...
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Distribution Characteristics of Phosphorus in the Metallic …
The distribution characteristics of phosphorus in the metallic iron, and the reduction behaviors of hematite and fluorapatite during solid-state reductive roasting of a phosphorus-rich (1.3 mass%) oolitic hematite ore were investigated in the temperature range of 900°C–1200°C.
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Solid State Desulphurization of Iron Ore and Empirical …
oxide ore and also predicting removed phosphorus concentrations using empirical models. A model was derived for predictive analysis of the concentration of phosphorus removed during leaching of iron oxide ore in sulphuric acid solution [6]. The work indicated that phosphorus removal from the iron oxide ore as obtained from experiment and ...
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Removal of Phosphorus from High Phosphorus Iron …
In the process of resource utilization of high phosphorus iron ores, phosphorus should be removed first. Compared to other dephosphorization methods, selective leaching with acid has special advantages such as high …
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Predictability of Phosphorus Removal Based on …
The present work is predictability of phosphorus removal based on simultaneously removed sulphur and mass-input of iron ore (from Itakpe, leached in Nigeria) potassium hydroxide. 2. Model The solid phase (ore) is assumed to be stationary, contains the unleached iron remaini- ng in the ore. It is strongly believedthat hydrogen peroxide gas
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Solid State Desulphurization of Iron Ore and …
Keywords: Prediction, Iron Extraction Rate, Phosphorus Removal, Hydrogen Peroxide, Iron Ore Leaching. {Citation: T. O. Chime. Predictability of iron extraction rate based on rate of phosphorus removal and as-beneficiated phosphorus content during leaching in H. 2. O. 2. American Journal of Research Communication, 2013, 1(8): 130-139} ...
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REMOVAL OF PHOSPHORUS THROUGH ROASTING …
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.
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Phosphorus Removal of High Phosphorus Iron Ore by Gas …
And the other is that the generation of glassy slag severely inhibits the gas-solid reaction. And still the unique onion-skin structure in the oolitic ore unit may also give a resistance against gas transfer into it. 4.2 Iron and phosphorus in the reduced ore samples SEM and EDS analysis to the cross section of the oolitic of the CO-reduced ore ...
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Reduction of Iron Ore Contain Phosphorous - ijmrap.com
2.1 Chemical Analysis of High Phosphorous Iron Ore The chemical analysis of high phosphorous iron ore presents in Table I. From which it is evident that iron ore contains 1,84 % P 2 O 5 and weight lose equal 14.2 %. TABLE I. Analyses of high phosphorous iron ore percentage Compounds or elements Percentage Fe 2 O 3 44.82 % SiO 2 20.65 %
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Solid State Desulphurization of Iron Ore and Empirical …
Keywords: Prediction, Iron Extraction Rate, Phosphorus Removal, Hydrogen Peroxide, Iron Ore Leaching. {Citation: T. O. Chime. Predictability of iron extraction rate based on rate of phosphorus removal and as-beneficiated phosphorus content during leaching in H. 2. O. 2. American Journal of Research Communication, 2013, 1(8): 130-139} ...
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Selective recovery of phosphorus from acid leach liquor of iron ore …
Table 1 shows the XRF results of the raw high phosphorus iron ore, solid obtained from the acid leach liquor by drying and crystallization, and iron ore residuals after acid leaching. It can be seen that the content of phosphorus in the iron ore decreased from 3.17% to 0.51% before and after acid leaching, respectively, meaning that it was ...
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Removal of phosphorus from iron ores by chemical leaching
Sulfuric acid is the most effective among the three kinds of acid. 91.61% phosphorus removal was attained with 1% sulfuric acid after leaching for 20 min at room temperature. Iron loss during...
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Review Phosphorus Removal of High Phosphorous Oolitic …
The iron oxides in the high phosphorus iron ore are mainly in the type of Fe 2O 3 and FeO. Assume that the total weight of the iron ore is "m" g, of which the Fe 2O 3 weight is "a" g and the FeO weight is "b" g, then the total oxygen weight loss of Fe 2O 3 and FeO are 3/10a g and 2/9b g respectively. The total iron in the raw ore is ...
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