Amenability for processing of oolitic iron ore concentrate for phosphorus removal

Ionkov, Krassimir; Gaydardzhiev, Stoyan; Araújo, Armando Corrêa de; Bastin, David; Lacoste, Marine

doi:10.1016/j.mineng.2013.03.028

Cited by 52 publications

(23 citation statements)

References 4 publications

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“…1, higher pH inhibited the adsorption of phosphate on the particles. It was also attempted to elute the adsorbed phosphate off the particles by using dilute acid, such as 0.5 mol L À1 HCl, HNO 3 and H 2 SO 4 , and it was found that no more than 30% of phosphate can be desorbed. Fig.…”

Section: Repeating Adsorption and Desorption Testmentioning

confidence: 99%

Selective recovery of phosphorus from acid leach liquor of iron ore by garlic peel adsorbent

et al. 2018

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Dephosphorisation of iron ore is an important challenge to the sustainable development of iron-making industry. Hydrometallurgical processing is quite effective in the reduction of phosphorus level from iron ores, where dilute sulfuric acid is commonly chosen as the lixiviant due to its prominent costeffectiveness. A cheap and effective biosorbent synthesized from garlic peel was proposed in present study to recover phosphorus selectively from acid leach liquor directly under acidic conditions near pH 1-2, allowing high purity phosphorus to be recovered and the residual acid to be recycled for the next round of leaching. This proposal would sharply reduce the dephosphorisation costs of iron ore. Various batch experiments were carried out under different conditions including varying pH, contact time, adsorbent dosages, and metal ion concentration to identify the optimal adsorption parameters for the model solutions. Results showed that the optimal pH for phosphate adsorption was around 1.5 and adsorption equilibrium was attained in 240 min, and the maximum adsorption capacity for phosphate was 1.40 mmol g À1 and 0.81 mmol g À1 at equilibrium pH of 1.5 and 6.5, respectively. A NaOH solution was effective to elute the adsorbed phosphate, and the eluted solution contained mainly Na 3 PO 4 and NaOH. Recovery of phosphorus from the iron ore leach liquor by the garlic peel adsorbent was quite effective, and the adsorption efficiency could retain 85% of the original adsorption capability even after five cycles of adsorption and desorption. In summary, the Zr-loaded garlic peel appears a potential lowcost and effective adsorbent for phosphate recovery from the acid leach liquor of high phosphorus iron ore.

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Section: Repeating Adsorption and Desorption Testmentioning

confidence: 99%

Selective recovery of phosphorus from acid leach liquor of iron ore by garlic peel adsorbent

et al. 2018

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“…It was reported that acid leaching of high phosphorus-containing iron ores could dramatically reduce the phosphorus content in concentrates [13][14][15][16]. For example, the hydrochloric acid leaching of an iron ore containing 1.16% phosphorus removed 98% phosphorus at a particle size of 100% passing 0.147 mm.…”

Section: Introductionmentioning

confidence: 99%

Reaction Behavior of Phosphorus in Coal-Based Reduction of an Oolitic Hematite Ore and Pre-Dephosphorization of Reduced Iron

Gao

Han

et al. 2016

Metals

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Coal-based reduction followed by magnetic separation is an effective way to recover iron from high phosphorus-containing oolitic hematite ore. Given that high quantities of dephosphorization agent are needed to obtain low phosphorus reduced iron, a novel approach is proposed by the authors. Without prior phosphorus removal, the phosphorus was enriched in the reduced iron during a reduction process, then high-phosphorus reduced iron was refined to low phosphorus molten iron and high phosphorus dephosphorization slag to be used as a phosphate fertilizer. The influences of various parameters, including the reduction temperature, the reduction time, and the C/O molar ratio, on the reaction behavior of phosphorus during reduction process were studied. Experimental results indicate that a higher reduction temperature, a longer reduction time, or a higher C/O molar ratio was favorable for the reduction of apatite to phosphorus and the enrichment of phosphorus in reduced iron. X-ray diffraction (XRD) analysis demonstrated that the apatite was reduced to phosphorus and Ca 2 SiO 4 (or Ca(Al 2 Si 2 O 8 )) in the presence of SiO 2 and Al 2 O 3 , whilst the phosphorus enriched in reduced iron formed Fe 3 P. The migration behavior of phosphorus was investigated using line scanning analysis of reduction products at different reduction times. The results show that the phosphorus primarily existed in the slag phase 10 min before reduction, and a large amount of phosphorus migrated into iron phase from slag phase with a reduction time of 40 min. The phosphorus content in the iron phase only slightly changed after 50 min. The pre-dephosphorization of reduced iron was performed at 1873 K, indicating a higher basicity or Fe t O content of CaO-based slag was beneficial to dephosphorization of the reduced iron.

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“…5) Hence, some hydrometallurgy methods were proposed for the phosphorus removal of high phosphorous iron ores, including the acid leaching process, 6) the alkaline leaching process, 7) the bioleaching process [8][9][10] and some combined process. 11) M. J. Fisher-White 12,13) and J. T. Yu 3) have investigated the dephosphorization effect on the iron ores through different acid leaching, and they both found that the phosphorus can be removed with little dissolution of iron and acid consumption at optimum conditions.…”

Section: Introductionmentioning

confidence: 99%

Concentrating of Iron, Slag and Apatite Phases from High Phosphorous Iron Ore Gaseous Reduction Product at 1473 K by Super Gravity

Gao

Guo

2015

ISIJ Int.

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According to the melting behavior of high phosphorous iron ore gaseous reduction product at 1 473 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 conventional conditions. Hence, concentrating experiments of iron, slag and apatite phases from high phosphorous iron ore gaseous reduction product at 1 473 K by super gravity were carried out in this study, and the results confirmed that it was a feasible and effective method. The layered structures appear significantly in the samples obtained by super gravity treatment, the iron grains and molten slag moved in opposite direction and concentrated at the bottom and upper of the sample, respectively, and the apatite crystals concentrated in the iron-slag interface. Moreover, increasing the gravity coefficient is definitely beneficial for the separating and concentrating of iron, slag and apatite phase. With the gravity coefficient of G = 1 200, the mass fraction of MFe in the iron rich phase is up to 90.50 wt%, and that of P is decreased to 0.061 wt% after removing the slag inclusion in iron rich phase.

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Amenability for processing of oolitic iron ore concentrate for phosphorus removal

Cited by 52 publications

References 4 publications

Selective recovery of phosphorus from acid leach liquor of iron ore by garlic peel adsorbent

Selective recovery of phosphorus from acid leach liquor of iron ore by garlic peel adsorbent

Reaction Behavior of Phosphorus in Coal-Based Reduction of an Oolitic Hematite Ore and Pre-Dephosphorization of Reduced Iron

Concentrating of Iron, Slag and Apatite Phases from High Phosphorous Iron Ore Gaseous Reduction Product at 1473 K by Super Gravity

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