Effect of the temperature and the porosity of the gettering process on the removal of heavy metals from Tunisian phosphate rock

Daik, Ridha; Lajnef, M.; Amor, Sana Ben; Ezzaouia, Hatem

doi:10.1016/j.rinp.2017.10.050

Cited by 5 publications

(2 citation statements)

References 18 publications

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“…Furthermore, calcination of Gafsa-Metloui: Jebel Oum El Khacheb deposit [32] and Ras-Dhara deposit [33], as well as M'dhilla [34] phosphate rock, has been investigated, and Jaballi et al [35] analyzed the thermal behavior of phosphate rocks from the Ypresian phosphate deposit. Besides, Daik et al [36] and Dabbebi et al [37] looked into the calcination of phosphate washing waste from the Gafsa-Metloui deposit. The objective of this work was to examine the technical feasibility of a thermal beneficiation path for Sra Ouertane low-grade phosphate rock using calcination, quenching, and disliming.…”

Section: Introductionmentioning

confidence: 99%

Thermal Beneficiation of Sra Ouertane (Tunisia) Low-Grade Phosphate Rock

Abbes

Hermann²,

Steiner

et al. 2020

Minerals

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Low-grade phosphate rock from Sra Ouertane (Tunisia) was beneficiated using a thermal treatment consisting of calcination, quenching, and disliming. Untreated phosphate rock samples (group 1), calcined phosphate rock samples (group 2), as well as calcined, quenched, and dislimed (group 3) phosphate rock samples, were investigated using inductively-coupled plasma atomic emission spectroscopy (ICP-AES), inductively-coupled plasma mass spectrometry (ICP-MS), thermogravimetric analysis (TGA), and X-ray powder diffraction (XRD). Besides, the particle size distribution of the aforementioned three groups was determined. The proposed thermal treatment successfully increased the P2O5 content of the untreated phosphate rock from 20.01 wt% (group 1) to 24.24 wt% (group 2) after calcination and, finally, 27.24 wt% (group 3) after calcination, quenching, and disliming. It was further found that the concentration of relevant accompanying rare earth elements (Ce, La, Nd, Pr, Sm, and Y) was increased and that the concentration of Cd could be significantly reduced from 30 mg/kg to 14 mg/kg with the proposed treatment. The resulting phosphate concentrate showed relatively high concentrations in metal oxides: Ʃ MgO, Fe2O3, Al2O3 = 3.63 wt% and silica (9.81 wt%) so that it did not meet the merchant grade specifications of a minimum P2O5 content of 30 wt% yet. Removal of these elements could be achieved using additional appropriate separation techniques.

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Section: Introductionmentioning

confidence: 99%

Thermal Beneficiation of Sra Ouertane (Tunisia) Low-Grade Phosphate Rock

Abbes

Hermann²,

Steiner

et al. 2020

Minerals

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“…Based on previous research of the phosphate ore, these two types of waste contain probably quartz, carbonates, aluminosilicates and fluorapatite with consideration of the mineralogical composition of phosphate rocks [9,[48][49][50]. These wastes were used and valorised in different fields [51,52]: ceramic industry [26,53], brick manufacture and aggregate production for road and concrete [44,54].…”

Section: Introductionmentioning

confidence: 99%

Effect of the calcinations temperatures of phosphate washing waste on the structural and mechanical properties of geopolymeric mortar

Dabbebi

Aguiar

Camões

et al. 2018

Construction and Building Materials

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Structural Properties of Phosphate-Washing Waste Based Geopolymeric Mortars

Dabbebi

Aguiar

Baklouti

2019

Advances in Science, Technology &Amp; Innovation

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The phosphate ore extraction activities often generate serious environmental problems, particularly those engendered by the phosphate washing waste. The waste was characterized by X ray fluorescence. The powder was calcined at 700°C. The calcined and uncalcined samples were then investigated by means of X-ray powder diffraction (XRD). The calcined PWW was activated with sodium hydroxide and sodium silicate to produce geopolymeric materials. The reached results prove to reveal that the present phases in the powder appeared to have a remarkable effect on the result of compressive strength.

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Effect of the temperature and the porosity of the gettering process on the removal of heavy metals from Tunisian phosphate rock

Cited by 5 publications

References 18 publications

Thermal Beneficiation of Sra Ouertane (Tunisia) Low-Grade Phosphate Rock

Thermal Beneficiation of Sra Ouertane (Tunisia) Low-Grade Phosphate Rock

Effect of the calcinations temperatures of phosphate washing waste on the structural and mechanical properties of geopolymeric mortar

Structural Properties of Phosphate-Washing Waste Based Geopolymeric Mortars

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