Dissolution of Djebel Onk phosphate ore using sulfuric acid

Lassis, M.; Mizane, A.; Dadda, Noureddine; Rehamnia, R.

doi:10.1016/j.enmm.2015.03.002

Cited by 20 publications

(10 citation statements)

References 13 publications

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“…through the sieve 170 mesh (88 μm) and the sieve 80 mesh (177 μm). This is consistent with the work of Lassis et al 22 . Generally the P 2 O 5 recovery is inversely proportional to the phosphate particle size which may be due to the increase of the specifi c surface area.…”

Section: Acknowledgementsupporting

confidence: 83%

“…The phosphates of the area of Djebel Onk, located in the Southeast of Algeria, are part of a succession of sedimentary strata formed at the end of the Cretaceous--Eocene era 21 . phosphate rock, used in the experiments, is a fl uorapatite and is characterized by a granular appearance; it has a high substitution of CO 3 (CaO/ P 2 O 5 = 1.75 to 1.90) and generally is low in silica and in iron 22 . From the literature and research we carried out on Djebel Onk phosphates, it can be concluded that only few investigations and studies were conducted on these phosphates despite their high quality (24-28% P 2 O 5 ) and important reserves (about 2 billions of tons) 23 .…”

Section: -20mentioning

confidence: 99%

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Obtaining the partially acidulated phosphate rocks by means of intermediate-grade phosphate and diluted phosphoric acid: Influence of some parameters

Mizane

Boumerah

Dadda

et al. 2016

Polish Journal of Chemical Technology

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In this work, some parameters during the partial acidulation by phosphoric acid of phosphate 53.75% BPL (bone phosphate of lime) having different particle sizes are determined. P 2 O 5 recovery is obtained by performing a series of reactions using phosphoric acid diluted from 10 to 40 wt.% and with reaction times ranging from 10 to 50 minutes. The best conversion rates are obtained with the following reaction parameters: phosphates size: 88-177 μm, reaction time: 50 minutes and phosphoric acid concentration: 40 wt.%. In the second part, the water-soluble P 2 O 5 of PAPRs (Partially Acidulated Phosphate Rocks) obtained with phosphoric acid 30% and 40 wt.% is measured. The results of experiments showed that the water-soluble P 2 O 5 has reached 15.2% for PAPRs obtained by reacting phosphate 88 μm with phosphoric acid 40 wt%.

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Section: Acknowledgementsupporting

confidence: 83%

Section: -20mentioning

confidence: 99%

Obtaining the partially acidulated phosphate rocks by means of intermediate-grade phosphate and diluted phosphoric acid: Influence of some parameters

Mizane

Boumerah

Dadda

et al. 2016

Polish Journal of Chemical Technology

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“…Wet process (WPA) is the most common method for phosphate fertilizers production, thermal process gives higher purity and is used in non fertilizer products, rotary kiln process is a promising method as it reduces the environmental footprint [4]. In the wet process, the mineral is treated with mineral acids that may be nitric, hydrochloric or sulfuric according to: Globally, most of phosphoric acid is manufactured by the wet process using sulfuric acid as leaching agent that has the advantage of forming an insoluble precipitate of calcium sulfate dihydrate (phosphogypsum, (10CaSO 4 .2H 2 O)) in addition to radionuclides and lanthanides that are coprecipitated [5][6][7][8]. Three fractions of phosphoric acid are produced depending on the process conditions namely: Dihydrate acid, WPA [ WPA contains many impurities that depend on the origin of phosphate ores and which render the phosphoric acid unsuitable for certain uses, such as, metal treatment, food ingredients and electronic applications, therefore, it must be purified before use.…”

Section: Introductionmentioning

confidence: 99%

Overview on the removal of iron from phosphoric acid: A Comparative study

Ahmed

2021

Arab Journal of Nuclear Sciences and Applications

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Wet process phosphoric acid (WPA) represents the main route for phosphate fertilizers world ' s production using sulfuric acid as leaching agent. The produced acid is contaminated with various metal ions as iron, aluminum, cadmium, arsenic, uranium, etc. that limit its use in metal finishing, food, cosmetics and electronic industries. Hence, purification of the wet phosphoric acid is a challenge task. The presence of high concentration of iron in phosphoric acid leads to many problems that affect the production process as increasing the viscosity, decreasing the filtration ration rate, formation of precipitates during concentration, clarification and storage, P 2 O 5 loss in addition to decreasing the solubility of fertilizers, The present review gives an overview on the removal of iron from crude phosphoric acid by some commonly used techniques including precipitation, sorption and solvent extraction to evaluate the efficiency and drawbacks of each process. The pre-treatments of phosphoric acid are also discussed.

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“…Knowing that the phosphate fertilizer industry and phosphoric acid which absorbs more than 90 % of the production of concentrated phosphate im poses quality requirements of the raw material. These requirements are related to the nature of the impurities [4] in the ore and the importance of their impact on the manufacturing process of fertilizers [5,6]. The main quality parameters of these minerals are defined mainly by the major (P 2 O 5 , MgO, ...) and trace (Cr, Sr, U, …) element contents of the ore [2].…”

Section: Introductionmentioning

confidence: 99%

Characterization and homogenization of Bled El-Hadba phosphate ore, case of Djebel Onk (Algeria)

Tahri¹,

Bouzenzana²,

Bezzi³

2019

NVNGU

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ChARACTeRIZATIoN AND homogeNIZATIoN of BleD el-hADBAPhoSPhATe oRe, CASe of DjeBel oNK (AlgeRIA)Purpose. The aim of this study is the characterization and the development of an efficient and profitable technol ogy for the production of one or several types of concentrates with a minimum of penalizing elements which must be competitive at the national and international levels.methodology. The completion of this study required the use of several methods of chemical analysis, advanced ICPMS, SEM and XRD for defining phosphate mesh elements and gangue minerals present in the raw material, basic chemical composition and microelements (trace elements), as well as their distribution by fractions.findings. These studies have revealed that phosphate elements play a significant role within the main sublayer (ML) which is situated between two other sublayers (upper (UL) and lower (LL)). We obtained significant differ ences in the particle shapes and sizes, especially in the two sublayers (UL and LL). A close relation between trace elements and various minerals (apatite, dolomite and silicates is evidenced through operations of substitution.originality. The research data has testified that phosphate elements play a significant role within main sublayer (ML) which is situated between two other sublayers (upper (UL) and lower (LL)). We obtained significant differ ences in the particle shapes and size, especially in the two sublayers (UL and LL).Practical value. The homogenization of raw materials (UL, ML and LL) developed in the laboratory has led to satisfactory results, because it presents a very wide range of variants while the poor ores of the UL and LL layers can be exploited in the amount up to 20 % each minimizing the rates of mining wastes.

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Dissolution of Djebel Onk phosphate ore using sulfuric acid

Cited by 20 publications

References 13 publications

Obtaining the partially acidulated phosphate rocks by means of intermediate-grade phosphate and diluted phosphoric acid: Influence of some parameters

Obtaining the partially acidulated phosphate rocks by means of intermediate-grade phosphate and diluted phosphoric acid: Influence of some parameters

Overview on the removal of iron from phosphoric acid: A Comparative study

Characterization and homogenization of Bled El-Hadba phosphate ore, case of Djebel Onk (Algeria)

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