The present paper deals with the treatment of phosphate obtained from a commercial sample of Akashat phosphate ore in hydrochloric acid. The factors studied are effects of the temperature of dissolution, acid concentration, and the time required for mixing phases. The experiments were performed with 100 kg/m 3 of solid/liquid ratio, the size of the particles ranged 125-140 µm, the …
The effect of process factors on the dissolution reaction showed that the phosphate ore dissolution extent significantly increased with increasing stirring rate, reaction temperature …
[Show full abstract] dissolution efficiency of uranium and P 2 O 5 in hydrochloric acid referring to 88.46 % and 91.37 %, respectively, is obtained under the following conditions: a liquid:solid ...
In this study, the separation of lanthanides from phosphate ore using oxalic acid (C2H2O4), tartaric acid (C4H6O6), lactic acid (C3H6O3), sulfuric acid (H2SO4) and hydrochloric acid (HCl) was ...
The extraction of the coexisting ions, such as Ca 2+, PO 4 3−, Fe 3+, and Mg 2+, was tested with the simulated phosphate ore acid leach solution. The concentration of the above ions was analyzed by ICP. As shown in Table 3, there is <4% extraction of impurity ions while REEs are near 95% extracted. These data show that the rare earths could ...
The present paper deals with the treatment of phosphate obtained from a commercial sample of Akashat phosphate ore in hydrochloric acid. The factors studied are effects of the temperature …
Schorr et al. Phosphate ore processing for phosphoric acid production 126 Mineral Processing and Extractive Metallurgy (Trans. Inst. Min. Metall. C) 2010 VOL 119 NO 3 PA is extracted by contacting ...
The reaction kinetics for the leaching of scheelite CaWO 4 by hydrochloric acid in the presence of a complexing agent, phosphate ion, have been studied in a stirred reactor to determine the effect of the important process variables, such as particle size, temperature, stirring speed, acid concentration and phosphate addition. In the presence of sufficient PO 4 3− …
In the process of phosphorus enrichment, the low-grade phosphate ore is often calcined by a type of thermochemical beneficiation process, or leached by a strong acid such as sulfuric acid, hydrochloric acid, or phosphoric acid . However, the current methods are not very economically efficient and environmentally friendly.
Effects of hydrochloric acid concentration, reaction time, temperature and liquid/solid ratio (vol./wt. basis) on the process have been studied. ... When the ore contains soft and chalky carbonates the flotation results ... phosphate rocks. Hydrochloric acid can be used for the manufacture of phosphoric acid. Phosphoric acid manufactured from
The present paper deals with the treatment of phosphate obtained from a commercial sample of Akashat phosphate ore in hydrochloric acid. The factors studied are effects of the temperature …
Estonian Phosphate Rock Dissolution in Hydrochloric Acid: Optimization of Acid Dosage and Concentration
A defined volume of hydrochloric acid (HCl, d = 1.19) was added to a preweighed amount of phosphate. The tests were made with hydrochloric acid at various concentrations varying between 13% and 23% with stirring of 100 rpm to 300 rpm, and the series of tests were conducted with a solid/liquid ratio of 20% to 50%.
The specimens were reduced at 1,300 °C through treatment with hydrochloric acid. The acid leaching conditions comprised a hydrochloric acid concentration of 7 mol/L, a …
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 …
The present paper deals with the treatment of phosphate obtained from a commercial sample of Akashat phosphate ore in hydrochloric acid. The factors studied are effects of the temperature of dissolution, acid concentration, and the time required for ... (PO4)2 + 2CaCl2 The main factors affecting the reaction rate of acid attack of phosphate are ...
Kinetic study of the leaching of powdered ilmenite ore was carried out in highly concentrated hydrochloric acid (11.3–11.6 mol dm−3) at temperatures of 30 to 80 °C. The changes in shape and grain size of the ore particles with progress of the leaching was simultaneously observed with X-ray diffraction and electron microscope techniques. Titanium and iron were dissolved in a …
The experiments of dissolution of three different EPR samples in hydrochloric acid were carried out with the aim of studying the impact of the chemical and mineralogical composition of EPR on the leaching process. The …
Flow diagram of the smelting concentrate and material balance of rare-earth elements. However, most of the rare-earth elements in the bastnaesite are inevitably oxidized whose valence state increases from trivalent to tetravalent during roasting. 30,31 In the leaching process, by using hydrochloric acid, the tetravalent rare-earth elements will oxidize Cl –1 into Cl 2, which …
hydrochloric acid may be used to selectively leach out the calcareous materials from low grade phosphate rock rather than the dissolution of apatite. In this work, the suitability of dilute …
Phosphoric acid (H 3 PO 4, PA) is an industrial acid, produced from two main types of phosphate rock: sedimentary and igneous. In the classical wet process, wet process PA is produced by a ...
In this study, the leaching kinetics of REEs from a phosphate ore from China was studied with the variation of temperature and phosphoric acid concentration under the conditions: ratio of liquid ...
Then, a structure-related segmented kinetic model for phosphate ore particles dissolution in hydrochloric acid was established to discuss the influence of composition and structure of phosphate ...
Phosphate rock or pre-concentrated phosphate ore is an important raw material for the Egyptian economy with Egypt being the eighth largest phosphate rock producer in the world in 2020 ... the effect of the hydrochloric acid concentration ranging from 0.5 to 4.0 M on the stripping efficiency was investigated and the results are plotted in Fig ...
The known reserves of phosphate ore will likely be exhausted in 50–100 years based on supply and demand dynamics . Such an imbalance between P demand and resources necessitates the development of different ways to reduce P mining. ... and even when a higher concentration of hydrochloric acid was added, the total content of C, H, N, O, and S ...
In the process of phosphorus enrichment, the low-grade phosphate ore is often calcined by a type of thermochemical beneficiation process, or leached by a strong acid such as sulfuric acid, hydrochloric acid, or phosphoric acid . However, the current methods are not very economically efficient and environmentally friendly.
These parameters were fixed at a leaching time of 16 min, stirring speed of 400 rpm, temperature of 25 oC, hydrochloric acid concentration of 5 % and acid/phosphate ore mass ratio of 25 ml/ 5 g ...
This generally accepted term comprises both the unprocessed phosphate ore as well as the concentrated phosphate products ... In this stage, the acid concentration is approx. 26–30% P 2 O 5. For use in fertilizer production or further processing, the acid is ... Darmstadt, Germany). The nitric, hydrochloric, and fluoric acids were of suprapure ...
The H + ions are involved in the extraction of the phosphate elements and their diffusion from the solid phase (phosphate ore) towards the liquid phase (phosphoric acid) whereas the S O 2− 4 ...
The present paper deals with the treatment of phosphate obtained from a commercialsample of Akashat phosphate ore in hydrochloric acid. The factors studied are effectsof the temperature …