Neural model for the leaching of celestite in sodium carbonate solution

Bingöl, Deniz; Aydoğan, Salih; Gültekin, Sinan

doi:10.1016/j.cej.2010.10.007

Cited by 20 publications

(25 citation statements)

References 25 publications

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“…9,12 The formed sulfide is then leached with hot water and strontium is precipitated from the solution as SrCO 3 using carbonating agents such as sodium carbonate (Na 2 CO 3 ), ammonium carbonate ((NH 4 ) 2 CO 3 ), ammonium oxalate (NH 4 ) 2 C 2 O 4 ), or carbon dioxide (CO 2 ). 9,[13][14][15][16][17] In the double decomposition or direct conversion method, which is an ion-exchange reaction of SrSO 4 with any carbonate, finely powdered Celestite is reacted with aqueous sodium carbonate solution to obtain directly SrCO 3 and sodium sulfate by-product via following reaction:…”

Section: Introductionmentioning

confidence: 99%

“…In black ash process, SrSO 4 is reduced with coke at temperatures generally over 950°C to produce water‐soluble SrS 9,12 . The formed sulfide is then leached with hot water and strontium is precipitated from the solution as SrCO 3 using carbonating agents such as sodium carbonate (Na 2 CO 3 ), ammonium carbonate ((NH 4 ) 2 CO 3 ), ammonium oxalate (NH 4 ) 2 C 2 O 4 ), or carbon dioxide (CO 2 ) 9,13‐17 …”

Section: Introductionmentioning

confidence: 99%

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High‐efficiency mechanochemical synthesis of Strontium carbonate nanopowder from Celestite

Dayani

AmirArjmand²,

Nouri‐Khezrabad

et al. 2020

Int J Applied Ceramic Tech

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In this study, the conversion of Celestite to SrCO 3 was studied by wet mechanochemical synthesis in a high-energy ball mill and treatment with Na 2 CO 3. For this purpose, solid strontium carbonate and soluble Na 2 SO 4 were obtained after wet milling of Celestite powder and sodium carbonate. The solid phase was washed with water at room temperature by filter pressing. X-Ray diffraction patterns showed that the SrCO 3 nanopowder was synthesized and conversion boosted with increasing the milling time up to 8 hours Also, Rietveld refinement analysis was used to calculate the fraction of SrCO 3 as well as structural properties of synthesized samples. It was found that initial Celestite could be converted to strontium carbonate with a purity more than 98% using high-energy milling without simultaneous heating. The optimum milling time was determined as 4 hours resulting in formation of nanopowders with an average particle size around 90 nm. Field Emission Scanning Electron Microscopy (FE-SEM), clearly showed the nanoscale structure of the synthesized powders.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High‐efficiency mechanochemical synthesis of Strontium carbonate nanopowder from Celestite

Dayani

AmirArjmand²,

Nouri‐Khezrabad

et al. 2020

Int J Applied Ceramic Tech

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“…They concluded that the leaching of SrSO 4 in Na 2 S solution was possible but slow. 6 16 In other studies by Bingöl et al 17,18 , the conversion of celestite with (NH 4 ) 2 CO 3 to strontium carbonate were investigated using dry and wet mechano-chemical treatment in a planetary mill The next step in the production of strontium metal are the calcinations of SrCO 3 . They claimed that the dissolution reaction of SrSO 4 was under chemical reaction control.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of conversion of celestite to strontium carbonate in solutions containing carbonate, bicarbonate and ammonium ions and dissolved ammonia

Zorağa

Kahruman

2014

JSCS

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Celestite concentrate (SrSO 4 ) was converted to SrCO 3 in solutions containing CO 3 2-, HCO 3 and NH 4 + and dissolved ammonia. The effects of stirring speed, CO 3 2concentration; temperature and particle size of SrSO 4 on the reaction rate were investigated. It was found that the conversion of SrSO 4 was increased by increasing the temperature and decreasing the particle size, while the reaction rate was decreased with increasing the CO 3 2concentration. However, the stirring speed had no effect on the reaction rate. The conversion reaction was under chemical reaction control and the shrinking core model was suitable to explain the reaction kinetics. The apparent activation energy for the conversion reaction was found to be 41.9 kJ mol -1 . The amounts of the elements in the reaction solution were determined quantitatively by inductively coupled plasma-optical emission spectrometry. The characterization of the solid reactant and product was made using the scanning electron microscopyenergy dispersive spectrometry and X-ray powder diffraction analytical techniques.

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“…In this article, recently published works on ANFIS and leaching of celestite are summarized. The rest of the article is organized as follows: Section provides a brief description of materials and methods, and section describes the results of the ANFIS model and compares them with ANN results. Finally, section discusses the conclusions and outcomes of the study.…”

Section: Introductionmentioning

confidence: 99%

Predicting the Conversion Ratio for the Leaching of Celestite in Sodium Carbonate Solution Using an Adaptive Neuro-Fuzzy Inference System

İnal

2014

Ind. Eng. Chem. Res.

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In this study, an adaptive neuro-fuzzy inference system (ANFIS) was used to predict conversion kinetics as the percent ratio of SrSO 4 to SrCO 3 in sodium carbonate solution. The results of the ANFIS were compared to a previous study of multilayer perceptron (MLP) artificial neural networks (ANNs) that used the same data set. The ANFIS model showed proper fitting to the experimental data according to the mean absolute error (MAE) and determination coefficient (R 2 value). The ANFIS model can easily determine the conversion ratio of SrSO 4 to SrCO 3 . Hence, it is possible to predict the ratio without measuring parameters under different experiments. The Matlab program was used for all coding. Moreover, a user interface program was developed in Simulink to simulate the ANFIS model for entering combinations of input parameters. The ANFIS output showed a satisfactory result in terms of overall performance.

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Neural model for the leaching of celestite in sodium carbonate solution

Cited by 20 publications

References 25 publications

High‐efficiency mechanochemical synthesis of Strontium carbonate nanopowder from Celestite

High‐efficiency mechanochemical synthesis of Strontium carbonate nanopowder from Celestite

Kinetics of conversion of celestite to strontium carbonate in solutions containing carbonate, bicarbonate and ammonium ions and dissolved ammonia

Predicting the Conversion Ratio for the Leaching of Celestite in Sodium Carbonate Solution Using an Adaptive Neuro-Fuzzy Inference System

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