Optimization of process parameters and kinetic modelling for leaching of copper from oxidized copper ore in nitric acid solutions

Tanaydın, Mehmet Kayra; Tanaydın, Zümra Bakıcı; Demirkıran, Nizamettin

doi:10.1016/s1003-6326(22)65875-8

Cited by 8 publications

(6 citation statements)

References 28 publications

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“…This is because increasing the stirring speed suspended the solid particles in the solution, enabling better contact between the leaching solution and the particles. Additionally, a higher stirring speed can reduce the thickness of the diffusion layer formed around the particles, accelerating the mass transfer and external diffusion of the reactants …”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…Additionally, a higher stirring speed can reduce the thickness of the diffusion layer formed around the particles, accelerating the mass transfer and external diffusion of the reactants. 10 When the stirring speed was higher than 450 r/min, there was no significant improvement in potassium leaching. This is because the solid particles were fully suspended in the solution, and increasing the stirring speed no longer reduced the thickness of the mass transfer boundary layer, indicating that the effects of external diffusion and external mass transfer became negligible.…”

Section: Effect Of Reaction Conditions On Thementioning

confidence: 98%

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The Leaching Behavior of Potassium Extraction from Polyhalite Ore in Water

Ma,

Zeng,

et al. 2023

ACS Omega

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The extraction of potassium from polyhalite ore (K 2 SO 4 •MgSO 4 •2CaSO 4 •2H 2 O) can help alleviate potassium resource shortages in China. In this study, the leaching behavior of potassium extracted from polyhalite ore in water was investigated using leaching experiments and kinetic analysis. The effects of various factors, such as liquid-to-solid ratio, leaching temperature, leaching time, and polyhalite ore particle size were comprehensively studied. It was found that high temperatures improved the reaction rate and efficiency at the beginning (1−15 min) but reduced the final leaching efficiency of potassium. And this phenomenon is discussed from the aspects of the dissolution− reprecipitation of potassium, newly formed solid products during the leaching process, and leaching thermodynamics. The leaching of potassium followed the Avrami model, with an apparent activation energy of 26.29 kJ/mol. Additionally, it was determined that the mixed controlled step (surface chemical reaction and diffusion) was the controlling step during potassium leaching. This study clarified the leaching mechanism of the polyhalite in water, and the causes of hindering the leaching of potassium were analyzed. The research results can provide theoretical reference and solutions for parameter design for the enhanced leaching process and selection of leaching agents in the future.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Effect Of Reaction Conditions On Thementioning

confidence: 98%

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The Leaching Behavior of Potassium Extraction from Polyhalite Ore in Water

Ma,

Zeng,

et al. 2023

ACS Omega

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“…Penelitian ini menghasilkan temuan bahwa pada kondisi operasi terbaik yaitu konsentrasi asam nitrat 0,5 mol/L, suhu 50 °C, rasio padat-cair 0,004 g/mL, dan kecepatan pengadukan ditentukan 500 r/mnt, laju pelindian mencapai 99% selama 120 menit waktu reaksi. Selanjutnya uji evaluasi kinetik menghasilkan temuan bahwa laju pelindian meningkat dengan peningkatan suhu, konsentrasi asam dan kecepatan pengadukan, dan dengan penurunan ukuran partikel dan rasio padat-cair [16].…”

Section: Pendahuluanunclassified

Recovery Tembaga Menggunakan Asam Sulfat

2023

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Recovery Cu pada pengolahan bijih tembaga perlu dioptimalkan mengingat kebutuhan industri terhadap logam Cu yang sangat besar. Salah satu cara pengolahan bijih tembaga menggunakan metode pelindian menggunakan larutan H2SO4. Penelitian ini bertujuan mempelajari pengaruh variabel konsentrasi larutan H2SO4 dan waktu proses pelindian terhadap recovery Cu, Fe, Zn. Pada penelitian ini dilakukan eksperimen skala laboratorium dengan variabel konsentrasi H2SO4 : 20 g/L dan 40 g/L, sedangkan variabel waktu proses pelindian : 0,5 jam, 2 jam, 4 jam, 8 jam, 24 jam, 30 jam, 48jam, dan 72 jam. Selanjutnya untuk karakteristik bijih tembaga yang diolah mengandung Cu 1,68%, Fe 39,27%, dan Zn 1,38%. Analisa kandungan Cu, Fe, Zn dari sampel larutan kaya menggunakan metode AAS (Atomic Absorption Spectroscopy). Hasil penelitian menunjukkan bahwa pelindian menggunakan larutan H2SO4 dengan konsentrasi 20 g/L menghasilkan recovery tertinggi : Cu sebesar 79% (24 jam pelindian), Fe sebesar 3,0% (72 jam pelindian), Zn sebesar 85% (72 jam pelindian). Sedangkan pelindian menggunakan larutan H2SO4 dengan konsentrasi 40 g/L menghasilkan recovery tertinggi : Cu sebesar 68% (72 jam pelindian), Fe sebesar 3,3% (72 jam pelindian), Zn sebesar 95% (72 jam pelindian). Hasil penelitian ini sangat penting karena dapat menemukan konsentrasi larutan H2SO4 dan waktu pelindian terbaik sehingga dapat menghemat penggunaan larutan H2SO4 dan waktu pelindian.

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“…Researchers like Habbache et al, reported the leaching process of copper oxide with several acidic solutions including hydrochloric acid, sulfuric acid, nitric acid, and citric acid as leaching reagents in their work on the widespread use of acidic solutions in the leaching of copper [14]. In this study, nitric acid (HNO3) is used which is considered to have several advantages in leaching systems such as lower corrosiveness for equipment, fully ionized in liquid media, regenerable, low cost, and high recovery efficiency [15].…”

Section: Introductionmentioning

confidence: 99%

Recovery and Characterization of Copper Oxide from Cu-Foil Waste by Combination Method of Acid Leaching and Precipitation

Dwiana

2023

ESTA

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<span lang="EN-US">Lithium ion batteries have been widely applied in portable electronic devices and electric vehicles as high-density energy storage. The significant consumption of lithium ion batteries is outweighed by the threat to the environment of battery waste. Recovery of valuable metals contained in lithium ion batteries, such as Cu foil, is one of the efforts to overcome environmental pollution due to copper metal. The hydrometallurgical method is used in the recovery process, which includes leaching using nitric acid and precipitation using oxalic acid. The material obtained was copper oxide (CuO), which was analyzed using XRD, SEM-EDX, and FTIR to determine the characteristics of the sample. XRD analysis showed that the crystallinity of CuO was in accordance with the database. SEM images confirm the presence of agglomeration and inhomogeneous particle distribution in the samples. FTIR analysis confirmed the formation of the CuO phase, and the EDX results showed the purity of the sample, which consisted of Cu and O elements. Based on the research, CuO was successfully produced from the recovery of Cu Foil waste.</span>

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Optimization of process parameters and kinetic modelling for leaching of copper from oxidized copper ore in nitric acid solutions

Cited by 8 publications

References 28 publications

The Leaching Behavior of Potassium Extraction from Polyhalite Ore in Water

The Leaching Behavior of Potassium Extraction from Polyhalite Ore in Water

Recovery Tembaga Menggunakan Asam Sulfat

Recovery and Characterization of Copper Oxide from Cu-Foil Waste by Combination Method of Acid Leaching and Precipitation

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