Ore agglomeration behavior and its key controlling factors in heap leaching of low-grade copper minerals

Wang, Leiming; Yin, Shenghua; Wu, Aixiang

doi:10.1016/j.jclepro.2020.123705

Cited by 25 publications

(8 citation statements)

References 86 publications

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“…Pemisahan partikel, stratifikasi, ukuran umpan yang terlalu besar menyebabkan permeabilitas tumpukan yang buruk dan efisiensi pelindian rendah. Hasil penelitian tersebut menawarkan referensi yang baik untuk pengoperasian tumpukan aglomerasi industri [9]. Bijih tembaga bermutu rendah dengan kandungan butiran halus yang tinggi diperlukan untuk aglomerasi karena permeabilitas lapisan bijih yang rendah selama pelindian tumpukan asam.…”

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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Section: Pendahuluanunclassified

Recovery Tembaga Menggunakan Asam Sulfat

2023

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“…Basahel and Mitri probabilistically evaluate the slope stability using response surface approach (RSA) [18]. Some existing cognitive consensus is that the gradual increase in mining depth requires a signi cant increase in the height, area, and maintenance time of mining slopes [19][20][21]. Except for the slope depth, the structure of the open-pit mining layer, geotechnical characteristics, fault cracks, and distribution of water systems also affect the stability of the nal slope [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Landslide Disaster Modeling and Analysis using CDEM in the Southern Slope of Fushun West Open Pit Mine

Xie,

Wang,

Yang

et al. 2024

Preprint

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Landslides in open-pit mines have extremely high potential risks in the mining process due to their characteristics such as high speed, short distance, and the chain effect of other disasters. Taking the southern slope landslide of Fushun West Open Pit Mine (FWOPM) as an example, based on the dynamic process of the southern slope landslide, the deformation and failure mechanism and disaster chain disaster mode of the southern slope landslide are analyzed. The continuum discontinuum element method (CDEM) is constructed to reveal the evolution characteristics of the landslide, and a sudden change series method is proposed for landslide disaster analysis. The research results indicate that the entire process of the southern slope landslide can be summarized as follows: bedding slip stage, slight bending stage, strong bending stage, uplift stage and cut through stage. The geological hazard level of the southern slope landslide in FWOPM has a membership degree of 0.97, which belongs to a super large landslide and is basically consistent with the actual situation. This method is effective in the analysis of landslide disasters in southern slope landslide, and has good significance for slope landslide disasters prediction in FWOPM.

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“…The permeability of ore heaps is an important factor affecting ore heap leaching. Scholars [ 8 , 9 ] have carried out relevant research on the relationships between ore heap structure, the leaching process and ore heap permeability. Zhang [ 10 ] investigated the effect of three types of grain size gradation on porosity and pore size distribution using the bulk density and the computed tomography (CT) scanning methods.…”

Section: Introductionmentioning

confidence: 99%

Influence of surfactant on the permeability at different positions of a leaching column

Ping-Ping

Yin

et al. 2022

PLoS ONE

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To solve the problems of poor permeability and low leaching rate in ore heap leaching, solid surface physical chemistry, seepage mechanics theory for porous media, CT scanning and SEM were used to carry out column leaching tests with a homemade segmented removable plexiglass column; the variation law for the permeability coefficients of each segment of the leaching column before and after leaching was analyzed. The experimental results showed that there was little difference in the permeability coefficient of ore at different heights before leaching. After leaching, the permeability coefficients were unevenly distributed along the column height, and the lowest value was located at the bottom of the leaching column. The addition of surfactant provided an obvious improvement in the permeability of the leaching column. The permeability coefficient at the bottom of the leaching column was 6% higher than that of the control group. At the same time, the addition of surfactant increased the leaching rate of ore by nearly 10%. A theoretical analysis showed that the surfactant improved the permeability of ore heaps mainly by preventing physical blockage by fine particles and inhibiting deposition of chemical products.

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Ore agglomeration behavior and its key controlling factors in heap leaching of low-grade copper minerals

Cited by 25 publications

References 86 publications

Recovery Tembaga Menggunakan Asam Sulfat

Recovery Tembaga Menggunakan Asam Sulfat

Landslide Disaster Modeling and Analysis using CDEM in the Southern Slope of Fushun West Open Pit Mine

Influence of surfactant on the permeability at different positions of a leaching column

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