The solvent extraction of yttrium and neodymium from copper pregnant leach solutions (PLS) using Primene JM-T, a primary aliphatic amine, has been studied. Effect of contact time, pH, sulfate concentration, and extractant concentration were investigated using...
Thiosulfate leaching is a promising alternative to cyanidation, and the main hindrances for its wide commercial application are the high thiosulfate consumption and the difficult recovery of dissolved gold. In this review, the four solutions to reduce the consumption of thiosulfate, including the control of reaction conditions, the use of additives, the …
A drainage system collects the pregnant leach solution (PLS) at the base of the heap. The PLS is then pumped to the processing units to extract the value metal. The barren ... The use of a mineralogical data base for production forecasting and troubleshooting in copper leach operations. In Proceedings of the C. 99, Copper 99 …
This study shows the feasibility of recovering copper directly from Pregnant Leaching Solutions (PLS), using the reactive electrodialysis technique, without the need of solvent extraction.
DOI: 10.1007/s42250-023-00802-4 Corpus ID: 264468249; Separation and Recovery of Copper from Ammonia Pregnant Leach Solution (PLS) by Cyanex®272 @article{Chindo2023SeparationAR, title={Separation and Recovery of Copper from Ammonia Pregnant Leach Solution (PLS) by Cyanex{textregistered}272}, …
The LIX® range of solvent extractants are applicable to leach solutions with a wide range of copper tenors, pH and impurity levels. They have been successfully used to …
An alternative copper concentrate leaching process using sodium nitrate and sulfuric acid diluted in seawater followed by gas scrubbing to recover the sodium nitrate has been evaluated.
The pregnant leach solution (PLS) was derived from cyanide leaching (1.5 g/L NaCN, 25% w/w solids ratio, 1.5 L/min air flow rate, pH 10.5-11, 24 h) of the roasted copper-rich refractory gold ore ...
Solvent extraction of valuable metals from pregnant leach solutions of cupriferous shale 367 EXPERIMENTAL The initial composition of pregnant leach solution applied for preliminary investigations of copper(II), cobalt(II) and nickel(II) recovery by means of solvent extraction is indicated in Table 1. The solution was a pregnant liquor from
The pregnant leach solution with a gold concentration of 0.46 mg/L was taken from the verification leaching experiment after filtration. It can be seen that the gold uptake from the loaded solution reached within four hours, after which the remaining gold concentration in the solution was negligible (<0.01 mg/L), while 90% of gold was ...
Heap leaching generates a pregnant leach solution (PLS) containing 1–6 g/L Cu²⁺, which is sent to solvent extraction and electrowinning for copper production.
The solvent extraction of yttrium and neodymium from copper pregnant leach solutions (PLS) using Primene JM-T, a primary aliphatic amine, has been studied. Effect of contact time, pH, sulfate concentration, and extractant concentration were investigated using synthetic and actual PLS systems. Standard experimental conditions were 5 min contact ...
The leached liquid containing the dissolved copper, known as a pregnant leach solution (PLS), is later collected and further processed to extract the copper. The liquid leachate may lead to TENORM contamination in the surrounding environment by seeping into the ground water at abandoned and active copper mining sites.
Barren vs Pregnant. The solution exiting the leaching area first arrives in a processing pond for pregnant solution. When there's still a majority of harvestable ore left in the liquid, it's considered pregnant or loaded. Some systems only call for a single set of pregnant ponds to settle or skim out ore and minerals with minimal work.
The recovery of yttrium and neodymium from copper pregnant leach solution (PLS) has been reported by Hiskey and Copp (2018). Large scale heap and stockpile leaching accounts from significant copper production. In 2015, leaching accounted for 18% of the world's primary copper production, and over 50% of the …
The results showed that it is possible to obtain a suitable pregnant leach solution (PLS) (i.e., in the range of 3 to 8 g/L of Cu) for treatment in available copper …
The hydrometallurgical process of solvent extraction/electrowinning (SX/EW) of copper production requires volumetric flow measurements for control and efficiency. Due to the characteristics of the pregnant leach solution (PLS) during the leaching process, scaling often prevents accurate measurement readings.
The resulting "pregnant" leach solution of sulfuric acid and copper sulfate is collected in a small pool. The copper compound can now be seen at concentrations of between 60-70%. The second step is solvent …
Results of use of extraction properties of modified extractants of ACCORGA series and unmodified extractant Lix984N on pregnant leached solution of the most …
A variety of solvent extraction reagents have been investigated for the recovery of copper ions from pregnant leach solutions. Oximes and b-diketone extractants have been extensively studied and applied commercially in the extraction of copper from acidic and alkaline aqueous solutions [1,2,19,21,26,31].
Therefore, 0.5 M NaCl + 0.5 M CuCl2, 1.0 M HNO3, 0.5 M H2SO4, and 1.0 M TFMS showed high extraction selectivity toward Cu and Zn with low chemical consumption, and produced pregnant leach …
This study shows the feasibility of recovering copper directly from Pregnant Leaching Solutions (PLS), using the reactive electrodialysis technique, without the need of solvent extraction. The copper PLS contained the following ion concentrations: Cu2+ 2.0–2.5 g/L; pH 1.5–1.8; 90–95 g/L; Cl− 8–10 g/L and total iron of 8–10 g/L. The copper …
The chloride is a strong leaching agent, and leach processes have been developed to leach sulfides copper ores in high chloride media. These processes add salt to the leach solution or add ...
This study shows the feasibility of recovering copper directly from Pregnant Leaching Solutions (PLS), using the reactive electrodialysis technique, without the need of solvent extraction. ... Ruiz D. 2021. Removal of chloride ions from a copper leaching solution, using electrodialysis, to improve the uranium extraction through ion-exchange. …
ABSTRACT. This study shows the feasibility of recovering copper directly from Pregnant Leaching Solutions (PLS), using the reactive electrodialysis technique, without the …
tions after the leaching process. This technology has been used in large scale for the extraction of copper from a pregnant leach solution (PLS) (Free and Moats, 2014; Schlesinger et al., 2011). Basically, in this process the valuable metal ion is transported from an aqueous into an organic phase by means of an extracting reagent or extractant ...
Konkola Copper, Chingola Leach Plant, new tank house Zambia 30 States (2001); OMG Kokkola Copper, Finland (2001); Bwana Mkubwa expan- ... pregnant leach solution (PLS) grades have been reduced over time and, subsequently, fl ow rates have increased. Additional information about SX plant
The solvent extraction of yttrium and neodymium from copper pregnant leach solutions (PLS) using Primene JM-T, a primary aliphatic amine, has been studied. Effect of contact time, pH, sulfate ...
The majority of studies aim at optimizing the conditions of atmospheric leaching, in order to maximize Ni and Co extraction, and fewer deal with the purification of pregnant leach solution (PLS), which has low concentrations of Ni (0.8–3.3 g/L) and Co (0.05–0.2 g/L) and high concentrations of
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نشانی: شماره 1688، جاده شرقی گاوک، منطقه جدید پودونگ، شانگهای، چین.
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