آخرین محصولات
Automating and Optimizing Copper Heap Leaching …
One miner turned to the Emerson team for a solution to improve the overall efficiency of this leaching process. They needed movable, modular skids that two technicians could lift and move around …
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Soil washing remediation of heavy metal from
These conditions may reflect the different reactions of the two materials in the leaching process, and the different ways in which the heavy metals bind to the soil. ... It is worth noting that the interactions between concentration and time, and between time and pH, were weak only when leaching Zn. Therefore, when optimizing the conditions of ...
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Development of vein graphite by optimizing the NaOH
Various NaOH concentrations were tested for optimizing the purifying efficiency of vein graphite, which had already been treated with HCl acid leaching. ... By utilizing that finding, the HCl acid leaching process performed under the present study resulted 99.2% of purity with 68.0% of impurity removal efficiency. The phase analysis …
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Application of Machine Learning in a Mineral Leaching Process…
In this study, several machine learning models were used to analyze the process variables of electric-field-enhanced pyrolusite leaching and predict the leaching rate of manganese, and the applicability of those models in the leaching process of hydrometallurgy was compared. It showed that there was no correlation between the six leaching conditions; …
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Optimization of iron and aluminum recovery in bauxite
Recovering iron and aluminum efficiently is the key route to utilize low-grade high-iron bauxite. Aiming to optimize the iron separating process and elevate both Fe and Al recovery ratio, three different Fe–Al recovery processes with different magnetic roasting (R), Bayer leaching process (L) and magnetic separation (S) orders were investigated. …
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Copper smelter slag treatment by ammonia solution: …
Leaching process optimization R. Nadirov1, L. Syzdykova2, A. Zhussupova 2 1. Department of General and Inorganic Chemistry, al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan; 2 ...
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Optimization control of hydrometallurgical leaching process based on
The optimization control problem of hydrometallurgical leaching process is studied. First, the dynamic model of leaching process is built. Then, the optimization model with economic benefit as the objective is constructed, and an improved particle swarm optimization algorithm is used to solve the optimization setting problem.
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Optimization Process of the Refractory Gold Ore Extraction by
Hypochlorite leaching system is a strong oxidizing solution for metal sulfides, which are naturally associated with gold extraction. This study evaluated the hypochlorite leaching of refractory gold ore by using the response surface method–central composite design (RSM-CCD) as a statistical approach in determining the optimum condition of …
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Copper smelter slag treatment by ammonia solution: …
Abstract and Figures. The feasibility of copper smelter slag processing by ammonia solution treatment was investigated. The central composite rotatable design (CCRD) and approximation method were ...
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Changes in Modes of Operation and Discrete
of size and time, and that di erent phenomena participate in the leaching process. On the other hand, Mellado et al. [31] incorporated the di erent scales in an analytical model of the leaching process, introducing the parameters K and K˝, related to size and time, respectively, as can be seen in Equation (3): R (t) = Z + h 1– eK (t!)– 1 ...
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Process Optimization and Kinetics of Titanium Leaching from
Therefore, this study investigated the effects of the leaching temperature, leaching time, stirring strength, hydrochloric acid solution mass fraction, and liquid-to-solid ratio (volume:mass) on the titanium leaching rate to optimize the hydrochloric acid leaching process of titanium from mechanically activated titanium-bearing blast furnace …
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How to Optimize Flotation and Leaching in Mineral Processing
Leaching is a process of dissolving minerals from the ore by using a solvent, usually an acid or a base. ... To optimize the leaching process and improve the quality and recovery of the products ...
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Optimizing Leaching Conditions for Hydrometallurgy
The first step in optimizing leaching conditions is to understand the ore characteristics, such as mineralogy, particle size, grade, and gangue composition. These …
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Optimizing the Leaching Parameters and Studying the Kinetics of …
The study of copper (Cu) recovery is crucial for the entire recovery process of waste printed circuit boards (WPCBs), and Cu can be leached efficiently via a sulfuric acid–hydrogen peroxide (H 2 SO 4 –H 2 O 2) system.To achieve high Cu recovery, it is important to evaluate the parameters of the leaching process and understand the Cu leaching kinetics.
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Optimization control of hydrometallurgical leaching process …
Taking the optimization results as the control objective, a model predictive control method based on an improved differential evolution algorithm is proposed to control the leaching process, so as ...
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Leaching of Metals from e-Waste: From Its Thermodynamic …
The aim of this study is to design and develop an efficient leaching process based on a fundamental and theoretical thermodynamic analysis and the optimization of the …
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Low-Grade Phosphate Tailings Beneficiation via Organic …
after leaching optimization of low-grade phosphate ore with a P2O5 content of 17.45% using Lactic and Acetic acid, the following optimum conditions were maintained: 11% of Lactic Acid, at a temperature of 55 C for a 120 min leaching period, and 5% of Acetic acid, at a temperature of 40 C for a 30 min leaching period. A concentrate of P
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Evaluation of ozone as an efficient and sustainable reagent for
However, the role of EG in the leaching process is still not clearly understood, which limits optimization and industrial scale-up. For this reason, in this investigation, an electrochemical study was undertaken, using both a solid chalcopyrite (SE-Cp) electrode coupled to a rotating disk, as well as a chalcopyrite concentrate carbon …
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Eco-friendly recovery of base and precious metals from waste …
The new glycine 2 route had the second lowest impact in almost every category, which reflects its extraordinary potential as a green replacement for the cyanide leaching approach. More in-depth optimization of the glycine process for the copper leaching at a faster rate with higher solid content would further reduce its footprint.
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Evaluation of ozone as an efficient and sustainable reagent for
Chalcopyrite is the main copper-bearing ore and is refractory to oxidative leaching. There are many investigations about optimization of copper extraction from this mineral but most of them are ...
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Leaching Process of Weathered Crust Elution-Deposited Rare …
To strengthen the rare earth leaching process and weaken the hydration of clay minerals for preventing landslides, it is of great importance to adopt a green and sustainable leaching agent in the industry. In this work, the leaching process of weathered crust elution-deposited rare earth ores with formate salts (ammonium …
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A review on the negative impact of different elements during
Control experiments performed with only peroxide confirm that this oxidant is involved in the first stage of the dissolution process. The leaching process leads to copper and iron dissolution (15% ...
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Ammonia leaching process for selective extraction of nickel and …
The nitric acid pressure leaching process employs nitric acid instead of sulfuric acid as the leaching medium to pressure leach limonite laterite ore, accomplishing the selective leaching of nickel, cobalt, and iron [17]. ... To optimize the process flow, this paper proposes a combination of the nitric acid pressure leaching and neutralization ...
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Application of Machine Learning in a Mineral Leaching Process…
2.1.1. Dataset . The experimental data of electric-field-enhanced pyrolusite leaching were from the published papers in 2015 4 and 2017, 5 with 304 sets of data samples. The liquid–solid ratio (mL/g), current density (A/m 2), leaching temperature (°C), and leaching time (min) are the same conditions in both datasets, while the remaining …
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Optimization control of hydrometallurgical leaching process …
The utilization rate of raw materials during the hydrometallurgical leaching process has a great influence on the whole economic benefits of the hydrometallurgy …
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Process optimization for acidic leaching of rare earth
The parameters used to optimize the conditions for leaching were as follows: acid type (HCl, HNO 3, and aqua regia), particle size, and waste-to-acid ratio. The …
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Improvements in gold ore cyanidation by pre-oxidation with …
Section snippets Survey of process parameters before the H 2 O 2 pre-oxidation trial. For a period of 5 days the ore that feeds the leaching circuit was sampled and characterized for mineralogical composition and tested for the determination of the oxygen uptake rate.In addition, measurements of dissolved oxygen (DO) and free …
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Research on the Optimization and Application of the Washing
In this paper, the fly ash cyclic gradient washing dechlorination process is systematically studied through experiments, and the effects of process parameters such as liquid–solid ratio, the number of leaching, and process pulping on the dechlorination effect of fly ash are investigated and analyzed with the currently operating three-stage counter …
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Eco-friendly recovery of base and precious metals from
The results of leaching kinetics show that the leaching process is controlled by interfacial chemical reactions, and the activation energy of Co and Li is respectively 78.57 kJ mol⁻¹ and 56.20 ...
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Optimal design and planning of heap leaching process.
This work presents a methodology for the design and planning of heap leaching systems to optimize the process. This methodology consists of the creation of …
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