Separation of Manganese from Iron in the $$hbox {SO}_{2
— Manganese (Mn) extraction from iron-rich pyrolusite ore with cheap sulphur dioxide is considered to be the most promising method with advantages of rapid leaching rate and high leaching efficiency. Nevertheless, co-dissolution of iron (Fe) with manganese has limited the development of its commercial practice. In this work, the separation …
Extraction of copper from an oxidized (lateritic) ore using …
— The total amount of copper bioleached from the lateritic ore by reductive dissolution was 78 % (based on the copper content of the laterite from aqua regia dissolution). ... Johnson DB, Grail BM, Hallberg KB (2013) A new direction for biomining: extraction of metals by reductive dissolution of oxidized ores. Minerals 3:49–58.
Incongruent dissolution of silicates and its impact on the …
— The paper analyzes the process of incongruent dissolution of silicates taking place in close proximity to a talc mine. The chemical and phase composition as well as the concentrations and mobility ...
Arsenic removal strategy in the processing of an …
— In this study, an additional stage in the processing of an arsenopyritic refractory gold ore was studied. Arsenic extraction in an alkaline pretreatment was …
Evaluation on liquefaction effect of potassium …
Evaluation on liquefaction eect of potassium dissolution extraction from low‑grade solid potash ore in Qarhan Salt Lake, northern of Tibetan Plateau Yachao Song1 · Han Hu1 · Chuanyong Ye2 · Yuanyi Zhao 2 · Lichun Ma2 · Juan Zhang3 · Qunxiong Yan3 · Yuhan Lin 3 Accepted: 18 March 2024 / Published online: 20 April 2024
Kinetic Investigation and Dissolution Behavior of Cyanide Alternative
— Iodine is capable to extract gold a very fast (average dissolution rate of 65.679 mg·h −1 ·cm ... F. & Wuth, W. Silver extraction from a refractory type ore by thiourea leaching ...
Bioleaching of Lateritic Nickel Ores
Mohapatra et al., also examined the effect of laterite ore in various forms such as raw ore, calcined ore, and calcined ore and then soaked in dilute sulfuric acid, before bacterial dissolution. The results of this study showed that the highest percentage of nickel extraction with calcined ore at 600 °C for 31 days was obtained at a pH of 1.5 ...
Lithium extraction from hard rock lithium ores (spodumene, …
— Then their further analysis showed that temperature and reaction time are the main factors affecting the dissolution of lithium minerals ... Taking global warming potential as an example, the intensity of lithium extraction from ore is 15.69 tCO 2eq /t, 47.7 times that from brine (0.33 tCO 2eq /t) (Jiang SY et al., 2020).
The effects of dissolved oxygen and cyanide dosage on gold extraction …
— The plant processes a blend ratio of up to 1:1 of underground sulphide ore and open pit ore at a rate of 115 tph. The gravity circuit recovers the fine free gold (P 80 ≈75 μm), 10–20% of the total amount of gold inputted into the plant, to produce a gravity concentrate with a fine gold purity of between 75% and 80%.Fig. 1 illustrates the …
Selective extraction performance of Ni, Cu, Co, and Mn …
— The metal extraction efficiency for the coupled leaching test was calculated based on the amount of the leached metal in the residue with concern to the original input quantity. The dissolution ratio of Fe for the single ore leaching test was calculated using the iron ion increment in the leached solution referred to as that of the initial ...
Simulation study on the mining conditions of dissolution of …
— The effect of solvent chemistry on potassium dissolution extraction from low-grade solid potash ore in Qarhan Salt Lake, China. Appl. Geochem. 115, 1–11 (2020).
Leaching kinetics and predictive models for elements extraction …
— The effect of time on the leaching of copper oxide ore was investigated at room temperature in the range of 15–240 min. The results are shown in Fig. 1 which indicates that the increase of time on the dissolution of copper oxide ore produced an increase in the dissolution of copper, cobalt and iron. However, it was noticed that the …
Optimization process of refractory gold ore extraction by …
Refractory gold ore contains sulfide minerals like pyrite, chalcopyrite and sphalerite that are difficult to be directly leached by cyanidation or by lixiviants such as thiourea and halides. ... reported that the gold dissolution rate in hypochlorite solution was higher than in the cyanidation process, due to the presence of hypochlorous acid ...
Dissolution of natural serpentinite in mineral and organic …
— Abundant resources of magnesium silicates make an interesting prospect for long-term storage of CO 2 by mineral carbonation. Several carbonation processes proposed in literature for CO 2 storage employ extraction of silicate minerals using a liquid solvent. In this study, the dissolution of natural serpentinite in respective solutions of acids, bases …
Optimization Process of the Refractory Gold Ore Extraction …
— This assumption was supported by observing 72% extraction of gold from ore into the solution in the CIL-1 test, while longer retention time (36 h) enhanced the …
Oxidative Dissolution of Metals in Organic Solvents
— Dissolution of metals in organic solvents is relevant to various application fields, such as metal extraction from ores or secondary resources, surface etching or polishing of metals, direct synthesis of …
Fe Migration and its Influence on the Oxidative Leaching of …
— For the low-grade Ni–Cu–Fe-bearing sulfide ore dissolution tests, (Fe 3+)-containing and (Fe 3+)-free oxidative leaching solutions were prepared.To prepare the initial solutions, sodium ion (Na +) or magnesium ion (Mg 2+) was added to the Fe 3+-containing dilute sulfuric acidic solutions.A fixed mass of Fe 2 (SO 4) 3, Na 2 SO 4, and/or MgSO 4 …
Review Sustainable rehabilitation of mining waste and acid …
— There is a huge variety of wastes and chemical elements therein depending on the numerous techniques of ore extraction (Changul et al., 2010). Therefore, it is important to incorporate the detailed information about the ore extraction processes in the remediation plan (Fig. 1). 5.7. Rehabilitation considering climate and hydrology
Optimization of Gold Dissolution Parameters in …
— Thiourea (Tu) leaching of gold is an alternative lixiviant for treating sulfide gold ores and concentrates. The present study investigated the leaching behavior of Au from sulfide gold ore concentrates obtained …
The effect of solvent chemistry on potassium dissolution extraction
Qarhan Salt Lake contains approximately 296 million tonnes of low-grade solid potash ores. The exploitation and utilization of this low-grade solid potash ore represents the fundamental framework for the sustainable development of Qarhan Salt Lake's potash fertilizer industry. It also alleviates the shortage of potash resources of China. In this …
Leaching of Gold from an Oxide Gold Ore with …
— A considerable gold extraction of 90.42% was obtained under the optimized conditions of 0.1 mol/L CuSO4, 0.2 mol/L Na2L, 0.3 mol/L Na2S2O3, pH 11.0, and 75°C after 16 h of leaching. The process of gold dissolution in copper–tartrate–thiosulfate solutions may be controlled by product layer diffusion under the experimental conditions …
Gold Dissolution from Ore with Iodide-Oxidising Bacteria
— Gold leaching from ore using iodide-iodine mixtures is an alternative to gold cyanidation. This study evaluated the ability of iodide-oxidising bacteria to solubilise gold from ore that was mainly ...
Extracting Copper by Lactic Acid from Copper Oxide Ore and Dissolution …
DOI: 10.1252/JCEJ.14WE032 Corpus ID: 94625555; Extracting Copper by Lactic Acid from Copper Oxide Ore and Dissolution Kinetics @article{Deng2015ExtractingCB, title={Extracting Copper by Lactic Acid from Copper Oxide Ore and Dissolution Kinetics}, author={Jiushuai Deng and Shuming Wen and Jian-ying Deng and Dandan Wu and Jing …
Extracting copper from copper oxide ore by a zwitterionic
— Sulfamic acid (SA), which possesses a zwitterionic structure, was applied as a leaching reagent for the first time for extracting copper from copper oxide ore. The effects of reaction time, temperature, particle size, reagent concentration, and stirring speed on this leaching were studied. The dissolution kinetics of malachite was illustrated with a three …
An overview on recent separation and purification strategies …
— Some studies have leant over the literature to review dissolution strategies, the chemistry of Nb and Ta compounds, and solvent extraction works towards the recovery of Nb and Ta from their mineral sources (Agulyanski, 2004, Nguyen and Lee, 2019, Nzeh et al., 2022, Shikika et al., 2020, Zhu and Cheng, 2011). Even though, there is a lack of ...
Water Leaching Kinetics of Boron from the Alkali-Activated Ludwigite Ore
— The primary aim of this study was to investigate the boron leaching process from alkali-activated ludwigite ore. Initially, the ore underwent activation through roasting at 1050 °C for 60 min with 20% sodium carbonate. Subsequently, the study examined the influence of leaching parameters, including temperature, time, liquid-to-solid ratio, and …
Nickel extraction from low grade laterite by agitation leaching …
— This research work deals with the extraction of nickel from a low grade nickel laterite ore, taken from a deposit located in southwestern of Iran, through agitation leaching at atmospheric pressure. The assaying and mineralogical studies carried out on the nickel laterite sample, showed the 0.88% Ni, and principally consisted of oxide and ...
Review of gold leaching in thiosulfate-based solutions
— For a limonite- bearing gold ore, as high as 94.3% of gold extraction was achieved and the consumption of thiosulfate merely achieved at 1.12 kg/t under the conditions of 0.1 mol/L Na2S2O3, 0.06 mol/L EDA, 0.005 mol/L CuSO4, and 1.5 kg/t CTAB (cetyltrimethyl ammonium bromide).
Microbial leaching for valuable metals harvesting: versatility …
— Microbial leaching process offers a likelihood to get hold of metals from low grade mineral resources where metals are made to undergo dissolution from their mineral sources with the help of certain naturally occurring micro-organisms which cause the transformation of elements so as to make the elements available for extraction from a …
Factors and challenges in the recovery of niobium and …
— Thus, for successful extractions, the impurity content in the oxide mineral ore and choice of extraction method and/or extraction agents are key [11]. ... dissolution and extraction techniques suitable for complex Nb-Ta mineral ore matrices or concentrates largely depend on certain factors. Apart from the physicochemical properties, such as ...
Dissolution Kinetics of Copper from Low-Grade Goldfieldite ore …
— In recent times, almost 25% of global copper obtained by leaching-cum-solvent extraction routes is considered profitable for the manufacturing of high-quality cathode material. The dissolution kinetics of copper from low-grade goldfieldite ore was examined in ammonia–ammonium sulfate media. In this study, the influences of leachant …
Dissolution kinetics of dehydroxylated nickeliferous goethite …
— 1.. IntroductionThe increased demand for nickel has depleted the more easily extractable Ni sulphide deposits, which account for ~. 30% of the world's Ni resource, and has caused the mining industry to look towards acid extraction of lateritic nickel (accounting for ~ 70% of the world's Ni resource). Difficulties in the extraction of Ni from lateritic …
Gold Extraction from a Refractory Sulfide …
— Most gold deposits occur associated with sulphides like pyrite and arsenopyrite; thus, precious metal dissolution is possible by oxidizing auriferous sulfide concentrate using simultaneous pressure …
Leaching kinetics and predictive models for elements extraction …
— The results are shown in Fig. 1 which indicates that the increase of time on the dissolution of copper oxide ore produced an increase in the dissolution of copper, cobalt and iron. However, it was noticed that the copper leaching began to reach equilibrium state at 60 min so is iron leaching whilst at the same equilibrium time interval cobalt ...
Simulation of Simultaneous Leaching of Copper and Cobalt …
— The dissolution of cobalt from asbolane was promoted by increasing sulfuric acid mass flow rate, while the extraction of cobalt contained in heterogenite highly depended on sodium metabisulfite (Na2S2O5) mass flow rate. ... The sensitivity analysis results of leaching temperature on the dissolution of copper and cobalt ore are shown in …