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Leaching of iron from copper tailings by sulfuric acid ...

Leaching of iron from copper tailings by sulfuric acid: behavior, kinetics and mechanism†. Lei Tao a, Langlang Wang a, Kanghuai Yang a, Xueqian Wang * a, Lu Chen * b and Ping Ning a a Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, PR China. E-mail: [email protected]; Tel: +86 13888183303 b Faculty of Business

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Leaching of iron from copper tailings by sulfuric acid ...

leaching behavior with respect to iron has rarely been reported. Herein, a theoretical analysis of the leaching of iron from copper tailings was performed. Then, the effects of key factors on iron leaching were investigated, including the reaction temperature, sulfuric acid concentration, ratio of solid to liquid (S/L ratio), and stirring speed.

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Leaching behavior of aluminum, copper, iron and zinc

Leaching behavior of aluminum, copper, iron and zinc from cement activated fly ash and slag stabilized soils Waste Manag. 2019 Jul 15;95:334-355. doi: 10.1016/j.wasman.2019.06.018. Epub 2019 Jun 21. Authors Masrur Mahedi 1 , Bora Cetin 2 , Asli Y Dayioglu 3 Affiliations 1 Department of Civil, Construction and Environmental Engineering, 813 ...

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Leaching behavior of aluminum, copper, iron and zinc

2019-7-15  Similar leaching behavior of SO 4 from fly ashes and soil-fly ash mixtures has also been recognized by Zhang et al. (2016). With the presence of sufficient lime (CaO), SO 4 forms insoluble ettringite and precipitates when the pH rises above 10.7 (Komonweeraket et al., 2015c).

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Leaching behavior of aluminum, copper, iron and zinc

Toxicity characteristic leaching procedure (TCLP) tests were conducted to investigate the environmental hazards associated with the leaching of aluminum (Al), copper (Cu), iron (Fe) and zinc (Zn) from fly ashes, slag, type I/II cement and cement activated fly ash and slag stabilized soils.

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Supporting information and mechanism Leaching of iron

2021-1-11  Leaching of iron from copper tailings by sulfuric acid: behavior, kinetics and mechanism Lei Taoa, Langlang Wanga, Kanghuai Yanga, Xueqian Wang a *, Lu Chen b*, Ping Ninga a. Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, PR, China b.

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Investigating the Leaching Behavior of Copper from ...

higher order (i.e. ferric iron) and can be precipitated as hematite or goethite forms by oxygen purging into leach liquor. The sulfur in the concentrate is also released due to dissolution in the leaching medium and ultimately is precipitated. Literature indicates that there are few reports on the leaching behavior of copper from a concentrate

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A study on selective leaching of heavy metals vs. iron ...

2019-4-1  Selective leaching of other metals vs. iron was shown to be possible in 0.2 M HCl, as the final pH of 2.9 indicates that iron had precipitated into the leach residue. Fig. 5 Extraction of Fe into a hydrochloric, sulfuric, oxalic, citric, and acetic acids and the measured final pH ( b ) values at T = 33 °C in the 24 h leaching tests

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Influence of Ferric and Ferrous Iron on Chemical and ...

2013-12-24  The effect of ferric and ferrous iron on the extraction of copper and iron from flotation concentrates including both primary and secondary copper sulfides has not been well studied as yet. Hence, this research was done to in-vestigate the effect of these cations on chemical and bac-terial leaching of Sarcheshmeh copper concentrate in the

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Effect of Pressure on the Behavior of Copper-, Iron-,

2005-11-2  The combustion process integrated by coal gasification and chemical-looping combustion (CLC) could be used in power plants with a low energy penalty for CO2 capture. This work analyzes the main characteristics related to the CLC process necessary to use the syngas obtained in an integrated gasification combined cycle (IGCC) power plant. The kinetics of reduction with H2 and CO and

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Investigating the Leaching Behavior of Copper from ...

higher order (i.e. ferric iron) and can be precipitated as hematite or goethite forms by oxygen purging into leach liquor. The sulfur in the concentrate is also released due to dissolution in the leaching medium and ultimately is precipitated. Literature indicates that there are few reports on the leaching behavior of copper from a concentrate

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Effect of temperature on leaching behavior of copper ...

2019-11-7  adsorbed copper existed in the form of limonite, and colloid co-precipitated copper existed in the cemented body of feldspar−quartz−copper−iron. Thus, the occurrence state of copper-bearing minerals was extremely complicated. At present, most studies focus on the leaching technology or copper leaching efficiency of

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Influence of Ferric and Ferrous Iron on Chemical and ...

2014-6-19  The effects of ferrous and ferric iron as well as redox potential on copper and iron extraction from the copper flotation concentrate of Sarcheshmeh, Kerman, Iran, were evaluated using shake flask leaching examinations. Experiments were carried out in the presence and absence of a mixed culture of moderately thermophile microorganisms at 50?C. Chemical leaching experiments were performed in ...

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The leaching and adsorption behaviour of gold ores

2020-8-28  4.3.1 The effect of copper 101 4.3.2 The role of iron 106 4.3.3 The role or nickel 107 4.3 .4 The role of silver 109 4.3.5 Theroleofzinc 109 4.4 THE EFFECT OF COPPER CYANIDE ON GOLD LEACHING FROM OXIDE AND SULPHIDE ORES 110 4.5 SUMMARY 114 CHAPTERS PREG-ROBBING PHENOMENA IN THE CYANIDATION OF GOLD ORES 116 5.1 OBJECTIVES OF THIS

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Dissolution kinetics of copper from multi-metal copper

2017-4-20  iron trioxide roasted in oxygen, was carried out. The effects of leaching time, stirring speed, sulfuric acid concentration, reaction temperature, and particle size of the multi-metal oxide on the kinetics and mechanism of copper extraction were studied.

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Removal of Metallic Impurities from Off-Grade Copper ...

2018-4-27  An off-grade copper concentrate with chalcopyrite, tennantite and molybdenum was selected as the raw material in this work to better understand the leaching behavior of metals in the alkaline leaching process. The concentrate was from Huatailong Mining Development Co. Ltd, oMzhugongka region in Tibet prov-ince, P.R. China.

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Concept for a Hydrometallurgical Processing of a

2020-3-11  After the leaching, the copper is extracted by solvent extraction. After the stripping, the sulfate solution can be partly recycled as leaching agent, while metallic copper is won by electrowinning. Next, the iron has to be removed from the process stream before further treatment.

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Leaching behavior of copper using electro-generated ...

Leaching behavior of copper using electro-generated chlorine in hydrochloric acid solution Eun-young Kim , Min-seuk Kim , Jae-chun Lee , Kyoungkeun Yoo , Jinki Jeong 0 / 0

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Sequential Precipitation of Iron, Copper, and Zinc

Sequential Precipitation of Iron, Copper, and Zinc from Wastewater for Metal Recovery ... Antimony, and Zinc by Acid and Saline Leaching. Journal of Environmental Engineering August 2014 . Effects of Iron on Chemical Sulfide Oxidation in Wastewater from Sewer Networks. ... Leaching Behavior of Lead, Chromium (III), and Zinc in Cement/Metal ...

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Effect of Cu species on leaching behavior of simulated ...

The aim of this study is to evaluate the efficiency of thermal treatment on residual copper sludge after separation treatment. The toxicity characteristic leaching procedure (TCLP) concentration, pattern distribution and possible Cu species of simulated copper sludge were analyzed. Parameters such as different reaction time and temperature are also discussed in this study.

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ALTA 2017 Nickel-Cobalt-Copper Proceedings

2019-3-15  INVESTIGATION OF THE LEACHING BEHAVIOR OF A COPPER-IRON-MOLYBDENUM ALLOY H 2SO4 306 Stephan Steinacker, Juergen Antrekowitsch, Montanuniversitaet Leben (Austria) ASSESS THE SUITABILITY OF A LOW-GRADE COPPER SULFIDE ORE FOR IN SITU RECOVERY BY MINERALOGICAL CHARACTERIZATION 314 Jian Li

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Influence of Ferric and Ferrous Iron on Chemical and ...

2014-6-19  The effects of ferrous and ferric iron as well as redox potential on copper and iron extraction from the copper flotation concentrate of Sarcheshmeh, Kerman, Iran, were evaluated using shake flask leaching examinations. Experiments were carried out in the presence and absence of a mixed culture of moderately thermophile microorganisms at 50?C. Chemical leaching experiments were performed in ...

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Copper leaching, solvent extraction, and

1999-7-1  The Bureau conducted bench-scale research on a process for treating cobaltite concentrates, comprising (1) oxidative pressure leaching, (2) jarosite precipitation followed by H/sub 2/O/sub 2/ oxidation and pH control to remove iron and arsenic, (3) copper solvent extraction with a mixed hydroxyoxime-amine extractant, (4) copper electrowinning from recirculating acidic strip liquor, (5 ...

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Sequential Precipitation of Iron, Copper, and Zinc

Sequential Precipitation of Iron, Copper, and Zinc from Wastewater for Metal Recovery ... Antimony, and Zinc by Acid and Saline Leaching. Journal of Environmental Engineering August 2014 . Effects of Iron on Chemical Sulfide Oxidation in Wastewater from Sewer Networks. ... Leaching Behavior of Lead, Chromium (III), and Zinc in Cement/Metal ...

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Concept for a Hydrometallurgical Processing of a

2020-3-11  After the leaching, the copper is extracted by solvent extraction. After the stripping, the sulfate solution can be partly recycled as leaching agent, while metallic copper is won by electrowinning. Next, the iron has to be removed from the process stream before further treatment.

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SEPARATION OF COPPER FROM A LEACHING

The results showed that the leaching obtained around 60% aluminum, 94% copper, 76% zinc, 50% nickel and residual iron from the non-magnetic fraction of PCBs. With the solvent experiments, in the first stage, 100 wt.% zinc, iron and aluminum were extracted at pH 3.5, 2:1 A/O, 10 % (v/v) D2EHPA, while, in the second stage 100% of the copper was ...

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Electrodeposition of Iron in HNO3 Solution

2019-12-1  Reduced iron-based alloy included 98.1 wt% iron, 1.75 wt% copper, 0.045 wt% silicon, and other minor elements. Four different acid solutions of H 2 SO 4 (6.76 M), HNO 3 (6.82 M), HCl (13.52 M), and HCl (11.76 M)/HNO 3 (0.45 M) were prepared to study the efficiency of iron leaching from iron-based alloy. The efficiency change of iron leaching ...

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Efficient Synchronous Extraction of Nickel, Copper,

2020-6-18  Firstly, the effect of roasting temperature on the extractions efficiency of nickel, copper, cobalt, and iron was studied, the results were shown in Fig. 3a,b. the Fig. 3a exhibits the leaching ...

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Leaching of Copper from Cuprous Oxide in Aerated

The leaching behavior of copper from Cu 2O in H 2SO 4 solution was investigated to establish the leaching process for cathode powders produced by the recycling of waste printed circuit boards. When air was not introduced in sulfuric acid solution, the dissolution of copper from Cu 2O was inhibited by the formation of elemental copper (Cu0).

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南方科技大学环境科学与工程学院 - 南方科技大学环境 ...

Shih, K.; Tang, Y. Leaching Behavior and Stabilization Mechanisms of Nickel and Copper in Ceramic Matrix. Presented at The 247th American Chemical Society (ACS) National Meeting, Dallas, 16

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