المنتجات الساخنة
Enhancement of copper recovery by acid leaching of high-mud copper
网页2018年11月20日 Acid consumption is another area of concern due to the high consumption of 18–20 tons of acid per ton of copper at YCM, which corresponds to 34% of the overall production cost, and high acid consumption also leads to mineral dissolution and
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Leaching of copper oxide with different acid solutions
网页2009年10月15日 The effect of temperature on the rate of copper dissolution from CuO when leached in the three inorganic acids was investigated over a temperature range of
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Minerals Free Full-Text Acid-Gangue
网页2018年1月29日 Heap leaching accounts for a fifth of global copper production, sourced primarily from porphyry ores, yet metal recoveries
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How copper dump leaching works ScienceDirect
网页2021年9月1日 The test samples contained between 0.33% and 0.35% soluble Cu, and between 0.36% and 0.38% total Cu. Soluble Cu is defined as that portion of copper that
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Sulfuric acid leaching for capturing value from copper rich
网页2019年4月1日 The aim of the work was to recover copper at optimal leaching parameters from copper rich slag. Optimal leaching conditions for higher copper recovery (ca. 100%)
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Acid Leaching Copper Ore Treatment Method
网页2017年5月23日 Acid Leaching Copper Ore Treatment Method. The treatment of copper ores, both oxides and sulfides by means of flotation, hydrometallurgy or other processes has been well established for many
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Acid leaching of a copper ore by sulphur-oxidizing microorganisms
网页2014年8月1日 Abstract. This study examines the potential for use of biogenic sulphuric acid for leaching of a low-grade Brazilian ore containing 0.64% copper occurring as
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Copper sulfides leaching assisted by acidic seawater-based
网页2022年1月1日 The copper leaching became obviously slow when the 70 ∼ 80% copper sulfides was extracted. This is because there are passivation layers like the elemental
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Selective Recovery of Copper from Acid Leaching Solution
网页2022年12月7日 A new kind of sulfide precipitant, namely, slow release sulfide precipitant (SRSP), was developed and prepared first to realize the selective recovery of copper
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Leaching of copper oxide with different acid solutions
网页2009年10月15日 Copper oxide can also be dissolved by a weak acid such as citric acid: 3CuO + 2C6H8O7 → Cu3(C6H5O7)2 + 3H2O. This article presents the results on
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Leaching of Metals from e-Waste: From Its Thermodynamic
网页The leaching process of copper, lead, and silver was successfully implemented by its design based on a thermodynamic study that deduced its optimal parameters, pH below 2.5 and potentials greater than 0.6 V vs NHE, for the efficient leaching in nitric acid media, 2 mol dm –3 HNO 3. Carrying out the thermodynamic study and monitoring and
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LixTRA™ Novel Copper Leach Technology BASF
网页2021年11月3日 LixTRA™ Copper Leach Technology now offers the industry its first leaching additive that is compatible with the entire Leach à SX EW process. History Heap leaching copper from oxide and secondary sulfide ores has been practiced commercially since the late 1960’s. This methodology is mostly used for low-grade ores and involves
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LEACHING OF LOW-GRADE COPPER ORES: A CASE
网页2017年6月9日 Serbia (the approximate Cu content in the ore ranges from 0.2 0.3 % with >10 % copper in the form of oxide minerals). The leaching experiments were performed using sulphuric acid solutions, whereby the kinetics of copper leaching was investigated with respect to acid concentration and solid to liquid ratio. The copper concentration in
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Leaching of iron from copper tailings by sulfuric
网页2.2. Instruments and procedure Fig. 1 shows the set-up used to study the leaching process of copper tailings. The experiments were performed according to the following procedure. First, 200 mL of the leaching agent
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Decopperization mechanism of copper anode slime
网页2021年11月1日 Seisko et al. [ 15] investigated the pressure leaching of the copper anode slime and found that copper 65–100%, nickel 57–98%, bismuth 53–82%, arsenic 16–61%, tellurium ≤58% and selenium ≤57% were leached when the temperature was in the range of 80–120 °C. Under O2, the leaching rate of copper is only 41.1% at 90 °C.
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Ammoniacal Solvoleaching of Copper from High-Grade Chrysocolla
网页2020年10月7日 The copper silicate ore chrysocolla forms a large potential copper resource, which has not yet been fully exploited, due to difficulties associated with its beneficiation by flotation and metallurgical processing. Direct acid leaching of chrysocolla causes silica gel formation. Therefore, in this work, the feasibility of solvometallurgical
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A reviewofcopperhydrometallurgy SAIMM
网页2009年8月26日 breakthrough in copper hydro-metallurgy sincethat achieved by Sherritt Gordon intheir success-ful development of pressure-leaching techniques. (c)Many ofthe basic chemicals re-quired for hydrometallurgical processes are produced in large tonnages at low prices (e.g., oxygen, ammonia, chlorine, hy-drochloric acid). Of course, if
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Effective Recovery Process of Copper from Waste Printed
网页2020年12月21日 This study presents an optimized leaching and electrowinning process for the recovery of copper from waste printed circuit boards including studies of chemical consumption and recirculation of leachate. Optimization of leaching was performed using response surface methodology in diluted sulfuric acid and hydrogen peroxide media.
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Copper Leaching Method 911 Metallurgist
网页2019年4月19日 Extraction of copper from suitable ore by leaching methods is generally assumed to cost less than the combined expense of concentration, smelting, and refining, and experimental data tend to confirm this opinion. At the Butte-Duluth plant, which is handling in excess of 100 tons of oxidized ore daily, the copper is said to cost $0.085 per
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Extraction of uranium and copper from acid leached solid
网页2022年8月24日 A solid waste sample from acidic leaching of Alluoga sedimentary rocks, SW Sinai, Egypt, was processed for leaching and extraction of U and Cu respectively. This sample assayed 200 mg/kg U and 5 g/kg Cu. The present work aims to obtain solid waste free of U and Cu through selective alkaline leaching for uranium followed by
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Acid leaching of a copper ore by sulphur-oxidizing microorganisms
网页2014年8月1日 Abstract. This study examines the potential for use of biogenic sulphuric acid for leaching of a low-grade Brazilian ore containing 0.64% copper occurring as brochantite, Cu4 SO 4 (OH) 6, and as malachite, Cu2 CO 3 (OH) 2. Ore was agglomerated with elemental sulphur and sulphur-oxidizing microorganisms. Copper extraction was
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Copper Mineral Leaching Mathematical Models—A Review
网页At an industrial scale, the main efforts have focused on the acid leaching of copper oxides, uranium minerals and cyanide leaching of gold minerals, and lately, leaching copper sulfide minerals by H 2 SO 4 + chlorides. The mineral leaching process was developed by many authors, modeling the process mainly applied on an industrial scale of
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Copper Mineral Leaching Mathematical Models A Review
网页2022年3月7日 Heap leaching mainly requires size reduction in order to maximize the leaching minerals interaction and the placement of an impermeable base to prevent leaching loss and the contamination of water bodies [8]. The heap leaching process came into use in the mid-20th century, when the former U.S. Bureau of Mines developed heap leaching
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Gangues and Clays Minerals as Rate-Limiting Factors in Copper
网页2021年9月27日 Acid curing is performed before heap leaching to accelerate the reaction with copper ores through concentrated H 2 SO 4. However, a critical consequence for gangue ores is that the strong acid dehydrates the polymeric silica in the gangue, inhibiting further gangue reaction and, thus, silica dissolution, under heap leaching conditions [ 66,
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Copper Mining and Processing: Processing Copper
网页1 天前 The leaching reagent (dilute sulfuric acid) is sprayed through sprinklers on top of the heap pile and allowed to trickle down through the heap, where it dissolves the copper from the ore. The resulting
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Investigation on leaching of malachite by citric acid
网页2012年9月7日 Leaching of an oxidized copper ore containing malachite, as a new approach, was investigated by an organic reagent, citric acid. Sulfuric acid is the most common reagent in the leaching of oxide copper ores, but it has several side effects such as severe adverse impact on the environment. In this investigation, the effects of particle
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In situ leaching of copper: Challenges and future prospects
网页2015年10月1日 In the leaching test conducted using sulfuric acid in the seawater-based media and in the presence of sodium chloride and cupric chloride, the maximum copper recovery of 34.2% obtained. In all of the different designed leaching approaches, the highest copper extraction was obtained in the tests performed with addition of the cupric ions (Cu
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Leaching of Copper Ores: Effects of Operating
网页2020年8月6日 A maximum copper dissolution of about 87 % can be recovered at a leaching temperature of 45 oC, 462 m particle size, 0.2 N hydrochloric acid, 1.0 g/L solid to liquid ratio, and 1000 rpm stirring
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Optimization of sulfuric acid leaching of roasted chalcopyrite
网页2020年8月26日 Chalcopyrite (CuFeS2) is commonly used ore in production of copper, but leaching of this ore is very slow and inefficient due to “passivation” during leaching at atmospheric conditions. In this study, in order to overcome drawbacks of the passivation layers, the concentrate supplied from Eti Bakır A.Ş. Küre Plant in Turkey was roasted at
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