آخرین محصولات
extraction of copper by leaching
Copper extraction from electronic scraps by an oxidative . show that the copper in electronic scrap was oxidised to Cu2+. The copper leaching rate was definitely influenced by the oxidant agent used. The copper‐bearing leachate can be purified and concentrated by solvent extraction processes and be used either as raw material for producing.
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Efficient Synchronous Extraction of Nickel, Copper, and ...
Synchronous extractions of nickel, copper, and cobalt by selective chlorinating roasting and water leaching to low–grade nickel–copper matte. Separation and Purification Technology 195, …
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Pressure oxidative leaching of copper cake from nickel ...
T1 - Pressure oxidative leaching of copper cake from nickel refining plant in sulfuric acid media. AU - Kritskii, A. V. AU - Jafari, S. AU - Sinisalo, P. AU - Lundströ, M. N1 - Funding Information: of the solid residue was 20–25%. High-temperature POX (190 oC) allowed to extract more than 98% Cu in 60–80 min; mass output of the solid ...
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Features of pressure oxidative leaching of substandard ...
T1 - Features of pressure oxidative leaching of substandard copper-zinc sulfide concentrates. AU - Shakhalov, A. A. AU - Ospanov, E. A. AU - Naboychenko, S. S. AU - Fomenko, I. V. PY - 2019/1/1. Y1 - 2019/1/1. KW - Copper. KW - Hydrometallurgy. KW - Laboratory tests. KW - POX pilot plant. KW - Pressure leaching. KW - Pressure oxidation. KW ...
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RECOVERY OF COPPER FROM COPPER SLAG AND COPPER …
Recovery of copper from copper slag and copper slag flotation tailings 75by oxidative leaching Table 1. Chemical compositions of the copper smelter slag and the slag flotation tailings Constituent Content (wt.%) Copper Slag Slag Flotation Tailings Cu – total 0.97 0.59 Cu – oxides 0.15 0.06 Cu – sulphides 0.82 0.53 SiO 2 33.75 34.62 Al 2 O
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Copper Leaching Method
A siliceous oxidized copper ore carrying from 1.5 to 2.0 per cent, metal may be profitably leached under favorable conditions; there are no other metallurgical means known for commercially handling ore of that character and grade. Copper Leaching Practices For centuries small amounts of copper have been recovered from acid mine-drainage waters.
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Copper Pressure Leaching Process - Outotec
Copper pressure leaching process consists of the following main steps: Concentrate repulping. Pressure oxidation of sulfides. Hot curing. Solid-liquid separation. Neutralization. Copper solvent extraction. Copper electrowinning. Water balance management and bleed treatment.
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Effect of Ultrasound on the Oxidative Copper Leaching …
The objective of this study is to compare the reaction kinetics of copper leaching from chalcopyrite in acidic ferric sulfate media with (UAL) and without (non-UAL) ultrasound assistance. Four leaching parameters were evaluated and optimized. The parameter …
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Copper heap leach development – not as easy as it looks ...
Leachable copper is the true head grade for heap leaching, and the orebody should be modelled accordingly. Select the appropriate leachable copper assay procedure. Better to …
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(PDF) A STUDY OF LEACHING OF COPPER OXIDE ORE BY SULPHURIC ...
A required amount of 75 g/L. sulphuric acid solution was used and 5 g of the ground copper oxide ore with a solid to liquid. ratio of 13%. Leaching parameters such as leaching time from 0.25 – 4 ...
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(PDF) Acid leaching of a copper ore by sulphur-oxidizing ...
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, Cu 4 SO 4 (OH) 6, and as malachite, Cu 2 CO 3 (OH) 2. Ore was agglomerated with
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(PDF) Leaching of copper oxide with different acid …
Both citric acid and HCl have shown more than 75% recovery of copper and metals like Ag, Al, Pb, Ni, and Fe in the leaching solution in 4 h and 24 h, respectively, at 28ºC. Similarly, leaching ...
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Copper Leaching Method
Copper Leaching Practices. For centuries small amounts of copper have been recovered from acid mine-drainage waters. In recent years, the expansion of copper-bearing waste dump leaching for copper recovery has established a technological basis that is rapidly converting the art of copper leaching into a science.
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Enhanced effect of biochar on leaching vanadium and copper ...
Among the many extraction technologies for recovering metal resources from tailings, bioleaching technology is gradually showing its momentum. In our research, the enhanced effect of biochar on the bioleaching of stone coal tailings by Thiobacillus ferrooxidans (T. ferrooxidans) has been explored. In the static bioleaching experiment for 10 days, the leaching rate of vanadium (V) and copper ...
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leaching process for copper mining
Leaching copper tailings. case for testing the possibility of leaching the copper tailings. The ore used,was a low grade copper tailing. The are is highly si1icous, which fact is favorable to leaching, as the Si02 does not interfere with the re actions between the copper …
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Corrosion and Leaching of Copper Tubing Exposed to ...
The leaching of lead and copper from plumbing materials is a source of metals in drinking water and is a public health concern. This work investigated the influence of free chlorine (HOCl/OCl-) on the level of copper in water in contact with the solid metal, and proposed an oxidation-dissolution mechanism to explain copper leaching.Experimental results are presented for the leaching of copper ...
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Bioleaching: Introduction, Methods, Application, Copper ...
Apart from containing copper, the ores also contain other elements like iron, zinc and sulphur. For example – Chalcopyrite contains 26% copper, 25.9% iron, 20.5% zinc and 33% sulphur. Mechanism of Copper Leaching: During the oxidation of Chalcopyrite the following reaction occurs: 2CuFeS 2 + 8 ½ O 2 + H 2 SO 4 → 2 CuSO 4 + Fe 2 (SO 4) 3 ...
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KINETIC INVESTIGATIONS OF OXIDATIVE ROASTINGAND …
Kinetic investigations of oxidative roasting and afterwards leaching of Cu-Pb matte J. Min. Met. 40B (1) (2004) 65 3.3. Calculation of kinetic parameters for the process of oxidative roasting of copper-lead matte Oxidative roasting was performed by introducing …
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Effect of Ultrasound on the Oxidative Copper Leaching …
At 0.1% S/L, the UAL leaching rate was double the non-UAL leaching rate. In both systems, acid concentration had little effect on copper extraction. Under optimized conditions, 20% amplitude power, 1% S/L, 0.5 M acid, and 80 °C leaching temperature, copper …
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Outotec copper concentrate pressure leaching process ...
Leaching is followed by a neutralization step and then copper solvent extraction and electrowinning. Gold and silver can be recovered by adding a lime boil step before cyanide leaching. The Copper Pressure Oxidation Plant is an Outotec proprietary technology for impure concentrate refining.
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Silver-catalyzed oxidative leaching of an arsenical copper ...
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US20160258036A1 - Heap Leaching of Copper - Google Patents
A method of leaching copper from a heap of ore that includes at least one resting step followed by an irrigation step, wherein, during the irrigation step a leach solution that contains chloride ions is applied to the ore at a higher rate than during the resting step.
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PRESSURE LEACHING OF DECOPPERIZED COPPER …
copper extraction was achieved at leaching temperature of 99.85 °C. The oxygen partial pressure range was chosen according to Weichert et al. (2013) who used the oxygen partial pressure of 5 bars. High sulfuric acid concentrations were selected to improve the process performance with the leaching …
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Leaching of Copper Sulphides - SAIMM
copper sulphide leaching options as alternatives to the more conventional pyrometallurgical processing route of copper sulphides. Three copper sulphide leaching and refining processes are discussed: total pressure oxidation, ferric sulphate leaching and copper chloride leaching. The effect of mineralogy
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PRESSURE LEACHING - RPMGlobal
oxidation plant development has been the processing of copper concentrates. Copper concentrate leaching has been applied as long ago as 1964 at Manduel GOK in the USSR and the Sunshine Mine process plant at Kellogg, Idaho (1980), but copper concentrate leaching …
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The role of non-oxidative processes in the leaching of ...
Nicol, M. ORCID: 0000-0002-8757-161X and Lazaro, I. (2003) The role of non-oxidative processes in the leaching of chalcopyrite. In: 5th Copper-Cobre International Conference (2003), 30 Nov - …
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Copper leaching from primary sulfides: Options for ...
The primary sulfide minerals of copper have been difficult to leach for the purpose of direct copper extraction. In particular, chalcopyrite has been observed to undergo a type of "passivation" under a variety of oxidative leaching conditions.
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Effect of temperature on leaching behavior of copper ...
The leaching conditions were as follows: 30 g ores, sample size less than 74 μm accounting for 80%, sulfuric acid of 1.2 mol/L, leaching time of 120 min, solidâˆ'liquid ratio of 0.2 g/mL, stirring speed of 300 r/min. Table 5 shows the leaching results of copper contents in copper-bearing minerals at different leaching temperatures. 3.2.1 ...
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Extraction of copper from copper and cadmium residues of ...
The process consists of the following steps: atmospheric oxidation acid leaching, cyclone electrowinning of Cu, and recovery of Cd and Zn in Zinc hydrometallurgy process. The advantages of the process are higher leaching efficiency, lower purification requirements on electrolyte, higher cathode current density, and higher metal recovery efficiency.
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Recovery of Cobalt and Copper From Complex Sulfide ...
oxidative pre;sure leaching at 1550 C and conventional precipitation techniques for cobalt recovery. No attempt was made to recover the copper. Because of unfavor able economic conditions, the mine was put on caretaker status in 1982. In 1979, the Bureau undertook labora tory research to develop a process to re cover cobalt and copper ...
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