copper ore leaching by sulphuric acid

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extraction of copper using sulphuric acid

LEACHING OF A Cu CoORE FROM CONGO USING leachability of Cu and Co using sulphuric acid and hydrogen peroxide mixtures at different conditions Without hydrogen peroxide the maximum extraction of copper and cobalt were found to be 80 and 15 respectively when the acid concentration was varied between 0.36 1.1M.

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Application of bioleaching to copper mining in Chile

Copper cathodes water sulfuric acid raffinate Fig 1 Block diagram of a typical copper heap bioleaching process Acevedo et al 1993 Many operating factors have strong influence on the performance of heaps as will be discussed in the next section Among them curing and agglomeration are crucial for a satisfactory operation Curing

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Microbial Leaching Bioleaching Biomining

Sulphuric acid is added to maintain pH An outline of microbial leaching of copper is shown in Fig 21.9 Microbial leaching of copper has been widely used in the USA Australia Canada Mexico South Africa and Japan In the USA 200 tonnes of copper is recovered per day.

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sulfuric acid copper leaching

Leaching of copper from cuprous oxide in aerated sulfuric acid The leaching behavior of copper from Cu 2 O in H 2 SO 4 solution was investigated to establish the leaching process for cathode powders produced by the recycling of waste printed circuit boards.

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Chilean Copper Commission Research Department

leading consumers notably copper ore leaching operations on stream since the previous decade plus several major new operations This examination reveals an asymmetric market with demand concentrated in the north and production in the center making sulfuric acid transportation handling and storage highly relevant logistical issues.

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Leaching Kinetics of Praseodymium in Sulfuric Acid of Rare Earth

Leaching Kinetics of Praseodymium in Sulfuric Acid of Rare Earth Elements REE Slag Concentrated by Pyrometallurgy from Magnetite Ore 47 Korean Chem Eng Res Vol 53 February 2015 the leaching 18 19 that has a shape of a spherical particle the chemical reaction may be expre ssed in the following Eq 2 2 However the

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STUDIES ON THE CURING AND LEACHING KINETICS OF MIXED COPPER ORES

existing mathematical models of heap leaching Sulfuric acid curing is a pretreatment to accelerate the extraction kinetics of copper ores and is widely used in copper operations The curing process involves the addition of a highly concentrated sulfuric acid to the copper ore during agglomeration Then chemical reactions already begin prior to

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Improvements in Copper heap leaching by use of wetting agents

leaching of oxide copper ores with sulphuric acid and subsequent SX/EW treatment Several trials on the use of wetting agents in heap leaching of Chilean oxide copper ores have been successfully conducted at IME Institute of Process Metallurgy Metal Recycling at the RWTH Aachen University in cooperation with BASF SE Ludwigshafen.

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Leaching of Manganiferous Ores by Glucose in a Sulfuric Acid

04 08 2001  A kinetic study of a manganiferous ore leaching in acid media by glucose as the reducing agent is here reported The shrinking core model opportunely modified was used to describe the kinetics of the manganese dissolution Considering the complex network of chemical reaction involved in this process a variable activation energy term was introduced in the

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Furnaces Used By Products and Process Used to Smelt Copper

09 04 2010  Sulphuric dioxide gas is created in smelting copper process and is converted sulphuric acid which is used in some of the smelting processes or sold as a by product Modern copper smelters use processed copper ore fed into a flash furnace typically fired by oxygen which produces blister copper being further processed in a converter furnace.

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Automating and Optimizing Copper Heap Leaching Processes

17 03 2021  Copper ore is excavated from the ground crushed and then spread in uniform layers on a pad A slow trickle of sulfuric acid is distributed over the pile where it percolates to the bottom and a collection point The acid leaches out the copper along with other minerals which can be extracted chemically.

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Copper Mining and Extraction Oxide Ores

covered in more detail in Copper Mining and Extraction Sulfide Ores 11–14 but is introduced here because an important by product of this process is used for the extraction of oxide ores Below are different sections of this e source for quick navigation Pyroprocessing Sulfide Ores Provides Acid for Leaching Leaching Oxide Ores

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Nickel leaching from laterite ores by combination of organic and sulfuric acid

10 08 2021  The leaching kinetics study shows that nickel extraction from limonite ore by a mixture of 2 M sulfuric acid and 0.5 M citric acids is controlled by diffusion through solid product layer while the nickel extraction from saprolite ore by a mixture of 0.5 M sulfuric acid and 2 M citric acid is controlled by interface reaction with activation energies of 11.47 kJ/mol and

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Leaching Oxidized Copper Ores Effect of Strength of Acid in Leaching

LEACHING OXIDIZED COPPER ORES EFFECT OF STRENGTH OF ACID IN LEACHING SOLVENT1 By John D Sullivan2 and G L Oldright3 INTRODUCTION In leaching copper ores knowledge of the rate of dissolution of the copper minerals and of the impurities is desirable With knowledge of these two factors and data as to what minerals are present in the ore the

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copper leaching with sulphuric acid

LEACHING OF A Cu CoORE FROM CONGO USING during flotation 3 implies that heap or vat leaching should be considered for these ores In industrial heap or vat operations sulphuric acid is commonly used to leach copper from oxide minerals such as malachite CuCO 3.Cu OH 2 azurite 2CuCO 3.Cu OH 2 and chrysocolla CuO.SiO 2.2H 2 O .

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sulfuric acid usage in copper leaching

04 02 2016  In my previous post i dropped 25litre of water plus 5 litre of 98 sulfuric acid for 90kg or copper ore Is there any formula to know how much pure sufuric acid and water should be mixed for leaching reagent Thanks Kev Top

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How is bioleaching used to extract copper

02 05 2020  Bioleaching involves the use of microorganisms to catalyze the oxidation of iron sulfides to create ferric sulfate and sulfuric acid Ferric sulfate which is a powerful oxidizing agent then oxidizes the copper sulfide minerals and the copper contained is then leached by the sulfuric acid formed.

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Bioleaching

Copper leaching is operated as simple heap leaching and in situ leaching process Dilute sulphuric acid is percolated down through the pile Liquid coming out of bottom of pile reach in mineral Liquid is collected and transported to precipitation plant Metal is

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EXTRACTION AND ECONOMIC UTILIZATION OF COPPER INDIGENOUS COPPER ORES

2.2.1 Leaching with Sulfuric Acid 20 2.2.2 Dump and Heap Leaching 21 2.2.3 Pressure Leaching 22 2.2.4 Bioleaching/Bacterial Leaching 25 2.2.5 Catalyzed Leaching 26 2.2.6 Table 7 Effect of Particle Size of Simple Roasted Ore on Copper Leaching 78

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Sulfuric acid leaching for capturing value from copper rich

Sulfuric acid leaching for capturing value from copper rich converter slag Muhammad Kamran Khalid a Joseph Hamuyuni a Vivek Agarwal a Jouni Pihlasalo b Mika Haapalainen b Mari Lundstrom€ a a Aalto University School of Chemical Engineering Department of Chemical and Metallurgical Engineering P.O Box 16200 FI 00076 Aalto Finland b Outotec Research

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BACTERIAL LEACHING OF COPPER FROM LOW GRADE CHALCOPYRITE ORES

This organism was used for leaching out the copper from low grade chalcopyrite ore which contained 0 6 per cent copper The copper contents of the samples of low grade chalcopyrite ore ranged from 0 2 to O 8 per cent Sporadic deposits of higher grade copper ores also occur at Ingal­ dhal the copper contents of such ores ranged from 1 8

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RECOVERY OF COPPER FROM OXIDE COPPER ORE BY FLOTATION AND LEACHING

flotation and agitating sulphuric acid H 2 SO 4 leaching The ore with 4.21 copper grade used in this study was obtained from Çorum Dangaz region of Turkey Native copper cuprite Cu 2 O tenorite CuO and malachite Cu 2 OH 2 /CO 3 were the main copper minerals in the test sample Quartz calcite illite chlorite and

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Leaching of metals from hydrometallurgical residue by Sulfuric Acid

A direct leaching on the hydrometallurgical residue with sulfuric acid was developed in this work The influence of leaching temperature the leaching time the particle size and the sulfuric acid concentration was examined Results of leaching studies that the recovery extraction of Zn Fe and Cu for hydrometallurgical residue increases with increasing acid concentration and

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Copper mining

2 Leaching The ore is treated with dilute sulphuric acid This trickles slowly through the ore dissolving copper to form copper sulphate The copper is recovered by electrolytic refining Advantages of this process are much less energy is use than in

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A statistical approach to the experimental design of the sulfuric acid leaching

The copper leaching theory as well as the driving force of the kinetics of those reactions has also been very well established However little information was available on the behavior of the Igarapé Bahia ore submitted to a sulfuric acid leaching stage for copper extraction as a pretreatment of the ore for recovery of gold by cyanidation.

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Chemolithotrophic bacteria in copper ores leached at high sulfuric Acid

31 01 2021  Extensive bacterial growth was observed when copper sulfide ores were leached with 0.6 N sulfuric acid The bacterial population developed in this condition was examined by characterization of the spacer regions between the 16S and 23S rRNA genetic loci obtained after PCR amplification of the DNA extracted from the leached ore The spacers observed had the

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Extraction of Tin and Copper by Acid Leaching of PCBs

02 02 2013  For copper in the leached solution sulfate bath was made by adding few drops of sulfuric acid and evaporating all the nitric acid It was titrated to get the amount of copper present For recovery Cementation was carried out at 60 °C till all copper was recovered 3 Results and Discussion

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PDF The Leaching of Dolomitic Copper Ore Using Sulphuric Acid

The leaching of dolomitic copper ore using sulphuric acid under controlled conditions was studied with a view to evaluating the economic value and the effect of ore pulverisation particle size temperature and pH on the recovery of copper from chalcopyrite The samples were ground and mixed with water and sulphuric acid to form an acid soluble copper content of 4.07 8.14 total copper

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Leaching of iron from copper tailings by sulfuric acid behavior kinetics and

In this study the kinetics and mechanism of the leaching of iron from copper tailings using sulfuric acid were studied Under optimal conditions 40 °C sulfuric acid concentration of 0.53 mol L −1 stirring speed of 400 rpm solid/liquid ratio of 1 10 and leaching time of 120 min 66.45 of Fe along with 65.32 of Zn and 59.95 of Cu were leached from the tailings.

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Leaching of iron from copper tailings by sulfuric acid behavior kinetics and

the leaching behaviors of iron can promote the utilization of copper tailings In this study the kinetics and mechanism of the leaching of iron from copper tailings using sulfuric acid were studied Under optimal conditions 40 C sulfuric acid concentration of 0.53 mol L 1 stirring speed of 400 rpm

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PRESSURE LEACHING

Copper concentrate leaching has been driven by two principal and higher sulfuric acid generation the processing of a variety of different ores Pressure leaching is likely to find increased application in upcoming years as even more complex ores are mined.

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Leaching kinetics of near infrared sensor based pre concentrated copper ores by sulphuric acid

copper minerals such as chrysocolla malachite and azurite which are soluble in acids are commonly treated by sulphuric acid Wei et al 2009 Liu et al 2011 Seo et al 2013 It is important to note that the copper ores used in this study contained varying composition of hydrated calcite and silicate with variable composition and

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how does sulfuric acid recovery of copper

Sulfuric acid injection in copper heap leaching LEWA 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 solution of sulfuric acid and copper sulfate is collected in a small pool.

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BACTERIAL LEACHING OF COPPER FROM LOW GRADE CHALCOPYRITE ORES

This organism was used for leaching out the copper from low grade chalcopyrite ore which contained 0 6 per cent copper The copper contents of the samples of low grade chalcopyrite ore ranged from 0 2 to O 8 per cent Sporadic deposits of higher grade copper ores also occur at Ingal­ dhal the copper contents of such ores ranged from 1 8

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Leaching of Copper from Cuprous Oxide in Aerated Sulfuric Acid

Leaching of Copper from Cuprous Oxide in Aerated Sulfuric Acid Ilhwan Park1 Kyoungkeun Yoo1 Richard Diaz 3Alorro2 Min seuk Kim3 and Soo kyung Kim 1Department of Energy Resources Engineering Korea Maritime and Ocean University Busan 49112 South Korea 2Department of Mining Engineering and Metallurgical Engineering Western Australian School

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Chemolithotrophic bacteria in copper ores leached at high sulfuric Acid

Extensive bacterial growth was observed when copper sulfide ores were leached with 0.6 N sulfuric acid The bacterial population developed in this condition was examined by characterization of the spacer regions between the 16S and 23S rRNA genetic loci obtained after PCR amplification of the DNA extracted from the leached ore.

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