process for leaching copper ore bodies

  • Copper Mining and Extraction: Oxide Ores

    Most of the copper ores mined today are oxide or sulfide ores. Extraction of sulfide ores is 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. Pyroprocessing Sulfide Ores Provides Acid for Leaching

  • CONVERSION OF FLOTATION PROCESSING USING THE HEAP …

    Copper recovery from oxide ore with over 10% of oxide content % 0.54 Copper recovery by leaching from sulfide ore 0.55 Discount rate % 10.0 3.1 Scenario 1 The obtained results by Scenario 1, or the current processing process, i.e. total ore undergoes to the flotation, without selective excavation and separation on two types of ore - sulphide ...

  • Benefits of Agglomeration in an SX-EW Process for Copper ...

    Heap Leaching Copper Ore with Agglomeration. Crushed copper ore is first typically processed via heap leaching. An effective leaching step is critical to SX-EW, as it sets the stage for how much copper can be recovered. For this reason, the heap leaching step is commonly preceded by agglomeration of the ore …

  • TENORM: Copper Mining and Production Wastes | Radiation Prote…

    How is leaching carried out in case of low grade copper ores?

  • Industrial Application of Ammonia Assisted Cyanide ...

    leaching and low grade ore (<1 g/t Au) going to heap leaching. Accordingly, a 100t/h stand-alone agitation leach plant, including resin-in-pulp solution processing, was designed, built, and commissioned by July 2013. In the next section, the design of this plant and its incorporation into the existing heap leach process circuit is described.

  • US6312500B1

    A process is provided for heap leaching ore to recover nickel. The process is particularly effective for ores that have a tangible clay component (i.e., greater than about 10% by weight). The process includes sizing the ore (where necessary), forming pellets by contacting ore with a lixiviant and agglomerating. The pellets are formed into a heap and leached with sulfuric acid to extract the ...

  • Factors governing the oxidation of iron solutions used as ...

    is the electrolytic or anodic oxidation process. Van Arsdale, discussing leaching tests of the Inspiration Consolidated Cop­ per Company, state# that although the literature on the subject 6 6 - Van Arsdale, G. D., leashing Mixed Copper Ore With Ferric Sulphate, Inspiration Consolidated Copper Co,s Trane.

  • Copper Mining and Production Processes Explained

    Leaching offers an alternative to copper mining. First, the ore is treated with dilute sulphuric acid. This trickles slowly down through the ore, over a period of months, dissolving copper to form a weak solution of copper sulphate. The copper is then recovered by electrolysis. This process is known as SX-EW (solvent extraction/electrowinning).

  • Agglomeration technique improves heap leaching process ...

     · Thanks to low capital and operating expenses, heap leaching is opening up new opportunities in exploiting low-grade ore bodies and tailings. Where only around 3 percent of copper and gold was extracted through heap leaching decades ago, more than 30 percent of copper and gold are now produced courtesy of this hydrometallurgical technique. 2

  • Metals | Special Issue : Advances in Selective Flotation ...

    Therefore, flotation and leaching, both of which are the first stage of each scenario, of finely-ground ores are of crucial importance to assure the continued supply of metals. This Special Issue will be devoted to collecting papers on recent advances in selective flotation and leaching processes for any metal-containing ores.

  • DEVELOPMENT OF A GLYCINE-CYANIDE LEACH PROCESS …

    sparked interest in the potential application of cyanidation leaching either as a whole of ore process or as a bulk sulphide concentrate leach process for maximising gold recovery from this ore body. A concept engineering study was completed in June 2012 to assess the following processing options:

  • The use of geometallurgy in the processing of a complex ...

    silver and copper from these ores. The processes include heap leaching, agitation leaching and flotation. Geometallurgy is used to classify the various types of ore found in this complex ore body and to determine the optimum processing route for each ore type. Examples of the ore …

  • Acid Leaching

     · The flowsheet discussed in this study is for treatment of 100 tons per day oxide-sulfide copper ore by the leaching process using sulfuric acid-ferric sulfate solvent. This flowsheet would also be suitable for a larger tonnage by proper sizing of the various units of equipment. The flowsheet contemplates a six to seven day leach-wash cycle with ...

  • Leaching of Copper Sulphides

    POX in a copper heap leach circuit. Figure 2. Simplified ferric leaching flowsheet. Figure 3. Copper chloride leach process. Leaching Chemistry As outlined earlier, the leaching chemistry that takes place within a total POX autoclave is very complex and will vary from case to case according to the mineralogy of the concentrate fed to the

  • Copper Ore Types: Sulfides versus Oxides | Nasdaq

     · Secondary sulfides formed by supergene secondary enrichment are resistant to sulfuric leaching. When rich enough, native copper ore bodies may be treated to recover the contained copper …

  • LEACHING OF LOW-GRADE COPPER ORES: A CASE STUDY …

    raw materials with the process of leaching of the present minerals and subsequent extraction of copper from the leach solution. This paper describes the influence of acid concentration and influence of solid/liquid ratio on copper leaching rate from the ore bodies Cerovo-Cementacija 2 (C2). 2. Experimental 2.1. Material

  • Copper extraction

    Therefore, if the ore has 40 g/t of cyanide-soluble copper, then the minimum quantity of cyanide required for copper leaching is 0.1 kg NaCN/t. If the quantity of copper extracted increases to 300 g/t then the cyanide requirement increases to 0.7 kg NaCN/t. Viewed another way, since the 3 moles of cyanide that are complexed with each mole of ...

  • Ammonia Leaching: A New Approach of Copper Industry in ...

     · Although copper oxide and pure copper were first used to recover copper due to high solubility in ammonia, later on ammonia leaching of sulfide ores was also considered. The common method was the use of oxide roasting at high temperatures to convert sulfides to oxides in order to facilitate dissolution in ammonia solutions [ 1 ].

  • Copper Solvent Extraction: Status, Operating Practices and ...

    copper in a matter of hours, rather than months or even years in the case of heap leaching. An additional feature of DRC operations is that the ore bodies often contain significant quantities of cobalt, usually produced as an intermediate cobalt hydroxide product which is further refined in Europe or China.

  • Heap Leaching

    2.1 Leaching. Most copper leaching is done by piling broken ore (∼0.5% Cu) into flat-surface, 3–10m high, 10 4 –10 5 m 2 heaps of ore and then sprinkling dilute sulfuric acid lixiviant on to the heap surface. The lixiviant trickles down through the heap and leaches copper from its minerals to produce a pregnant leach solution containing 1–5kg Cum −3.

  • New Processes for Cleaning Up Copper Concentrates | E & MJ

    GlyLeach Process–The GlyLeach Process, under development at Curtin University, Australia, is an alkaline-based process utilizing glycine—a non-toxic, non-corrosive, environmentally benign amino acid—for leaching copper, gold and silver from primary copper sulphide concentrates as well as secondary sulphide, mixed and oxide ores. The ...

  • Copper Mining and Processing: Processing Copper Ores ...

    Copper processing is a complicated process that begins with mining of the ore (less than 1% copper) and ends with sheets of 99.99% pure copper called cathodes, which will ultimately be made into products for everyday use.The most common types of ore, copper oxide and copper sulfide, undergo two different processes, hydrometallurgy and pyrometallurgy, respectively, due to the different ...

  • Technical Overview August 2019

    conventional acid leaching for high acid consuming copper ores is dependent upon a multitude of parameters specific to the mineralogy of the deposit and its location. Suffice it to say that the capital and operating cost savings can be major, particularly for high acid consuming ore bodies located in remote locations with long transport distances.

  • Acid leaching of oxide–sulfide copper ore prior the ...

    leaching process has achieved a better economic result. In the present study the leaching of oxide-sulfide copper ore was considered, and a modification of the existing process was performed by inserting the leach-ing process between the ore milling and the flotation sections. Therefore, a higher overall efficiency of the

  • Bacterial leaching of ores and other materials

    Chiefly copper ores of the porphyric type (disseminated copper ores) with low concentrations of copper (below 0.6% Cu) are leached in this way. For instance in some states of the U.S.A. at some open pit mines, in which low grade copper ores are excavated, big dump leaching facilities are operated.

  • Benefits of Agglomeration in an SX-EW Process for Copper ...

    Heap Leaching Copper Ore with Agglomeration. Crushed copper ore is first typically processed via heap leaching. An effective leaching step is critical to SX-EW, as it sets the stage for how much copper can be recovered. For this reason, the heap leaching step is commonly preceded by agglomeration of the ore in a rotary drum agglomerator.

  • Day 51, Procedures to obtain gold: Vat Leaching Process ...

     · Vat leaching can be considered when an ore body does not have the grade or quantity to be a candidate for normal agitation leaching, and as an alternative to heap leaching. At a location where there is excessive rainfall, such as more than 120 in./yr, or even a short and intense rainy season on the order of 50 in., the solution in heap leaching ...

  • TENORM: Copper Mining and Production Wastes | Radiation ...

    During in-situ leaching, rather than physically mining and removing overburden to reach copper deposits, chemicals are introduced into ore bodies using injection wells. The PLS is then captured in production wells, collected and later processed.

  • EXTRACTING METALS FROM SULFIDE ORES

    The zinc is recovered by electrolysis as it is in the roast leach process already described. Leaching of copper from ores has focused mainly on oxide ore types. Most oxide copper ores are not amenable to present-day flotation techniques and are not rich enough for direct smelting.

  • Acid Leaching

     · The flowsheet discussed in this study is for treatment of 100 tons per day oxide-sulfide copper ore by the leaching process using sulfuric acid-ferric sulfate solvent. This flowsheet would also be suitable for a larger tonnage by proper sizing of the various units of equipment. The flowsheet contemplates a six to seven day leach …

  • In situ recovery of copper sulfide ores: Alternative ...

     · In process scheme 1, indirect bioleaching (IBL), the ore bed porosity is assumed to be completely filled with the leaching solution and leaching of copper sulfides occurred just with the 3 g/L of ferric contained in the incoming leaching solution produced in an external bioreactor (Pakostova et al., 2017; Biomore, 2018).

  • Copper Mining Using Acidothiobacillus

     · Copper Extraction from Leach Liquor. The isolation of copper metal from leach liquor is a two-step process (Wikipedia: Copper Extraction Techniques ). The leach liquor obtained after heap irrigation has a very low concentration of copper dissolved into it, around 0.5 - 2.0 g/L.

  • Leaching of copper concentrates

    and cobalt in which copper is recovered as high grade copper sulfide, copper sulfides were economically recovered in a hydrometallurgical process only during the leaching of waste dumps. . Need for Hydrometallurgical Processes Since most of the copper production in the world comes from the treatment of sulfide ores, hydrometallurgy

  • Toward a more sustainable mining future with ...

    Metals are currently almost exclusively extracted from their ore via physical excavation. This energy-intensive process dictates that metal mining remains among the foremost CO2 emitters and mine waste is the single largest waste form by mass. We propose a new approach, electrokinetic in situ leaching (EK-ISL), and demonstrate its applicability for a Cu-bearing sulfidic porphyry ore.

  • A fresh approach to sulfide ores

     · A smelting workaround. The traditional route for extracting copper from sulfide ores is smelting. Yet there is a growing case for leaching sulfides from lower grade ore bodies and especially for those ore bodies containing problematic elements like arsenic, which make smelting less economical. Smelting is increasingly expensive because, in ...

  • The Leachox™ Refractory Gold Process – The Testing, Design ...

    Knowledge of the mineralogy of an whilst always an essential starting point for ore body drafting any process flowsheet, then becomes even more vital for refractory ores. Once the process mineralogy has been established there are commercially successful processes some developed over the years to treat such refractory gold ores.

  • Recovery of Copper by Solution Mining Methods

    leaching of copper-bearing ores in the U.S The dissolved copper recovered by this operation was derived from the natural oxidation and leaching of sulfide mineralization in a major porphyry copper deposit located in the headwaters of Bingham Creek. This is the present site of the large-scale, open pit operation at Bingham Canyon, which

  • PRESSURE LEACHING

    2) The increase in penalty elements in some ore bodies – the principal penalty element being found today is arsenic which is fixed through pressure oxidation, but other elements are sometimes found, depending on the ore body, including bismuth, etc. There are two principal copper concentrate pressure leaching

  • EXTRACTION AND ECONOMIC UTILIZATION OF COPPER …

    2.4.2 Ammonia Leach Process 39 2.4.3 Chloride Based Leach Process 40 2.4.4 Chloride-Sulfate Leach Process 41 2.4.5 Counter Current Leach Process 43 2.4.6 Temperature Pressure Acid Leach Process 43 2.5 Reagents Used in Leach Processes 45 2.5.1 Similarities of Hydrometallurgical Leaching Techniques (Copper Sulfide Ores) 47

  • US3260593A

    239000010949 copper Substances 0.000 title claims description 67 229910052802 copper Inorganic materials 0.000 title claims description 67 Process for leaching copper from lowgrade, copper-bearing ore …

  • A novel sequential heap leach process for treating crushed ...

    pressure leach stages by directly leaching crushed whole ore through a sequential heap leaching process, or running a low-grade heap leach operation parallel with a high grade conventional operation. The first stage of this process involves a thermophile heap bioleach to extract BMs (Cu, Ni, and Co).

  • Leaching and kinetic modeling of calcareous bornite in ...

     · The leaching process of copper from bornite ore is a solid–liquid multi-phase reaction, and the leaching reaction occurs on the interface of two phases. The most common kinetic model for solid–liquid reaction is the shrinking unreacted core model (SCM) (Levenspiel, 1972).