Dump Leaching Operations

  • Heap leaching - Wikipedia

    Most mining companies favor the economic feasibility of heap leaching, considering that heap leaching is a better alternative to conventional processing (such as flotation, agitation, and vat leaching) Additionally, dump leaching is an essential part of most copper mining operations and along with other factors, determines the quality grade of

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  • Copper Dump Leaching and Management Practices That

    Dump leaching operations are always constructed in the immediate vicinity of the mine site Leach sites are selected to minimize haulage costs and to utilize the natural drainage patterns of the native terrain for collection of the pregnant liquor solutions

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  • Precious Metal Heap Leach Design and Practice - Ore-Max

    different heap leach operations with a total production of 198 tonnes of gold per year (6,150,000 ounces/yr) were surveyed to determine operating practice concentration, flotation, and agitated tank leaching Methods similar to heap leaching can be employed: dump leaching and vat leaching (vat leaching is the treatment of sand or crushed

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  • Gold & Silver Leaching Methods - 911metallurgist

    Dump Leaching Ore Preparation Although waste rock from either underground or open pit mines is of too low a grade to warrant conventional milling, some gold or silver may be recovered by leaching it If dumps are leached without additional ore preparation or transporting the rock to prepared pads, the operation is termed a dump leach

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  • TENORM: Copper Mining and Production Wastes | Radiation

    Heap Leaching In contrast to dump leaching, heap leaching refers to the application of chemicals to low-grade ore that has been crushed and deposited on a specially designed pad The pad is lined with synthetic or natural materials such as polyethylene or compacted clay Copper heap leach operations are much smaller than copper dump leaches

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  • Dump leaching - BioMineWiki - Skellefteå

    The leach solution percolates through the dump and is collected in ditches at the base of the dump It can be considered to be a crude version of heap leaching where no special arrangements are made to increase the leaching rate Therefore, metal recoveries from dump leaching operations are low and the duration of the operation is relatively long

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  • Copper Dump Leaching and Management Practices that

    copper dump leaching operations General Characteristics Although the number of active mines in the United States has decreased in recent years, the percentage of primary copper produced by leaching has increased low copper prices have resulted in the closing of many mining, milling, and smelting operations

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  • Waste Dump Leaching Copper

    The leaching model can aid in maximizing minerals and metals recovery from primary sources by giving operators and management a better understanding of the copper leaching process This will aid in improving dump leaching operations

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  • heap leaching method - tcfuwhrorg

    Nov 06, 2018 · Heap leaching - Wikipedia Heap leaching is an industrial mining process to extract precious metals, copper, uranium, and The method is an acid heap leaching method like that of the copper method in that it utilises sulfuric acid instead of cyanide solution to dissolve

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  • Mining Industry Profile: Copper - US EPA

    their life cycles These include spent ore at dump leaching operations: here, only when active leaching for copper recovery ends is the spent ore that comprises the dump considered a waste The issue of whether a particular material is a waste clearly depends on the specific circumstances surrounding its generation and management at the time

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  • Gold and Silver Leaching Practices in the United States

    velop such operations for leaching gold and silver One attempt to in situ'leach gold at the Ajax Mine near Victor, CO, iq described later Since many operators are considering leaching gold and silver for the first time or are experiencing problems in es- tablishing leaching operations, this re- BURIED ORE

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  • Copper Dump Leaching and Management Practices That

    Section 3 provides a more detailed description of the copper dump leach- ing practices currently used in the United States In addition to a detailed discussion of dump leaching operations (the most prevalent method in the United States), it includes a description of heap, in situ, vat, and agita- tion leaching operations

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  • Dump leaching - Wikipedia

    Dump leaching is an industrial process to extract precious metals and copper from ores Dump leaching is similar to heap leaching, however in the case of dump leaching ore is taken directly from the mine and stacked on the leach pad without crushing where,

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  • Alternative Methods for Copper Recovery from Dump Leach

    The Bureau of Mines conducted large-scale laboratory copper ore leaching tests to enable improving copper recovery from large dump- leaching operations This was done by comparing leaching progress when copper was recovered from recycled leach liquor …

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  • Microflora of two industrial copper dump leaching operations

    The microflora composition of the industrial coppper dump leaching operations at Vlaikov Vrah and Tsar Assen mines, Bulgaria, is similar and consists mainly of mesophilic acidophilic

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  • Microbial communities in four industrial copper dump

    The microflora of four industrial copper dump leaching operations in Bulgaria was studied in detail The microbial communities in these operations had a similar species composition but differed from each other with respect to the counts of microorganism related to the different species

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  • heap leaching of copper - perkinspreschool

    Sep 22, 2018 · Sep 8, 2008 Heap leaching is, in contrast to many dump leaching operations, Heap leaching plant for extraction of copper from oxidic ore in Lomas Bayas Contact Us Heap Leaching Technique in Mining - Euromines Heap leaching is a tried and tested mining technique enabling the In the 16th century, the extraction of copper by dump

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  • Leaching Copper Operations - maliziabe

    Copper Dump Leaching and Management Practices That Copper leaching operations are massive; thus, management practices required for adequate control of potential ground-water contamination from leaching operations also must be on a very large scale Get Price

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  • Heap leaching - BioMineWiki - Skellefteå

    Heap leaching is, in contrast to many dump leaching operations, a pre-planned process where arrangements are made to optimize conditions for leaching In brief, the mineral ore or concentrate is piled in a heap and lixiviant fluid is distributed over the surface to leach metal from the heap

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  • Observations on the microflora in an industrial copper

    The stone presents many years of observations on the microflora in a large dump in Vlaikov vrah, Bulgaria, containing about twenty million tons of low-grade copper sulphide and oxide ores

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  • Bioleaching: metal solubilization by microorganisms

    The leaching is practised in large basins containing up to 12 000 tons of ore The procedure is similar to that of dump leaching In some heap leaching operations, pipes are placed in strategic positions within the heaps during its construction to provide the deeper portions of the heap with sufficient amounts of oxygen 523 Underground leaching

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  • reeearch about leaching time in heap leaching method

    Nov 13, 2018 · Gold and Silver Leaching Practices in the United States IC 8969 Research on novel solution mining methods In situ leaching 24 TABLES Gold and silver heap and dump leaching operations in the Western United States consumptions and reduced leaching time DUMP LEACHING

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  • Heap leaching | industrial process | Britannica

    Heap leaching is done on ores of semilow grade—that is, high enough to be brought to the surface for treatment This method is increasing in popularity as larger tonnages of semilow-grade ore are mined

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  • Managing Industrial Solid Wastes From Manufacturing

    The 1985 Report included dump and heap leaching piles (ie, materials resulting from using chemicals to leach out metals) as waste4 In 1986, EPA agreed that this designation was incor-rect; that is, active leaching operations are produc-tion processes (as long as the materials do not escape from the leaching pad) and leach liquor treated to

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  • Microbial communities in four industrial copper dump

    Abstract: The microflora of four industrial copper dump leaching operations in Bulgaria was studied in detail The microbial communities in these operations had a similar species composition but differed from each other with respect to the counts of microorganism related to the different species

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  • Heap leaching | industrial process | Britannica

    Heap leaching is done on ores of semilow grade—that is, high enough to be brought to the surface for treatment This method is increasing in popularity as larger tonnages of semilow-grade ore are mined

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  • Managing Industrial Solid Wastes From Manufacturing

    The 1985 Report included dump and heap leaching piles (ie, materials resulting from using chemicals to leach out metals) as waste4 In 1986, EPA agreed that this designation was incor-rect; that is, active leaching operations are produc-tion processes (as long as the materials do not escape from the leaching pad) and leach liquor treated to

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  • A mathematical model of the chemistry of the dump leaching

    A DUEÇ) Leaching Operations Dump leaching operations have been discussed in detail in the publications by Woodcock (51) and by Sheffer and Evans (43); the following sunmary of information is drawn from these sources Tlie copper sulfide minerals important in dump leaching are chalcopyrite, chalcocite and, to a lesser extent, covellite and bomite

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  • Influence of Chelating Reagents on Leaching of Copper Ore

    INFLUENCE OF CHELATING REAGENTS ON LEACHING OF COPPER ORE By Larry A Haas 1 and Terry L Hebble 2 ABSTRACT A major problem encountered in dump leaching operations is the plug­ ging of both the dump and the piping by precipitated iron compounds Bureau of Mines research to obtain basic data on agitation leaching and

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  • Bioleaching: metal solubilization by microorganisms | FEMS

    521 Dump leaching Dump leaching is the oldest process The size of the dumps varies considerably and the amount of ore may be in the range of several hundred thousand tons of ore The top of the dump is sprinkled continuously or flooded temporarily

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  • ASARCO » Silver Bell Mine

    Operations: The mine operates four open-pits (North Silver Bell, El Tiro, West Oxide and East Oxide) All copper in these pits will be extracted from the ore utilizing dump leaching Each month 1,800,000 tons of ore and waste are mined The four open-pits and …

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  • Producing Copper Nature's Way: Bioleaching

    In 2001, bioleaching constituted approximately 10% of Chilean copper production and heap and dump leaching, in general, constituted approximately 30% of Chilean production 2 The first Chilean plant to be put into operation was SM Pudahuel

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  • US7635457B2 - Method for heap and dump leaching coupled

    For example, in copper leaching operations, such as, for example, in the heap or dump leaching of copper ores, sulfuric acid in an aqueous solution is contacted with copper oxide and sulfide minerals of …

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  • Bioleaching: metal solubilization by microorganisms

    The leaching is practised in large basins containing up to 12 000 tons of ore The procedure is similar to that of dump leaching In some heap leaching operations, pipes are placed in strategic positions within the heaps during its construction to provide the deeper portions of the heap with sufficient amounts of oxygen

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  • APP Fact Sheet - azdeqgov

    concentrating operations, dump leaching, solvent extraction and electrowinning (SX/EW) operations, tailings storage facilities, waste dumps, process solution ponds, stormwater runoff ponds, process pipelines, and ancillary maintenance and operation facilities

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  • APPENDIX B POTENTIAL ENVIRONMENTAL IMPACTS OF …

    Heap leaching (as distinguished from dump leaching) is used for higher trade (more valuable) ores and is generally smaller than dump leach operations Almost invariably, there are one or more impermeable liners under the leach material to maximize recovery of the leachate Heap leaching often takes place over months rather than years

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  • INTERNAL REVENUE SERVICE NATIONAL OFFICE TECHNICAL …

    and dump leach piles are carefully constructed so as to maximize the Metal 1 that will be recovered First, the depth of each layer (called a “lift”) added to a heap leach or dump leach pile is determined by engineering studies that take into account the leaching qualities of the material being added to the pile Trucks dump the leaching ore

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  • Energy and Environmental Profile of the US Mining Industry 5

    Energy and Environmental Profile of the US Mining Industry 51 Process Overview 511 Copper Ore Mining Copper is commonly extracted from surface, underground and increasingly, from in situ operations In 2000, the principal mining States, in descending order, Arizona, Utah, New Mexico, and Montana, accounted for 99 percent of domestic

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