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Dump Leaching. Dump leaching was initiated during the late 1960s. One of the well-known dump leaching operations is located in Bingham Canyon, Utah (The United States) of the Kennecott Copper mines. The largest of the dumps at this site contained about 4 billion tons of low-grade copper ore.
Maintaining the stability of the dump may require relocation of weathered rock or material blending, especially if water is present (Russell, 2008). • If it is a dump leach, a leaching cycle time will define the mining delivery rate and dumping schedule. Ideally, deliveries rate from the mine should match the leaching cycle times of the dump.
The dump leaching of low-grade copper ores, as an integral part of the open-pit mining operations in the Southwest, has been practiced for the last fifty years and is increasing in importance as one of the major sources of copper. ... In contrast, …
In contrast to dump leaching, heap leaching refers to the leaching of low-grade ore that has been deposited on a specially prepared pad (e.g., synthetic, asphalt, or compacted clay pad). In heap leaching, the ore is frequently crushed prior to emplacement. Site-specific characterisitcs determine the nature and extent of the leaching operations ...
The dump leaching of low-grade copper ores, as an integral part of the open-pit mining operations in the Southwest, has been practiced for the last fifty years and is increasing in importance as one of the major sources of copper. ... In contrast, the rate of gas uptake in sample 7-17-67-4 was nearly the same for the sample with or without ...
In contrast to other dump leach operations, this leach pad will be sealed at its base and leaching will be managed using air injection to control sulphide oxidation. Metallurgical testwork carried out to date has included a 300,000 tonne test dump and associated solvent-extraction
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, in the case of gold and silver, the dump is irrigated with a dilute cyanide solution that percolates through the ore to dissolve gold and ...
Dump leaching refers to the leaching of low- grade ore that has been deposited directly on the ground. The pregnant leach solution is typically collected in unlined natural drainage basins. In contrast, heap leaching refers to the leaching of ore that has been deposited on specially prepared pads.
The upper 8 foot zone of this dump contained only 1. 5 percent dissolved solids in the interstitial solutions, whereas leach solutions coming onto the dump have averaged about 5.6 percent. These findings are in sharp contrast to those obtained in the previous study on the more permeable leach …
ⓘ Dump leaching. 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, in the case of gold and silver, the dump is irrigated with a dilute cyanide solution that percolates through the ore to ...
Heap and dump leaching are diffusion controlled – never chemical reaction-rate controlled. The long leach times are due to the changes in the diffusion rate caused by the geo-technical characteristics of the ore – especially the presence of clays, micas, and other platey and asicular-shaped particles – and not the intrinsic rate of ...
Final leachate is leachate that is collected after all storage and treatment processes that are in place within a given landfill. This sample type is in contrast to the sampling of "fresh" leachate (i.e. before all storage and treatment processes with a given landfill). 3. …
Hence, heap leaching is associated with relatively small particles stacked in relatively thin layers; and dump leaching is associated with very large particles stacked in very thick layers. Needless to say, these differences in scale should have profound effects on the rate of copper extraction, and the ultimate copper recovery obtained.
Heap leaching is one of several leaching methods. 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 ...
aMining is essentially a Comminution process (see table 6-l); dump leaching uses materials that have already been mined and broken UP withexdosives bpflma~ily Iow.grade oxidized minerals (e.g., malachite,azurite, chrysocolla,-cu prite, tenorite) but also sulfideminerals in waste dumps. ccement copper usually is smelted, converted, and
In contrast to heap and dump leaching, vat leaching takes place in fabricated vessels (i.e., internal containment of the solution). Wiley fill leaching is similiar to heap leaching, except that it typically takes place in a hilly terrain where flat space for a heap pad is not available; the
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, in the case of gold and silver, the dump is irrigated with a dilute cyanide solution that percolates through the ore to dissolve gold and ...