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  2. Mining - Wikipedia

    en.wikipedia.org/wiki/Mining

    This was followed by the Global Mining Initiative which was begun by nine of the largest metals and mining companies and which led to the formation of the International Council on Mining and Metals, whose purpose was to "act as a catalyst" in an effort to improve social and environmental performance in the mining and metals industry ...

  3. Mineral processing - Wikipedia

    en.wikipedia.org/wiki/Mineral_processing

    Mineral processing is the process of separating commercially valuable minerals from their ores in the field of extractive metallurgy. [1] Depending on the processes used in each instance, it is often referred to as ore dressing or ore milling .

  4. Mining engineering - Wikipedia

    en.wikipedia.org/wiki/Mining_engineering

    As there is considerable capital expenditure required for mining operations, an array of pre-mining activities are normally carried out to assess whether a mining operation would be worthwhile. Mineral exploration is the process of locating minerals and assessing their concentrations (grade) and quantities (tonnage), to determine if they are ...

  5. Mining in the United States - Wikipedia

    en.wikipedia.org/wiki/Mining_in_the_United_States

    Mining in the United States has been active since the beginning of colonial times, but became a major industry in the 19th century with a number of new mineral discoveries causing a series of mining rushes. In 2015, the value of coal, metals, and industrial minerals mined in the United States was US$109.6 billion. 158,000 workers were directly ...

  6. Heap leaching - Wikipedia

    en.wikipedia.org/wiki/Heap_leaching

    Similar to in situ mining, heap leach mining differs in that it places ore on a liner, then adds the chemicals via drip systems to the ore, whereas in situ mining lacks these liners and pulls pregnant solution up to obtain the minerals. Heap leaching is widely used in modern large-scale mining operations as it produces the desired concentrates ...

  7. Gold mining - Wikipedia

    en.wikipedia.org/wiki/Gold_mining

    Gold mining can significantly alter the natural environment. Gold mining activities in tropical forests are increasingly causing deforestation along rivers and in remote areas rich in biodiversity. [77] [78] Mining has increased rainforest loss up to 70km beyond lease boundaries, causing nearly 11,670 km 2 of deforestation between 2005 to 2015 ...

  8. How The World Bank Is Financing Environmental Destruction

    projects.huffingtonpost.com/worldbank-evicted...

    Yanacocha, like most modern gold mines, uses a process called cyanide-heap leaching to extract tiny bits of ore from rock. Mining engineers begin by blasting apart hills and other formations, creating deep pits. Each truckload that leaves the pit contains roughly 180 tons of rock and dirt — and about 8.5 ounces of gold.

  9. Mechanical screening - Wikipedia

    en.wikipedia.org/wiki/Mechanical_screening

    The mining and mineral processing industry uses screening for a variety of processing applications. For example, after mining the minerals, the material is transported to a primary crusher. Before crushing large boulder are scalped on a shaker with 0.25 in (6.4 mm) thick shielding screening.

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