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  2. High-speed steel - Wikipedia

    en.wikipedia.org/wiki/High-speed_steel

    The addition of cobalt increases heat resistance, and can give a hardness up to 70 Rockwell C. [14] M35 M35 is similar to M2, but with 5% cobalt added. M35 is also known as Cobalt Steel, HSSE or HSS-E. It will cut faster and last longer than M2. [15] M42 M42 is a molybdenum-series high-speed steel alloy with an additional 8% cobalt. [14]

  3. Artisanal mining - Wikipedia

    en.wikipedia.org/wiki/Artisanal_mining

    Artisanal mining can include activities as simple as panning for gold in rivers, to as complex as development of underground workings and small-scale processing plants. . Miners use a variety of methods to locate minerals, including historical knowledge, the observation of other minerals or rocks, or technology such as mineral detectors and audio-based reflection seismology surve

  4. Mineral processing - Wikipedia

    en.wikipedia.org/wiki/Mineral_processing

    The difference is the magnitude of the driving force for the separation. Multi-G processes allow the separation of very fine particles to occur (in the range of 5 to 50 micron) by increasing the driving force of separation in order to increase the rate at which particles separate.

  5. Heavy mineral sands ore deposits - Wikipedia

    en.wikipedia.org/wiki/Heavy_mineral_sands_ore...

    Heavy minerals (dark) in a quartz beach sand (Chennai, India).Heavy mineral sands are a class of ore deposit which is an important source of zirconium, titanium, thorium, tungsten, rare-earth elements, the industrial minerals diamond, sapphire, garnet, and occasionally precious metals or gemstones.

  6. Iron oxide copper gold ore deposits - Wikipedia

    en.wikipedia.org/wiki/Iron_oxide_copper_gold_ore...

    The content of gold within these deposits is largely variable, and can be a factor in the economic value of the deposit. The gold contents of all deposits averages 0.41 g/t Au, with the majority of worldwide deposits averaging less than 1 g/t Au. [2] The occurrence of native gold mineralization. Example from Kalgoorlie Australia.

  7. ‘Here it is better not to be born’: Cobalt mining for Big ...

    www.aol.com/news/better-not-born-cobalt-mining...

    Around 75 per cent of the world’s cobalt is mined in the DRC -- and the world cannot get enough of it. The rare, silvery metal is an essential component to every lithium-ion rechargeable battery ...

  8. 3 Cobalt-Mining Stocks to Buy for Big-Tech Demand - AOL

    www.aol.com/news/3-cobalt-mining-stocks-buy...

    The price of cobalt sulphate increased 78% last year in China as the EV market began to expand in the world’s largest economy. 3 Cobalt-Mining Stocks to Buy for Big-Tech Demand Skip to main content

  9. Cobaltite - Wikipedia

    en.wikipedia.org/wiki/Cobaltite

    Its name stems from the contained element cobalt, whose name is attributed to the German term Kobold, referring to an "underground spirit" or "goblin". The notion of "bewitched" minerals stems from cobaltite and other cobalt ores withstanding the smelting methods of the medieval period, often producing foul-smelling, poisonous fumes in the process.

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