Mineral mining

Mineral mining

The extraction of valuable minerals or other geological materials from the earth for economic interests.

Industry: Mining

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Mineral mining

Cagutte

Mining; General mining

A baguette; an oblong cut diamond.

Graf sea gravimeter

Mining; General mining

A balance-type gravity metre that is heavily damped in order to attenuate shipboard vertical accelerations. It consists of a mass at the end of a horizontal arm, supported by a torsion-spring ...

Cardoxide

Mining; General mining

A baked mixture of caustic soda and lime, used in the container or regenerator of selfcontained mine-rescue or oxygen-breathing apparatus to absorb the exhaled carbon dioxide. It has an advantage ...

Marcy mill

Mining; General mining

A ball mill in which a vertical-grate diaphragm is placed near the discharge end. Between this perforated diaphragm and the end of the tube, there are arranged screens for sizing the material, ...

Cement valve

Mining; General mining

A ball, flapper, or clack-type valve placed at the bottom of a string of casing, through which cement is pumped. When pumping ceases, the valve closes and prevents return of cement into the casing.