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

Local vent

Mining; General mining

A pipe or shaft to convey foul air from a plumbing fixture or a room to the outer air.

Bleeder pipe

Mining; General mining

A pipe inserted in a seal to relieve gas pressure from a sealed area.

Projected pipe

Mining; General mining

A pipe laid on the surface before building a fill that buries it.

A plunger-type jig with the plunger beneath the screen. May be either single or multiple compartments. Its distinguishing features are (1) the stroke is produced with a cam operated by a lever and ...

Faust jig

Mining; General mining

A plunger-type jig, usually built with multiple compartments. It has three distinguishing features: (1) plungers on both sides of the screen plate, are accurately synchronized; (2) the refuse is ...

Nepheline syenite

Mining; General mining

A plutonic rock composed essentially of alkali feldspar and nepheline. It may contain an alkali ferromagnesian mineral, such as an amphibole (riebeckite, arfvedsonite, barkevikite) or a pyroxene ...

Eleolite syenite

Mining; General mining

A plutonic rock composed essentially of alkali feldspar and nepheline. It may contain an alkali ferromagnesian mineral, such as an amphibole (riebeckite, arfvedsonite, barkevikite) or a pyroxene ...