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

Bull clam

Mining; General mining

A bulldozer fitted with a curved bowl hinged to the top of the front of the blade.

Wilputte oven

Mining; General mining

A byproduct coke oven having two outer zones in the heating system and one double inner zone. In this oven, the gas is alternately burned upwards in the two outer zones with the products of ...

A burning mixture of a combustible gas (or vapor) and air. Solid fuels burn with a glow, but with little flame. Flames are normally hot, but under some conditions are relatively cool. Principal types ...

Snort valve

Mining; General mining

A butterfly valve opening from the cold-blast main of a blast furnace to the atmosphere. It allows casting at the furnace without shutting down the blowing engines; operated by large wheel or lever ...

Wire drag

Mining; General mining

A buoyed wire towed by a ship at a given depth to determine whether any isolated rocks, small shoals, etc., extend above that depth, or for determining the least depth of an area.

Chrismatite

Mining; General mining

A butyraceous, greenish-yellow to wax-yellow hydrocarbon from Wettin, Saxony, Germany. It has a specific gravity of less than 1 and is soft at 55 to 60 degrees C.