a. A conical hill or mountain, as an alluvial cone or a volcanic cone.
b. A device used on top of blast furnaces to enable charge to be put in without permitting gas to escape. Syn: bell
c. The conical part of a gas flame next to the orifice of the tip. ASM, 1
d. The conical hill or conical mountain built by an active volcano. Explosive volcanoes build their cones from debris, ranging in size from dust to huge blocks, thrown out from the vent and have steep slopes approaching or exceeding the angle of repose. Quieter volcanoes that pour out lava have much gentler slopes. Hess
e. A three-sided pyramid made of unfired ceramic materials whose composition is such that when heated at a controlled rate they will deform and fuse at a known temperature. It is placed inside a kiln or furnace with ceramic ware to indicate the temperature of the kiln and the fired condition of the ware. See also: pyrometric cone
f. A solid with a circle for a base and with a convex surface that tapers uniformly to a vertex. Jones, 1
g. Geometric pattern of the rock plug or stickup left in the bottom of a borehole drilled by a concave bit. Long
h. Beveled coupling device on a small diamond drill or percussion rock drill used to attach it to a drill column. Long
Source:
Dictionary of Mining, Mineral, and Related Terms












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