Production of wrought iron from molten pig iron, in an oxidizing
atmosphere in a reverberatory furnace of special design. Pryor, 3
IL :šd œd ÷Ô s DICTIONARY TERMS:puff blowing Blowing chips out of a hole by means o
[\B]puff blowing[\N]
In powder metallurgy, a cored bar expanded by internal gas pressure.
Rolfe
A person employed to operate an engine used for hauling loaded mine cars
through haulageways. Also the operator of any small stationary hoisting
engine. See also:puffer man
In bituminous coal mining, a worker who operates a small hoisting engine
used for hauling loaded mine cars through haulageways in a mine, or
operates a small stationary engine used for hoisting coal or rock in a
shallow shaft, esp. for prospecting or development work. Also called:
puffer; puffer boy; puffer tender. DOT
See:puffer man
Eng. Travertine; hard enough to use for building; so called from its
cavernous structure. Arkell
a. A parting of clay that sometimes occurs between the walls of a vein and
the country rock; gouge.
b. The coal left on the floor by a coal cutter.
See also:following dirt
c. Clay or other material used in packing cracks to prevent leakage; also,
to use this material.
d. Crushed strata or clay. See also:flucan
One who removes coal left adhering to the floor by a coal-cutting machine.
CTD
The breaking and clearing of the coal left adhering to the floor by a
longwall coal cutter. Nelson
a. A machine for mixing water and clay, consisting of a long horizontal
barrel containing a long longitudinal shaft fitted with knives; the knives
slice through the clay, mixing it with water, which is added by sprays
from the top. The knives are canted to give some screw action, forcing the
clay along the barrel and out one end. AISI
b. See:paddle-type mixing conveyor
a. One who prepares ground, sifted, and filtered clay for molding by
mixing it with water in a rotary-type mixer called a pug mill. This
machine is frequently operated in conjunction with an auger mill and a
cutting machine, the same worker tending the operation of all three
machines simultaneously. Also called clay pugger; mixing-mill operator.
DOT
b. One who mixes ground preheated magnesia and carbon with hot asphalt in
a pug mill to form a viscous mixture suitable for processing into pellets.
Also called: mixer tender; pug miller; pug-mill tender. DOT
See:settler
a. The unit advance during the firing of each complete round of shotholes
in a tunnel.
b. To loosen the rock around the bottom of a hole by blasting. Usually
used with a negative to describe a blast that did not shatter rock to the
desired depth. Nichols, 1
c. The amount of core obtained each time a core barrel is removed from a
borehole. Long
d. To draw or remove coal pillars, or pillars of ore.
e. To hoist drill-stem equipment from a borehole. Long
f. Strata movements over large excavated areas will extend to the surface
and the disturbed surface area is almost always larger than the area of
the underground excavation. The extent of this pull or draw depends on the
depth of the workings, the nature of the strata, the thickness of the seam
being mined, and the degree of packing support. See also:draw
Lewis
Features produced in beds that have been disrupted and separated during
soft-sediment deformation. See also:boudinage
A small crosscut through barren ground to connect two orebodies.
Hess
An operator who charges, pulls out, and otherwise manipulates crucibles.
Mersereau, 2
The rod used between the crank arm or drive arm of the drive unit and the
panline of a shaker conveyor. Also called: connecting rod.
Jones, 1
a. A cylinder, with a shaft for mounting it so that it may rotate; used to
change the direction or plane of belt travel. If the shaft is designed to
be mounted so that it will not rotate, a pulley includes the bearings that
provide for rotation of the cylinder on the shaft. NEMA, 2
b. A sheave or wheel with a grooved rim, over which a winding rope passes
at the top of a headframe. Fay
c. A wheel that carries a cable or belt on part of its surface.
Nichols, 1
See:rollerman
In bituminous coal mining, a laborer who oils and greases the pulleys on
which run the cables that are used to raise and lower cars along haulage
roads underground and at the surface of mines. DOT
See:rollerman