See:serrate
A method of channeling inclined beds of marble by removing right-angle
blocks in succession from the various beds, thus giving the floor a zigzag
or sawtooth appearance.
In the United States, a form of overhand stoping in which the general line
of advance is up the dip. The benches are advanced in a line parallel with
the drift. The method permits a large number of machines to be used but
requires the miners to work under a comparatively dangerous back.
Nelson
A process for converting beryl to beryllium oxide, based on quenching the
melted beryl in cold water. The resultant frit reacts with concentrated
sulfuric acid, and is steamed and agitated. The liquid, containing soluble
beryllium and aluminum sulfates, is filtered and pumped to a tank where
ammonium hydroxide is added. The resulting filtrate is further treated
with a chelating agent to prevent impurities from precipitating upon
subsequent addition of caustic soda. Hydrolysis follows, and the
precipitate, beryllium hydroxide, is filtered off. This precipitate is
ignited in an electric furnace to form beryllium oxide. USBM, 7
a. In stonework industry, a general term applied to workers engaged in
cutting stone with power driven saws. DOT
b. A timber cutter.
A slate-cutter's knifelike chopping tool for trimming roof slates, having
a pointed pick at the back to make nail holes. Also called slate ax.
Standard, 2
A pale wine-yellow topaz. Fay
a. To trim rough blocks of stone with a pick or broad chisel; used by
quarrymen. See also:scabble
b. A person who works at a mine contrary to union orders or during a
strike. Zern
c. A defect consisting of a flat volume of metal jointed to a casting
through a small area. It is usually set in a depression, a flat side being
separated from the metal of the casting proper by a thin layer of sand.
ASM, 1
d. A fault in the base metal for vitreous enameling; the scab is a
partially detached piece of metal (which may subsequently have been rolled
into the metal surface) and is liable to cause faults in the applied
enamel coating. Dodd
To dress (as stone) in any way short of fine tooling or rubbing.
CF:scab
In quarry industry, one who roughs stone slabs in blocks with a scabbling
pick to produce a uniform rectangular shape and to reduce shipping weight.
DOT
The rough trimming of blocks of dimension stone.
A hammer with two pointed ends for picking the stone after the spalling
hammer. Fay
Stone chips produced in dressing stone or ore. Arkell
In founding, blistered or marred with scabs; said of a casting.
Standard, 2
a. A deliquescent cubic mineral, MnCl2 . Larsen
b. A name applied to various minerals, including monticellite, a doubtful
selenide of lead, and a brick-red powdery fluoride containing rare earths.
A name occasionally applied to a nugget, as of gold.
A modified Ugine-Sejournet process for hot extrusion of steel and other
metals. The basic difference between the original Sejournet extrusion
process and the Scaife modification is one of direction. In the Sejournet,
the billet is forced forward through the die with the mandrel projecting
through the die to maintain internal shape. In the modified process, the
billet is forced into the closed die and the ram pressure squeezes it back
over the mandrel. Both are based on the use of molten glass as a
lubricant. Osborne
A quantity fully described by a number, such as a speed that has no
associated direction. See also:vector
a. The ratio between linear distance on a map, chart, globe, model, or
photograph and the corresponding distance on the surface being mapped. It
may be expressed in the form either of a direct or verbal statement using
different units (e.g., 1/24,000 or 1:24,000, indicating that one unit on
the map represents 24,000 identical units on the ground) or a graphic
measure (such as a bar or line marked off in feet, miles, or kilometers).
AGI
b. Loose, thin fragments of rock, threatening to break or fall from the
roof or wall of a mine. To remove such fragments.
c. Crude paraffin wax, obtained by filtering the cooled heavy distillation
from petroleum or shale. Standard, 2
d. A fault, in glass or vitreous enamelware, in the form of an embedded
particle of metal oxide or carbon. Dodd
e. Newc. A small portion of air abstracted from the main current. Also
called scale of air, and sometimes spelled skail.
f. To regulate the air current in a roadway. BS, 8
g. Used among English miners for carbonaceous shale interbedded with thin
layers of coal. Tomkeieff
h. The flakes and rubble that fall in after the ore has been removed.
Gordon
In bituminous coal mining, one who scales off loose pieces of slate from
the roof and walls of haulageways, using a pick or a bar. Also called
slate handler. DOT
Copper in very thin flakes. Weed, 2