An early name for nickel-bearing marcasite.
To fasten a timber by toenailing.
A construction of conveyor belt made up of plies of cotton fabric stitched
together. Stitched canvas belts may be untreated, impregnated, or coated.
See also:belt
Containing a random variable; word used to describe a system (e.g.,
sampling method) that has in it an element of randomness. Pryor, 3
a. A rarely used term for a chimneylike orebody. Syn:pipe
b. An irregular, metalliferous mass in a rock formation, such as a stock
of lead ore in limestone. CF:boss
Person who lifts and moves stock, such as limestone, scrap iron, or pig
iron, for the open-hearth furnace. DOT
Person who drives an electric car to haul ore and limestone from the
stockpiles to the blast furnace. DOT
A belt conveyor in a blending system that receives bulk materials for
delivery to the stacker conveyor.
a. An accumulation of ore or mineral built up when demand slackens or when
the treatment plant or beneficiation equipment is incomplete or
temporarily unequal to handling the mine output; any heap of material
formed to create a reserve for loading or other purposes. Nelson
b. The ore accumulated at the surface when shipping is suspended.
Standard, 2
c. Material dug and piled for future use. Nichols, 2
A mineral deposit consisting of a three-dimensional network of planar to
irregular veinlets closely enough spaced that the whole mass can be mined.
CF:reticulate
A space reserved on the surface near the materials shaft for the temporary
storage of steel, timber, and other bulky items of supplies for mine use.
The yard is surfaced and a mine car is used throughout. Nelson
With reference to a compound or a phase, pertaining to the exact
proportions of its constituents specified by its chemical formula. It is
generally implied that a stoichiometric phase does not deviate measurably
from its ideal composition. AGI
Unit of kinematic viscosity. The cgs unit of kinematic viscosity being
that of a fluid that has a viscosity of 1 P (100 mPa.s) and a density of 1
g/cm3 . Webster 3rd
A hole, as in a reverberatory furnace, for introducing a rabble or other
tool for stirring. Standard, 2
A mechanical appliance for feeding coal, coke, or other fuel into a boiler
or furnace. In hand stoking, the person who shovels the fuel into the
furnace is known as the stoker. See also:underfeed stoker;
vibrating grate. Nelson
a. A screen size of coal specif. for use in automatic firing equipment.
BCI
b. This coal can be of any rank and the stoker is usually designed to fit
the coal available. Factors of importance in the selection of coal for
stoker use are size limits; size consist; uniformity of shipments; coking
properties; ash-fusion characteristics; ash, sulfur, and volatile-matter
percentages. Mitchell
An orthorhombic mineral, CaSnSi3 O9 .2H2 O ; forms
acute pyramids; at Roscommon Cliff, St. Just, Cornwall, U.K.
a. A formula expressing the rates of settling of spherical particles in a
fluid. AGI
b. Gives the rate of fall of a small sphere in a viscous fluid. When a
small sphere falls under the action of gravity through a viscous medium it
ultimately acquires a constant velocity, V: V = 2ga2 (d1
-d2 )/9eta where g is gravitational acceleration, a is the radius
of the sphere, d1 and d2 are the densities of the sphere and
of the medium, respectively, and eta is the coefficient of viscosity. V
will be in centimeters per second if g is in centimeters per second per
second; a will be in centimeters; d1 and d2 will be in grams
per cubic centimeter; and eta will be in dynes second per square
centimeter, or poises. Handbook of Chemistry and Physics, 2
c. The wavelength of light emitted by a fluorescent material is longer
than that of the radiation used to excite the fluorescence. In modern
language, the emitted photons carry off less energy than is brought in by
the exciting photons; the details accord with the energy conservation
principle. See also:elutriator; sedimentation test; terminal velocity.
Handbook of Chemistry and Physics, 2
d. At low velocities, the frictional force on a spherical body moving
through a fluid at constant velocity is equal to 6pi times the product of
the velocity, the fluid viscosity, and the radius of the sphere. The
wavelength of luminescence excited by radiation is always greater than
that of the exciting radiation. McGraw-Hill, 1
The simplest type of stretcher used for underground first aid. This
basket-type stretcher acts as a splint for the whole body, and is
constructed of tubular steel and strong wire mesh. Used for lifting or
lowering injured persons in difficult places. This type of stretcher is
used in metal mines or in coal mines where the coalbed has a steep pitch.
See also:stretcher
A tetragonal mineral, 4[PbWO4 ] ; dimorphous with raspite;
crystallizes in bipyramids; sp gr, 7.9 to 8.3; in oxidized zones
of tungsten deposits.