Forgings formed from wrought-iron scrap. Standard, 2
In the iron and steel industry, one who operates a skip hoist to carry
scrap material to the furnaces. DOT
Mica that because of size, color, or quality is below specifications for
sheet mica. Includes flake mica and the mica, except sheet, obtained from
pegmatite mining as a sole product or as a byproduct, from the preparation
of sheet mica, and from waste in fabricating sheet mica. Skow
A person employed on the slag dump to pick out pieces of iron carried to
the dump in slag ladles. Fay
Lifting coal that has been left by an undercutting machine. Zern
In metallurgy, a laborer who sorts scrap metal and removes foreign matter
preparatory to use in recasting. DOT
A calcareous, earthy, or strong substance that separates from seawater in
boiling it for salt. See:striation
A pan in saltworks to receive the scratch. Fay
A joint from which air leaks and makes a screaming noise. Compressed air
escaping at a screaming joint or hole in an air hose can be the cause of a
mine fire. Sinclair, 1
A sieve, screen, or strainer; a coal screen. See also:talus
Scot. Bars of which a scree is constructed. See also:scree
a. A large sieve for grading or sizing coal, ore, rock, or aggregate. It
consists of a suitably mounted surface of woven wire or of punched plate;
it may be flat or cylindrical, horizontal or inclined, stationary,
shaking, or vibratory, and either wet or dry operation.
See also:Bradford breaker; shaking screen; stationary bar screen;
vibratory screen. Nelson
b. A cloth brattice or curtain hung across a road in a mine to direct the
ventilation. See also:brattice
c. A perforated sheet placed in the gating system of a mold to separate
dirt from molten metal. ASM, 1
a. The size distribution of noncohering particles as determined by
screening through a series of standard screens. Harbison-Walker
b. See:sieve analysis
c. The percentage of a sample retained on each size of a series of
standard laboratory screens. Nelson
d. Determination of the particle-size distribution of a soil, sediment, or
ore by measuring the percentage of the particles that will pass through
standard screens of various sizes. Syn:grading test
A container in which diamond screens are inserted and in which the
material (diamond particles) that passes through a sieve or screen
collects and is retained. Long
A discharge chute equipped with a screen section, either stationary or
vibrating, to remove the finer portions of the material being handled from
the major line of flow.
A woven medium suitable for use in a screen deck. BS, 5
A surface provided with apertures of specified size for carrying out the
operation of screening. BS, 5
Coal that has passed over any kind of a screen and therefore consists of
the marketable sizes.
Lump lime after forking or screening to remove the finer portion. The
portion removed is usually that which will pass a 1/2-in sieve.
A flexible cable provided with a protective screen or screens of tinned
copper wire, or other conducting material, applied (1) to enclose each
power core separately (individual screening), or (2) to enclose all the
cores of the cable (collective screening). BS, 13
a. The separation of solid materials of different sizes by causing one
component to remain on a surface provided with apertures through which the
other component passes. BS, 5
b. Use of one or more screens (sieves) to separate particles into defined
sizes. Also called sizing. See also:sieving