A fossil resin from the brown coal near Bonn, Germany; it ranges in color
from golden yellow to brownish red, and is partly soluble in alcohol and
ether. Fay
The floor of a pot furnace, often called bench.
An isometric mineral, (Ni,Co)3 S4 ; linnaeite group.
A metallurgical process for the recovery of copper. Copper sulfides are
dissolved by solutions of ferric sulfate containing free sulfuric acid,
and the solution is then electrolyzed in a tank having a diaphragm. Copper
is deposited, and ferric sulfate is regenerated. Liddell
A process for making wrought iron directly from iron ore, without the
previous production of pig iron. Standard, 2
A reverberatory furnace, heated by gas, with the aid of regenerators.
Fay
A highly refractory material, produced by the fusion of chromite, bauxite,
and magnesite, in an open electric arc furnace. Osborne
The production of steel in a reverberatory furnace by oxidation of the
impurities by oxides added (either the rust on scrap, mill scale, or pure
ores). It may be conducted on either acid or basic lining.
See also:open-hearth process
A furnace used for the manufacture of producer gas. Fay
A Silesian zinc-distillation furnace employing the Siemens system of heat
recuperation. Fay
a. A brownish orange-yellow clay colored by iron and manganese oxides;
used as a pigment.
b. See:mineral paint
a. A high range of hills or mountains, esp. one having jagged or irregular
peaks that when projected against the sky resemble the teeth of a saw;
e.g., the Sierra Nevada in California. The term is often used in the
plural, and is common in the Southwestern United States and in Latin
America. Syn:serra
b. A mountainous region in a sierra. Etymol: Spanish, saw, from Latin
serra, saw. AGI
A diamond from the Sierra Leone District in Africa. Long
a. A laboratory vessel, the bottom of which is a woven-wire screen, used
to separate soil or sedimentary material according to the size of its
particles; it is usually made of brass, with the wire-mesh cloth having
regularly spaced square holes of uniform diameter. CF:screen
AGI
b. The screen or grating fixed in a stamp box.
c. Vessel, the bottom of which is porous, with apertures of defined size
and shape, allowing contents to be retained as oversize or sieved through
as undersize. The chief sieve systems used in laboratory work are rings 8
in (20.3 cm) in diameter with woven wire cloths so specified.
Pryor, 3
d. This term is generally reserved for testing equipment; the
corresponding industrial equipment is generally called a screen. There are
several standard series of test sieves; those most frequently met with in
the ceramic industry are British standard sieves (conforming with B.S.
410), United States standard sieves (conforming with National Institute of
Standards and Technology LC-584 or ASTM-E11), French standard sieves
(AFNOR NF 11-501), and German standard sieves (DIN 4188). In Tyler sieves,
the ratio between the mesh sizes of successive sieves in the series is 2;
thus, the areas of the openings of each sieve are double those of the next
finer sieve. Dodd
Determination of the particle-size distribution in a soil, sediment, or
rock by measuring the percentage of the particles that will pass through
standard sieves of various sizes. Syn:sieve classification
Stationary screen with close-spaced wedge wire bars across wet pulp feed,
set around arc of circle. Pryor, 3
The separation of powder into particle size ranges by the use of a series
of graded sieves. Syn:sieve analysis
In powder metallurgy, that portion of a powder sample that passes through
a standard sieve of specified number and is retained by some finer sieve
of specified number. ASM, 1
a. Standard opening in sieve or screen, defined by four boundary wires
(warp and woof). The laboratory mesh is square and is defined by the
shortest distance between two parallel wires as regards aperture (quoted
in micrometers or millimeters), and by the number of parallel wires per
linear inch as regards mesh. Sixty mesh equals 60 wires/in (152 wires/cm).
Pryor, 3
b. The length of the side of a hole in a sieve. See also:mesh
Fay
Term applied to the list of screen apertures, taken in order from the
coarsest to the finest. Pit and Quarry
Mechanized devices on which a nest of laboratory sieves can be shaken or
electrically vibrated during the size analysis of sands. Pryor, 3