A mill in which a wet process is employed. Fay
See:wet-pan operator
a. A system of mining in which water is sprayed into the air at all points
where dust is liable to be formed, and no attempt is made to prevent the
air from picking up moisture. It therefore soon becomes saturated and
remains so throughout the ventilation circuit. Spalding
b. Mining for salt and other water soluble minerals as brine rather than
in the dry state. Kaufmann
See:clay maker
Person who adds water to mixture, in addition to clay, shale, or brick, in
grinding pans in order to make it plastic. May be designated according to
clay ground in pans, such as silica-wet-pan charger.
Syn:wet-pan feeder
See:wet-pan charger
Person who tends and supervises loading of wet pans used for grinding and
tempering clay, performing essentially the same duties as described under
dry-pan operator. Syn:clay temperer; wet-mill man. DOT
Person who works as a member of a crew performing any one or a combination
of duties concerned with extracting cadmium, lead sulfate, and zinc oxide
from dust recovered in Cottrell precipitators. DOT
A metallurgical process in which the valuable contents of an ore are
dissolved by acid or other solvents; a leaching or lixiviation process.
Opposite of dry process. See also:wet method
The ordinary process of puddling in which a furnace is lined with material
rich in oxide of iron. Fay
a. Timber decay set up when mine props have not been treated with zinc
sulfate, etc., and are exposed to alternations of moisture and drying out.
Pryor, 3
b. Timber decay caused by alternating wet and dry periods.
The addition of water to a screen to increase its capacity and improve its
sizing efficiency. Water may be introduced either by adding it to the feed
stock or by spraying it over the material on the screen deck. The latter
method is also used in rinsing or washing ores, etc., to recover minerals.
Nelson
A term used in connection with coal washing or other processes using
fluid. See also:coal-preparation plant; washery. Nelson
An American Society for Testing and Materials standard method of test,
recommended for determining the grain sizing of materials in which slaking
would occur.
An instrument for assessing climatic conditions in mines, such as wet- and
dry-bulb temperatures, air velocity, barometric pressure, and radiation.
The field of usefulness of the instrument is limited to mines where the
workers are normally sweating freely and wear few clothes.
Roberts, 1
The ability of a liquid to form a coherent film on a surface, owing to the
dominance of molecular attraction between the liquid and the surface over
the cohesive force of the liquid itself. AGI
Sulfur treated so that it is easily dispersed in water. USBM, 7
The total length of surface in a channel or pipe that is in actual contact
with water. See also:hydraulic mean depth
Originally, only guhr dynamites to which were added salts containing water
of crystallization, such as Glauber's salts, ammonium oxalate, etc., with
the view of making them available in mines containing combustible gases.
Fay
A phenomenon involving a solid and a liquid in such intimate contact that
the adhesive force between the two phases is greater than the cohesive
force within the liquid. Thus, a solid that is wetted, on being removed
from the liquid bath, will have a thin continuous layer of liquid adhering
to it. Foreign substances, such as grease, may prevent wetting. Addition
agents, such as detergents, may induce wetting by lowering the surface
tension of the liquid. CF:water break
a. A reagent to reduce the interfacial tension between a solid and a
liquid, so facilitating the spreading of the liquid over the solid
surface. BS, 5
b. A chemical promoting adhesion of a liquid (usually water) to a solid
surface. Pryor, 2
c. See:plasticizer
d. Substance that lowers the surface tension of water and thus enables the
water to mix more readily with other substances and so facilitates the
spread of the liquid over a solid surface. BS, 5