Temperature indicated by a conventional dry thermometer; a measure of the
sensible heat content of air. Hartman, 2
Coal from which impurities have been removed mechanically without the use
of liquid media. BS, 4
The cleaning of coal or ore by air currents as opposed to wet cleaning by
water currents. Appliances for the dry cleaning of coal were first
introduced about 1850 and since that date a variety of methods have been
developed. See also:Kirkup table
An apparatus in which drycleaning is achieved by the application of air
currents and agitation to a layer of feed of controlled depth on the table
surface. See also:Kirkup table
Underpoled copper from which oxygen has been insufficiently removed when
refining, so that it is undesirably brittle when worked cold or hot.
Pryor, 3
See:carbonitriding
See:alluvial cone; alluvial fan.
The weight of a unit volume of a dry sample of soil, after the latter has
been heated at a temperature of 103 degrees C. Hammond
The relationship between the density of a sample of soil in a dry state
and its moisture content for a given degree of compaction. Such
relationship can be determined from a curve that will reveal the optimum
moisture content. Hammond
a. Placers not subject to overflow.
b. Placer mines or other mining districts where water is not available.
Standard, 2
See:destructive distillation; pyrolysis.
Drilling operations in which the cuttings are lifted away from the bit and
transported out of a borehole by a strong current of air or gas instead of
a fluid. CF:dry running
Compressed-air drill that traps and removes drilling dust instead of
sludging it with added water. Pryor, 3
An apparatus for drying coal. Dryers are of various types, such as
revolving kilns, flash, and fluidized bed. See also:coal dryer;
dehydrator.
A condition often appearing in wire rope and often caused by shock loads
in winding. These shock loads are produced by picking up the cage from the
pit bottom with slack chains or by lifting heavy pithead gates or covers.
Sinclair, 5
A process in which steel is fluxed in hot ammonium chloride and
subsequently dried by hot air before being passed through a bath of molten
zinc. Hammond
Any process of reducing particle size without the liquid medium.
See also:grinding
A drill hole in which no water is used for drilling, as a hole driven
upward. See also:blank hole
See:changehouse
Solid carbon dioxide.
A test for detecting glass imitations; if a crystalline substance such as
a gem mineral is placed on a piece of dry ice (solid CO2 ), a
squeaking noise can be heard. This is not true of noncrystalline
substances such as glass or plastic.