In Great Britain, tests of every type of apparatus are made in explosive
atmospheres before it is approved and allowed to use the official letters
F.L.P. (flameproof). Mason
A narrow band of crushed rock or clayey material found along a fault zone
or vein of ore. See also:breccia; gouge; selvage; pug. Also spelled
fluccan; flookan; flukan; floocan. Nelson
a. S. Wales. A furnace, such as a large coal fire at or near the bottom of
an upcast shaft for producing a current of air for ventilating the mine.
Fay
b. A tube or passageway in a steam boiler for hot gases or water
(depending on whether the boiler is a fire-tube or water-tube boiler).
c. A passage or channel through which the products of combustion of a
boiler or other furnace are taken to the chimney. CTD
d. Lanc. Shale. Arkell
Dust passing into the flues of a smelter or metallurgical furnace and
which, unless caught, passes out into the atmosphere. It is composed of
particles of unchanged or oxidized ore, volatilized lead that has been
converted into oxide, carbonate and sulfate ash, fuel, and volatilized
products of arsenic, zinc, bismuth, etc. Hess
An orthorhombic mineral, Al2 (PO4 )F2 (OH).7H2
O ; has one distinct cleavage; occurs with secondary iron phosphate
minerals in pegmatites. Formerly called kreuzbergite.
a. The quality, state, or degree of being fluid: a liquid or gaseous
state. CF:gas
b. The physical property of a substance that enables it to flow and that
is a measure of the rate at which it is deformed by a shearing stress, as
contrasted with viscosity: the reciprocal of viscosity.
Webster 3rd
c. In mineral transport, the term is not confined to liquids and slurries,
but is also used for finely divided solids that flow readily in air
currents, fluosolids reactors, or through dry ball mills. Pryor, 3
See:flow structure
a. See:flow texture
b. A metamorphic texture in which narrow stripes or lenticles of a
mineral, present as grains approx. 0.01 mm in diameter, are connected with
porphyroclasts of the same mineral and extend across regions in which
another mineral shows a dominantly mosaic texture. This texture has been
given a specific genetic connotation relating to superplasticity (Harte,
1977). AGI
A single or multi-stage reactor, generally used for gas-solid contacting,
in which the solid component is a reactant or a catalyst and is in a
continuous fluidized state. The gas is injected into the reactor to
provide rapid and uniform mixing for reactants to facilitate heat transfer
and completion of the reaction.
The number of feet of drilling fluid standing in a borehole while the
drill is operating and/or the number of feet of drilling fluid remaining
in a borehole with the drill string withdrawn. Long
A device for overcoming the starting resistance of a conveyor fed by a
constant-speed motor. It is used to allow the motor to reach full speed
before starting the conveyor. Nelson
See:fluid wash
A size-reduction unit depending for its action on collisions between the
particles being ground, the energy being supplied by a compressed fluid,
(e.g., air or steam) that enters the grinding chamber at high speed. Such
mills will give a product of 5 mu m or less; they have been used for the
fine grinding of frits, kaolin, zircon, titania, and calcined alumina, but
the energy consumed per ton of milled product is high. Dodd
A cavity, with or without negative crystal faces, containing one or two
fluid phases, and possibly one or more minute crystals, in a host crystal.
If two fluid phases are present, the vapor phase (bubble) may show
Brownian motion. See also:inclusion; negative crystal.
A coal dryer that depends on a mass of particles being fluidized by
passing a stream of hot air through it. As a result of the fluidization,
intense turbulence is created in the mass, including a rapid drying
action. The dry coal is withdrawn from the opposite side of the chamber.
Fine particles in the feed become entrained in the air and are recovered
in a cyclone, while the finest particles may need removal by dry filters
or wet scrubbers. The dryer has a high capacity and many are in use in the
United States. See also:cascade coal dryer; flash coal dryer;
thermal drying. Nelson
Oxidation of finely ground ore minerals by means of upward currents of
air, blown through a reaction vessel with sufficient force to cause the
bed of material to become fluid. Reaction between mineral and air is
maintained at a desired exothermic level by control of oxygen entry, by
admission of cooling water, or by added fuel. Fluidized beds are used in
the mineral industry for a number of concentrates, including copper, lead,
zinc, and carbonaceous gold ores.
The core barrelhead bearings and/or other rotating members in a drill
string cooled and lubricated by water or mud-laden fluid circulated as the
drilling fluid. Long
a. The force, expressed in pounds per square inch, exerted by the weight
of the column of drilling fluid measured at any given depth in a borehole.
CF:bottom-hole pressure
b. The pressure exerted by fluid contained in rock. AGI
Thirty-two ft3 (0.9 m3 ) of fluid. A unit to correspond
with the short ton of 2,000 lb (908 kg), and of sufficient accuracy for
many hydrometallurgical, hydraulic, and other industrial purposes, it
being assumed that the water or other liquid under consideration weighs
62.5 lb/ft3 (1,002.7 kg/m3 ). Fay
The amount of drilling fluid circulated through the drill string,
generally expressed in gallons per minute. Long
The wearing away of core and parts of a drill string or bit exposed to the
erosive forces of the rapid passage of the circulated drilling fluid. Also
called fluid cut. Long