Volumetric ratio of oxygen to the total gases in a mixture.
Van Dolah
A device made up of a welding oxygen bottle and a length of rubber hose
attached to a valve which is fitted to a steel pipe, so that when the tip
of the lance is ignited it can be used to melt the solidified metal out of
the iron tap hole in a blast furnace.
A process for making steel in which oxygen is blown upon or through molten
pig iron, whereby most of the carbon and impurities are removed by
oxidation. Harbison-Walker
The use of oxygen instead of air to convert molten pig iron into steel.
The oxygen is used in different ways in different furnaces, but the
fastest ones utilize the direct oxidation effects of a relatively pure
(99.5%) oxygen. See also:L
A hornblende with (OH+F+Cl) less than 1.0. Also called basaltic
hornblende. Syn:lamprobolite
Of, relating to, or utilizing a mixture of oxygen and hydrogen.
Webster 3rd
A blowpipe in which hydrogen is burned in oxygen. Streams of the two gases
in the proportion to form water are forced under pressure from separate
reservoirs, and issue together from a jet, igniting just as they issue.
The temperature produced which has been estimated at 5,000 degrees F
(2,760 degrees C), is sufficient to fuse very refractory substances. Also
called compound blowpipe. Standard, 2; Fay
A former name for maghemite, isometric Fe2 O3 ; also called
ferromagnetic ferric oxide.
See:lithophile
A white, massive variety of thomsonite, from Arkansas. Fay
A mineral paraffin wax, of dark yellow, brown, or black color with a
melting point of 55 to 110 degrees C and sp gr, 0.85 to 0.95. Is soluble
in gasoline, benzene, and turpentine and is found near the Caspian Sea
region and in Utah as narrow seams in sandstone. Also called mineral wax;
fossil wax; native paraffin; earth wax. Also spelled ozokerite.
Syn:ader wax; earth wax; mineral fat. See also:fibrous wax
CF:hatchettine; hatchettite. CTD
An allotropic, triatomic form of oxygen, O3 ; a faintly blue,
irritating gas with a characteristic pungent odor, but at -112 degrees C
it condenses to a blue magnetic liquid. It occurs in minute quantities in
the air near the Earth's surface and in larger quantities in the
stratosphere as a product of the action of ultraviolet light of short
wavelengths on ordinary oxygen. Ozone is generated usually in dilute form
by a silent electric discharge in oxygen or air. It decomposes to oxygen
(as when heated) and it is a stronger oxidizing agent than oxygen. Used
chiefly in disinfection and in deodorization (such as in water
purification and in air conditioning), in oxidation and bleaching (such as
in the treatment of industrial wastes), and in ozonolysis (such as in the
manufacture of azelaic acid from oleic acid). Webster 3rd
Electrical apparatus that converts atmospheric oxygen to ozone; used in
sterilizing water for drinking purposes and for purifying air.
Pryor, 3
A monoclinic mineral, NaCaAlF6 .H2 O ; white; distinct
cleavage; dimorphous with thomsenolite; an alteration of cryolite.
A cylindrical tank with a conical bottom. It contains a pipe that is
coaxial with the leaching tank and open at both ends; compressed air is
introduced at the lower end of this pipe, which behaves as an air lift.
The density of the pulp within the pipe is less than that of the pulp
surrounding it because of the column of air bubbles contained in the pipe,
and the pressure of the denser pulp causes the pulp in the central pipe to
rise and overflow, thus circulating the entire charge.
Syn:Brown agitator; Brown tank. See also:Patterson agitator
Newton, 1
One of two large groups of igneous rocks, characterized by calcic and
calc-alkalic rocks. Harker (1909) divided all Tertiary and Holocene
igneous rocks of the world into two main groups, the Atlantic suite and
the Pacific suite. Because there is such a wide variation in tectonic
environments and associated rock types in the areas of Harker's Atlantic
and Pacific suites, the terms are now seldom used to indicate kindred rock
types. CF:Mediterranean suite
An iron arsenosulfide near arsenopyrite in composition.
a. A pillar, constructed from loose stones and dirt, built in the waste
area or roadside to support the roof. See also:double packing;
solid stowing; strip packing. Nelson
b. A pack built on a longwall face between the gate-side packs is called
an intermediate pack. SMRB
c. Waste rock or timber support used for a roof over underground workings
or used to fill excavations. Also called fill. Pryor, 3
d. To cause the speedy subsidence of ore in the process of washing by
beating a keeve or tub with a hammer.
a. Person who builds packs or pack walls. See also:pack
b. In anthracite and bituminous coal mining, a worker who: (1) fills
worked-out rooms, from which coal has been mined, with rock, slate, or
other waste to prevent caving of walls and roofs; (2) builds rough walls
and columns of loose stone, heavy boards, timber, or coal along
haulageways and passageways and in rooms where coal is being mined, to
prevent caving. Also called packer. See also:pillar man; timber packer;
waller. DOT
See:methane drainage
In anthracite and bituminous coal mining, a laborer who draws (tears down)
stone or timber packs (pillars constructed by pack builders in the working
place to support the roof during extraction of coal) to permit the roof to
cave behind as the mining of the coal recedes toward the entrance of the
working area. DOT