a. The illuminating power of a standard sperm candle. Used as a measure
for other illuminants. Crispin
b. The luminous flux emitted by a source of light per unit solid angle in
a given direction. It is expressed in terms of the international candle
and new candle. CTD
See:cannel coal
a. This name was first given to an isometric silver sulfogermanate,
believed to be a new species, but later proved to be identical with
argyrodite. The name was then withdrawn and transferred to (b).
English
b. An orthorhombic mineral, Ag8 SnS6 ; black; forms a series
with argyrodite.
An etchant, used for revealing phosphorus segregation in iron and steel,
containing 1.5 g cupric chloride, 5 g nickel nitrate, and 6 g ferric
chloride, in 12 mL hot water. Osborne
a. Braz. A tough, well-consolidated rock consisting essentially of hard
blocks and fragments of the rocks of an iron formation, cemented with
limonite. Where these fragments are plentiful and are derived from the
hard ore outcrops, canga forms a valuable ore, which may run as high as
68% iron. Generally it is phosphoric, but there are considerable areas in
which the phosphorus is below the Bessemer limit. CF:itabirite
b. A ferruginous laterite developed from any iron-bearing rock, commonly
basalt or gabbro; e.g., as used in Sierra Leone, canga is equivalent to
lateritic iron ore. AGI
A method of hoisting in shallow lead-zinc mines in areas of the United
States. Instead of the conventional engine house, operation is controlled
at the top of the shaft. The onsetter below hooks the can on, then signals
by a lamp attached to the wrist of the hoister sitting above. The can is
hoisted, swinging free. At the surface a tail rope is snapped to the
underside, a deflection plate is swung into place, and the can is lowered.
It capsizes and discharges its load to the surge bin. The empty can is
then again hoisted, freed of its tail rope, and wound down the shaft,
where it is replaced by a full can. Pryor, 3
a. A hopper-shaped truck, from which coal is discharged into coke ovens.
Fay
b. A container with a filter, sorbent, or catalyst, or combination of
these items, which removes specific contaminants from the air passed
through the container. Also called cartridge. ANSI
a. York. A completely cemented, compact, and fine-grained sandstone, or
any fine-grained rock that is hard to drill.
b. A hard, dark gray massive rock consisting largely of ankerite, found in
some Coal Measures marine beds. BS, 11
a. Eng. The ocherous sediment in mine waters, being bicarbonate of iron
precipitated by the action of the air. Fay
b. Rust; verdigris, or copper rust. Webster 2nd
See:cannel coal
a. Term used for sapropelic coal containing spores, in contrast to
sapropelic coal containing algae, which is termed boghead coal. Viewed
microscopically, cannel coal shows no stratification. It is generally dull
and has a more or less pronounced waxy luster. It is very compact and
fractures conchoidally. There are transitions between cannel coal and
boghead coal, and it is not possible always to distinguish macroscopically
between them. Such a distinction can, however, be easily made a with
microscope, except in high-rank coals. In American nomenclature, cannel
coal must contain less than 5% anthraxylon. Cannel coal occurs in layers
or lenses up to several centimeters in thickness. Thin seams consisting
entirely of cannel coal are known. It occurs widely but in limited
amounts. Syn:gayet
See also:sapropelic coal; spore coal; boghead coal. IHCP
b. A variety of bituminous or subbituminous coal of uniform and compact
fine-grained texture with a general absence of banded structure. It is
dark gray to black in color, has a greasy luster, and is noticeably of
conchoidal or shell-like fracture. It is noncaking, yields a high
percentage of volatile matter, ignites easily, and burns with a luminous
smoky flame. Syn:canel; cannel; candle coal; kennel coal.
a. A shale in which the mineral and the organic matter are approx. in
equal proportions. Tomkeieff
b. A black shale formed by the accumulation of sapropels accompanied by a
considerable quantity of inorganic material, chiefly silt and clay.
Syn:bastard shale
Same as griotte marble; a reddish marble with white spots formed by fossil
shells (goniatites). Hess
A mill for grinding tough materials by attrition, using cannonballs in a
rotating drum or chamber. See also:ball mill
See:blown-out shot
Corn. Applied to lodes containing calcium carbonate and fluorspar.
See:canyon
Hydrated Brazilian hematite ore resulting from the weathering of
itabirite. Osborne
A lever-type beam that is held down at one end, is supported near the
middle, and supports a load on the other end. Nichols, 1
A transporter crane with one or both ends overhanging. Hammond
Grizzly fixed at one end only, the discharge end being overhung and free
to vibrate. This vibration of the bar is caused by the impact of the
material. The disadvantage of the ordinary bar grizzly is clogging due to
the retarding effect of the cross rods. This has been overcome in the
cantilever grizzly by eliminating the tie rods except at the head end,
where they are essential. The absence of these rods below the point of
support also aids in preventing clogging because it permits the bars to
vibrate in a horizontal plane, which keeps the material from wedging.
Pit and Quarry