Copaux-Kawecki fluoride process
A process for converting beryl to beryllium oxide by sintering a mixture
of beryl, soda ash, sodium silicofluoride, and sodium ferric fluoride,
leaching with hot water, and adding caustic soda to precipitate beryllium
hydroxide, which is calcined to beryllia. USBM, 7
a. Derb. To contract to mine lead ore by the dish, load, or other measure.
Fay
b. An exchange of working places between miners. Also spelled coup.
Zern
c. Derb. A duty or royalty paid to the lord or owner of a mine.
Fay
d. Eng. A superficial deposit covering or coating the substrata. A cold,
stiff, and wet clay. Arkell
e. The upper or topmost section of a flask, mold, or pattern.
ASM, 1
An alloy containing 55% copper and 45% nickel; used for thermocouples.
Newton, 1; Newton, 2
Derb. One who contracts to mine lead ore at a fixed rate; a miner.
A name for gypsum, generally in weathered state.
a. A triclinic mineral, Fe2+ Fe3+4 (SO4 )
6 (OH)2 .20H2 O ; Syn:ferrocopiapite;
yellow copperas; ihleite; knoxvillite.
b. The mineral group aluminocopiapite, calciocopiapite, copiapite,
cuprocopiapite, ferricopiapite, magnesiocopiapite, and zincocopiapite.
Syn:ihleite
a. Cutting and trimming marble or other stone by use of a grinding wheel.
b. The top or cover of a wall usually made sloping to shed water.
c. In quarrying, the process of cutting one slab into two without regard
to the finish of the edges. AIME, 1
d. The material or units used to form a cap or finish on top of a wall,
pier, or pilaster to protect the masonry below from the penetration of
water from above. ACSG, 1
e. Shaping stone or other hard nonmetallic material by use of a grinding
wheel. ACSG, 2
A machine consisting of a gearing and a carborundum wheel for cutting and
trimming marble slabs. Fay
The process of moving the head of a theodolite laterally until its
vertical axis lies in the produced vertical plane common to two
plumblines. Syn:alignment
See:cupel
a. A reddish metallic element that takes on a bright metallic luster and
is malleable, ductile, and a good conductor of heat and electricity.
Symbol, Cu. Occasionally occurs native, and is found in many minerals such
as cuprite, malachite, azurite, chalcopyrite, and bornite. Its alloys,
brass and bronze, are very important; U.S. coins are now copper alloys.
Its oxides and sulfates are used as an agricultural poison and as an
algicide in water purification. Handbook of Chemistry and Physics, 3
b. An isometric native metal Cu ; metallic, red, soft, ductile and
malleable; sp gr, 8.9; in oxidized zones of copper deposits, formerly a
major source of native copper; the only native metal to occur abundantly
in large masses; commonly occurs in dendritic clusters or mossy
aggregates, sheets, or in plates filling narrow cracks or fissures.
See also:native copper
See:melanterite; copiapite; goslarite; coquimbite.
A sulfate of iron and copper resulting from the decomposition of copper
pyrites. Standard, 2
Syn. for pyrite, from which copperas is often made. Fay
Bol. Native copper in granular form mixed with sand. See also:coro-coro;
barilla. Fay
A metallic product of very indefinite composition, made (usually) in
reverberatory furnaces by smelting rich cupriferous substances without
sufficient sulfur to quite satisfy the copper present. Fay
See:chalcanthite
A laborer who compresses copper scrap into bales for use in charging
refining furnaces, by operating a hydraulic ram. DOT
A metallurgical process for recovering copper from low-grade complex ores
in which a mixture of the ore and a small quantity of salt and coke are
heated, and the oxides or sulfides reduce to metal that migrates or
segregates in the form of thin films or flakes. These are later recovered
by conventional flotation procedures.
Any one of several indicator plants that serve as guides when prospecting
for copper ores.
See:chalcocite