The process for the production of iron and steel from medium-grade ores,
such as those containing 44% to 57% iron and having a high silicon
content. The process involves a continuous reduction and is carried out in
a revolving tube furnace, which is designed for the production of iron.
The iron is reduced into a sponge and then converted into low-carbon
metallic grains, which are called pellets.
The removal of silicon and phosphorus from molten pig iron by running it
into a Pernot furnace lined with iron oxides. Iron ore may also be added,
and the bath is agitated by rotation for 5 to 8 min only.
See:Krupp process
Fay
See:aphanite
An orthorhombic mineral, MnFe2 (PO4 )2 (OH)2
.H2 O ; an oxidation product of phosphoferrite; forms a series with
garyansellite.
See:K.T.A.M. double-tube auger.
A double-tube soil-sampling device designed to be rotated by hand to
obtain soil samples from relatively shallow depths. The inner tube is a
swivel type, and its cutting end leads the bottom of the spiral on the
outside of the outer tube. Long
Specially shaped hoe used for working gravel in the sluice in Japan.
Fay
See:culm
A variety of grahamite from Estonia. Distinguished by the brown color of
its powder and its greater solubility in turpentine and chloroform.
English; Tomkeieff
See:kankar
A gem variety of spodumene; lilac, transparent. Syn:lithia amethyst
A dark-colored shale once worked for copper in Germany.
A triclinic mineral, (K,Na)3 (Mn,Fe)7 (Ti,Nb)2 Si
8 O24 (O,OH)7 ; astrophyllite group; forms series with
astrophyllite and with cesium kupletskite.
See:cuprojarosite
A triclinic mineral, MbB3 O3 (OH)5 .5H2 O ;
dimorphous with inderite.
In Japan, black ore. The kuroko deposits consist of intimately mixed
zincblende, galena, and barite, associated (in places) with large masses
of pyrite and gypsum. Hess
In statistics, the technical name describing peakedness of a frequency
distribution. It is statistically measured as the coefficient of quartile
kurtosis.
A trigonal mineral, 2[Ca(Mn,Mg,Ca,Fe)(CO3 )2 ] ; dolomite
group; in carbonate veins. Also spelled kutnahorite.
A packsack to be swung on either side of a packsaddle. Webster 3rd
A triclinic mineral, 4[Al2 SiO5 ] ; trimorphous with
andalusite and sillimanite; in blades that are distinctly harder across
than along; a common rock-forming mineral in schist and gneiss. Also
spelled cyanite. Syn:disthene; sappare.