A metallic sulfide mixture made by melting the roasted product in smelting
sulfide ores of copper, lead, and nickel. ASM, 1
Weight of matte expressed as a percentage of the total charge.
Newton, 1
The smelting of copper-bearing materials, usually in a reverberatory
furnace. The valuable product is a liquid, copper-iron sulfide called
matte. Kirk
The process of smelting sulfide ores into matte. Weed, 2
a. A miner's pickax. Fay
b. An implement that combines the features of an adz, ax, and pick, and is
used for digging, grubbing, and chopping. Webster 3rd
Colorless to faintly smoky gem-quality zircon from the Matara (Matura)
district of Sri Lanka; any smokiness is removable by heating.
a. Pertaining to the stage of maturity of the cycle of erosion; esp. said
of a topography or region having undergone maximum development and
accentuation of form; or of a stream (and its valley) with a fully
developed profile of equilibrium; or of a coast that is relatively stable.
AGI
b. Said of a clastic sediment that (1) has been differentiated or evolved
from its parent rock by processes acting over a long time and with a high
intensity and (2) is characterized by stable minerals (such as quartz),
deficiency of the more mobile oxides (such as soda), absence of
weatherable material (such as clay), and well-sorted but subangular to
angular grains. Example: a clay-free mature sandstone on a beach.
AGI
a. A stage in the development of a coast that is characterized by
straightening of the shoreline by bridging of bays and cutting back of
headlands so as to produce a smooth, regular shoreline consisting of
sweeping curves; and, eventually, retrogradation of the shore beyond the
bayheads so that it lies against the mainland as a line of eroded cliffs
throughout its course. AGI
b. The extent to which a clastic sediment texturally and compositionally
approaches the ultimate end product to which it is driven by the formative
processes that operate upon it. AGI
c. The stage in the development of a stream at which it has reached its
maximum efficiency, having attained a profile of equilibrium and a
velocity that is just sufficient to carry the sediment delivered to it by
tributaries. AGI
d. The second of the three principal stages of the cycle of erosion in the
topographic development of a landscape or region, intermediate between
youth and old age (or following adolescence), lasting through the period
of greatest diversity of form or maximum topographic differentiation,
during which nearly all the gradation resulting from operation of existing
agents has been accomplished. AGI
A measure of the progress of a clastic sediment in the direction of
chemical or mineralogic stability; e.g., a high ratio of alumina-soda, of
quartz-feldspar, or of quartz + chert-feldspar + rock fragments indicates
a highly mature sediment. AGI
A tetragonal mineral, Ni11 As8 ; forms tabular crystals;
occurs in nickel-cobalt-native-silver ore deposits. Syn:placodine;
temiskamite.
A cutter loader similar to an Anderton shearer except that the drum is
replaced by a frame jib 42 in (107 cm) high and 20 in (51 cm) deep. The
machine travels on an armored flexible conveyor at a speed of about 4-1/2
ft/min (1.4 m/min). It cuts a 20-in (51-cm) web on the cutting run, and
the plow deflector loads the cut coal onto the conveyor. On the reverse
run, the deflector loads all the loose coal left on the track, and the
conveyor is snaked over behind the machine. The loader is suitable for
medium-thickness seams, and the yield of large coal is good.
Nelson
In soil tests, the maximum density is found by compacting soil with a
Kango hammer; the minimum density is measured by pouring soil into a
container of known capacity. This test is useful for determining the
relative density of sands, by comparison with field tests. Hammond
The maximum angle at which a conveyor may be inclined and still deliver a
predetermined quantity of bulk material within a given time. As the
maximum angle is approached, the rate of handling of bulk material is
usually decreased.
The slope beyond which the material on a conveyor tends to roll downhill.
The maximum slope on which a conveyor can operate depends on (1) the
material carried, (2) the loading or feeding efficiency, (3) the size and
type of belt, and (4) the environment. In general, in the case of
run-of-mine coal and ore, belt conveyors can operate up to about 18
degrees . If the material conveyed contains large lumps, spillage may
result if the belt is too narrow. Nelson
The total of the starting and operating tensions. In the average conveyor
this is considered to be the same as the tight side tension.
maximum carbon dioxide content
The recommended maximum allowable concentration of carbon dioxide in mine
air is 0.5%. Hartman, 1
maximum charge weight per delay
The maximum quantity of explosive charge detonated on one interval (delay)
within a blast. The charge detonated within any 8-ms interval over the
entire duration of the blast.
Upper limit of electric power that may be drawn at any time from the mains
without penalty, as agreed by contract. Pryor, 3
The dry density obtained by the compaction of soil at its optimum moisture
content. Hammond
Microcline with the most complete ordering possible of aluminum and
silicon ions in the tetrahedral sites and the smallest angle for beta
(maximum triclinicity). CF:mesomicrocline