Fuel-burning devices (usually oil or gas) intended for installation in a
wide variety of boilers or furnaces. Strock, 2
A number facilitating statement of units of one system in corresponding
values in another system. Pryor, 3
A furnace in which air is blown through a bath of molten metal or matte,
oxidizing the impurities and maintaining the temperature through the heat
produced by the oxidation reaction. Also used in converting copper matte.
ASM, 1; Fay
A person who supervises workers engaged in converting copper matte to
blister copper and directs activities concerned with charging converter,
blowing charge, pouring of slag and copper, casting of blister copper, and
removal of castings. DOT
A plant that incorporates into its structure an insoluble element from the
soil, and later, when the plant decays, returns that element to the soil
in a soluble form. AGI
In ore dressing, smelting, and refining, one who makes blister copper
(high-grade crude copper) by oxidizing iron and sulfur impurities in
copper matte, using a converter. DOT
The process of removing impurities from molten metal or metallic compounds
by blowing air through the liquid. The impurities are changed either to
gaseous compounds, which are removed by volatization, or to liquids which
are removed as slags. Kirk
A German process that cleans the coal and also reduces the moisture
content to about 10%. Heavy oil is added to a coal slurry containing 50%
to 60% water. On mixing, the coal particles become coated with oil and
hence resistant to water, whereas the shale particles remain uncoated and
easily wetted. By high-speed centrifuging the coal-oil mixture is retained
in the centrifuge while the shale particles pass out with the water. The
process is not as efficient as froth flotation. Nelson
a. A mechanical contrivance generally electrically driven, which extends
from a receiving point to a discharge point and conveys, transports, or
transfers material between those points.
b. The apparatus, belt, chain, or shaker, which, in conveyor mining, moves
coal from the rooms and entries to a discharge point or to the surface.
"Mother conveyors" are the conveyors that receive the coal from several
unit conveyors in rooms or entries. See also:underground mine conveyor;
transport; armored flexible conveyor; gate conveyor; shaker conveyor;
trunk conveyor. BCI
A ventilation stopping or separation door through which a conveyor has to
run. It consists of at least two well-built partitions, each with some
form of airlock designed to pass the belt and yet to reduce to a minimum
the leakage of air and the raising of dust. An airlock chute is sometimes
used. See also:box check
A chain used in the conveying medium of conveyors.
The downward slippage of a conveyor on an inclined face. With powered
supports, this movement is likely to cause ram damage. Anchor stations are
necessary to arrest conveyor creep. See also:stell prop
An appliance in which the coal or ore is moved through a chamber
containing hot gases on a perforated plate or a heavy mesh,
stainless-steel continuous belt. Nelson
A conveyor that follows a path, part of which is substantially horizontal
or on a slope less than the angle of slide of the material and part of
which is substantially vertical or on a slope steeper than the angle of
slide.
A specif. designed cable operated emergency stop switch for use with
conveyors or conveying systems that are used with a pull cord running
alongside or above the conveyor so that it may be reached from any point
along the conveyor. Persons falling against or on top of the conveyor will
pull on the cord and deactivate the conveyor movement. Best, 2
A longwall face on which the coal is loaded direct onto a face conveyor.
The coal may be loaded by hand or mechanically. The face conveyor delivers
its load of coal into tubs or cars or onto a gate conveyor. Nelson
See:mill feeder
a. Conveyor that at its extremity has a digging head that moves with the
conveyor and works its way under the coal, which, by the unequal shaking
of the conveyor, is carried back to the car. Also called shaking-conveyor
loader. Zern
b. One who loads on a conveyor. See also:loader
a. Person who sets up and tends chain, belt, or shaker (reciprocating)
conveyors to transport coal or metal ore about a tipple at the surface
from working the working face in a mine. Also called loading-boom
operator. DOT
b. In the quarry industry, a person who tends an endless conveyor belt
used to transport rock from the crusher to storage bins. Syn:beltman
DOT
See:tripper man
A conveyor designed to transport material along a line of troughs by means
of a reciprocating or shaking motion. See also:shaker conveyor