A byproduct coke oven having two outer zones in the heating system and one
double inner zone. In this oven, the gas is alternately burned upwards in
the two outer zones with the products of combustion being carried down
through the double inner zone and, on reversal, burned upwards in the
double inner zone with the products of combustion being carried down
through the two outer zones. Known as a double-divided oven. Camp
a. A purplish-red material consisting of an aluminosilicate of magnesium
and potassium; represents an altered scapolite. AGI
b. A tuff composed of fragments of pumice and andesite in a matrix of
vitric and granular material (Holmes, 1928). AGI
Automatic arrangement that arrests a mine car when it runs away downslope.
The car displaces a pendulum beyond its nonactivating limit of swing and a
pivoted rail then falls between the rail tracks below. Pryor, 3
a. A green variety of grossular garnet.
b. A greenish variety of vesuvianite.
a. To extract ore or coal. To mine, to develop, to prepare for mining.
b. To recover (as metal) from ore. Webster 3rd
a. A small hand- or power-operated drum haulage used for light-duty work
in surface and underground mines. A heavy-duty power winch fitted to the
rear of a tractor. See also:pickrose hoist
b. Syn:hoist
of a horizontal drum with rank handles. Long
c. A drum that can be rotated so as to exert a strong pull while it is
winding the attached line. Nichols, 1
d. A small drum haulage or hoist. A gear train is interposed between the
handle and the drum. The handle is turned several revolutions to one
revolution of the drum. Two handles and a pawl and ratchet may be fitted
to prevent the load from running back should the pressure on the handle be
reduced. See also:monkey winch
See:mesolite
In metal mining, a person who operates a power-driven winch on a gold
dredge to move it from one working position to another during dredging
operations, winding up the cables anchored at points in advance of the
dredge. DOT
See:hoist operator
To hoist or raise coal or ore; to spool rope or cable on the drum of a
hoist.
A beam incorporated into a structure for the sole purpose of resisting
wind pressure. Hammond
A blown-out or "windy" shot. Fay
In blast furnace operation, the compartment in the bottom of the converter
that receives the blast and delivers it to the tuyeres.
Mersereau, 2
a. An electrically driven winding engine for hoisting a cage or cages up a
vertical mine shaft. CTD
b. See:card tender
An appliance or piece of equipment capable of retarding or stopping cages
in a shaft in an emergency. See also:brake; post brake;
semiautomatic control. Nelson
Any form of furnace using the natural draft of a chimney without the aid
of a bellows or blower. Fay
An anemometer for testing the velocity of air in mines.
In mining, an excavation or opening for removing ore. Standard, 2
The operation of hoisting coal, ore, miners, or materials in a shaft. The
conventional method is to employ two cages actuated by a drum type of
winding engine. Steel ropes are attached at either end of the drum, one
over and the other under it, so that as one cage ascends, the other
descends. Thus the cages arrive at pit top and bottom simultaneously.
See also:automatic cyclic winding; balanced winding; balance rope;
deep winding; Koepe winder; winding cycle; winding rope. Nelson
The machinery and equipment used to lower and raise loads through a shaft.
Nelson
In general, a cycle refers to any series of changes or operations in which
any part of the system return to its original state or position. In
winding, the term usually refers to a complete wind, which is comprised of
three phases: (1) acceleration to full speed; (2) full-speed running; and
(3) retardation to rest. The period of the winding cycle is the sum of
winding time and decking time in seconds. See also:winding speed
Nelson