a. An orthorhombic mineral, (Fe,Ni,Co)3 C ; an accessory in iron
meteorites.
b. An iron carbide phase in steel. See also:cementite
Property of like mineral grains that enables them to cling together in
opposition to forces tending to separate them. CF:adhesion
Hess
a. A soil that when unconfined has little or no strength when air-dried,
and that has little or no cohesion when submerged. ASCE
b. A frictional soil, such as sand, gravel, or clean silt. Nelson
a. A soil that when unconfined has considerable strength when air-dried,
and that has significant cohesion when submerged. ASCE
b. A sticky clay or clayey silt as opposed to sand. Nelson
The total amount of heat, in British thermal units per hour, that must be
removed from the air by the cooling coils.
a. A closed-die squeezing operation, usually performed cold, in which all
surfaces of the work are confined or restrained, resulting in a
well-defined imprint of the die upon the work. ASM, 1
b. A restriking operation used to sharpen or change an existing radius or
profile. ASM, 1
c. In powder metallurgy, the final pressing of a sintered compact to
obtain a definite surface configuration. (Not to be confused with
repressing or sizing.) ASM, 1
Cement stone band. Stone suitable for coinstones, quoinstones, and
cornerstones, used in building. Arkell
a. Bituminous coal from which the volatile constituents have been driven
off by heat, so that the fixed carbon and the ash are fused together.
Commonly artificial, but natural coke is also known; e.g., where a dike
has intersected a bituminous coalbed and has converted the bordering coal
to natural coke. Sanford
b. A derogatory syn. for carbon; carbonado; black diamond.
See also:char
The fine screenings from crushed coke or from coke as taken from the
ovens, of a size varied in local practice but usually passing a 1/2-in
(12.7-mm) or 3/4-in (19.0-mm) screen opening. ASTM
a. N. of Eng. Carbonized or partially burnt coal found on the sides of
dikes. See also:natural coke
b. Coal altered by an igneous intrusion. Arkell
In the coke products industry, a laborer who removes coke from beehive
ovens by hand. DOT
Coal dust that has been coked by the heat of an explosion and has assumed
different forms under different conditions; usually found either near the
origin of the explosion or in a room or wide place where the velocity of
the explosion is low and there is insufficient oxygen for complete
combustion of the coal dust. The volatile matter of coal dust seems to
burn first and, if the coal is a coking coal, coke is formed of one kind
or another, depending on the position, temperature, size of the dust, and
velocity of the explosion. Also called coked dust. Rice, 2
Iron made in a furnace using coke as fuel. Webster 3rd
Coal altered by an igneous intrusion. Syn:carbonite
See also:natural coke
A mill used in the foundry for the grinding of coke for the production of
blacking. Osborne
A chamber of brick or other heat-resistant material in which coal is
destructively distilled. Coke ovens are of two principal types: (1)
beehive ovens, which were originally built round with a spherical top like
an old-fashioned beehive. They had an opening in the top and various small
openings for draft at the base. The ovens were developed into banks (rows)
of joining cubicles; coke in long columnar pieces is characteristic and is
still known as beehive coke. Tar, gas, and other byproducts are lost. (2)
Byproduct ovens, which were built in rectangular form with the front and
back removable, but so arranged that they may be luted to practical
gastightness and all byproducts gaseous at the high temperatures may be
pumped out. Hess
In the foundry industry, a laborer who unloads, stores, and conveys coke
within the foundry. DOT
A high tower or condenser filled with coke. Used in the manufacture of
hydrogen chloride gas to give a large surface for the union of a falling
spray of water with the rising hydrochloric acid gas. Fay
Coal that can be converted into useful coke that must be strong enough to
withstand handling. There is no direct relation between the elementary
composition of coal and coking quality, but generally coals with 80% to
90% carbon on a dry, ash-free basis are most satisfactory.
See also:caking coal; bituminous coal; Coalite. AGI
A mechanical stoker or device for firing a furnace that allows the coal to
coke before feeding it to the grate, thus burning the fuel with little or
no smoke. Fay
An open wirework shovel used for taking salt crystals from an evaporating
brine. Fay