A flotation cell of the subaeration type. Design modifications include
receded-disk, conical-disk, and multibladed impellers, low-pressure air
attachments, and special froth withdrawal arrangements.
Pulsion-suction diaphragm jig for fine material, in which makeup
(hydraulic) water is admitted through a rotary valve adjustable as to the
portion of jigging cycle over which controlled addition is made. Used in
coal preparation for the removal of pyritic sulfur from thickener
underflow material prior to its treatment by froth flotation.
See also:jig
See:bentonite
The process of extracting the oxygen content of a dissolved oxide, or of
removing dissolved oxygen, with the aid of a reducing agent.
Henderson
To remove oxygen by chemical reaction, generally with carbon.
Mersereau, 2
Copper from which cuprous oxide has been removed by adding a deoxidizer,
such as phosphorus, to the molten bath. ASM, 1
A substance that can be added to molten metal to remove either free or
combined oxygen. ASM, 1
a. The removal of oxygen from molten metals by use of suitable
deoxidizers. ASM, 1
b. Sometimes refers to the removal of undesirable elements other than
oxygen by the introduction of elements or compounds that readily react
with them. ASM, 1
c. In metal finishing, the removal of oxide films from metal surfaces by
chemical or electrochemical reaction. ASM, 1
A charge of explosives in a borehole that depends for its effect upon the
result of one or more previously fired shots.
Elimination of phosphorus from steel, in basic steelmaking processes.
Accomplished by forming a slag rich in lime. See also:acid process;
basic process; Bessemer process; open-hearth process. CTD
Removal of part or all of residual phosphorus from steel in basic
smelting. Pryor, 3
See:spent fuel
The act of emptying, reducing, or exhausting, as the depletion of natural
resources. In mining, specif. said of ore reserves.
See also:economic depletion
A proportion of income derived from mining or oil production that is
considered to be a return of capital not subject to income tax.
AGI
An area or site of maximum deposition; the thickest part of any specified
stratigraphic unit in a depositional basin. AGI
a. Anything laid down. Formerly applied only to matter left by the agency
of water, but now includes mineral matter in any form that is precipitated
by chemical or other agent, as the ores in veins.
b. Mineral deposit or ore deposit is used to designate a natural
occurrence of a useful mineral, or an ore, in sufficient extent and degree
of concentration to invite exploitation.
c. Earth material of any type, either consolidated or unconsolidated, that
has accumulated by some natural process or agent. The term originally
applied to material left by water, but it has been broadened to include
matter accumulated by wind, ice, volcanoes, and other agents.
CF:sediment
d. An informal term for an accumulation of ore or other valuable earth
material of any origin. AGI
e. Verb. To lay down or let drop by a natural process; to become
precipitated. AGI
a. The process of natural accumulation of rock material thrown down or
collected in strata by water, wind, or volcanic action; also, the material
thus deposited. Opposite of denudation. Standard, 2
b. The precipitation of mineral matter from solution, as the deposition of
agate, vein quartz, etc. Fay
A class representing all the recognized mineral deposits that are defined
by physical and genetic factors that can be consistently differentiated
from those of other classes or deposit types. Barton
In the froth flotation process, a reagent that reacts with a particle
surface to render it less prone to stay in the froth, thus causing it to
wet down as a tailing product. Depressants act by complexing elements at
surface lattices of minerals that might carry a charge attractive to
conditioning agents; by destroying collector coating; by surface
modification of particles. See also:bathotonic reagent;
surface activity. Pryor, 3
The lowest level of ground water during drainage or pumping.
BS, 10
a. Any relatively sunken part of the Earth's surface; esp. a low-lying
area surrounded by higher ground and having no natural outlet for surface
drainage, as an interior basin or a karstic sinkhole. AGI
b. A structurally low area in the crust, produced by negative movements
that sink or downthrust the rocks. CF:basin; uplift. AGI