An auger-type screw to transfer material from one piece of equipment to
another. ACSG, 2
See:jackscrew
See:screw-type mixing conveyor
A wide helical blade fixed on a shaft and screwed into the ground by means
of a winch or capstan. Hammond
See:hoisting plug
A long cylindrical nut, threaded internally with a right-hand thread at
one end and a left-hand thread at the other, used to connect and tighten
together the ends of two rods forming a brace or tie. Hammond
A type of screw conveyor consisting of one or more conveyor screws, ribbon
flight or cut flight, conveyor screws with or without auxiliary paddles.
See also:blending conveyor; screw conveyor.
An instrument used by surveyors for marking posts, trees, etc. Fay
a. Derb. Ironstone in irregular-shaped nodules.
b. Derb. A small subordinate vein. Also spelled skrin.
A helical projection on a drill rod or stem to remove cuttings from a
hole. BS, 12
S. Wales. Overlying strata loosened or broken by workings underneath.
Probably a variation of scrunge, to squeeze.
a. Corn. A thin, sometimes calcareous or siliceous rock attached to the
wall of a lode.
b. Corn. Loose ore at the point where a lode is disturbed by a cross vein.
a. Device in which coarse and sticky ore, clay, etc., is washed free of
adherent material, or mildly disintegrated. The main forms are the
wash-screen, wash trommel, log washer, and hydraulic jet or monitor.
Scrubbers or scrubbing towers are also used to separate soluble gases with
extracting liquids, or to remove dust from air by washing.
Pryor, 3
b. Device for separating environmentally noxious chemical substances from
waste gas streams.
Eng. A provincial term for a variety of calciferous sandstone.
a. A mixture of tin oxide and iron-tin alloy formed as dross on a
tin-coating bath. ASM, 1
b. See:scum
See:self-contained self-rescuer
Tumbling of sands with sufficient violence to remove loosely adherent
surface coatings without otherwise breaking down the particles to any
great extent. Pryor, 3
Incrustations of slag, dross, and metal on the contacting surfaces of
vessels that treat or hold molten metals. Pryor, 3
To break slate into slabs suitable for splitting. See also:hard way
Webster 3rd; AIME, 1
Fracturing the slate along the grain, e.g., across the cleavage.
Zern
a. Impure or extraneous matter that rises or collects at the surface of
liquids, as vegetation on stagnant water, or dross on a bath of molten
metal. Sometimes incorrectly used for the word froth in flotation.
Fay
b. A surface deposit sometimes formed on clay building bricks. The deposit
may be of soluble salts present in the clay and carried to the surface of
the bricks by water as it escapes during drying; it is then known as dryer
scum. The deposit may also be formed during kiln firing, either from
soluble salts in the clay or by reaction between the sulfur gases in the
kiln atmosphere and minerals in the clay bricks; it is then known as kiln
scum. Cf.: efflorescence. Dodd
c. Undissolved batch constituents floating as a layer above the molten
glass in a pot or tank furnace. Dodd
d. Areas of poor gloss on a vitreous enamel; the fault may be due to
action of furnace gases, to a nonuniform firing temperature, or to a film
clay arising from faulty enamel suspension. Dodd
e. The "clouds" appearing around decalcomania formed by varnish residue.
ACSG, 2
f. A surface defect appearing as dull patches on otherwise bright surfaces
of glazes, glass, or porcelain enamel. ACSG, 2