Eureka daily sentinel. [volume] (Eureka, Nev.) 1871-1887, 1883-06-02
STAG.
A Future for This Now Unprized
Refuse.

II II Made Into Bricks and 81: bs
and Stlicate Cotton for Lining
B~oiiers-The Various Ornamental
Uses TO which Il May be put
Possible Fortunes In Present
Waste.
London Mining Journal.
Considerable progress has Of late been
made in the utilization Of ordinary furnace
Stag, and probably other uaes will be found
for it. In the North Of England and about
Leeds it is being employed as bricks and
slabs for building purposes, and as silicate
cotton. for covering steam boilers, pipes,
cylinders and fuel economizers. Mr..
Binyon Of Manchester produces it in the
latter state. and is understood to have q
large sale for it.
Stag can be made OF a snowy whiteness
and Of the most delicate fiber, is perfectly
incombustible, with great non-conducting
and indestructible qualities. The fine
woolly fiber is produced by steam acting
on the stream OF the Stag in its molten
state in q special chamber to which the
fieecy particles adhere. The Stag wool is
used as o protection against fire, az well AZ
for the fltering Of chemicals, for which il
is we'll adapted.
For making Stag bricks there are ma
chimes now in operation that will turn out
from 10000 to $4,000 q day. The bricks
are strong, perfectly uniform in size and
thickness, and require less mortar. The
molten Stag is run into molds direct from
furnaces ranged round 9 rotary table, or
| by grinding the material and mixing ii
| with aanI and thar saraeotnO Roth hrIcka
or slabs are found we'll adapted for railway
platforms, buildings OF all kinds, baths,
drainage pipes and roads, being more DUR
able than ordinary stone.
The ~silicate cotton ia used for many pur-
poses besides those mentioned, especially
as a non-conductor. There appears no
| reason why Stag should not be utilized for
ornamental purposes, seeing that it is pro-
| duced in nearly all colors, and the cost
would be trifing. Slags from hemstite
ore, containing q certain proportion OF
manganese, such as are worked in Cum
berland, give the tint OF the amethyst in
| the vitreous parts, but by certain means
that color is made to disappear and is re-
placed by a pearly white pumice one. I'm
| der different conditions the same furnaces
give q Stag Of 3 dark green color. There
are nearly all shades Of blue and green,
and there are light greens as well. An
opalescent Stag is usually found where
there is a considerable quantity OF alumina
in the ore, whilst the ores of the coal meas
ures give an alienation Of shades, with
dark green or blue stripes, sometimes run
ming into one another, whilst an excess OF
lime gives a Stag Of q dull stony character,
which is only suited for making lime
or cement, q good deal is used for both
purposes in the north OF England. With
protoxide of manganese, found in consid-
cradle quantities in spathic ores, in some
instances to the extent OF from s 10 10
per cent. Q violet color is produced. and
yellow or dark green by proto-sulphide of
manganese. A bright blue Ia met with in
the Swedish slags, and looks we'll. and Is
attributed 10 various matters in the ores,
probably sulphide Of manganese. The
colors OF the alag. however, vary with
their composition and the conditions I'm.
der which the furnaces are worked, but
the slsgs produced from furnaces With
light burdens and gray iron 10 made are
usually white or gray but where the bur-
den Is heavy, and the temperature not so
high, they are usually black, their vitrsous
character and Auidity increasing in pro-
| portion to the amount Of silica In the ore.
In Derbyshire the stone found in some
mines Ia worked up into various handsome
and ornamental shapes. and sells readily.
90 that with the millions OF tons OF Stag
industrial paths might be formed that
would be marketable from their low price
There 10 no difficulty found in getting
| the slag into . 6uid state and casting II In
moids. At present. however, the utilisa.
| tion OF the alag or blast furnace refnse. "a
II IL generally termed, IL principally con.
fncd TO the making OF bricks. slabs, Stag
sand, single for concrete, paving blocks,
mortar, glass bottles. and the Ane Stag
wool, or sllioate cotton, for which there Ia
now . large demand.