Gold Hill daily news. [volume] (Gold Hill, N.T. [Nev.]) 1863-1882, 1866-03-13
STOCK @
fREronrIn sr T. o'BRlEs. STOCK BROKER, GOLD HILL.
SAN FRANCISCO, March 49, ?. ~.
SALES,
New Roasting Furnace.

Yesterday afternoon we saw in opera
ton a new furnace for roasting pulverized
ore, which was invented by Joseph Cor
bett, who filed his caveat last December.
The principle Of the invention is ingeni-
ously illustrated by crude yet entirely
practicable means. For instance, the boiler
is a common quicksilver flask. Economy
and efficient work seem to be the salient
points of the invention. We will attempt
u concise description Of the %furnance. The
furnace is in the form Of three quarters of
q circle, through which extends a hollow
shaft, attached to which are W arms
holding spiral shaped scrapers or shovels;
the arms and shovels are also hollow.
The shaft has a two.ffth revolution, and
the two shovels o%scillat0 regularly, and
catch up the pulp and keep it necessarily
in motion. The peculiar shape of the
shovels, which resemble the blade of a pro-
pcller, moves the pulp longitudinally, as
well as from side TO side, exposing the
whole mass continually and uniformly to
the action of the flame. The hollow
shaft. arms, and shovels are kept filled
with water, which is supplied through q
pipe leading from q reservoir to the end
Of the shaft, which is furnished with an
air.tight coupling, and the water runs into
the shaft through q SLOT" and passes
thence into the arms and shovels. A SIM
liar continuance at the opposite end Of
the shaft carries off the constantly gene.
rating steam through Il pipe into the steam
chest, adding to the motive power. The
object Of the inventor in constructing the
shaft, arms, and shovels hollow, and keep
ing them filed with water, is to prevent
or retard the destruction Of the iron ex-
posed TO the intense heat Of the gases.
The boiler is so placed as to form the
head or arch Of the furnace. The FIRE
crate is built at one end Of the furnace,
and the fame passes out as in an ordinary
reverberatory furnace. After the furnace
has been charged it is kept tightly closed
until the ore has become thoroughly
desulphurized, and when tho roasting is
completed the pulp is discharged through
a trap door in the bottom or hearth Of the
furnace into ar iron hopper, into which a
jet of cold water is allowed to flow to
moisten the pulp, which is then dis
charged from the hopper into q car and
taken to the amalgamating room. 1t is
claimed BY the inventor that this furnace
will roast the ore more thoroughly and IN
less time than the ordinary mode Of stir
ring the pulp by hand, and that its use in
wolves q vast economy in labor and fuel.
According to Mr.. Corbett, q furnace CON-
structed. upon his model. large enough to
receive and roast q charge Of four tons Of
pulverize1 ore, will consume only three
cords of wood daily, and will require the
service of only one man on a shift; and
the same fuel will furnish the steam for IN
engine Of sufficient power to crush the ore
and carry on the process Of amalgamation.
The furnace will be in operation on Mon
day in the Uznay's assay Office, where the
curious in such matters may be grati6ed.
The inventor. Mr.. Corbett, is a locksmith-
who is proverbial for his ingenuity-for-
merly Of Salt Lake City, where he resided
a number Of years. He is very sauguine
of the success Of his furnace.-Ree,s Rirsr
RcreiRe.