The Jersey City news., 1903-10-03

paratiyely soft, spongy Or eoke-like mass
containing the mineral in metallic con-
dition. While still heated and in this
spongy condition the mineral passes on
into practically alright concentrating
chamber. (the supplementary reducing
furnace). where it meets heat several
hundred degrees higher in an atmosphere
of hydrogen, and, the metals being fused,
collect in globular masses much like bird
shot.
The clinker containing these little
nuggets is passer through crushing
rollers and the metllic particles are re-
moved from the chushed gangue or
spongy matter by .jigging" or BY any Of
the ordinary separating machines. The
metal may then melted and made into
ingots without any further treatment.
What this means is what DR.. Dawson
has provided new process by whoch the
reductions of minerals will be greatly
cheapened, and which will bring into the
market, large volumeof ore which is
too refractory or too lean ODE worked
economically. The process is especially
suited to the reduction of copper 1t
eliminates numebor Of expensive pro-
. cesses which preclude the marketing of
nearly rs percent of the copper ore thus
far developed. The Dawson process con-
yerts copper sulphides into bullion in one
J operation without preliminary roasting
without fuxes and without the smelter
and converter. Now it is stated on the
/ highest authority thatn OF more than %
per cent. of the copper ores in this coun-
try can be worked at ap roft by the pro-
cesses now In use The most refractory
sulphides and carbonates of copper yield
tractably to the hydrogen process at less
expense than the easy worked ores are
l
| ing and smelling. Ores now are reduced
to oxides by slow roasting and subse-
quent smelling into matte. This matte,
or regulus, may contain a great variety
impurities, which must be subsequently,
removed by expensive processes preclud-
| ing the working of ores at distance
from lines of transportation and other
ores which are too poor or too refractory
TO admit og being profitably converted in
to metal. With the hydrogen process
There is no Stag formed and no imprities
| left in th metal. Moreover it is un-
necssary to transport the ore from the
place where it is mined if there wood or
coal and water to be had in the mining
region.
From the miners point of view the
Dawson process commenrs itself because
it is necessary only to be where there is
wood and convert the wood into charcoal
to successfully reduce ore into bullion at
the mines. DR.. Dawson has demonstrate
ed that one ton of charcoal will make
enoughe hydrogen gas to treat 100 tons
| of ore. In recent laboratory test an a
small scale it was shown that a silicate
and carbonate copper ore from the Grand
| Canon in Arizona could be reduced to the
metallic state at cost of 2211a cents per
ton of ore for the gas consumed. The
cost of reduction of copper from the Ana
| conda mine in Montana last year was
| 1892 OF course. there are other expens-
es for fuel besides the cost of that used
| in making hydrogen for the Dawson pro-
cess, but the total falls far short of the
cost of the complicated processes now in
use and lets into the market great guam
tiles of ores which ordinary smelters can
lot convert.
DR.. Dawson was notified recently that
ae must discontinue the manufacture of
ydrogen gas in New York City. The Ere
apartment got after him and he began
pack uy on Thursday with the inten-
on of bringing his apparatus in this
ty. There are several Newarkers inter-
ted with him in the enterprise, and it