The Salt Lake herald. [volume] (Salt Lake City [Utah]) 1870-1909, 1888-06-17

crushing, roasting, assaying, etc. 1t is
very ayr esble to see this subject so
well handled, as it is very important
one and usually, in papers of this
character, receives the least attention.
v. APPLICATION OF THE PROCESS.
The process has been used on taiirngs
running from to IL ounces silver per
ton; on raw ores of IA to 10 ounces; and
on roasted ores Of from II to S8 ounces
silver per ton. The gold in thu
same ores varied from nothing to S6
and the lead from nothing to 20 per
cent. A line gangue eaus-'
no difficulty in the treatment mt re- az
acts beneicially. Two =, res al ,asas
treated ran over 20 pc : Ger y, $50 Sns
and one over 30 per CO - sp,en,nst 80, 80
antimonlal ores y 4eld readily 70 the
piUoesTT, ,i T xeia roasted without
sslt. Ialiings rom gaaalgatna,ion win
ullen pny " Neat, rs the teaching soiu
tioh VIII "a Re cut silver not capable of
e9tract'o' 4 by the former method. In
dis fic'h whore SaiS is ty7aY ard .y-tor
scar.e, H. is q yery desirable process.
VI. COMPARATIVE APPLICABILITY OF vARI
GUS ROASTING FURNACES TO THE PRE-
PARATIoN OF THE ORE FOR THE PROC sss.
In this section is treated the effects
of short roasting periods, effects of diff
ferent sizes of crushing ore, the roasting
in various furnaces, eff Cts of introduc
ing salt at different stages during the
roasting, and com parsons on costs and
losses in the diff rent furnaces. Much
statistical data is here introduced, max
ing it valuable compilation of.fscts re
garding roasting and furnaces.
OF THE RUSSELL PROCESS
WITH THE ORDINARY LEACHING Pro
CESS; WITH INAUGURATION; AND WITH
COMBINED AMALGAMATIoN AND CoNCEN-
TRATloN.
Under this heal is given first the
comparison OF this process with the
ordinary teaching process IN COM
parative mill runs or the large scale
in six different mills. These runs each
cover period ranging from two months
to two years, and IN each, except that OF
the Ontario. the number Of tons treated
per day varies from 25 10 20. Al the
Ontario in the two ton experimental
plant erected for the purpose of testing
the Russell Process and comparing it
with amalgamation and the ordinary
teaching process, both as to expenses
and results, and in which the compar
alive tests we're made for over two
years, the extraction by the Russell
Process exceeded that of the ordinary
reaching process TO the extent of
26 2 10 per cent. of the value of the ore.
or % Clio ounces per ton.
hot
the two processes occurred at Silver
City. New Mexico, on the raw taiIings
from the Bremen Mills, the extreme
finenes IS of which has already been
The test between the two
processes continued ON g scale of
twenty to thirty tons per day for thre e
the average difference in ex
traction for the whole run amountir G to
% per cent Of the value of the ore in
favor of the Russell Process. In tie
test at this and other mills it should b,
that when the difference
between the two processes was great. |
the tailings from the ordinary process
were treated by the Russell Process re-
fore being thrown away.
The third opportunity of comparing
the two processes occurred at Lake |
Valley .Nsw Mexico, the comparison Gov
eripg period Of eight months. the |
amount of ore treated varying from |
twenty to sixty tons per day. The result |
showed the average difference in eX |
trac' ion in favor of the Russell Process |
TO be 80 per cent. of the value of the ore |
The ore treated in this mill averaged for |
the last five months only II OF. per ton |
but continued to be profitably run until |
the supply of ore was exhausted. Prep |
aratlons are now being made to run the |
mill on new bodies of the same ore.
At Som brerete, Zacatecas, Mexico, q |
very large mill is now being constructed |
or the Russell Process by the Som
orerete Mining Company. under the |
of Clarence King. This |
mill will have rolls, the largest Stete-
eldt furnace ever constructed, and |
ea hing tanks of such a capacity as to |
,reat fifty tons each at charge. In
he test made in the old mill, and which
vas CO. tinued for nearly three months,
he diff renee between the results of the
ordinary process and those OF the Rus
ell Process were IN favor of The latter
o the extent of 22.6 per cent. of the value
If the ore or about IL ounces per ton.
The fifth competitive run between the
Russell process and the ordinary leach
ng process took place at the 40 stamp
MIL Of the Anglo-Mexican Mining
Company at Yedras, Slnaloa, Mexico,
md lasted fourteen months. This com.
oetltive run was divided into three
parts. the relative number of tons
reated by each process Varying. as the
,lant was being ALTERED for the Russell
process, the time of altering being very
ong on account of the location of the
nil in the most mace ssible portion of
VI xico. During the first two months
he Russell proc IS was run on a g. ale of
,nly two tons per day and the ordinary
PROCESS on forty tons per day. The
extraction by the Russell Process ex-
:reded that by the ordinary process by
8 lilo per cent. of the value of the ore or
l 2-10 ounces per ton. During the
econd part of the fourteen months the
Russell Process was run on about IF
cen tons per day and the old process
N about twenty five. The result of
his run was in favor of the Russell Pro
less by II l 10 DER cent. of the value of
he ore. During the third part of the
ourteen months the Russell Process
vas run on a scale of about thirty tons
,er day and the ordinary process on
en- tons. The difference was in favor
# the former by l6 per cent of the value
# the ore, or about $l10 600 per year.
The sixth competitive Iuu between
he two pro- esses took plsc- at the sixty
lamp mill of the Ousihuiriachic Mining
y