Omaha daily bee., 1901-01-21


RADIO Springs Colo has put on an increased
force OF men on the excavation for the site
OF the new steam hoisting plant o. II.
Amsdcu, the company's expert and super
intendent. has opened an office in Lead
Fourteen cyanide riauN.
Fourteen cyanide plants are now In opera
tlon in the Black Hills twelve in Lawrence
county and two in Pennington. For twenty
five years the Black Hills people have been
experimenting TO find a process that would
successfully treat low grade ores. Smelling,
chlorination and other processes have been
used on the richer ores with success for ten
or more years, but the great quantities Of
~ and $40 ore could not he prontshly treated
with any OF these methods. The average
value Of the ore in the Black Hills Is low,
perhaps about sl2 per ton in gold. The con
dition of mining AFFAIRS in the Hills has
been enhanced nifty fold by the advent OF
the cyanide process, which Is performing
wonders in the reduction OF the grade
ores. Colorado men say that BLACK Hills
ores contain less deleterous materials, that
might hinder the action OF the acid upon
the gold than the ore OF Colorado and other
western states. II Is now possible to treat
so per cent OF the refractory ores in the
Hills. and with certain notifications, ~ Is
believed that the remaining 20 per cent will
become amenable. The ore in the Black
Hills is rarely free. milling TO more than
nifty to 100 feet below the surface. The
Homestake company has been compelled to
put In cyanide plant In which to treat
taiincs. The same s true OF the Holy Ter
ror mine In Pennington county. The method
Of ore extraction that is destined to be the
af,1
the cyanide process either wet or dry. with
rolls or stamps
1--WE New Mining Companies.
II is known in Deadwood that capitalists
OF Colorado Springs, Colo. stand ready to
organize two new mining companies just as
soon as II is conclusively determined that
the Spcarnsh Mining company OF that city
Is q success. The company has built 950-
ton cyanide plant at Ragged Top which Is
the largest plant of that kind In which ore
Is crushed in the Hills. The Homcstake
company will have larger takange capac-
ity. but no crushing OF ore will be done in
the plant. for the reason that 1t Is intended
to treat the tailiugs OF the stampmils only
The Cyaniding Of ore is especially Attractive
to Colorado mining men, and there is rea-
son to expect that o number OF new com
panies will be organized this winter TO op-
crate In the Nat formations In different min
ing camps In which the grade OF ore runs
from SO to $40 per ton.
output of Gold 81 100000.
The output 81 gold from the Black Hills
| to date has been about 800 900 600. OF this
amount tho Homestake company has pro
duced nearly one-half, the remainder hav-
! ing come from the placer diggings, smelter.
chlorination works and, in the last three
years from the cyanide plants. 1t Ia now
expected that the output Of the new cyanide
plants In the next twelve months will in
crease the output of gold one-third and In
hve years time II is predicted that two
| thirds of the bullion will come from ore
| cyanided.
At the Deadbroke mine in the Blacktal
district ore is being mined for 81 cents per
| ton. II is handled economically and the
manager OF the cyanide plant which treats
| the ore states that the gold is extracted for
| 76 cents per ton, making total OF Sill for
mining and milling the ore. This particular
ore runs about $s per ton in gold and the
! ledge is over 800 feet wide and extends sew
| eral miles.
Iomcstnkc Compnny's New Plant.
The Homestake company viii have ns
1,2OO-ton cyanide plant completed soon. 1t
is expected that practically all OF the values
that remain in the tallngs from the mills
| about 81 so per ton, will be saved, which
! will mean saving of about 100000 per
| month to the company.
The twenty-ton cyanide plant in the North
Lead district. owned by Lead men, has been
enlarged to fifty tons capacity. The Port
land Mining company OF Clinton Ia. has
started up It's new nifty plant at Central
City and the first runs have been very sat
| isfactory.
Sioux Falls capitalists have purchased the
| NJ. l,l aT ,,tntn al nj ~
about four miles northwest OF Keystone on
the Kelstone ore belt. There are six claims
in the group and two-campartment shaft.
which is down 100 feet. twenty-stamp
mill goes in the sale 1t Is asserted that
the Holy Terror ledge OF ore has been found
passing through the group. The property
will be developed thoroughly.