The Salt Lake herald. [volume] (Salt Lake City [Utah]) 1870-1909, 1896-06-08

THE SUNSl
the solution from the stump to the solu-
ton tanks, and also the drying box,
heated by steam. in which the cyanideS
or product of the mill is prepared for
market.
After the inspection of the mill, din
ner was announced, and it was then
that some of the hardest labor of the
day was zealously INDUCED in, for
when seated at the Widespread table
in Gibson's boarding house, which was
presided over in faultless style by Mr..
Jacobs, the scribe did full justice to
the good things set before him.
An hours rest was then INDUCED in,
after which. when overalis, an old coat
and hat had been donned, the party,
for r. H. Officer, Mr.. Hariinge and
Mr.. Orr had appeared on the scene of
action, began an examination of the
great Sunshine mine. for great il is,
in every sense Of the word
The foundations of the Sunshine mill
are laid on body of mineral, but-the
entrance to the mine was made at the
old tunnel in the gulch, from which
point the vein was first opened and
developed 1t was in this tunnel, at
distance of a few feet. that ore was
first encountered and it was here,
that Mr.. Jacobs cut out a large cham
Der, so that he could ascertain the dip
of the hanging wall and the strike of
ore bodies. At this point the mineral
was found to be pay ore. and from
this on there was nothing to be seen
but enormous bodies of milling gold
ore. for the ore was above and below,
and on either side, and throughout all
the different levels, inclines, upraises
and slopes there was nothing but ore
The mine, with its mile of under
ground workings, was one mass Of ore,
from the surface to the six hundred
foot level all of it being pay mineral,
while some of it was every high grade
in character.
THE SUNSHINE MILL.
The Sunshine mill is about fifty feet
wide by $50 feet in length, and, is from
one to two stories in height. The
building is arranged SO as to conform
to the topography of the site, and also
so that in the treatment of the ore the
work is carried on and facilitated by
gravity.
The mill is equipped with 95-horse
power hoist and a 100-horse power
Corliss engine. which is supplied with
a boiler capacity capable of running
all the machinery required in the
mill. There is also a No. 5 Gates
crusher, a set of 16x36 inch Cornish
rolls and two revolving screens.
The ore is hoisted from the mine in
a large two and half ton skip car,
Quilt by A. NJ. Grant, OF the Eagle
foundry. of this city.) and is dumped
automatically into the coarse ore bin,
having capacity Of $50 tons. This
bin is built at the top of the mill, and
the ore is fed by gravity over a griz-
zly into the crusher. Thence, also by
gravity, the crushed ore passes
| through the revolving screens, the I'M
! finished or coarser ore being carried
to the rolls. and from there to the
| elevator and raised to another revolv-
! ing screen, where it is thoroughly
mixed, so that if there is any taley or
| clayey ore it is equally distributed
] and mixed with the coarse. From the
screens the mineral falls into the
finished ore bin, which has capacity
of 300 tons.
The ore is then drawn off from the
bottom of the ore bin into two-tor
cars. and after weighing. it is run di-
rectly over the teaching tanks OF
which there are six, with a capacity
of thirty tons each. These tanks are
circular in shape. They are built OF
No. 10 iron, with wooden bottoms
with 14x16 inch openings in the bot.
toms through which the taifings are
dumped.
The solution tanks are also cir.
cular in shape, with wooden bottoms
! These tanks are filled with water
which is charged with cyanide of po-
tassium until it arrives at a strength
4 of one-fourth of one per cent. Ir
teaching the ore great care is taker
to keep it from packing, and the
| cyanide solution is introduced from
the bottom of the tanks and forced uT
through the ore very slowly. until il
covers the ore, when it is allowed tc
stand from six to twelve hours. 1t is
then drawn off, also very slowly, from
the bottom of the tank, and carried
in pipes to the zinc room, and thu
gold. which has been dissolved by the
solution, is then precipitated upor
zinc shavings, which are arranged il
a series of compartment boxes. The
solution flowing on and into the sumI
tank where it is restandardized by the
addition of cyanide and pumped bach
| into the solution tanks ready to be
4 used again.
From six to twenty changes of so
luton are given to each thirty-tor
tank of ore before the teaching pro
cess is completed, and this takes from
forty-eight to ninety-six hours
The gold. as it is precipitated upor
the zinc shavings, (Which are turned
out of sheet zinc with an ordinary ma,
chine lathe in long strings to a thou