The Salt Lake herald. [volume] (Salt Lake City [Utah]) 1870-1909, 1897-04-13

IN answer 10 the request maze %,
The Herald, the management of tn,
Boston and Mercur Gold Mining com
pany has furnished the following de
scription of the plant soon to be erected
on the La Cigale group of claims OF
the west dip, in Camp Floyd district
which are owned by the company
viz:
The contract has been awarded Il
Jones & Jacobs of Salt Lake City fol
the erection of the mill building anC
setting of all machinery for the Bos-
ton and Mercur Gold Mining company;
also for an assay Office and house fol
the mana cement. The machinery con-
tracts have been awarded to the Raw.
son & Morrison Manufacturing COM
pany of Cambridge. Mass, the Corliss
Engine company of Providence, r. I.
! Frazer & Chalmers and Gates Iron
/ works, both of Chicago, III.
1.-The mill will have capacity of 200
tons a day, with q power of crushing
capacity of 400 tons a day 1t is in
tended by the management, after the
2O0-ton mill has been running for a
Few months and more ground has been
opened up in the mine to increase the
capacity of the mill to 400 or 500 tons
this year.
This mill will be a new departure
for a cyanide process mill and will be
the only one of the kind ever built of
TINS special design. 1t was designed
by Henry S. MacKay, architect, one
OF the directors of the company and
one of the principal holders of the
STOCK. and the mill will be built under
his personal direction. The principal
difference in this mill from others is
the automatic handling of the ore by
machinery, to save labor.
The mill is located over the mouth
or the Boston shaft, or incline, which
is sunk on the vein from the outcrop.
In other words, the shaft comes I'D in
the mill. The ore is brought I'D from
the mine in a two-ton self-dumping
skip, and is carried to a distance of
ABOUT 30 feet above the mouth of the
shaft. The ore is then passed from
the self-dumping skip onto grizzleys:
part OF the ore then passing through a
No. 4 Gates rock breaker, where it is
broken down to pass through a one
and e-quarter-inch ring, then
through revolving screen and
through a set CT 36-inch Cornish rolls
II is then elevated and passes
through a second revolving screen. and
through a second set of 36-inch Cornish
rolls, where the ore is broken down to
mesh From the last
set of Cornish rolls belt elevator car
RES the ore TO a large ore bin at the
top of the main farmhouse, which is
some 40 feet high. This ore bin ex-
tends the full length of the tankhouse.
forming two compartments length
wise of the building, the bottom of each
compartment being V-shaped
The ore as deposited from the OLE
Vator at the top of the ore bin. is con-
veyed along by travelling belt convey
ers, and is distributed the length of the
ore bins, which extend the full length
OF the tank house. which is 106 feet
long- Directly under these ore bins are
the teaching tanks. which are made
OF steel is feet long. feet wide and
rect deep, and are arranged in two
rows of II sets, or "a tanks in all
These tanks differ from other teaching
tanks used in the cyanide process. as
they are made with solid bottoms.
water tight, except the opening TO draw
DIFF the solution. They have the ordi- !
nary raise bottom, and filter inside, but |
hey rest on revolving pivot, which |
consists of a finch steel shaft. pass
ng lengthwise through the tanks and
Keyed to them. On the end of this
shaft is gear and worm wheel and
rank. BY means of this worm gear
Wheel one man can turn the tank up
'ide down on its pivot, and all the ore
S thus emptied out into failing bins.
which run directly under all of the
anks, the full length OF the tank
louse, similar TO those for the ore at
he top of the building. The tailings
hus deposited in the lower part of the
'uiiding automatically run down an
ther story, through steel spouts, into
raveling conveyors which deposit
hem out into the valley. beyond the
MILL
All that need be done after a tank
5 thus emptied is to open a gate in a
pout which comes directly over each
ank, and is in connection with the ore
ms above, and the tank is immediate
7 filled without any handling of ore
y cars, or other means.
The precipitating tanks are on the
round floor, and are the ordinary pre-
.pitating tanks. made of steel
The power furnished for the mill is
! an 125-horse power Corliss engine ;
18th three horizontal, tubular boilers
inches in diameter and Is feet long.
he hoist is a 50-horse power double
ear, ible-link-motion, single I
rum hoist, capable of hosting three ]
ms at the rate Of 400 feet a minute.
THE very best machinery that could {
2 bought is to be put into this mill. !,
nd it is the policy of the management /
have the most modern mill that '
,uld be produced, to handle the prod
It at less cost than any mill yet |
ected.
THE company has been careful to :
;certain this before building this ex- q