The Salt Lake herald. [volume] (Salt Lake City [Utah]) 1870-1909, 1907-12-31
EXPERTS WATCH
NEW PROCESS
Concentrating Plant at GoICOn-
da May Mean Much for
Nevada Mining.
VISITED BY P. C. THOMPSON
COLLECTS VALUES IN ORES OF
HEAVY GANGUE.

|; is declared that wonders are being
performed by a new concentrating
process that has been installed at the
Glasgow & Western companys mill at
Goleonda. New. IT is known as the
McQueston process, and is declared to
be an absolute reversal Of the usual
Vet methods of separating the metals
from the gangue in the ore. While the
process has been receiving a thorough
testing on a number of kinds Of ore for
some time past, there has been nothing
made public concerning it, locally, at
east. Yesterday morning p. c. Thomp-
son, who has been on d trip to Gold
Circle. New, spent Sunday at the works
Of the Glasgow & Western company at
GOlcCnda, and it is 10 him that The
Herald is indebted for the statement
OF what is going on.
Test Run is Made
When l was at the plant" said Mr..
= thompson, "a test run was being made
on copper orc from Yerineton, and
was told that it was proving most sue
cessful. Tests have been made on most
of the ores from Ely and, while I can
not speak with authority, 1 was given
he impression that there is every like
hood that the process win be installed
in the mammoth plant of the Nevada
tCnsOlidated-Cumb compa-
lieS al McGilL 1t is claimed for the
process. first, that it costs less than
any other to install; second, that il
costs little for power and men to Oper-
ate, and, third, that it affects a saving
ia certain classes of ore that no other
known process can approach With
this process the lighter the ore and the
heavier the gangue the better. but it
does remarkably fine work on sui
phides. as well / am not mill man or
a metallUTgist and l am therefore I'M
able to properly explain the process to
YOU.
An Interesting Process.
However, the ore is crushed and
made into a pulp by the usual method,
as | understand it. The finely crushed
Wet ore is-then drained till il resem-
bles a damp cement. 1t is then run
into a kneading box and thoroughly
mixed while certain percentage of oil
and sulphuric acid, nicely regulated. is
being added. After this mixing the
pulp goes on 40 another box arrange
ment in the bottom of which is a series
of holes. BY the addition of a little
water and the action of revolving
blade, just so much of the pulp is al
lowed To escape through these where it
Is conveyed down to what you might
term the cOncentratOrs. These consist.
not of tables, but tubes in which worm
screws are made To revolve very slow
~. Into these tubes, with the pulp.
water is admitted and the material is
slowly worked through. 1t seems the
acid attacks the copper OF other metal
nj the ore tthe process is not designed
Tor gold ores). while the oil acts as a
carrier. When il elnerges from the
lower end Of the tube it is found that
a portion OF the metallic contents of
the rock is floating as a scum on the
top, while the unaffected gangue. or
quartz, is falling away with the under
current. Whatever metal can be is
saved here. and the rest of the ma
terial goes down to the second set of
tubes. and the process is repeated. In
ALL the material goes through five sets
of tubes and the material that issues
from the bottom set is practically free
OF metal. You dip your hand down |
into the stream and all you collect is |
a handful Of sand that is as clean as
any ocean beach you ever saw"
Experts Are Interested.
Mr.. Thompson says that experts from /
All over the world have been, and some /