The Bozeman weekly chronicle. (Bozeman, Mont.) 1883-1889, 1888-10-03
gold. That all the facilities for working


which these minerals will Weld their
values at a profit. Tlli. is all the impor-
tant question. For number of years
past some method to profitably treat
these "base'' ores, or more properly,
auriferous sulphides have attracted the
attention of metallurglsts and practical
mill men. ] should also mention in this
connection class of ores which carry
flour" float and rusty gold, also
gold in association with tellurium. A
great many different methods were de-
vised. and as the demand was yearly in
creasing, by reason of the rapid exhaus
ton of the "free" or surface ores, human
ingenuity was taxed to the utmost, to
meet this great and ever increasing want.
Whele camps were deserted in copse
quence of the inability of the known
systems of reduction, to extract the
values contained in the ores at profit.
Great loss was entailed, running into the
millions, in consequence Of these failures.
Owing to the comparative exhaustion
Of the placers and the stoppage of hy-
draulic mining in California, as also the
great decrease IN the production of gold
quartz lodges, our yearly mint reports
show great falling off in the yield of
this noble metal. Mining men of ex-
perience and travel, already foresaw that
in measure, the gold of the future pro-
duction must come from the auriferous
sulphides. The first practical result to
solve this problem of treatment was
chlorination and teaching. This metal
lurgical-chemical process, was intricate
| and expensive, requiring, to operate sue
cessfully, the services of good metallur-
gist, well up in the theory and practice of
his profession. Such persons are scarce,
the demand beng largely in excess Of
the present supply Various other pro-
cesses were invented, all possessing some
merit, but failing in a general way to
meet the requirements. Thisgr wait
demanded a system that ordinary mill
men and miners could learn to operate
successfully and that would recover at
comparative small cost high per cent Of
the sample assay of the ores above re-
ferred to.
| As before remarked, nature seems to
Rave pointed out the first step in the
right direction, to successful treat these
"dry" auriferous sulphide ores (by dry"
is meant ores free from lead and znc)
namely oxidization. The gold obtained
free quartz, and oxidized ores. The yield
as a rule, was in proportion to the per
fection of the oxidizadon, and the alb
sence of -four, float and rusty gold, that
would not amal!amate in the battery, OIL
stick to the plates. We conclude for the
reasons given above. that perfect anc
, cheap oxidization will go long wayl
. | towards realizing the desired result. Th.
| next step would seem to be to collect ir
, ONE expeditions and economical man
. | ner the gold set free by oxidization. Will
, proper auxillaries, in the way of cheal
: crushing, drying and pulverizing F.; assum
!, ing we can oxidize and recover the gold
/ we can claim to have placed in practica
| operation a method that will fully NEE
:
This brings me again to more length!
and carefnl consideration OF the walker
D Carter mill as regards its applicability t.
the class and grade OF ores Just discussed
B. i =.
This plant has been IN almost continou
operation at this place, since about IN
10th OF last July, treating on an averag
ming time. desire to state that ever
'' facility has been afforded me to fully IN
vestigate its merits, and that have trle
u to avail myself OF the privilege 10 IN
~ fullest extent. Not one test but a grea
!, many have been made. always shown
u and proving the claims OF the parties
: charge to be verified. have in formt
l. letters attempted to describe in bril-
= way the mechanical appliances in use,
- carry out what is called the Walker-Ca
10 ter process. l will repeat again that tt
10 machinery is all new to me, but viii
" being new is certainly most etficaclo
81 and fully meets the demands made up'
al II. The commencement of the operate
10 treating ores at this mill is crusht
III called the Gates NO. l Combined FL
and Coarse crusher, and Is probably q
o. only one OF the kind IN use IN this ter
OF tory. l nave used the Blake " Dod