New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1893-01-09
TO REDUCE REFRACTORY GOLD ORES.

TO REDUCE REFRACTORY GOLD ORES.
From The san Francisco Chronicle.
on entering stockton by boat the attention Of the
visitor attracted by some low sheds close 10
tho waters edgc where the Mormon ana stockton
channels join The queer looking structures OF wood
ana canvas have been there for nearly three years.
and all That dine an air Of mystery has hung about
them.
In the last wc.l, greater has the wonder grown.
FOR out Of th"s" shed, has come an eccentric OLD man
Who announces To tie world that he has perfected
within them an lnveu,lon Of more importance 20
California than Bcssemers process for nlng steel
lion Of electricity to inCsndescent lighting The few
contryancrs 80 carefully guarded within the sheds
have iulilcd much OF The venerable inventors en-
Mining men viii understand tic nature Of the dis
coVry and realize IT. Import nee 10 ~" state when
they that the Inventor claims 10 hay" perfected
perfectly feasible and practi.a method Of ~oEllns
sierra Nevada. l. tbs BE- tfuc. and there seems to
De- every reason 20 believe H. the discovery adds
In this state As mining men ana prosp"' tors All
know ihcic are hundreds upon hurdreds OF mines
and claims unworked day although rich IN precious
metals because there has been no known process by
which the gold could be economically taken from the
quartz In many Of these mines assays have Sho" y
dat the ores run even rs hi2h rs cloo 'oh' anu
yet tic properties have been abandoned. There were
ways 10 Get the gold, but they were laboratory
methods. and dear experience proved that III using
them AZ uc mines 1t cost NOR" 10 i'e We h'rul
bullion II /, claimed for this process Nv hose who
have seen 10 applied that II Will WORK at profit tn"
most refractory ores, even though tN.y run nol NOR
totally unlikc ANYTHING heretofore made for working
ores that 40 would uke Il 10 be wat IT +. The
stamp MIN IS done away with altogether. he orc.
broken into pieces largo wall us. rms into a
crushing machine in which rough siecl pia,es rub
e e vS S' sand MINER Understand that desc re-
belos contain ordinarily no free gold whatever
ono can look OF this sand u comes ont OF Muhtts
crrsicr without seeing the glitter Of gold ANYTHING
10 indicate that there IS blt OF the yello" metal IN
r.. The gold Is held In comhlnauon7' ana such com
lnatons hst only the most costly chemical processes
have hcrci fore been able 20 separate them. ms
fHe most important par, Of Motifs Invention.
Externally ms "oSidirinS" machine looks not IN
Ike q boiler With some cog-wheels AT one end, n
Pipe 40 ilc other aud hrehole beneath pressure
blower 4, connected with II. Internally The machine
ia quite complicated. within the outer casing there
are two cylinders. one revolving within the other.
1hcv rcvoi,c the same direction but the inner one
much faster Aar Tie other. Wood IS fed Into the fire
ole and burns IN such manner under pressure Tint
Il becomes charcoal before being hnAlly consumed.
and 80 give, ont intense heat It's ire lrnr' the
Is fci into his cylinder aud t.. Of course. heated
With H.
Here the inner cylinder gets In It's work. It has
scores and scores Of b!2wpipcs lon II. surface; ana
he pressure blower which connects with tie interior
N tho cylinder As the outer heated cylinder slowly
rcvolvcs the ore drop on The blowplpe, ard thus
furnished that everything I'm the hut tho precious
metal, and soft. powGsry ash IS burned In THIS
The force OF the blast Is such that tho lighter par,l
| les ~ metal and ash are forced upward and pre-
o. N
.,linders. Tho heavier particles are blown down
ward and forced into another tank OF water Nothing
lost n what is l"ft 81 the ore NJ Ill. tmo Is ~
miu.d the ash VIII found 20 Ice gs'"nlng with b
= gold the metal having been released from the re-
bclliors combinations which held It,
The process does not stop here spiral Keeps
Gathering up the sediment in the tanks and mixing
| II with quicksilver into an nmalgaml ready for tn
| retort Thus the Il put into The machine IN
chunks and comes out amslgamated. -,
| Tests have shown that one OF these machines VIII
| trea, ton and half Of refractory nm hour.
while larger machines Of the snm" pattern wiz have
. cspondlngy greater capacity. plant Of them
could be- run for comparatively litile money AS one
machines and pressure blowers. the only other tx
pcnses being attendance and tho wood or cosl-wood
lnrefcrrcd-lscd In the oNidzing furnace. Another
| nd can he taken apart. no part welghng over 300
mounds Therefore they can be easily Transported
over any mountain trail that n mule can traverse.
The ore at tho Recve mine at West Point Calavera'
MI; state \ tenstamp mill with COLONIZATION
nlant was tried ~ the mine, but II could not earn
1'XpcnseS Experts who have seen honVS mnchin,
work saws II elbows M tho ore NJ the ratio or tor
and half an hour and turns out S23 In gold Tor every
ten.
| since MoGtt mndc known his secret mining mer
have been coming 10 this city every day 10 Inspect
| he machine. The discovery has already created
Iautc furry In adjacent mining counties. and. "
fact wherever The particulars are known III" old
man declares that he IS not selling rights or territory
believe that be VIII go OF another tangent hrior
my Of the machines ready for tho market Whri
Nott was asked whore he got hi9 Idea he referred u
The story 81 N" gold that disappeared from tho mint
lie aid that 80 600 In gold once missed from
| he san Francisco Mint. No one knew where II had
| zone bui finally somebody thought Of gathering M
treated and $4,000 ~ The gold recovered Monlil
! mys he thought that would l." good way To smell
| ,rc and so tried II In his machine
1 an ufp At