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Volume 12 (1866) (428 pages)

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Page: of 428

Che Mining and Scientific Press. 89
(Written fer the Mining ana sclemiloc Prvas. .
Roasting of Sulphurets.
Messrs. Kvitors :—Observing an article on
this interesting snbjeet from the pen of Mr. J.
Mosheiwer, in a morning paper ol this city, in
which he extols a procezs of his own, at
the same timo asserting that ne other exists
whieh will answer the purpose as well, it may
interest the pablic to be intormed thit a cheap
and effeetnal process does exist, and that furnaees ¢un be eynstrncted cheaply for the pnrpose set forth, without tho necessity of our
miners entering into the maunfacture of crudo
sulphur and bisulphide of curbon, which are
comparatively valueless in this wurket, as Mr.
Mosheimer adunts. 1 do not eare to point out
the defects which most certaiuly exist in Mr.
Mosheimer’s plan, my ohject being ruther to
present in a favorable light the superior claims
ofa discovery, nude hy Mr. J. A. Peer and
myself, of an easy niethod of reductinn for sulphurets of ull descriptions. The necessary
papers have been filed in the Pateut Ofiee for
this invention, and it will be set in operation
immediately.
This discovery inay he briefly descrihed os
follows: A squaro hrick furnaee is erected,
with the ordinary square fire-box in tho:éamo,
ant two small semi-circular boilers uro so
placed in the fire-box us to leave a spaco hetween them for the passuge of the entire heut
upwards tn the hearth, around which the
flues pass. ‘Pwo steam-drume are placed in
tho briek-work «hove the hoilers, which furuish
sufficient steam to run any quantity of maehinery desired, as well as for the use in tbe
furnace which shall he described presently.
‘Vhe hearth of the furnace, the most important
part of the invention, is constrocted either of
soap-stone or fire-clay tiles, and is inelosed on
nll sides exeept the top,so as to prevent either
the draft or flume eoming in contact with
the ore henped up on its surface, ‘The sulphurets are mixed with a definite quantity of
powdered charcowl aud fine salt, and well
moisteued with water, and are then paeked
elosely upon this hearth to the depth of lrom
eight to twelve inehes, aceording to the capaeily of the fire-box for tuel. The muss is snffered to lie undisturbed for from three to five
hours, when steam is injected under the oro hy
ineang of 2 series of small pipes supplied from
inain pipes connected with the ,steam-druins.
No uttention is necessary exeept to keep the
temperature of the mass ata red heat for at
least three hours, when the steam is let on for
twenty minutes to force out what sulphur may
remaiu, and complete the oxidation of the particles of iron. Stirring is uunecessary ; in faet,
it would be fatal to the operation. A high
areh is coustrueted above the hearth, of sufficient area to allow of the expausion and free
passage of the gases arising from the hearth.
‘lhe flues from the fire-box also pass into this
arch, and the draft earries off all the fumes ns
soon as they have risen toa proper distance
froin the muss of ore. No partieles of mineral
matter, be they light or otherwise, can rise
from the hearth. beeause there is no eurrent
to carry then np. ‘he heat is never raised
80 hizh as to volatilize even silver. And eveu
if this slonld be the case, we are provided with
a condenser of an improve -canstruetion,
which will condense and precipitute all metallic Tames into a receiver, where they may be
collected and saved. Chuarcual is used for fuel,
hee:use it is the eheapest, giving out the most
heat ina specified time, and is without the
dense fumes and flames that aecompany other
species of fuel. W-here steam can be had from
huilers already erected, the furuaee may be
built without them, and supplied bya conuection with the exhaust-pipe or any other.
‘This' furnace is built with doors at each end
for both tuel and ore, so that, fora hearth of
the length of ten feet, there is but five feet distauee to work upon. ‘Phe mass of ore, when
the oxidatiun is complete, israked inte a ehute
and conveyed into the pan for amalgamation.
Another hatch may then be placed upon the
hearth in the same tanner. ‘lhe hearth may
be bnilt of any size, to hold aton or wore, with-/
out enlarging the fire box to more than uine .
square feet,. and by exteuding the flues. As.
an economical aud sure method of roasting
salpharets, this furnace process meets the ap-.
prohation of all practically scientific men who .
hrve examined it and teste its merits. ‘l’o
the impraetieable theurist it can of eourss only .
be a wonder, which it were a waste of time to
explain. A few words, hnwever, may uot be
amiss in illustration of the philosophy of this
diseovery. Tho sulphurets being intimately
mixed with powdered chureval, the sulphur
combines with it ina greut measure, nid is
coneumed with it and passes off in its fumes,
Just sufficient salt ig used tu assist in disengaging the sulphur from the ore, but nat
enough to forma chloride with the gold or
silver. The decomposition of the water in
tho mass allows the hydrogen to combine with
a portion of the sulphur, and this, being light,
rises Into the current and is earried off through
the ehimney. Raw stenut injected throngh
the mags svon becomes superliented and decomposes, and the oxygen combines with the
iron while the hydrogen carries off what snlphur may still lmyer inthe heap. ‘Pho burning
of the powdered chareoal leaves the imiss
porons and permeable hy tho injected steam,
so that every particle of the oro receives the
benefit’ of it. The most refractory ores of ‘all .
descriptions muy he treated in this way.
Neither arsenien! nor antimonial ores ean resist this treatment. They only require a little .
longer time thnn ordinary sulphnrots. Drawings and un experimental furnace, with some
of the results ol operations with the same, may
be seen on applicution te J. A. Peer, at the
Fulton Fonndry. As soon as a model of this
useful invention enu bo completed, we will fnrnish you with an engraved illustration of the
same for the henefit of your readers,
W. I. Mannrno.
<a
(Weltten Yor tho Mining and Scleniific Press.}
Letter from J. H, Ormton,
We have before us a letter, dated Austin
Nevada, Januury 30th, from “J. TH. O.,” in
reply to the Reese River Eeveille’s attack
upon him and his former article. It is ahly
written, spicy, and equal to his subject, but as
it is out of the line of this journal to insert
personalities (especiallyover an assumed name),
we deem it just to quote only the inost argumentative portion of the letter :
* * * % *
Bnt seriously, all I have got to do is to treat
of the facts of the case between the Reveille
and myself touching the mills and miues around
Austin.
T stated that, in connection with the Reese
River district, thera were over 250 stamps,
either ready to work or heing made ready, aud
the Reveille affirmed,in reply, that thero would
not be 150 when all the mills were eompleted.
1 give you a hist of our mills :
Milla. Stonps.
Conlidence, Yaukee Blade. 10
himyjare, da, .
Melnconm, do,
Midas, do.
Butte, do.
Keystone, do.
Anstin and Colfax, dv.
Silver Hill, Austin.
Manhattan, do, .
Boston, do,
Ware, do.
California, do.
Coin, 0,
Hildreth, do,
Pioueer, do.
Clifton, do.
Parrott, Big Creek. 16
Phelps, do lo
Eureka, do. 10
Lippett, do, eee 5
Total . scene tne cee nee enentoneeene
If the writer in the Reveille does not know
how many stamps he has got around his quarters, the foregoing list will be of value to bitin,
Tor it is certainly within ten or filteea stamps
of being eorrect. * * w :
J. H. Orwron.
Tae New Granana Mixes.—We have little
reliable information from the Barbaeoas mines,
New Granada, which, at present, are engrossing
the attention of the nore excitable portion of
onr community. ‘Phu district 1s located seventyfive or a hundred miles inland from ‘lontaco,
whieh port is situated ahout four hundred miles
from Panama. Our hest anthoritics agree
that the mines there hare been operated on
for years, that they are lucated in an unhealthy
climate, and are only to be developed under
many disadvantages. ‘ Whenever we can eommand any facts of real value to the readers of
the Press, eoneerning this district, we shall
not hesitate to bring them forward.
Nexr ro tus OLnest.—The Mountain Demoerat, published at Plaeerville, has entered upon
the thirteen year of its existeuee. With the
exception of the Calaveras Chroz/cde, it is said
to be the oldest paper in the State.
<_
TIieat De, Moxts.—his famous mine and
works were recently sold at auction, for the
taxes of 186-4, amounting to $608,01, to A.
Gamble. There is no provision for redemption
in the Nevada laws, in such eases.
1852: 1866
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BROOKS & LAWRENCE,
Gotnex fra Buiwoixe,
No, 643 Clny stree 1, near Montgomery, San Fraucisco
City College Laboratories,
Southeast Cov. Stockton and Geary ats.
Practical and Analytical Chemistry
and Metallurgy.
THOMAS PRICE,
Professor of Chemistry,
(Formerly of the Normal College, Swansea.)
WILL GIVE PRACTICAL INSTRUCTIONS IN QUALItative and Quantit ¢ Aualysis nnd Assaylig. The
course qnalities students ror thu Here of Gheinistr yr
to METALLURGY, MANUPAUTURING ARTS, and MENING
PURPOSES
PHARMACEUTICAL oid TECHNICAL CHEMISTRY,
such as Is required by Medical and Vhurmaceurical Studeuts, will be taught tosuch students ag may require it.
Course of General Chemistry,
Tvening Lectnres will be delivered avery Tnesday. at
half-past seven o'clock, P. M. In lie Philosophical And) of
the College, without extra charge to the students in the Institution, A
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REV. P. V. VEEDER,
Principal of the City College.
Gsdctt Or at 406 California Sirect.
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