Idaho County free press. [volume] (Grangeville, Idaho Territory) 1886-current, 1890-06-27


and free a,with oxygen, or substances
which, like the oxides of iron and man.
ganese in presence Of silica, will yield
oxygen in sufficient but limited guam
tity, the iron of the mono-sulphide with
the silica, will then appropriate this
oxygen and give up an equivalent guam
tity of sulphur in substitution for the
same, to combine with the other metals
30 long as any of these are present;
forming, thus, the sulphides of copper
lead and silver, as is desirable, before or
during the fluxing of the accompanying
ganpue. The oxides of these metals, II
present. and al their oxydzed COM
pounds will also he converted into sui
phides by the direct substitution OF the
sulphur OF the iron sulphide for the
oxygen of the other metals, with stimuli
taneous formation OF iron silicate, or
Stag. Now. as stated in my last paper, il
Is clear that these reactions cannot be
depended upon in the reducing atmos-
phere of the blast furnace; ana further,
that the fine state of division and the
chemical contact of the particles during
the fiuxing, as Is necessary for these re
actions, are conditions incompatible
with blast-iurnace practice. These re-
actions can, however, be realized IN the
reverberatory furnace quite as we'll as
In the assay cruc,ble. Until recently, |
felt that they were applicable to rever.
beratory smelling alone; but short time
since the thought came to me that II
would be entirely practicable to prepare
the fine ore for blast. furnace smelling
by first roasting it, for this purpose OF
sulphuratlon, in a "Bruck ner's Cylin
der" or other rotary contrivapce, viii IL
temperature sufficiently high to produce
"frtiing," or aggomeratiun OF the
charge, and then passing this plastic,
agglomerated material through water
cooled bricking rolls, aud 50 pressing 1t
into suitable blocks for blast furnace
smelling.
The difficulties to he anticipated, are
many and great, but believe that they
are not fatal. Such a practical working
process would solve the fine ore, or
Concentrates" problem.
The degeneration of roasted copper
ores for blast-iurnace smelling is spoken
of by Vivian, who leaves us to infer
that II Is impIactlcable on account of ex-
cessive temperature and iuel require
ments-lf the fluxes necessary Tor the
smelling mixture be added to the roast
ed ore, with proper allowance of coal
dust, and little crushed Stag TO start
the frlttlDg or fusion, the whole being
thOroughl, mixed, then the ordinary
high roasting temperature will be found
sufficient, and the extra fuel used will
be partly offset by the reduction in the
amount needed tor smelling; while the
iap''ny =. 'ile ius'oh in the oiast-iut-
maze mi'i 20 cor'eSponuihgly Increased.
ms mats suiei,,hg lor SILVER AZ
"""p'e" ~ urinary anu oAiul2eu
80 u'p'u,'Aa' 10 W oe euee'eu'
anL' seP' ~ iaio eaeer, NE a'aiiaoie
eu'p"ui'A'ns n'a'eI'"' WIN DO ia" Ply
I've W ~ ''o o'.s. as sreauy stated
70 qu'o p,ao'ieao'e 10 com p,ste'y sui
p'"i.Ae WIN 'he mo"V suipLiue aiohe;
o"' ~ 10 "'e" uo''iauis' III ihost cases, To
ue ao'e W u'il'iHs' ior ,his purpose OF
sa'ppu' iAs'io'' ,''e sulphur liberated ny
',e neas iIoin ne ia" pyflte, or W-su-
pniue VI mn. for, since ttis liberated
sulphur Is JUST equai Ill amount 10 that
Ie,a'neu Wy 'ne iron aiter fusion, II Is
e'iuen. 'na'' II we could completely
u,''@e III we "ouiu make clear gain OF
oo pei ceh.' III 'nose cases IN when We
may won " ','aA onr .hat'e prounct as
iase 40 poss'p'e' Onioftuhaieiy, THIS
sulphur Is par''y u's'iiieu AT so low
'. .l! as W ienuer us complete
u,iiAa''oh So"'e" WAT ulihcnIt. The sui
pnu. 70 s'Neh oii g'auua'Iy from pyriies
as .ne temperature increases, and 1t is
eViuen' 'na. several intermediate COM
poanu' "a i'on anu sulphur are formed
oe'o.e 'he 1hai REDUCTION OF the mono
su'p"''s, 'ne oonipoui'us fez 30, res
On anu rec % are known, and these
caI'y g. anu -, respectively, OF the
surplus sulphur OF mat portion OF pyrlte
10" 49,. e"nu' may nave oeeh iorm-
co. riooaoiy' an THESE retain their por-
n1ns .; 'n'S su,piuI up 10 temperatures
:. 70" 'el'",niy oe "'iiIzeu'
u'irNe' pi"e',oaiy' 'he largest pos
sioie Piopo''ioii Vi 'ne Tree sulphur, Its
V"po'' 40 sum a" SET i'ee' must come In
" goh'"e' WIN .sa'en 'uetaiic PARTICLES.
10 avoon, p''nn 'n's, we hheiy crushed
oAio'1eu oies' WIN considerable
pol''oh os iIon oA'ne-which Is 10 be
s"ueo' NJ. e"i charged
nrs. III 'no ,o'a'S saic'ner win coal
uus' enousn " purity 'euuce all The
IRON oA'oes "nioii may ne present and
whicn are 70 oe auueu AFTER as VIII be
exp.aiheu IN uue une anu: aiter heat
ing lii's ni,A'uie un'ii suuic'eht guam
t,y % heea' 10 teuuceu' ana until the
wno'e enalse 70 o.ouent 10 high roast
Ing 'enpe,a.u.e' VIC pyrtous portions
y. u'o eu oI auueu ~ several doses,
'"a. ai,;o s't 10y 90 hoe'ateu I'M
,; o, TIC rots,;on " ns 'V d. It's apsorp-