New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1890-09-30

thcn by inches wide. some OF WHICH ,,u the
lean mpos conveyed = the axe ths Ton
over gravity roads The tracks ex,en1 Sss into
OF 0lr .ns c i,;c. on" ore pocEcis ,.,,
Un the east ana west sides OF INC MN "a d,mp.
is hostcd up into the pocses over me claSnt'
These saprads run under the ,i,,t'n Of
H SerIet h"a ir Of ore IONS Ey
is orrsnceet the refuse Ill part. u the poI
eGy when sS.i saq Dseae. t' s s dumped sa into s
The mill built here is 'oy3O feet ana has no S"sr
$4,000 The machinery includes Ss cue eIsihe enc toIer
two drums for hosting skp', one ro: e
one Dlns srss sen 9S SET one e' i3neh wesrom
separator one shaking screen ana Is a,scst Of
Tho lsxalnch crsher breaks IS ot mmeh I expeSss III
sSF ;oa s sss s'yss
ss Ss;:s
ave sn rs' screen such material As recced BY thts
screen goes to the rolls Sna !, Is se,o %a
the sS ssy Mt ana We employ cs
,o;m a and as eesS
s sSa Sf sseai s;ssn
Crusiers. rolls elevator and screen III work au0"a'
vifss ' ss sss";e is
several po:s ana i then tSs Sy .o nss
pendn Of the crushed ore al the ,ia 10 L d meS
TONED M h rnt's sn are tia crush
i ipr or sisSg The concentrate. sore" produced
BY tho s ssp sn%sn T S. are
Wenstrom separator to take out any remaining ore.
The s1ss1 a ne M
machine and makes richer concentrates II carries ,,
OF Tne ana msns on the
other hand. carry Only ten am1eres and Is wound
with wire Of one.thrI the size.
THE DRYER THE BETTER.
largo amo,nt Of fine powdered orc ard enc
quarter inch screen-ore comes from the MlcMgamme
mine In O wet statc and in order TO make good
separation it must DO well dried. we have used loco
motive sand dryers Thov good, but their capacity
Is too small. We also use a dryer made BY using
haround cast Iron trough. sixteen feet long, with
spiral convcyor running In II. to mix up ana aga,e
tho wet, fine This trough Is set IN oricK' win
a frebox underneath to burn wood. Wet ore fed Into
the trough AZ one end out dry at the other end
whore II Is elevated into the POCKET from which 1t
runs by gravity to the separator Tbis dryer is cheap
and easily built. and by using ncavy conveyorAightS'
can e.lnadc durable.
TO avoid danger from fire and the cost Of fireman
to tend the dryer, are putting III revolving con-
hrS.sH -four o wssn a.s
1t sea on. e s"ie' srr sns a o md oros
dries the ore slightly different ISH n acs
Of The four small ones It is expected that this second
form will work satisfactorily when the i nnes are % no.
cxtr,mcly wet Tho drlcr tho material uAt IS 70 oe
separated, whether coarse or tine. the greater the
saacy Of the pSr p + 5 tons %
concentrates, and are daily concentrating loo 70
900 at cost Icudns srush: n1 1s pss.d Ina
conSeHrscs At this mill cost only 10 cent? MT ton ton
delivered In the railroad cars Including All the aso'e
lnelit! on'd items ot cost. , J., .,.,., o,,,,c,v
The quality Of the concentrates Is rclua'cd cn.G
Most Of concentrates VIII pass 34lhch s'uG.
though some which are p'"d TIe m,mc Evenings
90 directly 10 the separator as 81 or 50 per cent orr
sna g e e.. - per regard iris as
work Tho wssc.rock. resulting from the .epars',1n
Z" the o .sssnna o. %e oS Whenever Ell. vast.
prduct is consideIcd sufficient, rch !" wnr'.ht
r'ne, treatment is esc ,.c .nS srsr %n wv
The pr port on vast whcl' We NM rom rnHs
lager than ~, rpm ,an Inn hmm ," ore is Of "rr
r rad iii Ian the more frabe material which br,ass
INTO snail pieces IN nnine and forms ue ,, =, w.. Md
# n,atc4i We are cru-hIng. II furaa,". brs"r" -
aud 20 per cri Tor MT 81 our ptna ,anc, carry
from II to "a per c"nt Of iron. a; We brelt down M
far thc lar:e prJprlon OF or e. ~ a., q, ,orcr Der
"cnar oi ron could easily he Obtained by nnsr cru, r
"Hs would such r1aseev which nc ~ se rsy
good p and to taN end orc 81 oW cost and IN
4 .n[n ~ tat IL s rs' nl DC T fSrnsccs '
cor.idcr tho concentration OF magnetic oi"s y,
cc TO w. ~, in ~ ."ia Ian c @n T., r3cu.vey with
'nn unamNii v'nc ole or more drums. and 'lim no
liow ledge Of prlct: WIN o,hrr io ,hc "a, Wi, nm
doultnGly during the present year Mur, o ,no r,,
m"thods FOR concentrating iro, or wnrrn .
will be reduced and the output '' i"''"'' '
ORE DRESSING D ELECTRICITY.
FL Mcdowell Of Ncw-York. was the author
Of an addrcy, on Orc-DresSng by Ecct<ici,S ~ '"o
rulv +, stcr Mine The substance oil th's WAS
as follows: - ,o,,u,o
IN. electro magnetic ecpa.at"r OF e; tonh u,
eiG.s t, Vs., Sew YORK me, tlny OF the Institute, In
ri,rnarv I-oV h.o lccn IN successful opcla''nn "
we av,,,nsc, hch seem lie tho inevitable Nv
tcndants OIL pioneer cntcrpi'es III nc" " S.h tn.
,n,' me b. r. Tompn- has taken pain" to
coiiar hcr pr''n.a hy i' COT" ,"n, na k,ifui
meal manager Of thu Lschawaims lion ana "a i
oupsny whom our pr9i'|'in Is aleu'S ''' n',nc
U.,, ccrry IL Is b. icved mat tnc~c hiurc' VA
.".J those wEo are planning anliaf opera,nnS "
lie, c IIlp,n'ly WHAT ihey rSnc 1i y" ,,"U T
The local difcultic, IN the wa! vi ~, ex!cr'n"m,.
at t THY foster mne were many snu sra from tho
aS o"1 Of previous years. l. ore a"d hs r YATES
in content, OF i.oa FROM 20 TO :. per cent .,n Ynd
m. PARTICLES VI adcring mineral some IRON the 100.
ind nan;s wa e"tnsy narr; Lr roe eSpsI Sy n o,
means the lca, Of the numerous ten, which must
| lie charged ss,i,st the concentration. A'socate'
n, nUrnUIcIUt anu ul!ic'
r., me- ON I'm the non ma u. tic staic Whit must
| me- c.sirilv be washed away with the tallng,
Ihr waste dump was originally lorstcd with
,n,t rcic. cncc 10 future Treatment. and now can
| oniy lie h4ndlcd by mean, Of l"coInot;ve
oIuratln: over ciNy grades, The niineta' l. ~ widely
aud nneiy Disseminated through the orc that It hn'
nrcu nee. .Ssa,y 10 resort 1Shng. This wnci
the ,epa::,:iOnb intIc~c> the pOpoiti"
| Of slime. which cary oC acthanlcilN ~ii'ii pr
ticlc, Of mineral. Finally. the lean cainrle. q" int
ore cali :or the handling and conveying from inc l
| of large bulk OF tailins-. The process ihcludc'
crushing the by Elak" rock breaker OF the dump
| 4 i'm
INK IL under two Bail stamp. provided with >ciec'
Of = III inch ,l cl apg IL 10 the Conaiihg eccrita
| r,;iy bell. and dri'ring the concentrate, 10 ti'
| car, and the ,a,"s 10 Tia. settling reservoirs. II
an ~rc.ns simple enough IN printed description b
| Iuuy practical difficulties have itcu u't Hnd over
come hy Mr.. Tomb H.. 20 appreciate winch on" ms
visit the work. and note the cia!gcs which have brci
| made from time 10 tine with increasing experience
In ilc face Of thcn change, and t'c frequent accident
and break down! inc douia 10 the Introduction Of new
machinery the mill has been Erpt running almost ron
,lnoisy ten hour, ont Of the twenty fOur and this Ia
contributed rot n little to the success Of the under