New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1873-11-17

interest but the most important In q metaIurGicai
point Of view tho exhibitions made by Thos Whit
well OF his hot blast stoves, aud by c. William semens
OF process for the production Of iron or steel
The patent nre-briok stoves of Mr. Whitwell are In
tended to heat the bas Of iron furnaces The invention
IL represented by perfect model accompanied oy
full series of drawings and what Is better, by an IN
tebgent agent to explain IL. The stoves Designer
replace the ordinary iron pipes used for treating
the blast substituting for them a series Of fre-briek
chambers and passages which are heated by the
direct Of the flames OF the burning gases taken
from the furnace in the usual When the mass OF
brick ia sufficiently heated the ia shut of and the
blast ia admitted This in passing through the same
heated chambers acquires the temperature OF the bricks
The brick work Of course gradually coos down. but py
the time the last chamber begins TO be 700
cool, another stove has been heated up ana
the blast IL made TO pass through that
The stoves thus alternately heated by the burning
gas aud cooled by the blast. The advantages OF tnis
OF temperature of blast which cannot he counted upon
with iron pipes The bricks great storehouse OF
from any cause the supply of burning gas is stopped
The air being brought Into direct contact with inc s
faces previously heated by the gas absorbs the hes
quickly and with little loss The apparatus is SIMPLE
easily erected and is being extensively introduced r
cupola furnaces making coo week. two stoves, ~
feet square by Il feet high. and with 2,270 supernc
square feet of heating surface IN each, are necessary
DR.. q. William Sicnens Of London illustrates III
newy-proposed method or producing iron aud steer
directly FROM the ore, by models OF the furnaces ad az
terias employed Tue chemistry OF iron meallurgy Is
indebted to DR.. siemens for many valuable CONFIRM
tons not the least OF which is his lecture before VA
Chemical Society, March last upon smelling IRON anu
steel In hatlecture he gave in considerable DE 9
him 10 adopt the direct Briefly stated, this pro
consists in smelling successive charges o. ore III
rotary pudding furuace a charge Oh a2Vu. JUL, t' fbe
hundred weight Of crushed ore, mixed Win t tho
proper nuxins material. is placed edo in e, 1nS
from regenerative furnace, it has been brought to
red heat from5 TO cwt. of small coal added anu h
speed Of the pudder Is increased Inc reduction Oh
the metallic state proceeds rapidly tue cart
oxide evolved burned within the chamber and very
reduction is complete the puddler stopped, and the
fluid Stag is drawn of. The putdler IS then I o,a
rapidly the iron is collected into two three metdnV
balls which are Withdrawn and treated IN the usua
About two hours are required for charge anu acb
Stunning that 1000 POUNDS OF IRON are eot ouo tns ~
charge the furnace would produce about hie lons ~
puddled bar per diem IL Is claimed 10 no ieas s 70
push the operation 80 far within the rolaof as
produce caststee Mr. Siemens claims and undertahcs
to demonstrates that by tins process very great
of fuel effected For the lining OF the rOtaOry Puu
der after trials be has folnd mixture o1
caIcned Bauxte powder with clay and plumbaso 10 "
the best Three per cent OF clay and SIX per cent W
pIumbago give me best results binding materials,
BauXe is ferrugnous clay, containing u1 ntensc
four per cent u silica. Tile graphite un9er w ~ tso
heat reduces the oxide or IRON In the bauNle ., he
metallic state LinnSs 80 made nave Pgeh lCEN
very durable far more 80 than inc pest nre"ii0A'
rur MERITS AND DEFECTS OF THE AMERICAN COL
LECTION.
In speaking of the American display. II !. proper W
notice rOatory pudder exhibited by MI sellers Oh
Philadelphia before mentioning the extent OF the ma
tional exhibition OF iron ores and products neierss
pudder has from attracted great attention Inc
novelty of ITS FORM the single opening 'front.' ts com
pactness and 1nsh and the ease with when u Is ma
npulaed, all commend it TO iron men. ~ i p i
The flame passes IL, circuates aud passes Oui as
the end by which 1t entered on the OpposIte Ely
Of "A horizontal PARTITION which divides tne opeIiuS.
the other rotatOry pudders have openings a tue opp
med for charging and dschargng This pudder is so
cd nm a fTam
the furnace permit OF charging nom me IOt. ny
parts most exposed to the heat are protected On e ot
side by waterjackets The charges for this pnddlr are
10 be melted In an auxiliary furn9ce, saving Dot JIM
set of high rolls from the same cstapnhment also
deserves special mention ~ simple 1yurauc ~
rahsesnt me- nsn AZ one point by lever
con rolls the movement. Perfect ptraielism - h~lu
tanned and case of cloggng, tile rolls can DC sepa-
OF iron ores there is a very respectable exhibition
though the collections are BY means large and
complete as they should he TO represent me country.
fine of the Lake Superior ores N suppeu III Soou
ores of Essex County, New York. arc represented by
specimens contributed by Messrs. Wltherbee and SHEER
man. aud by Of wellseected samples OF the ores,
the fux the pgIDetal, and blooms collected 10y
Prof sliman at The mines OF tne Cntton C9ul-
York The only ron PennsyivaDia are
those sent by tue Dunbar Iron Works. very neatly
arranged collection. and specimens forwarded BY
Prof Mccoy OF Philadelphia. Indiana througb me
exertions OF Prof. Cox. the state GeoOgist mas nue.
dspay the block coal, iron ore ana pgron from inc
son hern part of rho state There are also ores on
Alabama and North Carolina The heaviest eoiieeuon
comes from Tennessee. Col Wilder brought wth nm,
after the exhibition had fairly opened, series oi
massive blocks of iron and Of coal together WIN pig
iron sections OF rails, and large blooms Ihis COZ
lection although it arrived very late was h0nored ny
medal. There does not appear To- be specimen ol
Bessemer or Martens steel the United states, ana
stranger industries Judging OF the country by the
exhibition. would infer thai these advanced ptGcesses
are not vet introduced. Fortunately, Messr5. fark
Hother Of Pittsburgh have sent few good samples OF
eSststee and very fine specimen Of hot Hanging FOR
boiler head which attracted the attention OF the jury
and received a medal The merits oil the collections
from Northern New-York from Alabama, Indiana ana
Michigan ere similarly recognized.