The weekly miner. [volume] (Butte, Mont.) 1878-1881, 1881-10-18
From Fridays Daily.
THE ROWLAND PULvERIzER.
Its True History to Date.
It's Future as an Invention.

Regard for the truth, and for the future
OF a meritorious invention, compels us to
correct \ number of statements made in the
Inter Mountain, of last Wednesday evening,
in regard 10 the Rowland Pulverizer. The
statemea ut in the MINER of last Wednesday
morning hat the pulverizer in the Magma
Charts works was run successfully for a
time OH the preceding day, was exactly in
accordance with the facts. The machine
was invented and patented for the purpose
Of crushing quartz, and on the day referred
TO, from ten O'Clock on the previous day up
to eight o'clock six tons OF rock were sue
c~essfully pulverized, not including the lihe
lost by stoppages. That the pulverIzer did
not continue to work satisfactorily at that
time is to be ascribed to a number of causes,
the history Of which, as given by Mr.. W. E.
Hall, superintendent Of the Alice Company,
will be read with interest by everybody in
terested in mining operations and labor saw
ing inventions.
The definite success of the Rowland Pull
verizer is as yet experimental, as a matter of
course. 1t will be i'll operation again to-
morrow, and Mr.. Hall says that he would
have put it in operation again to-day, were it
not for the necessity of repairing boilers.
These repairs will be made to-day.
The language used by Mr.. Hall in regard to
the ultimate future of the Pulverizer is in
substance as follows: l have confidence that
it can be made a successful quartz mill some
too lightly constructed, particularly in the
upper part of it. 1t is now too tender for a
quartz mill, and men will have to be educat-
ed up to the use of IT.; it will be made a sue
cess one day, that is certain. The pulverizer
was made by Morey u Sperry, manufacturer
of Gold and Silver Amalgamating Appliances,
Nos. 90 and "a Liberty Street, New York.
The last time it was operated l hardly con.
slider that i: had a fair trial. This is the
fourth time that it has been stopped for re-.
may be made to answer by constructing il
much more heavily. The upper works pal
ticularly are too light, and the bottom would
wear out, as now built. As it is now, if the
rings or "rollers''-which revolve in Nha.
may be termed the pen, meet with anything
which destroys their adhesion to the mule,
plate, they fly up, and of course are likely tt
be broken, and to break anything with which
they come in contact. If the top of the pull
verizer were made at least four or five times
81, bnauur 81. II 10 t,e.J and Ia.uyJ h.tla s..uI
as cannon balls, were put in below instead Il
the rollers or rings instead of flying uI
and getting on top of each other as the lattel
do now, the balls would revolve smoothly
the sides of the pen being made to CORES
pond.
The above state lnent is a practical view, b.
a practical man, OF the Rowland pulverizel
The facts in regard to the trials already mad
as gathered at the office of the Alice Ccmps
ny, are as follows:
through the pulverizer. The ore is run frs
through the rock-hreaker, from which
comes out crushed smaller than an Englis
walnut. 1t is then passed into the pen, or til
lower part of the machine, where it. is sui
; iected to The action Of the revolving roller
which crush or pulverize it still farther uuti
it will pass through a forty screen, that is
screen containing 1900 holes to the squa1
inch, through which the ore passes at abo'
the fineness of sporting gunpowder. At fir
the pulverizer was run at a velocity OF ]:
which gave no very satisfactory results. TIL
was on October s, and after that experiinel
Mr.. Rowland was informed of the facts. +
then wrote sugsestinga velocity Of 100 or 20
and giving information as to additional detail
d Tins was tried at once--:he pulzerizer havil
/ been repaired in the meantime, with the +
u suit that the momentum produced was t,
great for the strength of the pulverizer
built a. present, it being at present made
cast iron. The t~hree-quarter inch castings
the upper part of the pulzerizer constitute t
screen frame.
. After leaving the screen the ore passes in
the Stun tanks, thence to the pans, and att
this point is reduced By the ordinary W
process.
II Police Court News.