Burlington weekly free press. [volume] (Burlington, Vt.) 1866-1928, 1916-03-16

the now cloctroytc refining process will
after this state of affairs lie writes
in part as follows:
Bolivia does not produce tin. but tin
ore not the metal but the mineral.
rue there is some smelling done in
boliVia, but the metal produced being
uhfcl'ned' Is not of the quality that the
United states demands. rin has many
uses nut these may be- grouped under
'hree general heads: First. as an un-
aloEeo metal: second as an alloy with
copper ENC anthony, lead, and other
'ncta's; third, AZ a plating for iron, steel,
copper and other more easily corroded
metals. Under the first head tin Is
used in making certain pharmaceutical
ana scientific Instruments. and tin foil.
hder the second, it is used in the pro-
duction OF bronzcs, gun and bell metal.
pewter the whole group Of so-callcd
white metals, etc it's use az an alloy
being almost unlimited.
III is under the third grouping, tin as
plating that the great bulk of tin i'm.
ports INTO the United states finds its en-
pIoNmcnt Common tin plate is iron or
steel ordinarily tho latter, covered with
p"tecting coat of tin. The property
which tin has of not furnishing or
ra Their OF being in a high degree resistant
TO the decomposing action of air. water
ana the common acids and akalis Is
what gives the value to IFS use as n pro-
tcctlve coating for the easily corroded
iron and steel. The strength and Rightly
OF the steel protected by the tin fur
nishes an almost ideal material for the
fabrication of all kinds of containers.
III is the de ~ tho az n nj =, o
industry in the United States which has
created the demand for containers made
of tim plate and consequently for tin
itself with which to make the tin plate
The United States uses in the canning
industry, in The form OF containers, as
much tin plate as ali the remainder OF
the world combined According to the
Mining World Chicago. the importat ton
of tin into the United States in 1914 was
tL1oo short tons and in 1915 it amounted
| 10 t7,S, tons
Between the ore in the mine and the
finished tomato can there are number
OF mctallurgical. industrial and tcono-
mic processes and conditions which must
no understood in order TO answer the
! question why Bolivian tin has heretofore
not hcen extensively used in the Unite
! nearly all the tin plate used here was i'm
ported from Europe. principally from
Great Britain. The development of the
I iron and steel industry has changed this
| condition. so that at present little or no
! tin plate is imported. This country now
| makes all its plates and imports the
! tin with which to cover them Now tin
produced from Bolivian ore by the for
| ner methods of smelling contains i'm
! purites which render it less suitable for
! tin plating than the tin from the ore of
| the Straits. One of the impurities which
! make it unsuitable for plating is iron
| and from this impur1ty the Straits TN
| Is free. Feruginous tin. even though the
| iron content he exceedingly small, will
not readily adhere to steel and iron
plates. Hence tho United States was
| But the arts progress. Recently ad
| vances have been made in the industr,
Of tin refining and smelling. Elcctricit>
is notwithstanding tin refining. Electroly
! tic tin is almost chemically pure tin
| ANALYSIS show 999S per cent. pure, pro-
| duced from metal only ~; per cent tin
Bolivian tin can he refined by tho cleo
e. Refining Company has recently com
pleted AT Perth Anlhoy, \. j., plant TO,
the smelling Of tin ores and concen'
! trates. and the electrolytic refining o.
tin, and now the United States will doubt
less prove valuable market for the
| Bolivian product.