40
MESSRS. SCHNEIDER AND CO.’S WORKS.
The maximum water pressure employed is 430 kilo-
grammes per square centimetre (6115.9 Ib. = 2| tons per
square inch) ; the pressure used varies with the size of
the ingot to be compressée!. The depth of the pit where
the press stands is 7.400 metres (24 ft. 3 in.).
The ingot moulds employed in this process have to
withstand a very heavy pressure, and are specially
designed for that purpose. They are formed of a series of
consecutive size being 50 millimétrés (say 2 in.). There
i are, therefore, seventeen sizes of ingots. The weights are
! as follows :
Tons.
Smallest ingot .670 metres (26f in.), weight of
inould ... • ■ • • • • ■ ■ • • • • • • • 38
Weight of ingot ... ••• ••• ••• 16J
Largest ingot 1.470 metres (4 ft. 10 in.), weight of
inould ... ... ••• ■■■ 108
Weight of ingot ... ••• 75
-3.200__________________
1.700
§
odO----->
.480 ....^250. ................—......................................J.8KL.
65-Ton Collecting Ladle.
cast-steel rings 1 metre (3 ft. ^n-) joined together
by means of strong bolts. The inside of each mould is
covered with cast-iron staves, lined with highly-refractory
sand 20 millimétrés (f-in.) thick.
Compressed-Steel Ingots.—The smallest compressed-
steel ingot made has a diameter of .670 metres (26f in.),
and at the present time, the largest is 1.470 metres
(4 ft. 10 in.) in diameter, the difference between each
Casting is done by means of the 35-ton and 65-ton
collecting ladies (see Figs. 91 to 93,) as already des-
cribed, according to the weight of ingot. Hydiaulic
lifts placed overhead are used to bring the ladle above the
ingot mould, and others placed underneath, push the mould
when it has been filled, under the press. Lifting ingot
moulds and ingots after tlie operation, is done by the
150-ton electric travelling crâne. The advantages of com-