A N T I M O N Y : ITS HISTORY, CHEMISTRY, MINERALOGY ...

THE METALLURGY OF ANTIMONY.
material; «i, the masunry wall, provided with draught-holes. The pot
is 12 inches in height, 8 inches in diameter, and holds 22 lbs.
At Malbo.sc (Ardcche), in France, the charge is 33 lbs. per pot
The receiver is emptied every forty hours, after four charges. During
this period, twenty pots produce 10£ r > lbs. of the sulphide, with consumption
of 3330 lbs. of coal and 448 lbs. of brushwood.
ft. Intermittent Liquation in Pots in Furnace.—Pots in a furnace give
greater economy of fuel and render the working of poorer ores easier.
The pots are placed on each side of the fire-grate in the furnace, or are
arranged in a circle around it. The receivers are either placed directly
below the bed of the furnace—in this case they are surrounded by
sand to prevent their coining into contact with the flame—or they
e, Heating ciiamber.
d, The grate.
/, Clay pipes.
FIG. 5.
b, Receiving vessels.
a, Pots.
cy Openings in the roof.
are placed entirely outside and are connected by clay pipes to the
bottom of the pots. The latter arrangement is more satisfactory, as
it does not necessitate the interruption of the working of the furnace
when the receivers have to be emptied. A ^ood example of the
former can be seen from the works at La Lincoule in France. This is
shown in fig. 4.
It can also be seen at Mlllesehau in Bohemia and at Banya in
Hungary.
Each vessel carries 20 kgs. 1500 kjrs. of 50 per cent, sulphide ore
requires the consumption of 0*46 to 0"49 cb.m. of wood.