A N T I M O N Y : ITS HISTORY, CHEMISTRY, MINERALOGY ...
A N T I M O N Y : ITS HISTORY, CHEMISTRY, MINERALOGY ...
A N T I M O N Y : ITS HISTORY, CHEMISTRY, MINERALOGY ...
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THE METALLUKi'iY OF ANTIMONY.<br />
A good example showing the receiving vessels placed uutside can<br />
be seen from fig. 5, as used in Hungary.<br />
An intermediate form is shown in fitr. 6.<br />
(b) Continuous Working.<br />
a. In Tubes.—Liquation in tube furnaces gives bettor results than<br />
those obtained with pot furnaces, the consumption of fuel beinir less and<br />
the production higher. Fi[i. 7 shows the construction of the furnaces<br />
used at Malbosc.* while fig. 8 shows another type ox tube furnaces.<br />
The tubes are arranged in groups of four, placed over four receivers,<br />
I, which are carried on carriages, c, with wheels There are three<br />
FIG. 6.<br />
grates, d, from which the flame, after playing around the tubes, a,<br />
escapes into the chimney, e is a hole in the side o: the tube, by means<br />
of which the residue is drawn out, the size being :!-7 ins. wide and 4'7<br />
ins. high. The hole is closed with a clay plug or with a luted plate.<br />
The size of the tubes is 3 ft. 3 ins. high, 10 ins. in diameter at the upper<br />
end, and 7 J ins. in diameter at the bottom, their walls being 0*6 to 0"8<br />
inch thick.<br />
It must be noted that a newly built furnace must be heated to a<br />
bright red heat for forty-eight hours before a charge can be started.<br />
The regulation of the temperature is an important factor, and is adjusted<br />
according to the colour of the product, which should be of a<br />
bluish tint, while a red colour is an indication that the heat has been<br />
too great.<br />
* This has been replaced by the apparatus patented by Herrenschmidt.<br />
73