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

THE METALLURGY OF ANTIMONY.
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2. Refining in Reverberatory Furnaces.—Reverberatory furnaces
are, or were, used at Milleschau, at Banya, at Siena, and at
Oakland. The bed of the furnace should be tight, and should
be made of materials capable of resisting the action of the fused
alkalies used. The best material is partly weathered granite,
newly cut stone being unfavourable. A mixture of burnt and
raw clay can be used, if such stone is not available. In this case
the mixture should be rammed hard into an iron pan.
Figs. 59, 60, 61 show the construction of a furnace of this kind
as built by Hering at Milleschau and as recommended by Helmhacker.
FIG. 59.—Section EF.
The following is a description of figs. 59, 60, 61:—