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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120 TUB METALLURGY OF ANTIMONY.<br />
The by-products produced in all these processes are liquation<br />
residues, matte, slags, refinery slags, and flue dust. They are added<br />
to the charges in smelting the ore, if they are sufficiently rich;<br />
the liquation dross, however, is subjected to a preliminary roasting,<br />
and the flue dust is intimately mixed with lime, before smelting.<br />
Liquation residues are also sometimes treated separately in shaft<br />
furnaces.<br />
Method of extraction<br />
Furnace used .<br />
Analyst .<br />
Sb<br />
S<br />
| Fe<br />
i Ni<br />
Cu<br />
! As<br />
Au<br />
1. 2.<br />
Precipitation .<br />
Reverberatory .<br />
Helmliacker.<br />
94*5<br />
2'0<br />
3-0<br />
0-25<br />
traces<br />
84-0<br />
5-0<br />
10*0<br />
3. 4.<br />
By reduction of<br />
oxidised ores.<br />
Shaft furnace.<br />
97-2<br />
0-2<br />
2-5<br />
95-0<br />
0-75<br />
4-0<br />
0 : 25<br />
5.<br />
From Fahl-orespiess<br />
desilverised<br />
by amalgamation<br />
in the Stephan<br />
Works.<br />
90-77<br />
2-0<br />
| 1-50<br />
573<br />
4. Other Processes.—(a) At the Stephan Works, in Upper Hungary,<br />
antimony is extracted from the spiess, which has been desilverised<br />
by amalgamation. The spiess is obtained from the smelting of fahlores.<br />
The antimony is extracted by using pyritic ores in a shaft<br />
furnace. The copper is thereby converted into sulphide by the<br />
sulphur of the pyrites, and the impure antimony obtained is refined.<br />
({$) Pelatan* smelts the following mixture in a reverberatory<br />
furnace:—<br />
Oxide of antimony . . . . . . 53<br />
Sulphide of antimony . . . . . 40<br />
Coal * . 7<br />
100<br />
It is only necessary to liquate the rich sulphide ore and to oxidise<br />
the poor sulphide ore in order to obtain the sulphide and the oxide<br />
required for the production of the metal. Refining can be effected<br />
with an alkaline flux.<br />
(y) Basse patented t in 1907 the following process. The advantages<br />
of this process are : —<br />
* French patent No. 210,331, Dec. 19, 1890.<br />
t French patent No. 375,872, March 19, 1907.