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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110 THE METALLURGY OF ANTIMONY.<br />
furnace is kept continuously in blast for three weeks, and smelts<br />
about 19 tons of material daily.<br />
Sb<br />
Fe<br />
S<br />
Fe2O3<br />
SiOa<br />
A12O3<br />
CaCO8<br />
CaO<br />
bb2b3 QVi CJ<br />
FeS<br />
Na2S<br />
C<br />
Dressed Ores.<br />
Raw.<br />
43-3<br />
14'4<br />
25*3<br />
117<br />
0-3<br />
3 3<br />
Calcined.<br />
48'9<br />
...<br />
0-7<br />
23*4<br />
23-3<br />
4-0<br />
...<br />
1-0<br />
"*<br />
...<br />
Oxidised<br />
Ores.<br />
46*4<br />
8'6<br />
2*4<br />
26*6<br />
...<br />
7*0<br />
. ...<br />
• 4 •<br />
Raw.<br />
21-4<br />
129<br />
15*1<br />
41 : 6<br />
0-5<br />
40<br />
4-0<br />
...<br />
Liquation<br />
Residues.<br />
Calcined.<br />
23*1<br />
2*-4<br />
17*3<br />
49-2<br />
2*4<br />
0 : 7<br />
Flue<br />
Dust.<br />
56*1<br />
6<br />
10 9<br />
•8<br />
The smelting mixtures are of two kinds:—<br />
Kilos.<br />
Calcined dressed ores<br />
A.<br />
550<br />
B.<br />
600<br />
Calcined liquation-residues . . . . 750 600<br />
Ores balled with lime 200<br />
Flue dust balled with lime . . . .100<br />
Raw ore 100<br />
Oxidised ore 100<br />
Raw liquation-residues 100<br />
Limestone . . . . . . . . 600 800<br />
Foul furnace-slags 400 400<br />
Refining slags 200<br />
Crude Sb, Metal No. Ill 100<br />
5*0<br />
Refining<br />
Slag.<br />
25-7<br />
5-9<br />
2-4<br />
53*4<br />
9*0<br />
The most favourable result is obtained when these mixtures are<br />
used alternately, two charges of A being followed by one of B.<br />
Lime, about 10 per cent., is used to ball up part of the washed ore<br />
to a compact mass, and 7 per cent, lime is used for the same purpose<br />
for the flue dust. This is only necessary at the beginning, for it<br />
is found that after eight days' blowing these stuffs can be charged as<br />
powders without interfering with the working of the furnace.<br />
The products are unrefined metallic antimony, slag, and flue dust.<br />
The antimony is divided into three classes:—<br />
I. II. III.<br />
Sb . 90-02 73-80 65*04<br />
Fe . 6-23 16-66 2S"80<br />
S 2'85 8-42 10-46