Institut za rudarstvo i metalurgiju Bor

copper ores, that is, now, almost exclusively
copper concentrates (with the previous
agglomerations) are: SiO2, FeO, Fe2O3
and MgO. In addition to thesecomponents,
slag often contains: Fe3O4, BaO, ZnO,
Cu2S, and almost always fine droplets of
mechanically affected matte (copper
matte). The composition of slag may not
correspond to the chemical compounds:
for example, FeO in slag may be present in
a form of fayalite (FeO)2SiO2, but the excess
of free FeO in basic slags may be also
dissolved in fayalite.
Table 1 presents the reserves in the
copper deposit Slag Depot – 1 Bor. [1]
Table 1. Total reserves in techno genetic copper deposit Slag Depot – 1 Bor
Useful component
Content
Reserves of ore (slag), t Reserves of useful components
Total Balanced Minable Total Balanced Minable
Cu, total 0.715% 86.567 t 80.062 t 65.715 t
Cu, oxide 0.202% 24.457 t 22.619 t 18.566 t
Cu, sulfide 0.513% 62.110 t 57.443 t 47.150 t
Gold 0.282 g/t 12,107.354 11,197.587 9,190.940 3.414 kg 3.158 kg 2.592 kg
Silver 4.50 g/t 54.483 kg 50.389 kg 41.359 kg
Magnetite 8.60% 1,041.232t 962.992 t 790.421 t
Molybdenum 0.0413% 5.000 t 4.625 t 3.796 t
Sulfur 0.611% 73.976 t 68.417 t 56.157 t
An enormous amount of dumped waste
slag, and also a large amount of waste slag
from regular and future production of
copper, present a range of environmental
problems, on the other hand, this
significant quantity of useful metals in the
residual slag, as a necessity, impose the
researches in a direction of their valuation
and thus solution both for ecological and
techno-economic problems. The result of
research is launching the industrial testing
of flotation concentration the useful metals
from which the industrial production was
also resulted. In the period from 2002-
2006, 1 284 346 tons of slag was treated,
from which 3 870.451 tons of copper,
69.4093 kg of gold and 457.804 kg of silver
were obtained.
Table 2 gives the results of
experimental production of copper
concentrate in the Flotation Plant Bor, in
the period July 2002 – December 2006. [2]
Table 2. Technological results of slag processing in the period from 2002 – 2006.
Elements of Unit
Year
treatment measure 2002 2003 2004 2005 2006 02-06
Wet slag t 159,117 334.831 271.624 138.963 388.874 1.293.509
Content of
humidity
% 0.53 0.622 0.763 0.85 0.742 0.708
Dry slag t 158,275 332.749 269.551 137.783 385.988 1.284.346
Copper in
slag
% 0.664 0.565 0.529 0.792 0.716 0.639
Copper in
slag
t 1,051 1.881 1.426 1.091 2.765 8.214
Gold in slag g/t - - 0,134 0.193 0.260 0.205
Gold in slag kg - - 36,21 26,568 100,21 163
Silver in slag g/t - - 3,789 2,934 3,369 3,435
Silver in slag kg - - 1.021 404 1.300 2.725
Wet
concentrate
t 5,950 12.164 6.834 3.670 8.951 37.569
Content of
humidity
% 12.17 13.16 14.84 14.77 12.16 13.23
No 1,2010. 110
MINING ENGINEERING