Rudarski radovi br 4 2011 - Institut za rudarstvo i metalurgiju Bor

further testing, the laboratory plant was<br />
designed for slag granulation which will<br />
give large quantities of granulated slag,<br />
needed for the experiments.<br />
3. DESCRIPTION OF GRANULATOR<br />
The constructed granulator is mobile,<br />
so it can handle a variety of laboratory<br />
smelting furnaces that have different functional<br />
purpose. Furnaces are located in the<br />
laboratory in the Mining and Metallurgy<br />
Bor. The construction of granulator allows<br />
rapidly cooling of slag by jets, which are<br />
located on the front side of tank, just behind<br />
the cylinder, with a submerged part<br />
in cooling water. A reception cage, with<br />
perforated bottom, is below a roller, which<br />
accepts the resulting granules and those,<br />
after discharge the total amount of slag<br />
from the furnace, is removed with a crane,<br />
and after filtering, stored in a cage for<br />
granulated slag.<br />
In figures 1 and 2, respectively, are<br />
given the visual 3D reviews of constructed<br />
granulator of smelter slag and one of the<br />
laboratory smelting furnaces, which, as<br />
already stated, are located in the laboratory<br />
for pyrometallurgy in the Mining and<br />
Metallurgy Institute Bor.<br />
Laboratory granulator and furnace are<br />
compatible and work in conjunction when<br />
heated and molten slag is discharged directly<br />
into the laboratory granulator for<br />
rapid cooling. Then, the complex process<br />
of smelter slag hardening is carried out<br />
through its precrystalization and complex<br />
mineralogical transformation to a complete<br />
cooling of the same and formation<br />
the glassy fayalite structure with the remains<br />
of copper in some mineral or free -<br />
metal-elemental form in the total amount<br />
of about 1%.<br />
During the rapid cooling of slag, gases<br />
are released with water vapor, which accepts<br />
the hood where the condensation of<br />
water vapor is carried out, and the rest of<br />
gas with non-condensed water vapor is led<br />
into the system for waste gas treatment,<br />
which is so constructed to serve also the<br />
other laboratory smelting furnaces.<br />
Fig. 1. Visual 3D review of designed granulator for smelter slag<br />
No 4, 2011. 101<br />
MINING ENGINEERING