XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 243
0 0,5 mm
a b c
Figure 17. Amphibolite, thin sections Nr.: 3008 (a), 3009 (b), 3010 (c). Gneiss, thin sections Nr.: 3011
(d), 3012 (e), 3013 (f). Magnification: 32× (Source: Popov-TUBAF/IART)
Table 6. Microstructural features and mechanical properties for Tungsten ore
Material Mineral Phases Avg. Grain Size, mm PLT, Is(50) in MPa
Tungsten ore Scheelite, Wolframit, Quarz, Topaz, Mica 0.9 7.87
Table 7. Test Results for scheelite ore regarding specific milling energy reduction after treatment with electrical impulses
(average of three measurements)
Energy, J Frequenz, Hz Feed Rate, %
High-Voltage Electrical Impulse
Treatment Total Energy, kWh/t
%Reduction Specific
Milling Energy
140 3 40 0.52 20.0
140 3 60 0.47 14.7
140 3 80 0.43 13.7
280 3 40 1.04 9.3
280 3 60 0.95 19.3
280 3 80 0.85 15.7
140 10 40 1.73 14.0
140 10 60 1.58 15.3
140 10 80 1.42 9.3
280 10 40 3.46 20.0
280 10 60 3.15 5.0
280 10 v 2.84 9.3
0 0,5 mm
a b c
Figure 17. Amphibolite, thin sections Nr.: 3008 (a), 3009 (b), 3010 (c). Gneiss, thin sections Nr.: 3011
(d), 3012 (e), 3013 (f). Magnification: 32× (Source: Popov-TUBAF/IART)
Table 6. Microstructural features and mechanical properties for Tungsten ore
Material Mineral Phases Avg. Grain Size, mm PLT, Is(50) in MPa
Tungsten ore Scheelite, Wolframit, Quarz, Topaz, Mica 0.9 7.87
Table 7. Test Results for scheelite ore regarding specific milling energy reduction after treatment with electrical impulses
(average of three measurements)
Energy, J Frequenz, Hz Feed Rate, %
High-Voltage Electrical Impulse
Treatment Total Energy, kWh/t
%Reduction Specific
Milling Energy
140 3 40 0.52 20.0
140 3 60 0.47 14.7
140 3 80 0.43 13.7
280 3 40 1.04 9.3
280 3 60 0.95 19.3
280 3 80 0.85 15.7
140 10 40 1.73 14.0
140 10 60 1.58 15.3
140 10 80 1.42 9.3
280 10 40 3.46 20.0
280 10 60 3.15 5.0
280 10 v 2.84 9.3