minerals in each grinding was independently separately
ground in a laboratory stainless steel ballmill with stainless steel medium
for 60 min. 5 g of sphalerite, galena, pyrite or chalcopyrite single
mineral and 12.5 g in total of mineral mixture either sphalerite–pyrite
or sphalerite–chalcopyrite or sphalerite–galena that was b106 μm was
conditioned with 50 cm3 water using a magnetic stirrer and the slurry
sample was collected successively after 0.5, 5 and 11 min conditioning