Dry Grinding VS Wet Grinding - 911 MetallurgistMay 25, 2017 . The choice between wet and dry milling is, in general, unimportant in small-scale milling but is a major technical problem when large-scale milling in the metallurgical industries is involved. On purely mechanical grounds it is difficult to see any great difference in fundamental principles between wet and dry.wet milling and dry milling of gold,Gold Milling Process -Primitive and Basic - 911 MetallurgistMar 19, 2017 . I have assayed many samples of this refuse rock, which carries from 3 to 10 pennyweights of free milling gold to the ton, so that it is quite worth milling .. They are stored away in jars while wet and allowed to rust, and after a time they are sometimes re-crushed and re-washed ; very often, however, they are.