Home made Impact mill rock crusher for gold ore.Apr 27, 2015 . This video examines the makeup and use of my home made impact mill rock crusher for liberating gold from gold ore.crusher for extracting gold,DIY Impact Mill/Rock Crusher - Crush Anything (Gold Ore, Circuit .Oct 11, 2015 . I built an impact mill that will crush a 4" rock into powder in under 1 second. This rock crusher is also known as a chain or a flail mill. I also run some a.