If gold size +3mm, it can use vertical mill.Then without clay mine just need screen machine to separator big size, also if gold size is for 0-3mm, After scrubber machine it can to centrifugal, then to shaking table.  If gold size +3mm, it can use vertical mill.Why choose vertical roller mill to recovery gold For now global environment is become worse and worse, it need each of us to protect it, to love it.  It don’t need any chemical agent. Flotation and cyanide all need chemical agent to get gold. This chemical agent is bad for global environment. Vertical roller mill is easy to operation, after install, it just need open the switch, then can begin to working.