Affect reason rock gold mine fully crushing&grinding

The affect reason for rock stone gold mine need fully crushing and grinding by gold mining machine

It's very common to see rock gold mine in natural mine, before it's getting separated by gold mining machine concentrator machine need fully crushed and grinded by mining machinery.And what's the direct reason of doing this?

The get the particle fully crushed and free it is a must,then into classifying system to get the useful material finally to get the material into concentrator machine for gold concentrate.The gravity separating need a fully separated particle the smaller in size,the better in separating. It can also make the whole plant in more efficient and reduce the clay during the separating process.