Gravel ball mill is a grinding media ball mill grinding equipment. Gravel generally taken from grinding grain before an appropriate level of fragmentation products, Also available from the preceding discharge ball mill grinding of gravel or pebbles used. Gravel ball mill and ball mill is basically the same structure. The long ball mill diameter gravel than the D/L=0.5~0.7. As ball mill productivity and ball mill grinding media density is proportional to, Therefore, the cylinder ball mill size gravel productivity than the same ball mill  larger, Liner wear is higher. Ball mill liner directly affect the shape and structure of the processing ball mill gravel and effective running time. The ball mill liners generally requires the ability to grip the grinding media, The formation of "self-lining" to reduce the ball mill liner wear, Efforts to enhance the ability of materials and minerals between the crushing effect. Therefore, the use of trapezoidal mesh lining and liner, or a combination of both. The use of rubber liner wear is a trend. The ball mill discharge gravel mine all mine for the lattice-shaped row. Gravel is an ancient mill grinding equipment. The ball mill advantage is energy consumption, low production costs, to avoid metal contamination of materials and so on.