1. Ball Mill is a kind of grinding equipment, which is generally used in ore dressing process. After having crushed by crusher, materials will be sent to ball mill for grinding.

Ball grinding mill can conduct wet or dry grinding, hence, it can be divided into wet ball mill and dry ball mill. According to different discharging methods, ball mill machines can also be divided into grate ball mill and overflow ball mill. 

2. Free PDF: http://www.ftmmachine.com/products/ore-beneficiation/8.html?from=wjl