Size Reduction by Grinding as an Important Stage in . - IntechOpenMay 23, 2012 . 17 ÷ 25%. Roller mills. 7 ÷ 15%. Ball mills. 6 ÷ 9%. Jet mills. 1 ÷ 2%. Table 1. Range of achieved efficiency for selected grinders techopen .. analysis for smaller grain is performed by sedimentation, which allows to separate grain of. 1 ÷ 40 μm. ... grinders for processing polymer recyclates (fig.ball grinderfor crushing sediment,Mills and Crushers | Lab SynergyChoose from a long list of products including planetary mills, ball mills, cutting mills, rotor/beater mills, jaw crushers/disk mills, mortar grinder, vibratory sieve . Jaw Crushers are designed to be the first step in the crushing process of hard-brittle materials like coal, quartz, chalk, glass, hydrological sediments and many more.