Apr 24, roll crushers 1. roll crushers 2. size reduction size reduction involves reducing the size of particles so as to get more products. laws involved in size reduction are : ritteneger’s law ,kick’s law and bond’s law . forces involved in size reduction are impact, compression, attrition and.Ball mill crushers grinding mill mobile crusher ,ball mill. type mining powder production input size processed materials iron ore applications cement, coal, power plant desulfurization, metallurgy, chemical industry, non-metallic mineral, construction material, ceramics. overview features working principle specifications the ball mill is a key equipment to grind the crushed materials, and the.