Roll Crushers & RollSizers are used throughout all crushing stages. They can handle the medium-hard rock as well as sticky and soft materials, for example lignite and mineral coal, clay, marl, limestone and similar raw materials as well as softer overburden and ores.
As the name suggests, the material will be crushed by compression between two rolls. Whereas hard to crush material will be reduced by additional shear- and tensile forces generated by high rotor torques.
thyssenkrupp Mining Technologies offers two types of Roll Crushers: Double Roll Crushers and Double RollSizers. While in principle the same, they vary in size and rotation speed.
Double RollSizers are basically available in two designs. For primary and secondary applications, crushing takes place between the crushing rolls; if a finer product is required, crushing takes place between the crushing roll and the housing wall.
The Double Roll Crusher has larger roll diameters and runs considerably faster. It also takes its crushing energy from the high moment of inertia. The comminution is mainly done by compression between the crushing rolls.
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