Electric three-roll mill is a equipment used for malt crushing, its main working principle is to use the rotating motion of three grinding rollers to grind malt into uniform fine particles. This equipment is usually used in the beer brewing process as a pre-treatment for malt crushing.

The design principle of the malt crusher is to use a rotating extrusion to grind the malt into small pieces while filtering it through a screen into fine particles. This equipment is often used to break the malt into smaller particles to better extract the sugars and flavors in subsequent brewing processes.

There are some differences in the design and application of electric three-roll grinder and malt crusher. The electric three-roll mill is mainly used to grind the malt into finer particles, while the malt crusher is mainly used to grind the malt into small pieces. In the beer brewing process, the two devices are often used in combination to complete the pre-treatment and crushing of the malt.