Mill (grinding) - Definition

A grinding mill is a unit operation designed to break a solid material into smaller pieces. There are many different types of grinding mills and many types of materials processed in them.

Historically mills were powered by hand (mortar and pestle), wind (windmills) or water (watermill). Today they are also powered by electrical power.

Types of grinding mills

• Ball mill
• Wiley mill
• Hammer mill
• Disk mill
• Flour mill
• Mortar and pestle
• Oil mill

Types of material processed in grinding mills

• grain - as part of the process for turn the grain seed into flour
• ore
• crax is milled into meat and bone meal

See also

• expeller
• extruder
• vegetable oil.
• mill stone