Chinese engineer Zu Chongzhi is credited with inventing water-powered hammermills in the 5th century AD. These ancient hammermill designs used the power of strongly flowing rivers to turn a water wheel to the mill. The same principle was later applied to water mills throughout Europe during the Middle Ages. The 16th-century German scientist Georgius Agricola – known by many as the Father of Mineralogy – utilized hammermills for mining operations during the Renaissance. The modern hammermill design is thought to have been developed in the early 19th-century, with the industrial revolution bringing the use of steam-powered hammermills. They became widely used by a number of industries in the 20th-century.
Since the beginning of the 21st-century, manufacturers have concentrated on building hammermills to deliver greater efficiency and reliability through cutting-edge design and use of modern materials.
Hammermills include a rotor with rigid hammers connected directly to a shaft or swinging hammers connected to large plates fashioned with support pins around their circumference. A hammermill typically consists of four or more hammers used to grind the material into smaller particles through impact. The rotor is supported inside a rigid metal casing that typically includes screens and sometimes corrugated liners to aid in the grinding process and to control particle size.
Common Hammermill Features Include:
A key element in hammermill design regards whether the hammers are fixed or swinging. Most modern hammermills use a swinging hammer design, with those with fixed hammers sometimes referred to as lump breakers. Hammermill design can differ based on configuration, coatings, length, number, pitch, and spacing of the hammers, which are often customized to provide optimal results for a specific application.
The following hammermill designs describe how they function:
Hammermills serve as primary, secondary, or tertiary reduction equipment, grinding material into specific particle ranges depending on the application. Their power and size also vary, with some electric motors capable of achieving extremely high horsepower.
Prater Industries has been manufacturing hammermills since its inception in 1925, with the company’s original hammermill design used in animal feed processing. Prater has worked to constantly improve the designs of its hammermills for nearly a century, customizing them to work with specific materials and for an expanding number of applications. The development of Prater’s innovative hammermill designs has multiplied the company’s capabilities for fabricating an array of reduction equipment, which is now used by a wide assortment of industries.
Prater hammermills are often customized for specific applications, particle size ranges, and output, while also designed to produce uniform particle sizes consistently over time. The company’s hammermill design also reduces downtime by allowing easy access to the grinding chamber for maintenance and cleaning. Additionally, hammers are often specially coated to extend their lifecycle and increase throughput.
Known also as its G-series hammermill design, Prater’s Full Screen Hammermills are easy to maintain and made to operate 24/7.
Benefits of Prater’s Full Screen Hammermill design include:
Prater’s Mega Hammermill helps bridge the gap between the company’s G-series hammermills and its fine grinders.
Benefits of Prater’s Mega Mill Hammermill design include:
Learn more about the Prater Hammermill and Mega Mill Hammermill by checking out our videos on YouTube.
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