What is aggregate screening
Aggregate screening equipment is used to classify and sort rock, stone, sand, construction rubble and other materials by size to produce finished aggregate products that meet specification requirements for use in construction materials like base gravel, concrete and asphalt.
Material is fed onto a vibrating screen box that contains 1 to 4 carry decks with different sizes of screen media (mesh) attached. As the feed material travels across the screen, it falls through the screen openings onto conveyors for stockpiling or further processing.
The screening process is arguably the most important process in aggregate production. Unlike crushers that crush rock and produce material, screens only size material that has been reduced in size by the crusher. The crusher produces the gradation, but the screen produces the specification. Until the crushed material is successfully screened, no money is made.
While all screens are developed to sort and classify material by size, some are application-specific and designed to perform a specific range of duties like scalping, washing, and dewatering. The type of screen required depends on the application and material required.
Grizzly Bars and Grizzly Feeders are the most common types of screens used for primary scalping. They are used to pre-screen (scalp) and remove over or undersized rock and other undesirable material that could cause damage or affect the overall performance of the crusher.
Optimizing crusher performance at this stage also improves liner wear and reduces downtime.
Washing screens, also known as wet screens, are used to remove unwanted materials like silt, rock dust, and organic material from rock, stone, and sand to produce material that meets construction specifications.
Dewatering screens have a wide range of uses, including removing water and slime and scrubbing washed sand, rock and stone. They produce a drip-free product that is immediately usable or salable.
We’ve teamed up with industry-leading manufacturers Powerscreen, Evoquip and Terex Wash Systems to bring you the most innovative screening solutions for most aggregate, mining, recycling and washing applications.
Powerscreen and Evoquip mobile screens use high efficiency inclined and horizontal vibrating screen boxes that provide high output capacities and accurate separation for screening in mining, sand, gravel, aggregate, recycling and demolition applications.
Track mounted chassis’ provide mobility and a stable operating platform with easy onsite positioning and mobiity.
Mobile screening equipment is self-contained and requires no external source to operate making it ideal for remote locations or sites where access is limited due to space constraints.
Powerscreen Mobile Screens
Chieftain Screen Range
Powerscreen® Chieftain mobile incline screens are designed
for the processing of aggregates and sand.
MACHINES IN THIS RANGE INCLUDE:
• Chieftain 1400
• Chieftain 1700 (2 & 3 deck)
• Chieftain 2100X (2 & 3 deck)
• Chieftain 2200 (2 & 3 deck)
Warrior Screen Range
Powerscreen® Warrior heavy-duty screens are rugged, versatile and capable of screening a wide variety of material in the most difficult applications, including recycling, aggregates, compost, topsoil, coal, C&D waste and mineral extraction.
MACHINES IN THIS RANGE INCLUDE:
• Warrior 600 • Warrior 800 • Warrior 1200 • Warrior 1400X/1400XE • Warrior 1800 • Warrior 2100 • Warrior 2100 Spaleck • Warrior 2400
Evoquip Compact Screens
Small enough to work almost anywhere and tough enough to handle the most challenging applications in aggregates, sand & gravel, top soil, construction & demolition and recycling applications.
Colt Scalping Screens
Colt Scalping Screens provide efficient screening solutions in both heavy-duty scalping and precision screening applications.
- Colt 600
- Colt 800
- Colt 1000
- Colt 1600
Harrier Scalping Screens
The Harrier range of mobile screens are versatile, robust and designed for multiple industries tackling everything from the toughest scalping applications to fine screening.
- Harrier 220
- Harrier 750
Learn more about our brands.
Powerscreen Inclined and Scalping Screens:
- Warrior heavy-duty scalping screens – Recycling, Aggregates, Compost, Topsoil, Coal, C&D Waste
- Chieftain mobile inclined screens – Aggregates, sand
Evoquip Compact Screens are built to excel in both heavy-duty scalping and precision screening applications in aggregates, sand & gravel, construction and demolition.
- Evoquip Colt Compact Screens
- Evoquip Harrier