|Air classifier systems from process equipment manufacturer Van Tongeren America, Lebanon, Pa. (Van-Tongeren.com), automatically collect and separate dry particles by size range using only ambient air and gravity. Allowing the material to be kept dry upstream and downstream, these air classifier systems eliminate the use of water and aggregate companies throughout North America are replacing wet processing with this environmentally responsible, dry processing approach that conserves upwards of millions of gallons of water daily. Settling ponds to manage wastewater and costly drying equipment for moisture removal upon delivery are also eliminated while production efficiency is streamlined, worker safety improved and consistent product quality assured.
Ideal for dry processing salt, potash, fertilizer, fly ash, alumina, manufactured sand, diatomaceous earth, and a diverse variety of minerals, aggregates and other materials in 24/7 operation, these novel classifiers are designed using three different methods of classification, all custom-engineered based on the application to meet specific production goals and end product specifications. Operating entirely without moving parts for low maintenance, the gravitational classifier separates fines less than 150 mesh to 150 µm from more coarse material, the gravitational-inertial classifier separates fines from 300 µm to 63 µm, and the centrifugal classifier separates fines from 100 µm to 15 µm. The classifiers may be used in series to split feed multiple products at different cut points and often include a cyclone or bag house dust collector to meet air pollution control requirements.
“Our classifier has performed exactly as promised, our operators are very pleased and support from Van Tongeren has been superb,” says Steve Demeyer, process management manager at Luck Stone, Manakin Sabot, Virginia. “I’d strongly encourage people involved in manufacturing sand to take a look at this technology.”