Continuous feeders typically operate continuously 24/7, except when maintenance is done. All components operate as a single system. With the increased equipment utilization and the economies of scale involved with continuous feeding result in cost savings and operations efficiencies.
Volumetric feeders or gravimetric feeders are used to deliver bulk solids material into a continuous process, depending on the characteristics of the materials involved, and the process requirements.
Some people choose volumetric feeders for continuous feeding. Volumetric feeders are used in continuous feeding when there is a consistent bulk density of the material fed, or where high accuracy feeding rates are not required. The final discharge rate is determined by a constant feeder speed and is not controlled by data feedback from the process.
The actual amount of material delivered in the feeding process can vary over time since continuous feeders cannot detect or adjust changes in the material's bulk density. If you have high accuracy requirements, we do not recommend volumetric feeders for continuous feeding.
If you have rigorous accuracy requirements, gravimetric feeders are optimal for the continuous feeding process. There are two main types of gravimetric feeders: loss-in-weight feeders and weigh-belt feeders. Gravimetric feeders have the capability to detect and record moment-by-moment feeder performance during the continuous feeding process.
Gravimetric feeders provide accurate feed rates and immediately alert the operator if there are any interruptions in material flow. Gravimetric feeders offer moment-by-moment data, which helps achieve appropriate process control.