Dosing
The flow rate of bulk solids can be determined by dosing processes. Also the total amount of the product is measured. For the dosing it is essential that enough product is available.
Continous dosing of free flowing products
The dosing of easily flowing bulk solids is commonly realised as volumetric dosing. Because of varying product attributes it is often inaccurate, especially in case of granulates, pellets or grain goods. Gravimetric measurement has the advantage to eliminate these attributes.
Continuous dosing of heavy flowing products
Besides registration of quantities the dosage plays an important role in processing of bulk solids. Usually the dosing is performed by a volumetric controlled screw. Therefore it is necessary to assume a constant density of product. Effectively most products do not have constant density. To achieve an exact dosage a scale is necessary.