Building materials - sieving with finest separations

13.02.2023,

Markus Hollbach, RHEWUM GmbH

Calcium carbonate is a material that originated from the remains of single-celled sea creatures over millions of years of Earth's history. Today, it is the basis for a range of commonly used building materials, including limestone and dolomite.

Finest separations up to 0.1 mm

A British customer discussed with RHEWUM ways to renew an aging installation for processing calcium carbonate. Several existing sieving machines and sifters were to be replaced. Fine separations up to 0.1 mm were performed.

Machines with direct excitation of the screen fabrics were planned as the machine type. Drives for the decks on which coarser separations were to be performed were unbalanced motors. The decks for fine separations were equipped with oscillating heads that allow the vibration to be changed during operation via thyristor controllers. The machine types of choice were then RHEsono, RHEmoto and RHEfino as a combination of both types. For the task of feeding the material onto the machines, RHEside feeders with lateral feeding were used.

Customer requirements were met

With this flexible solution, RHEWUM was able to convince the customer. Tests in the technical center showed that the required sieving requirements could be met.