Innovative solution for highly corrosive applications
With the CORESTM vacuum drum filter, ANDRITZ has developed an innovative, long-life solution, and very reliable filter design that offers maximum corrosion resistance.
Advanced design for high reliability
Vacuum drum filters are the state-of-the-art technology for highly corrosive applications such as producing titanium dioxide (TiO2) in sulfuric acid (H2SO4) processes or in processes where slurries with a high content of hydrochloric acid (HCl) are used.
The CORESTM vacuum drum filter is a significant innovation to prevent corrosion. The patented sandwich design provides a permanently chemically resistant surface and can be implemented with different materials to ensure resistance to chemicals. Depending on the size required, the structure itself is made of steel or completely of GRP (glass fiber reinforced plastic).
In addition, all parts in contact with the product are covered with a layer of corrosion resistant, non-reinforced plastic, such as PP, which is commonly used in the chemical industry. Furthermore, some internal wetted parts are made entirely of resistant plastic and are welded together with external surfaces made of plastic to provide a closed surface for corrosive applications.
In addition to corrosion, all forces and moments have to be handled. Thus, the structural design, including the shaft, the head walls of the drum, and the frame work of the trough, are made of steel, completely of GRP, or of a combination of both in critical areas, depending on the size.