Dear Kevin Sea,

Have a look at the following threads, which are also noted below your initial thread under “Similar Threads”.

https://forum.bulk-online.com/showth...erties-of-TiO2

and

https://forum.bulk-online.com/showth...Conveying-TiO2

From the remarks of the respondents, it can be concluded that:

-TiO2 (Titanium dioxide)

-high material density (4230 kg/m3)

-very cohesive (sticky in humid environment)

-sticks in bends (use flexible hose bends)

-abrasive (high hardness)

-fluidizable

-applied as pigment (very small particles 0.2 to 2 micron)

-small particle size causes poor flow properties after consolidation.

-various grades with different flow properties.

-rotary valves are not recommended, because of small particle size and abrasiveness.

-filter problems, due to small particle size.

-inhaled TiO2 dust poses health issues

As for the suitability for pneumatic conveying:

-one forum member states good convey ability

-one member states difficult convey ability

-one forum member states high velocities required

-one member states low velocities required

It appears that the pneumatic conveying part is no problem and that a pneumatic conveying design for the lowest energy consumption is dense- or at least close to dense phase.

The most critical part of the design is the feeding and discharging, caused by the small particle size.

Best option is to consult manufacturers and users of pneumatic conveying installations for TiO2 and use their experience and data.

Have a nice day

Teus ■

Pneumatic conveying of TiO2 is very common in paint industry but it is always considered a difficult material to convey. It is always lean phase I have yet to see a dense phase system running successfully with this material. The manufactures of TiO2 also use lean phase systems. Since the material builds-up in the conveying pipe higher than usual conveying velocities are needed. Normal metal pipes will be fine. Feeding into the rotary valve also requires special attention. ■