Re: Continously Slurryweighing
Hello,
Comptrol Technologies has successfully measured the mass flow of sand in foundry applications using our Model 25M flow meter and our Model 25F feeder. These devices use very low velocities for flow measurement and wear is negligable. Check www.comptrol.com or contact me directly at lvienneau@comptrol.com if there are questions.
Regards,
Len ■
Re: Continously Slurryweighing
The curved plate of the Comptrol feeder would for sure be better than a flat flat impact flow meter but at relatively high feed rates e.g. over 50 tph quartz sand would eat a hole thru the plate and this would be still expensive to replace (and more than a flat plate)just like the vanes of the coriolis meter. You can coat the impact plates with natural rubber, ceramic or polyurathane but I have come across some quartz sands in the South of France that have put a whole in a coated plate in only a few hours because the sand particles were extremely sharp.
This is a common problem and many vendors claim the only perfect solution but the only way to stop real wear and tear in my experience is to coat the plate or vanes with the troublesome media. We glued quartz sand on to the plate and this meant that the sand now impacted sand and did not aggrevate the metal.
Try it you may be surprised. ■
Re: Continously Slurryweighing
Dear Sir,
I inquire as to whether your inquiry is still active?
Schenck Process manufacture mass flow meters using the coriolis principle and have a number of options for coating the wheel to reduce wear to a minimum. These units are used on numerous cement and coal plants, and have with stood the rigures normally associated with such applications.
I look forward to your response.
Kind regards
Stuart Metcalfe
Sales Manager - UK
www.schenckprocess.com ■
Re: Continously Slurryweighing
Hello
And thankyou for replying.
As I see it, coal is a low density material,with low wear "characteristics".
Cement is a wey fine grained material (d50- 12my).
Our quartz have a d50 - 100-300my.
How about wear resistanse with these particle sizes?
Tore Holmen ■
Re: Continously Slurryweighing
There are multiple methods to measure continuous weight, ranging from belt scales to placing the discharge silo on loadcells. Everything is dependant on your application including flow rate and space available for the equipment.
The two mainstream coriolis meters (Schenck MultiCOR and Brabender CDW) both accelerate the material with a rotating wheel. You will indeed experience abrasion of the vane and convergence cone due to the high velocity involved.
Without looking at your specific application, the Acrison Model 270 has the compact in-line packaging of a coriolis unit so should be an easy retrofit into the available space. The rotating weigh pockets turn much slower so the velocity-induced wear should be eliminated.
Click www.acrison.com/m270.htm for more info.
Regards, Delmar Schmidt
Melfi Technologies Houston
www.melfitechnologies.com ■
Continously slurryweighing
Hello
We are continously emtying a silo for a mix of sand and water, our problem is a steady continously mesuring of the sand weight.
Is there any equipment that can replace coriolis measuring system. Our problem with coriolis is abrasion and then pollution of the product. ■