Originally Posted by meejay

Particle Size Distribution Measurement Device?

I need to find a PSD (Particle size distribution) measurement device. The device is going to be used to determine PSD of Phosphate rock which is the major raw material for Phosphoric acid.

The device should be able to seperate the smallest particles sizing + and - 63 microns. The device should be mechanical instead of optical when invesment costs are concerned.

So far I have found Hosakawa Alpine Airjet Sieve A 200 LS-N,

Do you have any other recommendations?

Dear Mr.Gulcek good morning,

I'm Mr. Baso from Cuccolini's company and we have several sieves to make this job but we need some more technical information.

Please can you contact me at this e-mail address:

baso.g@cuccolini.it

Awaiting your kind reply

Best Regards ■

Since you are looking for a PSD, you will need to have several cut points. Although your finest required cut point is 250 mesh (63 microns), this will still work OK on a Rotap. We do not sell this equipment but have one in our lab. I'm sure if you Google "Rotap" you will find the distributor. Please keep SWECO in mind when you start thinking about full scale separations...wet or dry...1" to 1 micron.

Good luck.

Tom Radank ■

You should look at other methods besides Sieves. There are many technologies out there that can work and will be faster and more accurate. Laser Diffraction, Electrical Sensing Zone, Sedimentation, Imaging.......

If you tell me some more about the particles and what you are looking to see in your results, I can further recommend something. ■

I forgot to say that if you are looking at an alternate to Sieves and you have historical data on Sieves, I highly recommend you look at technologies that can give you a Sieve correlation. That will take the Micron-size info and convert it to mesh size so you have a faster system to give you more accurate data but you can always relate the data you are getting to historical Sieve data you have in-house. E-mail me if you have any questions. ■

Dear Sir,

As your mesh size is too fine, you will definately require ultrasonic attachment to your vibro-shifter to increase your through-put from 3 to 30 times.

Regards,

Chetan

chetan@rooptelsonic.com ■

Use a device based on Laser Interferometry if you wish to measure down to 1 micron sizes.

A number of testing stations who perform combustible dust testing use such devices.

It should be easy to find a number of such devices by doing a simple search on, say, Google.

The brand "Malvern" has been used by SIMTARS (an ExTL near Brisbane, Australia) for a number of years, but use this only as an example of the type of instrument available.

You should also be able to get a measure of the particle size distribution and software to do statistical analyses on the experimental results.

Regards

Paul Spresser

Principal Consultant

EPEE Consulting - EEHA/Hazardous Area Services

www.epeeconsulting.net

Email: epee@epeeconsulting.net ■

We have a dynamic imaging based particle analysis system, that can measure accurately and repeatably down to 0.7um (solids suspended in liquids) or 10um (dry solids). Each particle is measured under a number of parameters (major axis, minor axis, area, perimieter, aspect ratio, circularity etc.), and the full particle size distribution in generated automatically on the operator screen, as well as being stored in data files. The software can also continually plot the D50 value as a function of time on the operator screen as the measurements are been taken and analysed in real time. Alarms from the software can be via OPC or 4-20mA.

If you want any more information (technical / pricing) on the system, please contact me on alano@jmcanty.com ■

Dear Sir,

One of our product lines is Gradex automated particle size analysers. A mechanical device which automatically determines the PSD of a sample. See our website for more information. Please send an email with detailed information and I will forward to the responsible person in our organisation. ■

we would like to measure particle size distribution of outlet dust of a stack. for example how much below 1 micron, how much between 1-10 micron and so on.

how we can do it?

is there any online measuring device?

how we can gather dust and send it to lab? how much it needed?

can we collect outlet gas of stack and send it to lab to measure dust content?

thanks ■