Mesh Blinding And Blockage
Not a direct answer but one simple way of identifying the effect of plugging is by monitoring the oversize coming off of the mesh (assuming you have a oversize discharge on your screener). As the percentage of on-size or good product increases within the rejected material, this will indicate that the screen is becoming blocked and therefore will give you an indicatation that the mesh screen requires replacement/cleaning.
Alternatively, you could look into trying to eliminate the plugging by installing a deblinding system such as the Russell Vibrasonic Deblinding System (www.russellfinex.com/vds.html). In summary, this system transmits ultrasonic waves through the mesh, preventing the mesh from becoming blocked with product that has either agglomerated or pegged/plugged. Once installed you should see a significant increase in both throughput (which you could use as your measurement) and also mesh life since this will reduce the amount of mechanical cleaning of the screen. ■
Re: Woven Wire Cloth - Plugging Measurement
Originally Posted by dauna47
Thank you, best regards.
Dear Mr.Dauna47,
If there is no process disturbances or financial loss because of the jamming of screen, why should you worry?
Regards, ■
Here Is The Answer/ Not Complex
YOU look at the wirecloth in question. Estimate the percent of PLUGGED openings....and there is your simple answer and the correct answer. 50% plugged....you have a big problem with carry over of fines that should be passing.
Typically, this would point to a number of possible problems:
1. your wire diameter is TOO BIG...drop it down a few sizes...and it will make a SHARPER CUT....AND give you the added benefit of more open area...equating to more TPH thrus.
2. Type of alloy you are using could very possibly be INCORRECT. if using plain steel, may have to go to AR abrasiver resistant steel or to T304 stainless ...smoother, less likely to PIT then hold the material on the wire and make the CLOTH PRONE TO PLUGGING.
3. may have to use a non plugging or what we call a SELF RELIEVING OR SELF CLEANING wirecloth...ie MAJOR WIRE FLEXMAT AND or WS TYLER GATOR WIRE...both absolutely SUPERB for this problem.
4. you are plugging.....so in fact, you WIRECLOTH may in fact be NOT DRUM HEAD TIGHT...if not TENSIONED TIGHTLY...AND CORRECTLY...the wirecloth will PLUG.
5. MUST BE DRUM HEAD TIGHT....WELL STRETCHED or you will PLUG.
lots of other possibilities....but, this are what I would check first.
HAPPY SCREENING !!!!
George Baker - MODERATOR of this FORUM... ■
An Fyi.....
Good site on how to measure woven wire mesh right here:
http://www.bwire.com/measurewirecloth.htm
Take a look and you will learn a few things. ■
Is The Material Cubical Going To The Screen?
i assume it is coming from a crusher of some kind? do you have nice cubical material or elongates ...little arrowheads in it?
little arrowheads tend to plug....get the crusher to crush it with less elongates in it......and problem goes away... ■
Did We Ever Get This Problem Fixed Or No?
could you please update our forum members........thanks.... ■
Woven Wire Cloth - Plugging Measurement
I'm interested to know if it exists a measurement device or a method to calculate the screen surface area plugged with material? In fact, I'm interested to calculate the plugging effect in function of time for the 20M screening cloth. I want to check if nearsize material is jammed in hole openings after a longer period of time. The material is cubical, dry, free flowing; a gyratory screener is used for this application (a screener cover doesn't permit to see the material on the screen). When we remove the screen for a replacement, we can see the jammed openings but we don't know how to quantify or measure this operating trouble!
Thank you, best regards. ■