Re: Vibrating Screen Problem
Umar
I understand you have one vibrator of eletromagnetic or electromechanical type - so you have a circular motion screen if yes you are probably running it against the flow. Either you can reverse the flow or incline the screen.
Ziggy ■
Speed Stroke Slope Chart Attached
Hello Umar: Ummmmmmm.....you have a problem for sure.
Setup is the problem......
>>> the speed is wrong
>>> the slope at 10 degree is too shallow for a 20 mesh cut
>>> the stroke must be checked with stroke check card
FOOT TRAVEL will be too slow allowing material to gang up and become too deep at only 10 degree
Material acting strange running in different directions is an indication that the unit is probably setup wrong and hence the material instead of running over the wirecloth in a non static load configuration is moving sporadically and not screening well because of this.
Look at chart attached for recommended speed stroke slope ideally suited for doing a 20 mesh cut.
Best Regards.............George Baker
Attachments
speed stroke slope pg3 incline screen chart (ZIP)
■
Vibrator Is Wrong Type
It just answered your post on cracked welds........and this rig is the same machine.
So, the unit is homemade. This is important aspect.
In my opinion, and with great respect, the vibrator type is wrong and this is indicated by the material travel modes you described already.
The material swirls and the feed end, moves upward towards feed end in the middle......I have seen this condition on gold slurry machines....kinda weird. That was on circle throw screener box with the drive mounted up above.....not through the body. This changes the movement on the deck.
The correct setup........is indicated by the speed stroke slope chart i have attached here......look at the column for screening at 20 mesh cut.........and you will confirm the FIX.
Respectfully, George Baker www.assinck.com
Attachments
speed stroke slope pg3 incline screen chart (ZIP)
■
Re: Vibrating Screen Problem
Possibly the linear motion would be better for this type of application but that would be more efficiency related - circular motion mechanism should also do the job and material shall flow without big trouble - another option the screen is running at resonance - George mentioned something about cracked welds - that would be picked up though with test card or frequency analysis(impact test).
Ziggy ■
Vibrating screen problem
We have made a vibrating screen for seiving dolomite powder. our requirement is minus 20 mesh at three ton per hour.
the screen is simple and inclined at 10 degree. (8feet *3 feet).electro mechanical vibrator 1.5 kw is fixed under the screen table centre.the seived material is dropped into the base.There is no hopper but an angled mild steel base.
the problem is that material sticks to the surface of the base after seive and has slugish movement. some material wirls at fixed point and doesnot move down.
At some points in the middle material travels upward.
kindly help us in solving the problem.
should we change the vibrator
fix a hopper underneath.
or change the slope.
regards
umar ■