Blinding of screen mesh

Posted in: , on 7. Jun. 2004 - 12:45

Dear sir,

we are facing a problem with a vibrating screen in one of our sites. It is a double deck screen for handling rock phosphate and the bottom mesh is blindling of frequently in turn fines carrying over with the product. Please advice me to solve this problem. Bottom mesh size is 2.4 mm sq, opening.

Thanking you,

sudhakar.

Re: Blinding Of Screen Mesh

Posted on 8. Jun. 2004 - 05:41

Dear Shri Sudhakar,

I suggest you to put following information, which will help the respondents to give some suggestions :

1) Size of feed material with size distribution percentage.

2) Moisture content in material.

3) Whether blinding all the time in a year or only during rainy season.

4) Passing size for upper deck

5) Screen vibration amplitude and frequency (this you may get from supplier’s specification).

6) Capacity (feeding rate) to the upper deck, mtph.

Regards,

Ishwar G Mulani.

Author of Book : Engineering Science and Application Design for Belt Conveyors.

Advisor / Consultant for Bulk Material Handling System & Issues.

Email : parimul@pn2.vsnl.net.in

Tel.: 0091 (0)20 25882916

Re: Blinding Of Screen Mesh

Posted on 9. Jun. 2004 - 03:23

There are several anti-blinding devices available on the market for deck screeners. Look for ultrasonic devices as well as traditional ball decks on the problem deck.

Walker Robbins Jim Robbins and Associates, Inc. Smart Solutions for Bulk Soilds and Air Pollution Control
Peyfuss
(not verified)

Re: Blinding Of Screen Mesh

Posted on 13. Jun. 2004 - 11:48

Dear Sirs!

There are a lot of measures can be taken to avoid blinding. But in your case your need to be sure to work reliable in all (dry/wet) seasons. This may be matched by the use of a flip-flop screen. Also we can inform you about special screen cloth design, in case of too much cost of a new machine. Pls. mind that our flip-flop machines are license-manufactured in India!

Best Regards

B.Peyfuss

office@peytec.at

www.peytec.at

Russell Finex..
(not verified)

Mesh Blinding

Posted on 14. Jun. 2004 - 11:39

An ultrasonic deblinding system will help you to overcome these problems.

Russell Finex have been manufacturing ultrasonic deblinding systems for over 25 years.

Please visit our website at www.russellfinex.com or contact us on info@russellfinex.com and we will be happy to help you.

sejoong kim
(not verified)

Untitled

Posted on 15. Jun. 2004 - 07:02

I am pleased to advise you my experance concerning blinding solution of phosphate rock. I think Bottom mesh size is 2.4 mm sq, opening is no problem. We have solved the blinding problem of 1.4mm sq. opening with FLEX-MAT, we changed only current slot woven wire to FLEX-MAT manufactured by Major wire industries ltd in Canada.

Please refer attached photo (sus slot opening1.4*8mm blineded. flex-mat 1.3mm no blinded)

If you have any question, please feel free to contact me soon.



Thank you,

Sejoong Kim

Russell Finex..
(not verified)

Ultrasonic Deblinding

Posted on 15. Jun. 2004 - 10:15

Dear sejoong kim,

If you would like to send details of your mesh blinding issues to enquiries@russellfinex.com one of our expert engineers can reply to your e-mail and help you to solve your problem.

Kind Regards.

Re: Blinding Of Screen Mesh

Posted on 18. Jun. 2004 - 09:29

Dear Sir,

you can easily to solve the blinding problem with "elastic" polyurethane screen mesh with rectangular holes.

Moreover you must to adapte the vibrating amplitude and frequency.

With this vibration modification and with the use of special "elastic" screen mesh you can to screen material with mistake until the 7 %

If you need additional information not hesitate to contact me.

A. MARIO

Eurogomma

a.mario@eurogomma.com

Blinding Problem

Posted on 20. Jun. 2004 - 12:26

I agree with the flexmat answer.......if the product is crushed product.

Basically, many many users with this problem in CANADA have completely solved their blinding problem with the FLEXMAT self cleaning woven wire cloth. THEY WILL PROVE IT, no prob.

Here, you must try and then confirm success or fail.

What type or make of screener, what speed or rpm running, what stroke or amplitude of eccentricity are you actually operating at, and most importantly, what degree or angle of installation.

How many TPH, metric or imperial are you trying to process.

Is bed depth too deep? I suspect...YES

What is sieve analysis of feed to top deck

I await you reply..............Hoping to help as usual.

George Baker,,,,,,MODERATOR

Best Regards, George Baker Regional Sales Manager - Canada TELSMITH Inc Mequon, WI 1-519-242-6664 Cell E: (work) [email]gbaker@telsmith.com[/email] E: (home) [email] gggman353@gmail.com[/email] website: [url]www.telsmith.com[/url] Manufacturer of portable, modular and stationary mineral processing equipment for the aggregate and mining industries.

Blinding Screen Mesh

Posted on 21. Jun. 2004 - 08:51

Hello George,

For my experience the here the screening data you request:

apertures: 2,4x6 mm

RPM: 1200

amplit.: 3,5/6 mm.

TPH: 8 ton/mq./h 8 (dry process); 27 ton/mq/h (wet process)

inclination: 10-13°

The grain distribution (crushed) is:

0 to 5,5 mm.

0-1,5 mm. 25%

1,5-2,5 mm. 40%

2,5-5,5 mm. 35%

Please note that I am referring to the special "superelastic" polyurethane (Eurogomma formula) screen mesh water jet holed.

Moreover the p.u mesh duration is 7-12 times more than the wire self cleaning mesh.

Regards

A. MARIO

Need Digital Please

Posted on 22. Jun. 2004 - 02:24

Hello A. Mario: Thanks for the info....appreciated.

At first glance........the thing that JUMPS OUT TO ME ....is the low angle on incline (too low) I would think this would make the bed depth too deep and cause fines carried over into the OVERS.

TYPICALLY, finer screening requires two things.....steeper angle and faster RPM.

FOR BLINDING: more aggressive action if possible would benefit clearing the apertures....if more RPM is allowable by the manufacturer.

1200 RPM is not overly fast for this separation.

THE POLY media is quite interesting. A digital pic on this and a side angle of the machine would be very helpful. I can do it all by words or math but, a digital pic would really help clear up faster.

Are the poly panels......sold poly segments say 2'x2' or 2'x4' or some other dimensional configuration?

I would say you are blinding more when attempting to screen wet crushed and somewhat better screening on dry crushed screening.

FOR NOW, could you EMAIL me at bael@golden.net some digital pics of this screener and I will answer back here in the FORUM.

APPRECIATED.

GEORGE..........ciao

Best Regards, George Baker Regional Sales Manager - Canada TELSMITH Inc Mequon, WI 1-519-242-6664 Cell E: (work) [email]gbaker@telsmith.com[/email] E: (home) [email] gggman353@gmail.com[/email] website: [url]www.telsmith.com[/url] Manufacturer of portable, modular and stationary mineral processing equipment for the aggregate and mining industries.

Thanks Mario.......

Posted on 15. Jul. 2004 - 02:47

I appreciate your knowledgeable imput. George.....

Best Regards, George Baker Regional Sales Manager - Canada TELSMITH Inc Mequon, WI 1-519-242-6664 Cell E: (work) [email]gbaker@telsmith.com[/email] E: (home) [email] gggman353@gmail.com[/email] website: [url]www.telsmith.com[/url] Manufacturer of portable, modular and stationary mineral processing equipment for the aggregate and mining industries.