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Thread: Wire Diameter on Screen Cloth

  1. #1
    Krusher Guest

    Wire Diameter

    I have always tried to use the smallest diameter wire on screen cloth as I felt was practical. One would think, however, that there is a limit. Has any research been done, or must I just go on my experience in a particular application? Needless to say my concern is tons/$.

  2. #2
    George Baker

    George Baker

    Vice President- Corporate Communications

    Assinck Ltd. [eDir]

    Assinck Ltd.

    Professional Experience 39 Years / 9 Month George Baker has 39 Years and 9 Month professional experience

    Discussions 883 George Baker acceded to 883 discussions, Articles 0 George Baker wrote 0 articles, Publications 0 George Baker Baker released 0 publications

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    Know-How Screening (373) George Baker used this tag 373 times, Manufacturer (110) George Baker used this tag 110 times, Conveying (28) George Baker used this tag 28 times

    Wire Diameter

    Your analogy is correct.......to a point. If you are trying to obtain more throughput.......using a smaller diameter wire with the same clear opening in the wirecloth WILL increase open area. This must be balanced with the "life" of the screen or strength of the screen. We must balance wire diameter with life to obtain the throughput desired and the lowest operating cost per ton. You could put a mega heavy wire and the screen section would last forever......but, you would not screen must through it.

    There is an actual pick or standard wire size diameter for certain size clear openings or mesh. The smaller you get in the opening the more tight the picks are or limited. The smaller or finer the diameter also typically dictates the type of wire used.....for example...abrasive resistant steel, vs Type 304 Stainless steel or T316 stainless steel or monel or other wear resistant materials.

    If you tell me the spec, type of material being handled - I can give you a "standard wire cloth manufacturer's pick"

    Thankyou for your question..... George Baker

  3. #3
    ARUN CHAUDHRY Guest

    Re: Wire Diameter

    Originally posted by George Baker
    Your analogy is correct.......to a point. If you are trying to obtain more throughput.......using a smaller diameter wire with the same clear opening in the wirecloth WILL increase open area. This must be balanced with the "life" of the screen or strength of the screen. We must balance wire diameter with life to obtain the throughput desired and the lowest operating cost per ton. You could put a mega heavy wire and the screen section would last forever......but, you would not screen must through it.

    There is an actual pick or standard wire size diameter for certain size clear openings or mesh. The smaller you get in the opening the more tight the picks are or limited. The smaller or finer the diameter also typically dictates the type of wire used.....for example...abrasive resistant steel, vs Type 304 Stainless steel or T316 stainless steel or monel or other wear resistant materials.

    If you tell me the spec, type of material being handled - I can give you a "standard wire cloth manufacturer's pick"

    Thankyou for your question..... George Baker
    Dear Mr. George Baker,
    We are very much interested to understand the size and type of material required for wire mesh being used for pre-ground clinker. The life of the screen at present is low(~3months). We are using these screens for -3mm cut off which is 80%. Basically we are looking for the better life of the screen say one year or more. Please let us know if any such application is on. We may provide particle size distribution if so required.
    Regards
    Arun

  4. #4
    George Baker

    George Baker

    Vice President- Corporate Communications

    Assinck Ltd. [eDir]

    Assinck Ltd.

    Professional Experience 39 Years / 9 Month George Baker has 39 Years and 9 Month professional experience

    Discussions 883 George Baker acceded to 883 discussions, Articles 0 George Baker wrote 0 articles, Publications 0 George Baker Baker released 0 publications

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    Extended Life of Wirecloth to a year....

    Dear Arun: Thankyou for your reply. Here is the deal: At 3mm opening you must be using very fine wire diameter. What I require to improve your situtation is this:

    1. The full wirecloth specifications: size of section, end tensioned or side hooked? square mesh or slotted, type of wire being ordered, cambered deck on the vibrating screen or not, supplier of cloth......(this only for the need to ensure good quality woven wirecloth vs a "sleazy weave")

    2. Please provide full description of the actual vibrating machine:
    TYPE, MAKE, MODEL including bearing size, angle of installation, wet or dry screening, feed to screen sieve analysis, SPEED, STROKE, SLOPE ANGLE of the vibrating screen.

    3. FEED to the screen: Is is evenly distributed across full width of the vibrating screen? A digital would be super to analyse.
    If feed is not fully spread across the width of the screen, especially at 3mm opg........you create a MINI SURGE to the fine opening and it abuses the fine mesh, make the bed depth too deep on the wirecloth, stretches the cloth and tears the cloth vs wearing it out. But, mainly it causes fines in the overs or INEFFICIENCY. Not usually a good thing.

    4. Backing cloth may be indicated to "support your fine 3 mm cloth" Are you ripping or wearing the screen cloth out? KEY QUESTION. ripping = ABUSE wearing out thin = ACCEPTABLE

    5. Screen TENSION and maintaining screen tension or what we call DRUM HEAD TIGHT TENSION is very critical to increasing wirecloth life. IF loose.......it breaks like a hair pin which is bent back and forth two or three times and snaps.

    6. Is the WIRECLOTH mesh staying in the METAL REINFORCED HOOKED EDGE or is it pulling out.....

    7. WHAT TONS PER HOURS TO WHAT SIZE OF SCREEN and what is the weight per cubic foot of the material please. CRITICAL

    8. A change to a 3mm urethane if properly specified would probably increase your life span by 4-5 times if not more. But, we must get the BASE DATA first and see if there is not something inherently wrong with the normal setup.

    Sorry for the long answer..........but, we must TROUBLESHOOT the operation to properly recommend an acceptable answer.

    Sincerely, GEORGE BAKER CANADA

  5. #5
    ARUN CHAUDHRY Guest
    Dear George,
    Thanks for your sincere reply.

    We are one of the largest cement producers in India. The detailed information which you have asked for the Vibrating Screen is being forwarded to our supplier.
    Meanwhile, we are sending you the available details with us as follows:
    a. Make- Mogensen
    b. Type- SL2046 with 2no. Exciters
    c. Capacity- 175TPH
    d. Feed Material- Pre-ground Clinker
    e. Mat. Bulk Density- 1.6~2..3t/cum
    f. Particle size distribution:
    +10mm-3.7% : 5mm-8.7% : 2.5mm-12% : 1.2mm-10.8% :
    0.6mm-3.8% : 0.3mm-14.1% : 0.15mm-8.0% : -0.15mm-38.9%
    g. Oversize Return- 40TPH
    Undersize Return- 120TPH
    Please note that this is one the smallest capacity size we are using. Other are of higher sizes e.g. 300TPH.
    Also we have to use mech. vibro feeder for gradual flow of feed material.

    With the above available information can you please guide us for the type or make of screen which has the working life of at least one yr. or more.

    Best Regards
    Arun

  6. #6
    George Baker

    George Baker

    Vice President- Corporate Communications

    Assinck Ltd. [eDir]

    Assinck Ltd.

    Professional Experience 39 Years / 9 Month George Baker has 39 Years and 9 Month professional experience

    Discussions 883 George Baker acceded to 883 discussions, Articles 0 George Baker wrote 0 articles, Publications 0 George Baker Baker released 0 publications

    Searching nothing specified

    Know-How Screening (373) George Baker used this tag 373 times, Manufacturer (110) George Baker used this tag 110 times, Conveying (28) George Baker used this tag 28 times

    Still need more info - sorry about that.

    I need :

    - the size, width and length of the MOGENSEN SIZER

    - the actual tached speed RPM of the MOGENSEN screener body

    - I need the actual SLOPE of the decks - very critical

    If the decks are too steep.......the material FPM foot per minute travel rate is too quick and good separation does not happen

    If the speed or RPM of the screener body is too fast......same thing happens

    - Are the separate decks on the MOGENSEN SIZER at different angles also?

    George Baker........ Please be patient, we need the information before we put some different media on the screen.

  7. #7
    ARUN CHAUDHRY Guest

    Vibrating Screen

    Dear George,

    Sorry for the delay in reply as network was down at our end.

    Please note the following:

    1. Size, width, Length

    a. Mogensen Model Size: 2.0m x 2.4m
    b. Width of screen: 2m
    c. Length of screen: 2.44m

    2. Speed: 1000rpm

    3. Slope of decks:

    I -6deg
    II - 8deg
    III-10deg
    IV -12deg

    I hope the above information shall serve the purpose.

    Thanks and regards

    Arun Chaudhry

  8. #8
    George Baker

    George Baker

    Vice President- Corporate Communications

    Assinck Ltd. [eDir]

    Assinck Ltd.

    Professional Experience 39 Years / 9 Month George Baker has 39 Years and 9 Month professional experience

    Discussions 883 George Baker acceded to 883 discussions, Articles 0 George Baker wrote 0 articles, Publications 0 George Baker Baker released 0 publications

    Searching nothing specified

    Know-How Screening (373) George Baker used this tag 373 times, Manufacturer (110) George Baker used this tag 110 times, Conveying (28) George Baker used this tag 28 times

    Thanks for the vibrating screen size

    Arun: Thankyou for the screen machine specs. Perfect,
    I am getting closer to an answer.

    1. Please advise:

    a) Wirecloth specs on each deck. Opening or mesh size,
    wire diameter and type of steel. A/R or Stainless

    b) Which deck is the 3mm opening on - I assume bottom

    c) 1000 rpm seems too slow for this opening. Should
    be more like 1200 - 1400 on that size of opening.

    Thankyou for your patience.

  9. #9
    ARUN CHAUDHRY Guest

    Vibrating Screen

    Dear Mr. George Baker,

    Our reply is as under:

    a.

    For 3m wide sizer(300tph)- Model SL 3048

    (deck x opening sqmm x wire dia. mm)
    (1 x 17 x 5)/ (2 x 11 x 4.8)/ (3 x 5.82 x 3.4)

    For 2m wide sizer(200tph)- Model SL 2046/ SL 2066

    (1 x 17 x 5)/ (2 x 13/14 x 2.5)/ (3 x 8/9 x 1.6/1.8)/(4 x 5/5.5 x1.2*)

    * Now changed to 1.8 or 2.95mm

    b. Type of steel - Spring steel

    c. As you assumed, 3mm cut off is at the bottom deck only.

    d. Can you please suggest me alternate source also who can supply similar m/c but with better life of the screen.

    Thanks and Regards

  10. #10
    rekhawar Guest

    Arrow

    Dear Mr. Baker,

    This discussion was quite relavant to the problem, I am working on now.

    What happened after Mr. Arun's feedback?

    Can you please continue the discussion?


    Regards

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