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Thread: Dustless Tranfers without Baghouses

  1. #1
    Join Date
    May 02
    Posts
    23

    Dustless Tranfers without Baghouses

    Gulf conveyors has patented a new dustless transfer chute which uses existing dynamics to eliminate dust at the transfer without using any external power. These chutes are very successful with coal after recent installation in the USA. Our first Alumina chute is due to be installed in Australia early Nov 2002.

    Let me know if more information is required.

    Regards
    Glenn Segers

  2. #2
    Jenny Baldo - M&J Engineering, RSA Guest

    Dustless Transfer Chute

    I have read your article with interest. Could you kindly send me a company profile and more info on your chute.
    Thanking you in anticipation

    Regards,
    Jenny

  3. #3
    Kashif Chaudhry Guest

    dustless transfers without baghouses

    We have serious dust handling problems at our site in khewra. We use limestone in the manufacturing of Soda Ash and the limestone contains dust anywhere upto 4%. I'm interested in knowing how can that chute be helpful in removing that dust. Our lime stone size is 2.5 inches to 5 inches and we use 850 tonnes of lime stone every day. Your help and time will be greatly apopreciated. Thanks.

    Best Regards
    kashif

  4. #4
    Lawrence K. Nordell

    Lawrence K. Nordell

    President and CEO

    Conveyor Dynamics Inc. [eDir]

    Conveyor Dynamics Inc.

    Professional Experience 57 Years / 11 Month Lawrence K. Nordell has 57 Years and 11 Month professional experience

    Discussions 2608 Lawrence K. Nordell acceded to 2608 discussions, Articles 0 Lawrence K. Nordell wrote 0 articles, Publications 0 Lawrence K. Nordell Nordell released 0 publications

    Searching nothing specified

    Know-How Design (1521) Lawrence K. Nordell used this tag 1521 times, Pipe Conveyor (238) Lawrence K. Nordell used this tag 238 times, Chutes (119) Lawrence K. Nordell used this tag 119 times

    Dust & Belt Transfer Design

    Modern transfer chute design can utilize granular flow mechanics that simulates the flow of solids in particle form and the gas field that surrounds the ore particles.

    Conveyor Dynamics, Inc. (CDI) has developed mathematical tools that can provide assessment of the gas turbulence and the airborne dust which can be generated based on the terminal velocity of all particle sizes when they exceed gravity's force. From this we can provide a retention time to decant the particle groups, dependent on the unsteady gas flow induced by particle motion, in all manner of chute designs.

    Chute design has stepped beyond an art form and parameter guesswork. We practice dust control by knowing where to inhibit gas turbulence and eliminate dust leakage. It is not obvious. The form of the chute surfaces and stilling regions, within the chute, are necessary to achieve the ultimate goal of a dust-less transfer. Without knowing the gas dynamics, you are guessing. The gas dynamics are dependent on the particle dynamics. The particle dynamics are dependent on: chute shape, particle size distribution and shapes, chute surface frictions, particle surface friction, surface moisture, and so on.

    We are happy to demostrate our methods. Compare our phyical modeling vs the meta-physical.

    Lawrence Nordell
    Conveyor Dynamics, Inc.
    1111 West Holly St.
    Bellingham, WA 98225
    USA
    website: www.conveyor-dynamics.com

  5. #5

    Re: Dustless Tranfers without Baghouses

    I am pretty much interested in your Dustless Transfers chutes.
    I am currently working in the industry where the dust problems becomes quite an issue. We handle different kind of material (lime stone - 30-80mm, basalt - 60-150 mm, coke 120-250 mm).
    I would very much appreciate if you could send me some kind of brochure or catalogue of your chutes.

    Best regards,

    Janusz Tchorzewski
    ul. Kwiatowa 14
    66-131 Cigacice
    Poland
    janusz.tchorzewski@rockwool.com

  6. #6
    Lawrence Nordell

    We came to know that, you are supplying Dust less Chutes for Belt Conveyor Transfer Points. As we are in leaders of Indian Cement Industry, we hope your product is very useful to us. So, let we have your broucher / catalogue and product details for our records and consideration in various up-coming projects.

    Early response in this regards is highly appreciated.

    Regards
    _____________________

    Regards,
    Harihar Dora
    ACC Limited
    Project Engineering & Implementation Group
    ACC Thane Complex, L. B. S. Marg,
    Thane 400 604, INDIA
    Phone: +91-22-25818038
    Fax : +91-22-25824395
    Email : harihar.dora@acclimited.com
    www.acclimited.com

  7. #7
    The logic of designing transfers that do not generate dust are described in detail in our book "The Transfer Chute Design Manual" in Chapter 9. (see www.conveyortransferdesign.com)

    We have designed and successfully designed chutes that are relatively dust free for nearly 10 years now. In the book we describe a successful installation in an alumina plant.

    Cheers

    Colin Benjamin
    Gulf Conveyor Systems P/L

    For more information, please visit:
    http://www.bulk-online.com/Forum/sho...threadid=21089

  8. #8
    Lawrence K. Nordell

    Lawrence K. Nordell

    President and CEO

    Conveyor Dynamics Inc. [eDir]

    Conveyor Dynamics Inc.

    Professional Experience 57 Years / 11 Month Lawrence K. Nordell has 57 Years and 11 Month professional experience

    Discussions 2608 Lawrence K. Nordell acceded to 2608 discussions, Articles 0 Lawrence K. Nordell wrote 0 articles, Publications 0 Lawrence K. Nordell Nordell released 0 publications

    Searching nothing specified

    Know-How Design (1521) Lawrence K. Nordell used this tag 1521 times, Pipe Conveyor (238) Lawrence K. Nordell used this tag 238 times, Chutes (119) Lawrence K. Nordell used this tag 119 times

    Dustless Transfer Chute -- Patents & Cat Fights

    Here is an interesting read about some reputed experts fighting over the right to claim "Dustless Transfer"

    Judgement in a USA court case removed a number of claims. See:

    http://www.717madisonplace.com/wp-co...010/02/ccc.pdf

    My posting this also poses a question of Patent Claims: even though the Patent is granted, it can be taken away.
    Lawrence Nordell
    Conveyor Dynamics, Inc.

    website, email & phone contacts:
    www.conveyor-dynamics.com
    nordell@conveyor-dynamics.com
    phone: USA 360-671-2200
    fax: USA 360-671-8450

  9. #9
    Lawrence K. Nordell

    Lawrence K. Nordell

    President and CEO

    Conveyor Dynamics Inc. [eDir]

    Conveyor Dynamics Inc.

    Professional Experience 57 Years / 11 Month Lawrence K. Nordell has 57 Years and 11 Month professional experience

    Discussions 2608 Lawrence K. Nordell acceded to 2608 discussions, Articles 0 Lawrence K. Nordell wrote 0 articles, Publications 0 Lawrence K. Nordell Nordell released 0 publications

    Searching nothing specified

    Know-How Design (1521) Lawrence K. Nordell used this tag 1521 times, Pipe Conveyor (238) Lawrence K. Nordell used this tag 238 times, Chutes (119) Lawrence K. Nordell used this tag 119 times

    Dustless transfer -- rock & gas dynamics

    In order to evaluate the level of dust emission measure in a ore transfer chute you must understand the gas, the rock flow and the geometry elements of the chute that controls solids and gas flows.

    Many claim to have insight into ore and gas behavior. The proof is in understanding and predicting the flow based on known physics. Tests are conducted to quantify the rock and gas behavior. Some professionals resort to video imaging the rock flow and dust flow analysis by known and accepted particle size distribution, dust volume, and mass captured in the gas flow field.

    I offer a set of images depicting rock flow and gas dynamics induced by rock flow. The gas velocity and regions of liberation of the dust in the rock flow associated with the gas velocity can then be determined.

    Such as model can predict the gas volume and velocity leaving the exit points within the chute volume. Based on the gas velocity, known formulae predict the lifting of small dust particles and suspending them in the gas stream with sufficient time for the dust to be expelled from within the chute.

    Without having reasonably accurate knowledge of the gas field, one cannot predict the behavior of dust emissions with accuracy unless experiments are conducted.

    We believe these images are first time 3-D rock shaped granular stream, with induced gas flow, has been achieved. We wish to see if others have achieved the same.
    Attached Files Attached Files
    Lawrence Nordell
    Conveyor Dynamics, Inc.

    website, email & phone contacts:
    www.conveyor-dynamics.com
    nordell@conveyor-dynamics.com
    phone: USA 360-671-2200
    fax: USA 360-671-8450

  10. #10
    Lawrence K. Nordell

    Lawrence K. Nordell

    President and CEO

    Conveyor Dynamics Inc. [eDir]

    Conveyor Dynamics Inc.

    Professional Experience 57 Years / 11 Month Lawrence K. Nordell has 57 Years and 11 Month professional experience

    Discussions 2608 Lawrence K. Nordell acceded to 2608 discussions, Articles 0 Lawrence K. Nordell wrote 0 articles, Publications 0 Lawrence K. Nordell Nordell released 0 publications

    Searching nothing specified

    Know-How Design (1521) Lawrence K. Nordell used this tag 1521 times, Pipe Conveyor (238) Lawrence K. Nordell used this tag 238 times, Chutes (119) Lawrence K. Nordell used this tag 119 times

    Lack of Cement Dust Control by Example

    I offer a typical problem facing the cement industry. How to identify and correct existing chute with improper dust control.

    It is one thing to tell a client you can it. It another to tell that you can do it with all the physics to show the before and after results. Then back up the claim with guarantees and field measurements.

    Photo:
    Cement Plant Clinker Dust Liberation – Belt moves right to left
    Notice Dual Pneumatic Dust Collectors – Not too Efficient – Note: forward stilling chamber

    Conveyor Dynamics, Inc. (CDI) is providing a new chute system that will eliminate this problem. Our rock and gas model can predict the size and quantity of dust liberation. It can also predict the damage to chute liners, belt wear, belt tracking and belt loading configuration for maximum belt capacity. Note: we include the present dust collection negative pressures in our model to identify present extraction efficiency.

    Why is it leaking, where is it leaking, and how much is leaking can all be answered with the new modeling techniques.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Nordell_Transfer.jpg 
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Size:	245.3 KB 
ID:	23125  
    Lawrence Nordell
    Conveyor Dynamics, Inc.

    website, email & phone contacts:
    www.conveyor-dynamics.com
    nordell@conveyor-dynamics.com
    phone: USA 360-671-2200
    fax: USA 360-671-8450

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