Conveyors Conference, 23-24 Sept 2014, BrisbanePeter Wypych, Bulk Materials Engineering Australia

1

Peter Wypychwypych@uow.edu.au

Belt Conveying Technology:New Developments, Design and

Operating Considerations

Conveyors Conference23 – 24 September 2014, Stamford Hotel, Brisbane

Surcharge Angle – Alumina ??

© Wypych, 2014

Conveyors Conference, 23-24 Sept 2014, BrisbanePeter Wypych, Bulk Materials Engineering Australia

2

Inclined Conveying

© Wypych, 2014

Case Study – AluminaBMEA requested to investigate critical

conveyor inclinations for alumina (20-100°C)

= 15° – 20° over 300 m (vertical feed)

Four (4) stages:1. Literature review

2. Flow properties: Angle of Repose (poured); Bulk density

IYL (explore effect of elevated temperature on );

WYL (Grade M belt, smooth and cleated Aerobelt)

3. Inclination (slippage) tests (same wall materials)

4. Critical conveyor inclination tests (modular conveyor that can be tilted at different angles)

© Wypych, 2014

Conveyors Conference, 23-24 Sept 2014, BrisbanePeter Wypych, Bulk Materials Engineering Australia

3

Maximum Incline Angle (max)(standard belt conveyor)

1. CEMA 6th Edition (2005):

; ; lump size; particle shape

Cleating: max can be increased by 5 deg

Considers inclined conveying only Table

2. Golka (2007):

Equation: g; a (material acceleration at loading point); wall friction between material and belt

Considers inclined conveying and inclined feeding points Table

© Wypych, 2014

CEMA 6th Edition, 2005

© Wypych, 2014

Conveyors Conference, 23-24 Sept 2014, BrisbanePeter Wypych, Bulk Materials Engineering Australia

4

Golka, 2007

max 12 Simplistic (e.g. no temp effects) Appears conservative

Summary:

© Wypych, 2014

© Wypych, 2014

Conveyors Conference, 23-24 Sept 2014, BrisbanePeter Wypych, Bulk Materials Engineering Australia

5

© Wypych, 2014

© Wypych, 2014

Conveyors Conference, 23-24 Sept 2014, BrisbanePeter Wypych, Bulk Materials Engineering Australia

6

Video 1

Video 2

Video 3

Belt Conveying Experiments

© Wypych, 2014

Not available in literature!!

25% Increase in Capacity!!

© Wypych, 2014

Conveyors Conference, 23-24 Sept 2014, BrisbanePeter Wypych, Bulk Materials Engineering Australia

7

Micro-Ledge Chute – Blockage Problems

DEM Prediction of Chute Blockages

Micro-Ledge Chute – Copper Ore© Wypych, 2014

Conveyors Conference, 23-24 Sept 2014, BrisbanePeter Wypych, Bulk Materials Engineering Australia

8

DEM Design of Low-Profile CT(spillage)

© Wypych, 2014

Dust “Lift-Off” Characteristics

Conveyors Conference, 23-24 Sept 2014, BrisbanePeter Wypych, Bulk Materials Engineering Australia

9

Dust “Lift-Off” of Coarse Magnetite

Video1 Video2

Dust “Lift-Off” of Concentrate

Optimal Belt Speed to Minimise

Dust Lift-Off

Case Study – Example of Design Model

Conveyors Conference, 23-24 Sept 2014, BrisbanePeter Wypych, Bulk Materials Engineering Australia

10

Case Study: UFO’s at Gold Mine

© Wypych, 2014

DEM Video 1

“UFOs”

DEM Video 2

© Wypych, 2014