hood and spoon inertial flow belt conveyor transfer systems

Hood and Spoon Inertial Flow Belt Conveyor Transfer Systems

Robert ClarkeProfessional in TrainingMechanical EngineeringGreenside Colliery – Anglo Coal

22 August 2008

Presentation Outline

• Background• What is a Transfer Chute• Problems Associated with Belt Transfers• The Hood and Spoon Design Philosophy• Computational Design Techniques• The Design Process• Conclusion

Background

• Greenside Colliery U/G – Trunk Conveyors

A

B

C

G

H

F

F1

NW1

NW3

N1

NW2

Background

• Opportunities for Improvements– Downtime– Maintenance– Labour Expense– Reduced Fines Generation– Dust Control Downtime

42%

Maintenance34%

Labour9%

Fines15%

Background

The Hood and Spoon Transfer ChuteThe Hood and Spoon Transfer Chute

3.6m

2m

1m

0.6m

X

Y

Background

• What is a Transfer Point?

Background

• What is a Transfer Point?

Ineffective Transfer Problems

• Blockage/ Plugging

• Spillage

• Damage to Belt and Idlers

Ineffective Transfer Problems

• Dust and Degradation

1. Load Material at Uniform Rate in Coherent Stream

2. Centre loading in Direction of Travel

3. Load at the Speed of the Receiving Belt

4. Load with Minimal Impact

The Hood and Spoon Design Philosophy

The Hood and Spoon Design Philosophy

• Centre Loading

• No Tracking Problems

The Hood and Spoon Design Philosophy

• Low Impact loading

• Dust Control

The Hood and Spoon Design

• Hood– In the Trajectory

Path– Material Leaves with

Vertical Velocity• Spoon

– Loading Surface– In Direction of

Receiving Belt

The Hood and Spoon Design

High Impact and Low Velocity are Avoided

The Hood and Spoon Design

High Impact and Low Velocity are Avoided

Coherent Constant Speed Loading

Prevention of Spillage, Wear and Degradation

The Hood and Spoon Design

• Spoon Carries Material Build Up• Static Friction Condition is Satisfied• Spoon Empties Under Overload Condition

Design Techniques

• Discrete Element Modeling (D.E.M.)– Used to Solve Discontinuous

Engineering Problems– Eg. Flow of Bulk Solids– D.E.M. Models Dynamic Motion &

Mechanical Interactions– Describes Velocity, Position & Force– Single Bodies Communicate Through

Boundary Forces

D.E.M.

The Design Process

• Step 1 – CAD Drawing

The Design Process

• Step 2 – Simulate initial Concept

The Design Process

• Step 3 – Modify The Design

The Design Process

• Step 4 – Final Simulation

The Design Process

• Step 5 – Design the Settling Zone

The Design Process

• Step 6 – Final Concept

Conclusion

• We Need: – Production– Energy Consumption

• So We Use :– VSD– High Belt Speed

• Therefore We Must:– Implement Modern Design Techniques– & Innovative Concepts

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