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Manipulating the nature of slurry flows - FloCEPflocep.com/pdf/Slurry Conf - Algie slides final...

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Manipulating the nature of slurry flows to overcome production and maintenance challenges DR STEVE ALGIE CONSULTANT, FLOCEP PTY LTD 1
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Page 1: Manipulating the nature of slurry flows - FloCEPflocep.com/pdf/Slurry Conf - Algie slides final 2014.pdf · • segregation of the solids within slurry flows 2. ... • Flow rate

Manipulating the nature of slurry flowsto overcome production and maintenance challenges

DR  STEVE  ALGIE

CONSULTANT,  FLOCEP  PTY  LTD

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Page 2: Manipulating the nature of slurry flows - FloCEPflocep.com/pdf/Slurry Conf - Algie slides final 2014.pdf · • segregation of the solids within slurry flows 2. ... • Flow rate

What is PROmotion™ Technology?

PROmotion Technology is the basis for:

• a family of devices that

• solve problems arising from the inherent tendency for

• segregation of the solids within slurry flows

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Page 3: Manipulating the nature of slurry flows - FloCEPflocep.com/pdf/Slurry Conf - Algie slides final 2014.pdf · • segregation of the solids within slurry flows 2. ... • Flow rate

Engineering models (usefully) simplify reality

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Page 4: Manipulating the nature of slurry flows - FloCEPflocep.com/pdf/Slurry Conf - Algie slides final 2014.pdf · • segregation of the solids within slurry flows 2. ... • Flow rate

Newitt’s slurry flow classification classification (single particle size) 

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Fully suspended

Suspended with moving bed

Suspended with saltation (particles ‘hop’ along pipe)

Blocked pipeLenticular 

deposits

Stationary deposits with ripplesIn

creasin

gvelocity

Increasing solids concentration

Page 5: Manipulating the nature of slurry flows - FloCEPflocep.com/pdf/Slurry Conf - Algie slides final 2014.pdf · • segregation of the solids within slurry flows 2. ... • Flow rate

FLOprep unit

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• Flow preparation upstream of hydrocyclone distributor 

• Solids loading ~60%; high abrasion index (47)

• FLOprep installed 2012• Projected life 188 weeks

• Flow rate changes have not affected performance

• Accepted and performance validated by client Evolution Mining ‐ Edna May Operations

Page 6: Manipulating the nature of slurry flows - FloCEPflocep.com/pdf/Slurry Conf - Algie slides final 2014.pdf · • segregation of the solids within slurry flows 2. ... • Flow rate

FLOdistributor

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Evolution Mining ‐ Edna May Operations

During installation in a scheduled 12‐hour shut‐down

In use

Page 7: Manipulating the nature of slurry flows - FloCEPflocep.com/pdf/Slurry Conf - Algie slides final 2014.pdf · • segregation of the solids within slurry flows 2. ... • Flow rate

FLOdistributor

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Evolution Mining ‐ Edna MayOperations

• Gold recovery increased from ~90 to ~94%

• Stable performance: optimal process operations

• Maintenance costs reduced 95%• uniform wear on cyclones

• Underflow densities uniform to 1% solids (74‐75%)• Adjustment intervals increased from 3 days to 4 months• Cyclone life cycle increased from 3 weeks to 16 weeks• Rubber‐lined spools not replaced in more than three years’ operation (previous ceramic spools had 16 week life)

Page 8: Manipulating the nature of slurry flows - FloCEPflocep.com/pdf/Slurry Conf - Algie slides final 2014.pdf · • segregation of the solids within slurry flows 2. ... • Flow rate

MAXbend®

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The situation:• Most severe location in the plant for bend wear 

• Superheated caustic slurry entering first flash tank

• Flashing inside bend results in very high erosion

• Standard bend life 120 days 

Alumina refinery in southwest WA

Page 9: Manipulating the nature of slurry flows - FloCEPflocep.com/pdf/Slurry Conf - Algie slides final 2014.pdf · • segregation of the solids within slurry flows 2. ... • Flow rate

MAXbend®

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• MAXbend installed 2012• service life to date ~900 days

• Projected life of the MAXbend: 1800 days (15 times multiplier)

• Flow rate increased by ~20% with no effect on MAXbend performance 

• Acceptance and validated performance by both clients• Rental option offered to clients and under consideration

Similarly spectacular results in SandfireResources’ DeGrussa copper‐gold operations

Page 10: Manipulating the nature of slurry flows - FloCEPflocep.com/pdf/Slurry Conf - Algie slides final 2014.pdf · • segregation of the solids within slurry flows 2. ... • Flow rate

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MAXbend® Performance Timeline

StandardBend Life MAXbend Bend Life

Note : Expected life based on inspection results from 1 year’s service (April 2013) and  2 year’s service (June 2014)

A PROmotion™ Technology

Page 11: Manipulating the nature of slurry flows - FloCEPflocep.com/pdf/Slurry Conf - Algie slides final 2014.pdf · • segregation of the solids within slurry flows 2. ... • Flow rate

Where might you use PROmotion™ Technology?PROmotion™ Technology pays off in places where the non‐homogeneous flow inside the pipe might get you into trouble:• Measurement, or sampling• Addition of a chemical• Splitting a slurry flow• Where there’s a bend in the pipe

Consider how much easier these operations would be if the slurry were actually homogeneous at these points!

Then …

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Page 12: Manipulating the nature of slurry flows - FloCEPflocep.com/pdf/Slurry Conf - Algie slides final 2014.pdf · • segregation of the solids within slurry flows 2. ... • Flow rate

Think of PROmotion Technology!Contacts:

www.flocep.com

[email protected]

Phone: +61 8 9353 3929

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