Product Portfolio

August 2009

INTRODUCTION

• The Company is an Australian registered company based in

Perth

•Access to and shares the IP of M C Process, a South African

Process Equipment company with a large installed base

• Owner Mark Craddock

• IP shared and free flowing

• Established design base

• Established in African industry

• Collectively, incl the M C Process team, we have over 200 years

experience in the industry doing exactly what we are doing.

OVERVIEW

•Solvent Extraction units

•Solvent Extraction plants

•Thickeners

•Flocculant plants

•Attrition scrubbers

SOLVENT EXTRACTION

Picture of SX units

First Uranium – Ezulwini Uranium Solvent Extraction plant, South Africa

WHAT IS SOLVENT EXTRACTION (SX)?

Recovery of a valuable metal

Use of immiscible Organic and Aqueous solutions

Range of distribution of the valuable metal between the two allows for a certain degree of separation.

Stripp

ed So

lvent

SCRUB

STRIP

EXTRACTSolvent

Solvent

Solvent

Solvent Equilibration

Aqueous

Aqueous

Aqueous

ExtractRaffinate

AqueousFeed

ScrubSolution

Strip Solution

Solv

ent

Feed

Scru

bb

ed S

olv

ent

ScrubRaffinate

Load

ed So

lvent

Strip Liquor

Figure 1: The Practical Process of Solvent Extraction, (“Solvent Extraction Principles and Applications to Process Metallurgy”, G.M Ritcey, 2006)

GENERAL SX CIRCUIT

OPERATING PROCEDURE

UP PUMPER

•Degree of Dispersion

•Rate of diffusion

MIXER

•Sufficient Contact Time

SETTLER

•Separation time

PACIFIC MINERALS PROCESSING’SSX UNIT

•Up-to date mechanical (incl. Fiberglass) knowledge of SX

plant manufacturing.

•Assist with erection and commissioning including plant

trouble shooting.

•HAZOP and design review.

•Cost effective modular installation.

•Experience in SX fire prevention and design.

•Assist in building a practical easy to operate plant.

HOW DOES PACIFIC MINERALS

PROCESSING ADD VALUE TO YOUR

PROJECT?

•Minimize CRUD formation.

•Minimize air entrainment.

DESIGN CONSIDERATIONS

•Designed to Reduced fire

risk – Minimal organic mist.

•Ensure O:A ration control

Profiled Organic Overflow Weir

DESIGN CONSIDERATIONS CONT.

• Effective mixing of aqueous

and organic phase.

• Adequate separation of

aqueous and organic phase.

• Less installed/absorbed

power for identical duty.

DESIGN CONSIDERATIONS CONT.

Ross Pot for pH Measurement

THICKENERS

• All machines have designs certified by a registered

professional engineer.

• Audit of our design by Anglo Coal 2008

• Over 30 machines installed in the last 24 months by M C

Process in Africa.

DESIGN CONSIDERATIONS

The primary driving force behind a thickener design is

the correct settling rate of the solid particulates.

The settling rate is affected by

- Nature of the particle

- Particle size and density

- Degree of flocculation and type of

flocculant

- Method of flocculation addition

- Method and accuracy of dilution of the

feed stream

- Inconsistent feed both in terms of

quantity and concentration

- Changes to the plant conditions such as

unplanned stoppages- Mechanical

strength

THICKENERS

• Two flocculant dosage points

• Centrifugal flow in the feed well

• Bed height determination

• Adjustable launder overflow

• Adjustable deflection plate

• Froth remover

• Adjustable dilution system

• Angled deflection plate

• Accurate underflow measurement

COUNTER CURRENT DECANTATION

• VSD driven pumper mixer unit –ensuring optimal mixing time• Unique tank design ensures no material hold up• Variability in terms of head and flow• Reduced power requirement

• Adjustable dilution• Centrifugal Feed well• Minimised pump requirements

Unique designed feed system to each thickener:

FLOCCULANT PLANTS

Type of flocculant

Flocculant dosage rate

Tons per Hour throughput

Pipe Length

Hydration Period

FLOCCULANT PLANT DESIGN CRITERIA

DESIGN DEVELOPMENTS

ATTRITION SCRUBBERS

ATTRITION SCRUBBING

• Inter-particle collisions in order to change particle

surfaces.

• Used to clean, modify and remove surface coatings

and contaminates.

USES AND APPLICATIONS

• Removal of leached Silicates from HMS.

• Lime Slaking.

• Breakdown of Kimberlitic Clays and Diamond

coatings.

• Removal of oxide surfaces from flotation feed –

significant improvement in Coal and Platinum

recovery.

• Platinum – surface removal of swiped gangue

components or ideal conditioning?

PACIFIC MP ELIMINATES SCALE UP

ISSUES.

• Lab scale tests – Typically 1.5 Litre Denver D12 with

lab attritioning impeller.

•Distance between impeller – 10 mm.

• Large scale machines (Conventional)

•Distance increases from 200 mm in 300 Litre

machine to over 500 mm in 20 cubic meter unit.

• Velocity degradation over distance.

• Pacific MP uses a constant 2.5 times largest particle

size for the distance between the impeller.

CONVENTIONAL AND PACIFIC MP ATTRITION SCRUBBER

WORKING

ZONE

WORKING ZONE

WORKING ZONE

WORKING ZONE

WORKING ZONE

WORKING ZONE

WORKING ZONE

WORKING ZONE

Smaller travel

distance equates to

less velocity

degradation =

greater impact

INSTALLATIONS

•De Beers – Test on breakdown of Kimberlitic clays with

ZERO Diamond breakage. – Multiple tests – Reduction in

10 micron material – 55% to 90% reducing feed to

downstream processes.

• Comparative tests of 3 different rotating assemblies on

HMS concentrates.

• Lime Slaking – Most Efficient.

• OXIDATION REMOVAL – IMPROVED LEACH

KINETICS.

Business Process

Identify obstacle

Propose solution

Develop equipment

Testing

Optimis-ation

Continuous process and equipment development is seen in

all our products.

Pacific MP strives to overcome our customers’ difficulties .

We are committed to continuously developing solutions.

OUR TEAM IS READY TO

ASSIST YOU!

THANK YOU!