SCIDEV LTD — Investor Presentation 2008

Apr 28, 2008

ABN 25 001 150 849

Gordon Chiu Building J01 Phone: 02-9351-6741 Department of Chemical Engineering Fax: 02-9351-7180 Maze Crescent Email: mail@intec.com.au University of Sydney NSW 2006 Website: www.intec.com.au Australia ASX code: INL

Companies Announcements Office 29 April 2008 Australian Securities Exchange

Presentation to the “Mining Tasmania” Conference

At the "Mining Tasmania" Conference being held at Strahan on the west coast of Tasmania today, Intec's Chief Operating Officer Brian Banister will be giving the attached presentation entitled "Intec at Hellyer: Building Profitable Partnerships".

Yours faithfully Intec Ltd

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Philip R Wood

Managing Director and Chief Executive Officer

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ASX code: INL

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Intec[Ltd]

Intec at Hellyer: Building Profitable Partnerships Presentation to Mining Tasmania Conference Strahan Tuesday, 29 April, 2008

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Intec in Northwestern Tasmania
80km road and
rail access from Burnie deepwater port
IHM demonstration plant
project to port
Hellyer Zinc Concentrate
Project
&
Hellyer Residues Project
Intec Zeehan
Residues
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Intec in Northwestern Tasmania

Project Partnerships at Hellyer

• Polymetals joint venture

• Bass Metals exploration

• Other regional producers and explorers

• Zinc and steel industry participants

• Government

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One site. Two technologies
Hellyer Zinc Hellyer Residues
Concentrate Project Project
Conventional grinding and Hydrometallurgical
flotation processing of EAF dust and
low-grade concentrates
Bulk zinc/lead concentrate
Zinc oxide, lead sulphide and
calcium sulphate co-products
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Hellyer Zinc Concentrate Project

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	Hellyer Tailings Resource - 11Mt Element Grade Quantity In-situ US$m % of metal value*
	Zinc 2.8 % 305,000t 742 23%
	Lead 3.0 % 330,000t 1,038 32%
	Silver 88 g/t 30,850,000 ozs 532 16%
	Gold 2.6 g/t 910,000 ozs 1,012 26%
	Copper 0.16% 17,400t 144 4%
	Total $3,298 100% * US$ metal prices at 19 February 2008

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Hellyer History

• -Mine operated by Aberfoyle & Western Metals 1989-2000

• -Treated 14.6 Mt, 12% Zn, 6% Pb, 148 g/t Ag

• -Acquired by Intec in 2004

• -Intec Hellyer Mill restarted in 50/50 JV with Polymetals in December 2006

• -First shipment 30[th] January 2007

• -Record weekly production achieved twice in March 2008

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Hellyer Zinc Concentrate Project – Aerial view
Tailings Dam Road & Rail
50 hectares Access
Site for
Re-treatment
Tailings Dam
(if required) Mine Adit (plugged)
Electricity Grid 1.5 Mtpa Hellyer Mill
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Hellyer Zinc Concentrate Project – Dredge launch
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Hellyer Zinc Conc. Project – Dredge operating near the NE wall
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Hellyer Zinc Concentrate Project – Thickening & Stock tanks
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Hellyer Zinc Concentrate Project

Tailings Processing

• -Polymetals operates the Intec Hellyer Mill on a day to day basis

• -Thicken in 20m thickener

• -12 hours buffer capacity at stock tanks allows for variations in dredging

• -Mill at 100-180tph (grade dependent) in 2MW ball mill

• -Grind from 45 microns to 25 microns

• -Rougher float; pH 10.5 lime, copper sulphate, xanthate, frother

• -Regrind rougher con to 12 microns using 2 x 355 kW tower mills and 2 x 855 KW high intensity conditions (sand)

• -3 stages of cleaning at up to pH 12

• -Final concentrate in two specifications

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Hellyer Zinc Concentrate Project – Grinding circuit
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Hellyer Zinc Concentrate Project – Flotation circuit

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Hellyer Zinc Concentrate Project

High Intensity Conditioners

• -Use sand to change the surface charge on ZnS particles after milling

• -Improved flotation recovery for Zn, ~10%

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Hellyer Zinc Concentrate Project

Magnetic Aggregation

• -Fine particles can have low residence time in the float cells

• -Fine particles can also lack momentum to bond to air bubbles -Magnetic aggregation can cause certain susceptible minerals to aggregate, increasing recoveries

• -Incremental improvement (~2.5%) in cleaner float

• -Now being trialled in rougher float

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Hellyer Zinc Concentrate Project

Metal Distribution in Flotation Circuit(March 2008) % Mass Flow % Distribution Zn Pb Feed 100 100 100 Rougher Concentrate 36.3 92.4 71.6 Rougher Tail 63.7 7.6 28.4 Final Concentrate 7.0 72.5 23.4 Cleaner Tail 29.3 19.8 48.2 Final Tail 93.0 27.5 76.6	Metal Distribution in Flotation Circuit(March 2008) % Mass Flow % Distribution Zn Pb Feed 100 100 100 Rougher Concentrate 36.3 92.4 71.6 Rougher Tail 63.7 7.6 28.4 Final Concentrate 7.0 72.5 23.4 Cleaner Tail 29.3 19.8 48.2 Final Tail 93.0 27.5 76.6	Metal Distribution in Flotation Circuit(March 2008) % Mass Flow % Distribution Zn Pb Feed 100 100 100 Rougher Concentrate 36.3 92.4 71.6 Rougher Tail 63.7 7.6 28.4 Final Concentrate 7.0 72.5 23.4 Cleaner Tail 29.3 19.8 48.2 Final Tail 93.0 27.5 76.6	Metal Distribution in Flotation Circuit(March 2008) % Mass Flow % Distribution Zn Pb Feed 100 100 100 Rougher Concentrate 36.3 92.4 71.6 Rougher Tail 63.7 7.6 28.4 Final Concentrate 7.0 72.5 23.4 Cleaner Tail 29.3 19.8 48.2 Final Tail 93.0 27.5 76.6
	% Mass Flow	% Distribution
		Zn	Pb
	100	100	100
	36.3	92.4	71.6
	63.7	7.6	28.4
	7.0	72.5	23.4
	29.3	19.8	48.2
	93.0	27.5	76.6

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Production Statistics

	March 2007 Quarter	June 2007 Quarter	Sept 2007 Quarter	Dec 2007 Quarter	March 2008 Quarter
Tailings treated (tonnes)	324,389	240,626	247,874	366,513	271,144
Zinc (%)	2.5	3.5	2.8	2.1	3.0
Lead (%)	2.6	3.3	3.1	2.9	3.1
Silver (g/t)	138	89	78	71	83
Bulk zinc/lead concentrate (dry tonnes)	10,401	13,813	11,820	11,250	14,691
Contained zinc (t)	4,049	5,248	4,021	4,113	5,383
Contained lead (t)	700	1,386	1,447	1,391	1,801
Zn recovery (%)	51	62	59	55	67
Pb recovery (%)	8.3	18	19	13	21
Contained silver (kg)	2,289	2,101	2,152	2,161	3,269

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Hellyer Zinc Concentrate Project – Trucking

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Hellyer Zinc Concentrate Project – Port storage and loading
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Concentrate is loaded
into hoppers feeding the
conveyor
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Hellyer Zinc Concentrate Project – Bulk shipments
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The conveyor feeds to the hold of the bulk carrier

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Hellyer Zinc Concentrate Project

Product specifications

	Tailings Feedstock (average)	Product Spec 1	Product Spec 2
Zn %	2.8	37	32
Pb %	3.0	10	15
Ag ppm	88	200	200

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Hellyer Zinc Concentrate Project

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Initially used shale quarry pit for
Recently installed eastern and western arm retreated tailings (1Mt). Now full
embankments. Tailings slurry currently
filling western arm.
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Hellyer Zinc Concentrate Project

Ongoing Improvements

• -Total contained Zn+Pb up 51% y-o-y

• -Dredge capabilities improved

• -Two specifications of concentrate product -Increased rougher float capacity (residence) -High intensity conditioners

• -Magnetic particle aggregation

• -Project life extended to 7-8 years

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Exploration: Bass Metals Ltd
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BSM’s Que River
Mining Area
Fossey Zone
Intercept
Intec Hellyer
Mill and future
Residues Project Site
Closed Hellyer Mine
Portal
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Mining at Que River
Meas. Indic. Infer.
Tonnes 56 486 194
Zn % 2.1 6.2 5.3
Pb % 0.7 3.1 2.9
Cu % 1.7 1.1 0.9
Ag g/t 69 87 79
Au g/t 0.3 1.0 0.93
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Bass Metals Exploration

Fossey Zone

• -2 km from Intec Hellyer Mill

• -High-grade massive sulphide intercepts

• -57.5 metres at 9.2% Zn, 4.7% Pb, 94 g/t Ag and 2.89 g/t Au

• -19 metres at 7.2% Zn, 3.5% Pb, 65 g/t Ag and 2.79 g/t Au

• -21.4 metres at 17.3% Zn, 8.3% Pb, 231 g/t Ag and 3.36 g/t Au

• -12 diamond drill holes now complete

• -Also exploring Hellyer Mine & Magnet Projects, close to the Intec Hellyer Mill

• -Bass Metals is paying for scoping study for second flotation circuit at the Intec Hellyer Mill

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Intec Hellyer Mill

Other Regional Zn/Pb Explorers

• -Tasman Crown, Mt Lyell (Copper Mines of Tasmania)

• -Comstock and Oceania deposits (Zeehan Zinc)

• -Professor deposit (Icon Resources)

• -Stonehenge and Federation Tin (Sweeney deposit) projects (Stonehenge Metals Ltd)

• -Regional exploration tenements (ASF, China)

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The Intec Process

Chloride-based hydrometallurgical recovery of base and precious metals from ores, concentrates, tailings and wastes

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Hellyer Residues Project
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Moist EAF dust from OneSteel’s Laverton Mill, stored in drums on-site at Intec’s Burnie Demonstration Plant

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Intec is the World Leader in Chloride Hydrometallurgy
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Hellyer Residues Project
Road & Rail
Access
EAF dust storage
Hellyer
Residues
Project Plant
Electricity grid Existing 1.5 Mtpa Hellyer Mill
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-Australasian EAF Dust Production
-OneSteel Rooty Hill ~9,000 tpa
-OneSteel Laverton ~12,000 tpa
-OneSteel Waratah ~3,000 tpa
-Pacific Steel Auckland ~4,000 tpa
- Total ~28,000 tpa
-Intec EAF Dust Stockpile
-Current Footscray stockpile ~27,500 t
-Stockpile at maximum (30/6/09) ~49,000 t
-Hellyer Residues Project scale 35,000 tpa
-7 years to eliminate stockpile
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EAF Dust Storage at Footscray

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EAF Dust Storage Bunker at Hellyer Now receiving EAF dust

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Important Relationships for Intec’s Hellyer Residues Project

• Outotec OYJ technical collaboration agreement

• OneSteel Limited EAF dust supply agreement

• Veolia Environmental Services (Australia) Pty Ltd collaboration agreement

• Multiserv Group Ltd approach

• Nyrstar (Risdon & Belgium) negotiations

• Developing Chinese customers

• Local, State and Federal Governments

• Local community

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Hellyer Zinc Concentrate Project

Government Participation - Rail

• -Federal Government has announced an $11.7m upgrade of the Hellyer spur line and extension of Melba Flats rail line to Zeehan

• -Potential to remove over 175,000tpa of feedstock and product transport from the road for the Hellyer Projects

• -Future benefit for transport of 460,000t stockpile of Zeehan residues

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Intec’s Environmental Advantages for EAF dust

• -95% zinc recovery

• -Full lead and silver recoveries

• -CaSO4 or CaS by-products

• -Low energy consumption

• -Environmentally stable residue -Potential for ‘zero waste’ solution

• -Hematite can potentially be sold as iron ore

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Simplified Process Schematic
EAF dust
Magnetic
Separation
Iron residue to
tailings dam or
industry
Leach 1 Leach 2
Recovery
Regeneration
Zn product
H2SO4
Ca-based by-product
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C0-Product

1. Intec Calcium Sulphate

A high purity calcium sulphate crystal is obtained at the Acid Regeneration stage (by mixing 98% sulphuric acid with Intec purified calcium chloride solution).

1. High grade (90%) calcium sulphide

An environmentally friendly sulphidising reagent effectively removes heavy metals under a wide range of conditions.

1. Calcium sulphate whisker An international commodity name is “ONODA-GPF”. It has excellent reinforcing function and flame-retarding property with 1/200 or 1/300 of the price of silicon carbide whisker.

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EAF dust
Mag. Sep.
Iron residue
to tailings
dam
Leach 1 Leach 2
Recovery
Regeneration
Zn product
H2SO
4
Carbon 1. Intec Calcium Sulphate
Reduction
2. Calcium Sulphide (~90%)
Crystal 3. Calcium Sulphate Whisker
Modification
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Crystal Modification
(already demonstrated in China)
By- Base Case: Intec Case 2: Case 3: Calcium
Products calcium sulphate Calcium sulphide sulphate whisker
Price [] US$ 100-500 /t US$ 1,180 /t US$ 2,000 /t
These estimated current prices have not been discounted for potential additional production from the Hellyer Residues
Project. Intec is currently marketing by-product samples via its Guangzhou representative office.
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Stage 2 of the HRP: Unlocking lead value from tailings
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High recoveries
Significant lead
value unlocked
Low recoveries
Pb Grade
Acceptable grade Minimum saleable
for Intec Process grade for smelters
Pb Recovery
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Intec’s Environmental Advantages

• -Highest zinc recovery (95+%) of competing technologies

• -Full lead and silver recoveries

• -Low energy consumption -Environmentally stable residue

• -Potential for ‘zero waste’ solution

• -Discussions opened with Cement Australia, Railton, Tasmania

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Technology Potential

• -Additional EAF dust sources

• -potential regional plants worldwide (including China)

• -Other metalliferous residue feedstocks

• -(e.g. Zeehan slags)

• -Synergistic projects combining ores and wastes -Equity in projects -Licensing and royalty opportunities

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The Future

Intec's future is to increase positive cashflow as a mining company, while also becoming a minerals processing technology provider worldwide.

Intec will participate in base and precious metals projects wherever our corporate capabilities and the Intec Process enhance economic and environmental outcomes.

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Brian Banister Chief Operating Officer Email: brian.banister@intec.com.au

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Intec Ltd Gordon Chiu Building, J01 Department of Chemical Engineering Maze Crescent, University of Sydney NSW 2006 AUSTRALIA Tel: +61-2-9351-6741 Fax: +61-2-9351-7180 Web: www.intec.com.au

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