SCIDEV LTD — Investor Presentation 2008

Feb 20, 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 21 February 2008 Australian Securities Exchange

3rd Annual Mine Tailings Conference

Please find attached the presentation that I will be delivering today to the 3rd Annual Mine Tailings Conference in Brisbane.

Yours faithfully, Intec Ltd

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Philip R Wood Managing Director & Chief Executive Officer

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ASX code: INL

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Intec[Ltd]

Presentation to 3[rd] Annual Mine Tailings Conference Brisbane Thursday, 21 February, 2008

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Two processes for the recovery of metals from tailings

Hellyer Tailings The Intec Process Project Hydrometallurgical Conventional grinding and processing of low-grade flotation concentrates Bulk zinc/lead concentrate Metal oxide or sulphide intermediates and/or pure metal products

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Hellyer Tailings Project
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Hellyer Tailings Project
80km road and
rail access from Burnie deepwater port
IHM demonstration plant
project to port
Hellyer Tailings Project
&
Hellyer Residues Project
Intec Zeehan
Residues
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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

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Hellyer Tailings Resource - 11Mt

Element	Grade	Quantity	In-situ	% of metal
			US$m*	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 Tailings 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 Tailings Project – Dredge launch
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Hellyer Tailings Project – Dredge operating near the NE wall
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Hellyer Tailings Project – On the dredge
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Hellyer Tailings Project – Shore tanks constructed

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Hellyer Tailings Project – Stock tanks
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Hellyer Tailings Project – Grinding circuit
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Hellyer Tailings Project – Flotation circuit

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Hellyer Tailings Project – Trucking

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Hellyer Tailings Project – Port storage and loading

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Concentrate is loaded
into hoppers feeding the
conveyor
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Hellyer Tailings Project – Bulk shipments
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The conveyor feeds to the hold of the bulk carrier

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Hellyer Tailings Project
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Hellyer Tailings Project

Tailings Processing

• -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 Tailings 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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Production Statistics

	Dec 2006 Quarter	March 2007 Quarter	June 2007 Quarter	Sept 2007 Quarter	Dec 2007 Quarter
Tailings treated (tonnes)	131,324	324,389	240,626	247,874	366,513
Zinc (%)	2.2	2.5	3.5	2.8	2.1
Lead (%)	2.2	2.6	3.3	3.1	2.9
Silver (g/t)	96	138	89	78	71
Bulk zinc/lead concentrate (dry tonnes)	2,878	10,401	13,813	11,820	11,250
Contained zinc (t)	1,131	4,049	5,248	4,021	4,113
Contained lead (t)	279	700	1,386	1,447	1,391
Zn recovery (%)	39	51	62	59	55
Pb recovery (%)	9.6	8.3	18	19	13
Contained silver (kg)	660	2,289	2,101	2,152	2,161

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Hellyer Tailings Project
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 Tailings Project

Tailings Management

• -Rainwater diversion drain: 2500mm annual rainfall

• -Overflow can trail off to nil during summer

• -Lime addition before deposition to manage pH

• -Monitor pH, dissolved metals, solids, chloride and sulphate

• -Tailings water treatment plant and artificial wetland below main tailings dam

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Hellyer Tailings Project

Achievements

• -Successfully restarted in December 2006

• -50-70% zinc recovery to zinc / lead concentrate

• -Regular production from uneven tailings feedstock

• -Profitable production, ~A$2m per shipment to the JV

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Hellyer Tailings Project

Ongoing Improvements

-Dredge capabilities improved

-Ongoing optimisation efforts underway

-Two specifications of concentrate product

• -High intensity conditioners

• -Magnetic particle aggregation

-Project life extended to 7-8 years

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Hellyer Tailings Project

Rail Transport Improvements

-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 150,000tpa 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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The Intec Process – Burnie Demonstration Plant (interior)
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The Intec Process – Burnie Demonstration Plant (exterior)
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Intec Process Technology Portfolio
The World Leader in Minerals
Processing Chloride Hydrometallurgy
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Simplified Process Schematic
Metal-bearing
feedstock
Chloride
Leach
H2SO4
Iron and elemental
sulphur residue to
Regeneration tailings dam or industry Purification
By-products
Recovery
Ca-based by-product Primary product
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Unlocking value from tailings
High recoveries
Significant value
unlocked
Low recoveries
Grade
Acceptable grade Minimum saleable
for Intec Process grade for smelters
Recovery
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The Intec Process
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Burnie Demonstration Plant

• -Campaign operations

• -Generating engineering data

• -Finalising the process flowsheet for the Hellyer Residues Project

• -Preparation of sample products for marketing and establishment of sales contracts

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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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Hellyer Residues Project
Road & Rail
Access
EAF dust storage
Hellyer
Residues
Project Plant
Existing
1.5 Mtpa Hellyer
Mill
Electricity grid
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Focus on getting into production quickly

• -As soon as possible during strong metals prices cycle

• -Lowest possible capital and operating cost -Minimum technical risk options

Staged Development

• -Stage 1: 35,000tpa EAF dust recycling

• Stage 2: ~56,000tpa low-grade lead concentrate from tailings

• -Stage 3: Zeehan lead smelter slags

• -(450,000t grading ~16% Zn equivalent)

• -Project approval received for both Stage 1 and Stage 2

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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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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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Philip R Wood Managing Director & CEO Email: philip@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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