/NOT FOR DISTRIBUTION TO UNITED STATES NEWSWIRE SERVICES OR FOR
DISSEMINATION IN THE UNITED STATES/
Preliminary Economic Assessment completed for a 50,000 tonnes per annum
Solvent Extraction Electrowinning copper facility "SXEW"
Substantial cash flow potential based on projected low cash operating
costs
Highlights include:
-
Average annual production over life-of-mine (LOM) of 42,350t LME grade A coppermetal.
-
Operating costs of US$0.63/lb during initial three years (average US$0.92/lb LOM).
- After-tax Internal Rate of Return "IRR" of 48% (Base Case)
- After-tax Net Present Value "NPV" of US$272 million (using 11% discount
rate and US$2.36/lb copper price)
- 15 month payback from the start of production of initial projectcapital cost of $151.4 million (LOM capital cost, including sustaining capital, of $422.4 million).
-
Stage 2 development fully funded from Stage 1 free cash flow.
PERTH, Western Australia, Sept. 28, 2011 /CNW/ - Tiger Resources Limited (ASX/TSX code: TGS) ("Tiger" or "the Company") is pleased to announce it has completed a
Scoping Study (Preliminary Economic Assessment) for a Stage 2 solvent
extraction electrowinning facility("SXEW") at the Kipoi Copper Project (60%) located on the Katanga
copper-belt in the Democratic Republic of Congo ("DRC").
Tiger Resources Managing Director Brad Marwood said "The results from
the preliminary economic assessment underline the robust economics of
the Kipoi Copper Project and this should add further value for our
shareholders."
"The results are very encouraging and demonstrate that Kipoi has the
potential to generate significant cash flow based on its projected low
cash operating costs," Mr Marwood said.
The base case economic analysis uses analysts' consensus forecasts of
the long-term copper price of $2.36/lb over the Stage 2 project life,
generating an after-tax IRR of 48% and NPV (11%) of $272 million. Using copper prices of $3.00 and $3.50, the NPVs increase to $437
million and $593 million respectively, and the IRRs increase
significantly to 57% and 69% respectively.
The existing infrastructure at Kipoi for the Stage 1 Heavy Media
Separation ("HMS") facility acts as a capital springboard for the
development of Stage 2. The HMS plant is expected to produce an average
35,000 tonnes per annum of copper in a 25% concentrate over its 39
month life, and will be superseded in mid-2014 by the Stage 2 SXEW
Plant, which will produce LME Grade A quality copper cathode directly
at the mine-site. Significantly, the Stage 2 operations will initially
process residues from the HMS plant (containing approximately 4.8Mt at
3% Cu), which provides immediate feedstock to Stage 2 operations so
that the mining schedule does not need to recommence until 2016.
Mr Marwood said "The Company's immediate aim is to further improve the
Kipoi economics by expanding the resource, complete the feasibility
study and move Stage 2 into development thus further up the value
curve."
"It is important to note that the combined Kipoi Stage 1 and Stage 2
projects are fully funded on the basis of current average copper price
projections," he said.
Mr Marwood added "The biggest potential impact on the Kipoi project
value is likely to be realised through increasing the Mineral Resource
base available as feed to the Kipoi infrastructure. This will
potentially increase the mine life and/or annual plant throughput. "
Stage 2 Preliminary Economic Assessment
The preliminary economic assessment has been prepared based on the
Scoping Study prepared by engineering consultants ARCCON Mining
Services and incorporating the inputs of other specialist consultants.
The Scoping Study objective was to provide capital costs and operating
cost estimates for a Stage 2 facility at the Kipoi Copper Project with
a plant circuit incorporating two separate 25,000tpa SXEW trains to be
commissioned sequentially, based on:
-
Mining schedule - pit optimisations developed by Cube Consulting
-
Processing plant - flow sheet design and major equipment selection for
processing of Stage 1 HMS residues and mined ore from Stage 2 mining
schedule
-
Tailings dam - design and costing by Coffey Mining Pty Ltd
The cobalt present in the Mineral Resources has not been addressed in
the assessment. This will be addressed over the coming months and
announced separately.
Mineral Resources and Mine Plan
The mining schedule compiled for the Scoping Study was based on all
Kipoi Mineral Resources. Mining is scheduled to commence in the fourth
year of Stage 2 operations, with sequential mining of Kileba and Kipoi
Central phases 1 and 2, followed by Kipoi North and the satellite pits
at Kipoi Central. Mining operations are proposed to commence during
2016, with first ore feed to the plant during 2017.
Pit optimisation studies were undertaken on the three principal
deposits, namely Kipoi Central, Kipoi North and Kileba, and based on
the following input parameters:
Copper Price
|
US$2.30/lb
|
Mining Costs
|
as per current mining contract
|
Pit Slopes
|
minus 37° to 42°
|
Metallurgical Recovery
|
82.5% based on 80% recovery from heap leach and 90% recovery from tank
leach.
|
The remainder of the input parameters have been taken directly from
current operations at Kipoi. All primary mineralisation was assigned
zero recovery for purposes of the optimisation analysis.
Table 1: Kipoi Open Pit Contained Mineral Resources
| Oxide Ore Tonnes | Copper % | Contained Copper (Tonnes) | Strip Ratio |
Kipoi Central
|
23,840,543
|
1.03
|
245,037
|
1.84
|
Kipoi North
|
3,979,800
|
1.46
|
58,192
|
4.28
|
Kileba
|
8,164,305
|
1.28
|
104,187
|
1.29
|
Economic open pit cut-off grades were estimated at 0.38% copper for
Kipoi Central and Kipoi North, and 0.41% copper for Kileba.
For Figure 1 click here: http://files.newswire.ca/937/tiger0928.pdf
Processing
The processing facility will be a conventional solvent extraction
electrowinning (SXEW) processing plant capable of 50,000t per annum
copper cathode production through two parallel streams.
Plant feed will be crushed and washed to separate the +300 µ fraction
from the slimes and the fines. The +300 µ fraction will be sent to heap
leach pads where recoveries are anticipated to be 80%of contained copper while the slimes and fines will be directly fed to a
tank leach system where the anticipated recoveries will be 90%.
This allows flexibility in the process pathway offering options for
high, medium and low grade ores. The HMS generates streams of feed
material available for processing in Stage 2; 1.5 Mt floats at 3%,
0.9Mt slimes at 3%, and 2.4Mt medium grade at 2.6%.
The plant feed schedule will allow the HMS stockpile of the float
rejects to be processed through the heap leach facility followed by the
slimes processed through the tank leach facility. The medium grade
stockpile developed during the first three years will then be depleted.
Capital costs
Costs are estimated to an accuracy of +- 30% including contingency, are
unescalated, include a 3% import duty, and are expressed in US dollars.
The breakdown of costs shown in Table 2 demonstrates $151.4 million of
cost to first production, with a total LOM capital costs, including
sustaining capital, of $422.4 million.
Table 2: Kipoi Stage 2 Project Capital Costs to Start Up
| US$ million (to first production) | US$ million Life of Mine (full cost) |
Accommodation, power supply, initial heap leach pads
|
20.0
|
102.9
|
SX/EW train 1, 25,000tpa
|
69.2
|
69.2
|
Tank CCD circuit
|
19.6
|
78.3
|
SXEW train 2, 25,000tpa
|
42.3
|
84.6
|
Crushing and washing
|
-
|
15.1
|
Tailings Facility
|
-
|
22.9
|
Sustaining Capital
|
0.3
|
49.4
|
Total | 151.4 | 422.4 |
Operating Costs
Costs are estimated to an accuracy of +-30% including contingency, are
unescalated, exclusive of duties and taxes, and expressed in US
dollars.
The operating costs will be $0.63/lb during the initial three years of
operations, during which the stockpiles from the Stage 1 HMS operation
will be treated. Thereafter, Run-of-Mine (ROM) material will be
processed at an average operating cost of $1.07/lb. The average LOM operating cost is US$0.92/lb.
The low gangue acid consumption of the Kipoi deposits, coupled with the
low cost of electricity, results in process operating costs within the
lowest quartile of industry standards.
Table 3: Operating Cost Summary (Initial 3 Years)
|
|
|
|
| US$/a | $/t ore | $/lb Cu |
Mining
|
-
|
-
|
-
|
Process Plant
|
45.182
|
27.11
|
0.41
|
General & Administration
|
11.400
|
6.84
|
0.09
|
Marketing & Product Transport
|
10.619
|
6.37
|
0.11
|
Export Costs
|
1.847
|
1.11
|
0.02
|
| Total | 69.048 | 41.43 | 0.63 |
Table 4: Operating Cost Summary (ROM)
|
|
|
|
| US$/a | $/t ore | $/lb Cu |
Mining
|
28.365
|
6.30
|
0.31
|
Process Plant
|
46.554
|
10.35
|
0.50
|
General & Administration
|
11.400
|
2.53
|
0.12
|
Marketing & Product Transport
|
10.619
|
2.36
|
0.12
|
Export Costs
|
1.847.
|
0.41
|
0.02
|
| Total | 98.785 | 21.95 | 1.07 |
Economic Assessment
The economic assessment was prepared using the expected capital and
operating costs shown in Tables 2, 3 and 4. Modelling incorporates
fiscal aspects of the DRC mining laws and conventions applicable to the
Kipoi project, including:
-
30% DRC corporate tax rate
-
2% DRC state royalty
-
3% import duties
-
60% depreciation rate of capital expenditure (in year of occurrence and
straight line thereafter)
-
2.5% Gecamines royalty
A financial model was developed for a Base Case scenario using a
long-term consensus copper price forecast of US$2.36/lb. The results
are shown in Table 5, together with the results of Upside Cases using
copper prices of $2.50, $3.00 and $3.50 to demonstrate a measure of the
sensitivity of the project economics to copper prices.
Table 5: Summary of Results
Copper price | IRR | Net Free Cashflows | NPV (11%) | Payback (Initial Capital) |
US$/lbCu | (%) | US$M | US$M | Months |
2.36 | 48 | 663 | 272 | 15 |
2.50 | 44 | 715 | 280 | 15 |
3.00 | 57 | 1,044 | 437 | 14 |
3.50 | 69 | 1,374 | 593 | 13 |
The above financial analysis excludes costs related to exploration,
feasibility, financing and interest charges.
Project Implementation and Timing
Tiger has already commenced preliminary work on a definitive feasibility
study.
Metallurgical testwork sample selection, sampling and metallurgical
laboratory selection has commenced, and metallurgical testwork is
underway.
Programs for infill drilling leading to an upgrade of classification of
Mineral Resources have commenced and will proceed over the next two
years. It is anticipated that a feasibility study to support a project
implementation decision will be completed during the first half of
2012.
Preliminary indications are that first copper cathode production can be
achieved 24 months after project approval. Through meeting these
timelines Tiger anticipates achieving a steady cash flow through the
transition from Stage 1 to Stage 2 of the Kipoi Copper Project.
Project Opportunities - Exploration Upside
The biggest impact on the Kipoi project value is likely to be achieved
through increasing the Mineral Resource base available as feed to the
Kipoi processing facilities, which potentially will increase the mine
life and/or annual plant throughput. Tiger is therefore committed to
active exploration programmes with anticipated programme costs in
excess of US$10 million.
Over the next two years Tiger plans to define all significant
mineralisation within the Kipoi project area and undertake sufficient
drilling to convert this mineralisation into Mineral Reserves.
At the same time Tiger will be actively pursuing opportunities to
increase landholdings within economic haulage distance of the central
processing facility at Kipoi.
Potential also exists to add to the resources at the 100%-owned Lupoto
Copper Project just 25 km from Kipoi, where a maiden Mineral Resource
was recently declared for the Sase Central deposit.
Technical report
A Canadian NI 43-101 technical report on the Scoping Study is in
progress and will be filed on the Company's profile on SEDAR within 45
days of this announcement.
BACKGROUND
The Kipoi Project covers an area of 55 square kms and is located 75km
north‐north‐west of the city of Lubumbashi in the Katanga Province of
the DRC. The project contains a 12km sequence of mineralised Roan
sediments that host at least five known deposits: Kipoi Central, Kipoi
North, Kileba, Judeira and Kaminafitwe.
The Company has reported JORC-standard resources at three of the
deposits. The principal deposit is Kipoi Central, which contains a zone
of high grade copper mineralisation within a much larger, lower grade
global resource.
The Company proposes a staged development at the Kipoi Copper Project.
The high grade zone of mineralisation at Kipoi Central will be
exploited during the Stage 1 development. During the three-year
operation of Stage 1, 900,000tpa of 7% Cu is planned to be processed
through a HMS plant with a recovery rate of 60%, to produce the
equivalent of approximately 35,000tpa of copper.
The Company is currently undertaking a feasibility study to evaluate the
economic viability of constructing a SXEW plant (Stage 2), targeted to
come onstream within three years of the start of the HMS operation. It
is envisaged that ore from Kipoi Central, Kipoi North and Kileba South
and the other deposits within the Kipoi Project and within the nearby
Lupoto Project would be processed during the Stage 2 phase.
Technical Information
Additional information on Tiger and its projects and operations is
contained in technical reports filed under the Company's profile on the
SEDAR website (sedar.com)
The Scoping Study (Preliminary Economic Assessment ("PEA")) for the
Stage 2 SXEW is based on Indicated and Inferred Mineral Resources. The
PEA is preliminary in nature and the Inferred Mineral Resources are
considered too speculative geologically to have the economic
considerations applied to them that would enable them to be categorised
as Mineral Reserves. There is no certainty that the outcomes described
in the PEA will be realised. Mineral Resources that are not Mineral
Reserves do not have demonstrated economic viability.
The Indicated and Inferred Mineral Resources referred to in this
announcement and pertinent to the PEA are reproduced below:
Appendix A: Kipoi Central deposit. (Grade tonnage reported above a
cut-off of 0.50% copper)
|
|
|
|
|
|
|
|
Category
|
Tonnes
(Mt)
|
Copper
grade
(%)
|
Cobalt
grade
(%)
|
Ag
grade (g/t)
|
Copper
(000t)
|
Cobalt
(000t)
|
Ag
(000'oz)
|
Measured
| 9.18 | 3.78 | 0.14 | 3.68 | 347 | 13 | 1,085 |
Indicated
| 14.28 | 1.31 | 0.07 | 2.29 | 181 | 9 | 1,052 |
Measured & Indicated
| 23.46 | 2.28 | 0.09 | 2.83 | 535 | 22 | 2,138 |
Inferred
| 12.02 | 0.85 | 0.05 | 0.47 | 102 | 6 | 182 |
Appendix B: Kipoi North and Kileba South Inferred Mineral Resource
estimate. (Lower cut-off 0.5% copper)
|
|
|
|
|
|
|
|
|
Tonnes
(M)
|
Copper %
Grade
|
Cobalt %
Grade
|
Silver g/t
|
Copper
(000't)
|
Cobalt
(000t)
|
Silver
(000oz)
|
Kipoi North
| 5.3 | 1.36 | 0.03 | 8.1 | 71.6 | 2.6 | 1,372 |
Kileba South
| 9.5 | 1.4 |
|
| 133 |
|
|
Total
| 14.8 | 1.38 |
|
| 204.6 | 2.6 | 1,372 |
Competent & Qualified Person's Statement:
Information in this news release that relates to the Scoping Study has
been prepared under the supervision of Mr John McCowan, a director and
employee of Arccon (WA) Pty Ltd, a registered Professional Engineer of
Queensland and a Professional Member of SME.
The mining engineering section of the Scoping Study, which includes open
pit optimisation and production schedules, was prepared under the
supervision of Quinton de Klerk, of Cube Consulting Pty Ltd. Mr De
Klerk has sufficient experience which is relevant to the activity
which he is undertaking to qualify as a Competent Person as defined in
the JORC Code and a "Qualified Person", as such term is defined in the
Canadian National Instrument 43 - 101. Mr de Klerk has reviewed and
approved the contents of this news release relevant to this section.
Scientific or technical information in this news release other than
relates to the Scoping Study has been prepared by Mr Bradley Marwood,
Managing Director and a full-time employee of the Company and a member
of the Australasian Institute of Mining and Metallurgy ("AusIMM"). Mr
Marwood has sufficient experience which is relevant to the activity
which he is undertaking to qualify as a Competent Person as defined in
the JORC Code and to qualify as a "Qualified Person" under Canadian
National Instrument 43-101. Mr Marwood consents to the inclusion in
this news release of the matters based on his information in the form
and context in which it appears.
Scientific or technical information in this news release other than
relates to the Scoping Study has been prepared by Mr Bradley Marwood,
Managing Director and a full-time employee of the Company and a member
of the Australasian Institute of Mining and Metallurgy ("AusIMM"). Mr
Marwood has sufficient experience which is relevant to the activity
which he is undertaking to qualify as a Competent Person as defined in
the JORC Code and to qualify as a "Qualified Person" under Canadian
National Instrument 43-101. Mr Marwood consents to the inclusion in
this news release of the matters based on his information in the form
and context in which it appears.
Caution Regarding Forward Looking Statements:
The forward-looking statements made in this report are based on
assumptions and judgments of management regarding future events and
results. Such forward-looking statements, including but not limited to
those with respect to the Stage 1 mining operation and the planned
Stage 2 mining operation at the Kipoi Project involve known and unknown
risks, uncertainties, and other factors which may cause the actual
results, performance or achievements of the Company to be materially
different from any anticipated future results, performance or
achievements expressed or implied by such forward-looking statements.
Such factors include, among others, the actual market prices of copper,
cobalt and silver, the actual results of future mining, processing and
development activities, changes in project parameters as plans continue
to be evaluated, as well as those factors disclosed in the Company's
filed documents.
There can be no assurance that the Stage 1 HMS plant will operate in
accordance with forecast performance, that anticipated metallurgical
recoveries will be achieved, that future evaluation work will confirm
the viability of deposits identified within the project, that future
required regulatory approvals will be obtained, that the Stage 2
expansion of the Kipoi Project will proceed as planned and within
expected time limits and budgets or that, when completed, the Kipoi
Stage 2 project will operate as anticipated.
<p> </p> <p align="justify"> in respect of the Company's activities, please contact: </p> <table class="cnwBorderedTable" border="1" cellspacing="0"> <tr valign="top"> <td align="left"> Brad Marwood </td> <td valign="top" align="left"> Stephen Hills </td> <td valign="top" align="left"> Nathan Ryan </td> </tr> <tr valign="top"> <td align="left"> Managing Director </td> <td valign="top" align="left"> Chief Financial Officer </td> <td valign="top" align="left"> Investor Relations </td> </tr> <tr valign="top"> <td align="left"> Tel: (+61 8) 9240 1933 </td> <td valign="top" align="left"> Tel: (+61 8) 9240 1933 </td> <td valign="top" align="left"> Tel: (+614) 20 582 887 </td> </tr> <tr valign="top"> <td align="left"> Email: <a href="mailto:bmarwood@tigerez.com">bmarwood@tigerez.com</a> </td> <td valign="top" align="left"> Email: <a href="mailto:shills@tigerez.com">shills@tigerez.com</a> </td> <td valign="top" align="left"> Email: <a href="mailto:nryan@tigerez.com">nryan@tigerez.com</a> </td> </tr> </table> <p> <b>Company website: </b><a href="http://www.tigerresources.com.au">www.tigerresources.com.au</a> </p> <p> </p>