Summary:
The graphite mineralisation at Siviour is hosted within a sequence of schist, micro-gneiss and metasedimentary rocks. The mineralised zone has a simple tabular geometry and the main portion of the deposit is oriented east-west.
Summary:
The geometry of the Siviour Graphite Deposit is generally flat-lying, with thick, flat, gently folded graphite mineralisation sitting from within 5 m to 15 m of surface. This orientation facilitates a single shallow mining design that can be mined via conventional open pit mining methods.
The DFS pit optimisation and mining study resulted in a mining schedule conducted in 14 stages mined over a period of 26 years. Mining commences in the southern portion of the orebody to permit mining of a higher-grade corridor in the mine’s first year.
The proposed mining method is conventional truck and shovel open pit bench mining. Free digging in alluvial material makes up around 15% of all overburden, while drill and blast is required for all other lithologies.
Initially, mining will be conducted on a 24-hour basis in order to access high grade ore as soon as possible, before dropping to day-shift only in years 2 and 3. Mining will return to a 24-hour operation in Year 5, coinciding with the process plant expanding to 1,650ktpa capacity.
Flow Sheet:
Flow Sheet:
Summary:
The DFS considers the construction of two 825ktpa processing plants, for a total processing capacity of 1,650ktpa, with the construction of the second plant to potentially be funded from projected cash-flows derived from graphite sales from the first plant. The plants are based on identical designs.
Crushing
Crushing will occur in two stages. In the first stage, a primary jaw crusher will crush ore from the pre-blended ROM pad, and crushed product will be conveyed to a scrubber. The scrubber oversize will be crushed in a secondary pebble crusher and conveyed back to the scrubber feed. The primary crushing circuit operates at higher capacity than the mill to allow for a crushed ore stockpile.
Grinding
Crushed, scrubbed ore will be conveyed to a primary rod mill to achieve flotation feed of P99 425 µm. The mill discharge will be collected in a hopper before being pumped to a vibrating screen, with oversized material recycled back to the rod mill. The fine ........

Recoveries & Grades:
Commodity | Parameter | Avg. LOM |
Graphite
|
Recovery Rate, %
| 91 |
Graphite
|
Head Grade, %
| 7.4 |
Graphite
|
Concentrate Grade, %
| 94 |
Projected Production:
Commodity | Units | Avg. Annual | LOM |
Graphite
|
kt
| 105 | 4,394 |
All production numbers are expressed as concentrate.
Operational Metrics:
Metrics | |
Stripping / waste ratio
| 1.9 * |
Ore tonnes mined, LOM
| 62,015 kt * |
Tonnes milled, LOM
| 62,015 kt * |
Annual milling capacity
| 1,650 kt * |
* According to 2019 study.
Reserves at April 30, 2019:
Category | Tonnage | Commodity | Grade | Contained Graphite |
Probable
|
45.2 Mt
|
Graphite
|
7.9 g/t
|
3.6 Mt
|
Measured
|
15.8 Mt
|
Graphite
|
8.8 g/t
|
1.4 Mt
|
Indicated
|
39.5 Mt
|
Graphite
|
7.2 g/t
|
2.8 Mt
|
Inferred
|
32.1 Mt
|
Graphite
|
7.2 g/t
|
2.6 Mt
|
Total Resource
|
87.4 Mt
|
Graphite
|
7.5 g/t
|
6.6 Mt
|
Mine Management:
Job Title | Name | Phone | Email | Profile | Ref. Date |
.......................
|
.......................
|
.......................
|
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|
|
Sep 13, 2021
|
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Corporate Filings & Presentations:
Document | Year |
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|
2021
|
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|
2019
|
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|
2019
|
Press Release
|
2018
|
Other
|
2017
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