Perpetual Resources complete first round of exploration
Thursday, January 30 2014 - 12:45 PM WIB
ASX-listed Perpetual Resources Limited said on Thursday it has completed the first round of exploration on the PT Atoz site and it is evaluating the results and looking at various options in relation to the asset.
The final results from the drilling campaign are set out below.
Results from a 4.75mm sink and float test for a composite sample from Area 1 East confirm an 18% product of anthracitic coal can be produced with quality parameters presented in Table 1.
| ? | ? | Moisture | Ash | Volatile | Fixed | Total | Calorific | |
| ? | ? | ? | Content | Matter | Carbon | Sulphur | Value | |
| ? | ? | (%) | (%) | (%) | (%) | (%) | Cal/g | |
| ? | ? | ? | ? | ? | ? | ? | ? | Average |
| ? | (%) | adb | adb | adb | adb | adb | adb | daf |
| Anthracite | 17.7 | 2.97 | 12.28 | 6.58 | 78.17 | 2.46 | 6,899 | 8,139 |
| Thermal | 32.0 | 5.14 | 26.36 | 8.48 | 60.02 | 1.54 | 5,121 | 7,452 |
| Coal | 49.7 | 4.37 | 21.35 | 7.80 | 66.48 | 1.87 | 5,754 | 7,696 |
| Waste | 50.3 | 7.26 | 65.45 | 10.15 | 17.15 | 0.86 | 1,514 | 5,393 |
| Total | 100.0 | 5.82 | 43.53 | 8.98 | 41.67 | 1.36 | 3,621 | 6,538 |
The key highlight is identification of a 78% Fixed Carbon product of anthracitic grade coal from this test work with 18% recovery after washing from the complex seam. Anthracite comprises perhaps less than 1% of known coal deposits in the world and commands a +US$150/t price for +75% FC (FC=Fixed Carbon) product in Indonesia. The thermal coal product represents an additional 32% recovery from the seam with good quality parameters. The combined anthracite and thermal coal product recoveries are 50% which is greater than the visually logged cumulative plies of greater than 3cm thickness which represents 18% of the complex seam.
The coal plies included in the tonnage estimate varied in thickness from 2cm to over 50cm within a complex seam. For these tonnage estimates, all the coal plies and interstitial al waste between the seams was bulked together as a "complex seam". It was assumed that coal, even in plies down to 2cm thick, could be recovered by "washing" the mined seam to recover a clean high quality coal product suitable for sale.
Usually the washing process uses a dense fluid to float the lighter coal, which is usually very clean, while the denser waste rock without any coal sinks. The waste can then be separated at the washing plant and piped for storage in a tailings dam or, if it is convenient, replaced in the mined out pit.
Atoz Coal Project is located 60 kilometers south of Padang in the central west of West Sumatra. The project covers 192.08 hectares and has an approved production license (Production IUP).
Editing by Johannes Simbolon