Base Resources Limited Further supporting information for Bumamani PFS

 
TIDMBSE 
 
AIM and Media Release 
 
3 September 2021 
 
BASE RESOURCES LIMITED 
Further supporting information for Bumamani PFS 
 
African mineral sands producer, Base Resources Limited (ASX & AIM: BSE) (Base 
Resources or the Company) provides the following further supporting information 
in respect of the outcomes of the Bumamani pre-feasibility study announced 
earlier today (Bumamani PFS). 
 
Mining method 
 
The mining method assumed for the Bumamani PFS was hydraulic mining, utilising 
Kwale Operations' existing hydraulic mining units (HMUs).  This mining method 
has been successfully used at Kwale Operations since 2017.  It is 
non-selective, with hydraulic mining units using high pressure water jets to 
sluice the entire ore face, creating an ore slurry which can then be pumped to 
the wet concentrator plant. 
 
Processing method 
 
Material mined would be processed through Kwale Operations' existing wet 
concentrator plant and mineral separation plant.  Recovery factors assumed are 
the same as those currently experienced at Kwale Operations and are set out in 
the table below.  This is supported by the metallurgical testwork carried out 
on the Kwale North Dune (which includes the P199 section the subject of the 
Bumamani PFS). 
 
The metallurgical testwork comprised wet concentrator and mineral separation 
plant tests on bulk samples collected from two 61cm diameter holes drilled in 
the Kwale North Mineral Resource, as part of the earlier Kwale North 
pre-feasibility study1.  One of the holes (KN091) was adjacent to the P199 
section, which forms part of the Bumamani PFS.  Discrete ore zones were sampled 
(Ore1, Ore4 and Ore5) from each hole.  The samples were dried and shipped to 
Brisbane, Australia for processing through IHC Robbins' laboratory.  Samples of 
the fine tailings generated by IHC Robbins were sent to Outotec Metso for 
thickener testwork.  The results of the testwork were not materially different 
to the run of mine results currently being achieved from mining the Kwale South 
Dune deposit. No metallurgical testwork was completed on the Bumamani deposit, 
however, it exhibits similar characteristics (including particle size) to ore 
currently mined at Kwale South Dune and is expected to achieve similar 
processing results, including mineral recoveries, as those achieved from mining 
the Kwale South Dune ore.  With material from the Bumamani deposit and the P199 
section to be mined and processed concurrently with the Kwale South Dune 
deposit, product recoveries similar to those currently achieved from mining 
Kwale South Dune ore were assumed for the Bumamani PFS. 
 
Description                         Units   Testwork Result  Bumamani PFS 
                                                             (consistent with 
                                                             current) 
 
Concentrate grade                   %       85.1             85 
 
HM recovery - wet concentrator      %       83.0             79.5 
plant 
 
Ilmenite recovery - wet             %       94.6             91.8 
concentrator plant 
 
Rutile recovery - wet concentrator  %       94.8             91.2 
plant 
 
Zircon recovery - wet concentrator  %       98.0             96.3 
plant 
 
Ilmenite recovery - mineral         %       N/A              100 
separation plant 
 
Rutile recovery - mineral           %       N/A              100.5 
separation plant 
 
Zircon recovery - mineral           %       N/A              84 
separation plant 
 
[Note (1):  For further information, refer to Base Resources' market 
announcement on 1 April 2021 "Kwale North Dune PFS outcomes" available at 
https://baseresources.com.au/investors/announcements/.] 
 
Mining schedule 
 
Pursuant to the Bumamani PFS, four existing HMUs will be utilised instead of 
three (as is current mining practice at Kwale South Dune), two continuing to 
mine at Kwale South Dune and two at the pits the subject of the Bumamani PFS. 
After the transition to four HMUs, in both areas one HMU will operate at 800 
tph and one at 400 tph to give a total feed rate of 2400 tph, consistent with 
the present feed rate at Kwale South Dune.  HMUs are capable of mining at 
either 400 or 800 tph by operating either one or two high pressure monitors, 
each capable of 400 tph. 
 
A shutdown of mining operations and the wet concentrator plant is scheduled for 
February 2023 to relocate HMUs and associated pumping infrastructure, after 
which mining at the Bumamani pit will commence.  Following depletion of the 
Bumamani pit in July 2023, all mining equipment will relocate to P199 while 
mining continues at Kwale South Dune.  A mine move at Kwale South Dune is 
scheduled for March 2024, during which mining operations will continue at the 
P199 section.  During planned shuts for the relocation of mining operations, 
the feed rate of mining units that remain operational will be maximised. 
 
For a chart summarising the mining schedule assumed for the Bumamani PFS, 
compared to the mine plan if the Bumamani Project does not proceed and figures 
depicting the planned HMU and tailings schedules for the Bumamani PFS, refer to 
the full PDF version of this announcement available from the Company's website: 
https://baseresources.com.au/investors/announcements/ . 
 
ENDS. 
 
For further information contact: 
 
James Fuller, Manager Communications and Investor  UK Media Relations 
Relations 
 
Base Resources                                     Tavistock Communications 
 
Tel: +61 (8) 9413 7426                             Jos Simson and Gareth Tredway 
 
Mobile: +61 (0) 488 093 763                        Tel: +44 (0) 207 920 3150 
 
Email: jfuller@baseresources.com.au 
 
About Base Resources 
 
Base Resources is an Australian based, African focused, mineral sands producer 
and developer with a track record of project delivery and operational 
performance.  The company operates the established Kwale Operations in Kenya 
and is developing the Toliara Project in Madagascar.  Base Resources is an ASX 
and AIM listed company.  Further details about Base Resources are available at 
www.baseresources.com.au 
 
PRINCIPAL & REGISTERED OFFICE 
Level 3, 46 Colin Street 
West Perth, Western Australia, 6005 
Email:  info@baseresources.com.au 
Phone: +61 (0)8 9413 7400 
Fax: +61 (0)8 9322 8912 
 
NOMINATED ADVISOR 
RFC Ambrian Limited 
Stephen Allen 
Phone: +61 (0)8 9480 2500 
 
JOINT BROKER 
Berenberg 
Matthew Armitt / Detlir Elezi 
Phone: +44 20 3207 7800 
 
JOINT BROKER 
Canaccord Genuity 
Raj Khatri / James Asensio / Patrick Dolaghan 
Phone: +44 20 7523 8000 
 
 
 
 
END
(END) Dow Jones Newswires
September 03, 2021 04:40 ET (08:40 GMT)
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