Monument Completes Independent Flotation Testwork
P a g e 1 | 6
July 6, 2021 News Release Release #18-2021
Monument Completes Independent Flotation Testwork
Vancouver, B.C., July 6, 2021, Monument Mining Limited (TSX-V: MMY and FSE: D7Q1) ( "Monument" or
the "Company") is pleased to announce that the independent flotation testwork undertaken at Bureau
Veritas Laboratory (“BV”) in Perth has successfully replicated the positive results achieved by the on-site
metallurgical laboratory to produce a marketable gold concentrate at the Selinsing Gold Mine.
CEO and President Cathy Zhai commented: “We are very pleased with the test results that are a milestone
step in achieving a sustainable cash supply from our Selinsing gold sulphide inventory by the sale of a
sulphide concentrate produced through the planned flotation plant to third parties. The Phase II plant
upgrade may follow to construct a BIOX-leaching circuit if deemed economically viable to treat both the
Selinsing concentrates and third party concentrates on-site in order to further enhance the revenue level.
Our new business model of expan ding operations into treating third parties concentrates through a
planned BIOX®-leaching circuit continues to be assessed.”
She further added: “We have noted that the recent announcements of tighter Chinese import restriction
for the arsenic levels in gold concentrates imply that a number of producers of complex gold concentrates
that currently sel l into China will be looking for new off -take partners. Consequentially Selinsing’s
proposed BIOX® plant could be their new home.”
Flotation Testwork Results Highlights
Gold concentrate produced from fresh sulphide ore contains an average 34g/t of gold from BV
testwork, compared to 33.1g/t of gold from the on-site Selinsing testwork;
Gold concentrate produced from transition sulphide ore contains an average 42.5g/t of gold from
BV testwork compared to 31.7g/t of gold from the on-site Selinsing testwork;
The arsenic (“As)” contained in gold concentrates was achieved at an average of 5.1% for fresh
and 7.0% for transition ores close to the 8% limit that initially set for the testwork program . It
can be lowered to 3.5% through concentrate blending.
Final concentrate grades showed elevated antimony (“Sb”) grades in the fresh material (5.7 –
13.3% Sb), but less than 0.2% Sb in the transition ores.
Orway Mineral Con sultants (“OMC”) was engaged by the Company to modify the flotation conceptual
engineering design that was reported in the Snowden feasibility study in February 2019, in order to
produce gold concentrates as a final product for sale instead of a mid-product for further bio -leach
treatment to accommodate a two stage approach Sulphide treatment plant expansion strategy.
The independent testwork was carried out from February to May 2021 in Perth, Australia through Bureau
Veritas Laboratory (“BV Lab”) under OMC’s supervision. The aim of this testwork was to independently
verify the process parameters developed by the on-site laboratory through extensive testwork. Based on
P a g e 2 | 6
the test results, the optimized flotation conceptual engineering design was completed by OMC in June
2021 under the “Sulphide Flotation Circuit Design - Selinsing Gold Project”, including flotation testwork
parameters, process design criteria, circuit modelling, engineering design brief and consumables
estimates.
Flotation Testwork Parameters
Diamond drilling was conducted at Buffalo Reef pits BRC2, BRC3, BRC4 and BR North to provide samples.
BV Lab testwork was designed to ensure repeatability of the on-site testwork and all flotation tests were
carried out in duplicate.
The BV Lab testwork has proved that the Selinsing onsite laboratory test results are repeatable in a
commercial lab for Fresh and Transition ore (Table 1. Summary of the BV Lab results ), and the onsite
laboratory recovery numbers can be used by OMC with reasonable confidence for engineering design
(refer to news release dated April 27, 2021 “Monument Commences Flotation Plant Work at Selinsing”).
Table 1: Summary of the BV Lab results
Parameter
Fresh Average
Transition Average
Site
BV
Site
BV
Mass Pull (%)
Au recovery (%)
Au grade (g/t)
As (%)
5.1
94.3
33.1
4.1
92.6
34.0
5.1
4.5
81.8
31.7
3.3
80.0
42.5
7.0
- The fresh ore results report gold concentrate at an average 34 g/t in line with what was reported
at site in the 30 -35 g/t range at a recovery in the low to mid -90s. The mass pulls were slightly
lower.
- The transition ore performed very well in the BV Lab, with an average concentrate grade of 4 2.5
g/t being produced from the two rougher cleaner tests being > 10 g/t higher than the results
reported from site. This is linked with smaller mass pulls as the overall gold recoveries were fairly
similar between the two labs (80% versus 82%).
Testwork results comparison between the Selinsing on-site lab and the BV Lab are summarized in Table
2: Testwork comparison between Selinsing on-site and BV Perth flotation:
- Rougher flotation concentrate was collected in six fractions. The first rougher concentrate was
consistently high grade and required no cleaning. Rougher concentrates 2-6 were lower grade and
subjected to three stages of cleaning. Third cleaner concentrate was combined with the first
rougher concentrate to make the final concentrate.
- A minimum of two cleaner stages, with the ability to direct the material f or a third stage in the
event of poor Au grades, was recommended for both ore types based on the BV Lab results.
Adjusting the scheme to increase the mass pull to ensure the gold grade remains within 30-35 g/t
should limit the need to operate the third stage.
- Recirculating the cleaner tails as part of the eventual closed-circuit operation will further minimize
the gold lost to tails. The recovery figures from the closed-circuit mass balance will be used as the
basis for the circuit design.
P a g e 3 | 6
Table 2: Testwork comparison between Selinsing on-site and BV Perth flotation
Variability Testwork
The Selinsing on-site lab also tested the flotation scheme on the individual ore zones, which allowed for
benchmarking of both the site and BV Lab composite results against the projected weighted average. The
comparison is below in Table 3: Final Concentrates Results.
There was better precision when comparing the calculated weighted average data against both the on -
site lab and the BV Lab composite results for the fresh testwork. When benchmarked against the
calculated weighted average, the transition ore concentrate grades reported by BV Lab were consistently
higher and mass pulls lower than the site lab data respectively.
Fresh Average Transition Average
Site BV Site BV
Au Feed Grade (g/t)
Calculated 1.88 1.76 1.74 1.79
Measured 1.93 1.83 1.70 1.73
Rougher 1 Concentrate
Mass Pull (%) 4.0 3.5 3.8 2.6
Au (g/t) 37.0 38.4 31.4 44.9
Au Recovery (%) 83.8 76.5 69.0 63.7
S (%) 21.4 26.0 14.1 23.0
As (%) 7.0 7.4
Cleaner 3 Concentrate
Au (g/t) 18.1 19.0 32.4 39.7
S (%) 14.4 17.8 12.6 16.4
Open Circuit Flotation
Testwork Recovery
Mass Pull (%) 5.1 4.1 4.5 3.3
Au (%) 94.3 92.6 81.8 80.0
S (%) 86.1 87.6 88.4 88.3
Final Concentrate Grades
Au (g/t) 33.1 34.0 31.7 42.5
S (%) 20.0 23.6 14.1 21.8
As (%) 5.1 7.0
P a g e 4 | 6
Table 3: Final Concentrates Results
Ore Source
Final Concentrate Results
Au grade (g/t) Mass Pull (%) Recovery (%)
Fresh
BRC2 40.35 5.15 92.34
BRC3 33.78 4.53 89.07
BRC4 31.90 5.02 94.69
BRN 35.07 4.55 94.70
Zone Weighted Average 35.29 4.94 92.52
Site Composite 33.10 5.05 94.32
BV Lab Composite
Average 33.96 4.06 92.59
Transition
BRC2 40.61 4.89 82.02
BRC3 33.66 3.22 69.70
BRC4 32.90 2.59 74.80
BRN N/A N/A N/A
Zone Weighted Average 36.31 3.64 76.30
Site Composite Average 31.65 4.49 81.80
BV Lab Composite
Average 42.54 3.33 79.96
Process Plant Engineering Design
OMC completed the process plant design in early June 2021, and has submitted the process engineering
design including the process design criteria, major equipment summary, flowsheet, mass balance and
consumables estimate s. The battery limits for the Selinsing Stage 1 sulphide flotation circuit are the
primary mill feed conveyor, t he concentrate storage facility and the tails thickener underflow pump
discharge as shown in Figure 1: Proposed Flotation Circuit Configuration. The process design has indicated
that 6 x 30m 3 cells for Rougher, 2 x 20m 3 cells for Cleaner 1, 2 x 4.3m 3 cells for Cleaner 2 and 2 x 0.5m 3
cells for Cleaner 3 are to be used.
Further testwork was recommended by OMC to consider, including:
- Confirmatory locked cycle testing to be done in parallel with the detailed design to ensure the
stage recovery approach is appropriate;
- The sizing of the thickening and filtration circuit to be further tested in a pilot plant stage to ensure
it is appropriate;
- Additional filtration testing on the transition concentrate produced.
P a g e 5 | 6
Figure 1: Proposed Flotation Circuit Configuration
The scientific and technical information in this press release has been prepared by Charlie Northfield,
B.Sc.(Hons), ACSM, of Monument Mining Limited; reviewed and approved by Fred Kock (FAusIMM),
Principal Metallurgist of Orway Mineral Consultants, Qualified Person as defined by NI43-101.
About Monument
Monument Mining Limited (TSX-V: MMY, FSE:D7Q1) is an established Canadian gold producer that owns
and operates the Selinsing Gold Mine in Malaysia. Its experienced management team is committed to
growth and is also advancing the Murchison Gold Project s comprising Burnakura, Gabanintha and
Tuckanarra (20% interest) in the Murchison area of Western Australia. The Company employs
approximately 200 people in both regions and is committed to the highest standards of environmental
management, social responsibility, and health and safety for its employees and neighboring communities.
Cathy Zhai, President and CEO
Monument Mining Limited
Suite 1580 -1100 Melville Street
Vancouver, BC V6E 4A6
FOR FURTHER INFORMATION visit the company web site at www.monumentmining.com or contact:
Richard Cushing, MMY Vancouver T: +1-604-638-1661 x102 [email protected]
P a g e 6 | 6
"Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies
of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release."
Forward-Looking Statement
This news release includes statements containing forward -looking information about Monument, its business and future plans
("forward-looking statements"). Forward-looking statements are statements that involve expectations, plans, objectives or future
events that are not historical facts and include the Company's plans with respect to its mineral projects and the timing and results
of proposed programs and events referred to in this news release. Generally, forward -looking information can be identified by
the use of forward -looking terminology such as "plans", "expects" or "does not expect", "is expected", "budget", "scheduled",
"estimates", "forecasts", "intends", "anticipates" or "does not anticipate", or "believes", or variations of such words and phrases
or state that certain actions, events or results "may", "could", "would", "might" or "will be taken", "occur" or "be achieved ". The
forward-looking statements in this news release are subject to various risks, uncertainties and other factors that could cause
actual results or achievements to differ materially from those expressed or implied by the forward-looking statements. These risks
and certain other factors include, without limitation: risks related to general business, economic, competitive, geopolitical and
social uncertainties; uncertainties regarding the results of current exploration activities; uncertainties in the progress an d timing
of development activities; foreign operations risks; other risks inherent in the mining industry and other risks described in the
management discussion and analysis of the Company and the technical reports on the Company's projects, all of which are
available under the profile of the Company on SEDAR at www.sedar.com. Material factors and assumptions used to develop
forward-looking statements in this news release include: expectations regarding the estimated cash cost per ounce of gold
production and the estimated cash flows which may be generated from the operations, general economic factors and other factors
that may be beyond the control of Monument; assumptions and expectations regarding the results of exploration on the
Company's projects; assumptions regarding the future price of gold of other minerals; the timing and amount of estimated future
production; the expected timing and results of development and exploration activities; costs of future activities; capital an d
operating expenditures; success of exploration activities; mining or processing issues; exchange rates; and all of the factors and
assumptions described in the management discussion and analysis of the Company and the technical reports on the Company's
projects, all of which are a vailable under the profile of the Company on SEDAR at www.sedar.com. Although the Company has
attempted to identify important factors that could cause actual results to differ materially from those contained in forward-looking
statements, there may be oth er factors that cause results not to be as anticipated, estimated or intended. There can be no
assurance that such statements will prove to be accurate, as actual results and future events could differ materially from th ose
anticipated in such statements. Accordingly, readers should not place undue reliance on forward -looking statements. The
Company does not undertake to update any forward-looking statements, except in accordance with applicable securities laws.