Belo Sun Reports Positive Results from the Metallurgical Test Work Program for
Volta Grande with Average Recoveries of 94%
TORONTO, ONTARIO -- (Marketwire) -- 02/21/13 -- Belo Sun Mining Corp.
(TSX:BSX) has received positive results from the ongoing
metallurgical test work program for its 100% owned Volta Grande Gold
Project located in Para State, Brazil. The metallurgical test work
program returned an average recovery of 94%. The program was focused
on the diorite gold-bearing material of the Grota Seca (GS) and Ouro
Verde (OV) ore bodies which make up the Volta Grande Project. The
purpose of the metallurgical test work program was to complete
various grind determination and gold recovery tests in order to
determine the best process flow sheet and economic parameters for use
in the upcoming feasibility studies. The metallurgical test work
program was designed to test the variability of GS and OV ores under
different process conditions. Samples collected for this
metallurgical test work program were selected from drill core
For the gold recovery tests, medium and high grade composites were
prepared with varying gold head grades from approximately 1 g/t to 4
g/t from each of the GS and OV ore bodies.
-- The following tests made up the gold recovery section of the
metallurgical test work program:
-- Chemical characterization, size distribution and DRX analysis of the
-- Preg-robbing tests.
-- Gravity separation tests using centrifugal concentrators.
-- Leaching tests under different conditions including grind size,
slurry density, cyanide concentration and dissolved oxygen
-- The highlights of the gold recovery tests included:
-- Between 25% to 50% of the gold can be recovered in a gravity
concentration step prior to leaching.
-- The optimal leaching conditions for the OV and GS composites were a
grind size of 80% passing 75 micrometres, slurry density of 50% by
weight, 0.5 g/L NaCN concentration, 10 ppm dissolved oxygen
concentration at a pH of 10.5.
-- For the OV ore, with a gold head grade varying between 1.17 g/t to
3.80 g/t, with an average gold recovery of 94%.
-- For the GS ore, with a gold head grade varying between 1.06 g/t to
3.90 g/t, with an average gold recovery of 94%.
-- The OV and GS ores are amenable to conventional gravity and gold
leaching processes including leach / CIP or CIL.
A series of nine composites were collected for the grinding test
work. These composites were collected such that they represented the
main lithology groups found in the OV and GS ore bodies.
-- The following tests made up the grind determination section of the
metallurgical test work program:
-- SAG Mill Comminution Test (DWi and A x b).
-- SAG Power Index Test (SPI).
-- Bond Abrasion Index Test (Ai).
-- Rod Bond Work Index Test (RMWi).
-- Bond Ball Work Index Test (BMWi).
-- The highlights of the grind determination tests included the following:
-- The average results obtained from the grinding determination tests
were DWi = 10.2 kWh/m3, A x b = 27.8, SPI = 163.2 minutes, Ai =
0.39, RMWi = 14.48 kWh/st and the BMWi = 14.01 kWh/st.
-- These results indicate that the OV and GS ores are amenable to
conventional primary crushing, SAG and ball milling.
Omar Antunes, Metallurgy Manager for the Volta Grande Project,
commented: "These metallurgical results are confirming previous test
work, with excellent gold recoveries for our planned processing plant
as well as confirming a simple, conventional, robust, environmentally
safe and straightforward low cost process route to support
feasibility studies. We are pleased to be able to report such
excellent results for both deposits."
Ian Pritchard, Chief Operating Officer of Belo Sun, said "The
testwork results confirm earlier work and provides Belo Sun with the
parameters for finalising the plant design as we move towards the
completion of the feasibility studies."
The results reported in this news release are from test work
performed in Santiago Chile by SGS Minerals S.A, Chile. The test work
was directly supervised by Sebastian Bravo, process supervisor and by
Catherine Souza, head engineer in charge of the Volta Grande Project.
SGS Technical Manager Dr. Heriban Soto, coordinated the laboratory
The test results reported have been reviewed by Omar Antunes,
Metallurgy Manager for the Volta Grande Project.
David Evans, P.Eng., an independent consultant to the Company and a
Qualified Person under NI 43-101, has reviewed the scientific and
technical information in this release.
About the Company
Belo Sun Mining Corp. is a Canadian-based mineral exploration company
with a portfolio of properties focused on gold in Brazil. Belo Sun's
primary focus is on advancing and expanding its 100% owned Volta
Grande Gold Project, located in Para State. Belo Sun trades on the
Toronto Stock Exchange under the symbol "BSX". For more information
about Belo Sun please visit www.belosun.com.
Cautionary Statement on Forward Looking Information
This press release contains "forward-looking information" within the
meaning of applicable Canadian securities legislation.
Forward-looking information includes, without limitation, statements
regarding the impact of these metallurgical results on the Company
and its understanding of the project; statements with respect to the
development potential and timetable of the project; the estimation of
mineral resources; realization of mineral resource estimates; the
timing and amount of estimated future exploration; costs of future
activities; capital and operating expenditures; success of
exploration activities; currency exchange rates; government
regulation of mining operations; and environmental risks. 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". Forward-looking
information is subject to known and unknown risks, uncertainties and
other factors that may cause t
he actual results, level of activity,
performance or achievements of the Company to be materially different
from those expressed or implied by such forward-looking information,
including risks inherent in the mining industry and risks described
in the public disclosure of the Company which is available under the
profile of the Company on SEDAR at www.sedar.com and on the Company's
website at www.belosun.com. Although the Company has attempted to
identify important factors that could cause actual results to differ
materially from those contained in forward-looking information, there
may be other factors that cause results not to be as anticipated,
estimated or intended. There can be no assurance that such
information will prove to be accurate, as actual results and future
events could differ materially from those anticipated in such
statements. Accordingly, readers should not place undue reliance on
forward-looking information. The Company does not undertake to update
any forward-looking information, except in accordance with applicable
Belo Sun Mining Corp.
President and CEO
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