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APT

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Share Name Share Symbol Market Type
TSXV:APT TSX Venture Common Stock
  Price Change % Change Share Price Bid Price Offer Price High Price Low Price Open Price Shares Traded Last Trade
  0.00 0.00% 0 -

Adex Provides Progress Report on Metallurgical Programs for Optimizing Metal Production at Mount Pleasant

20/07/2009 2:06pm

Marketwired Canada


Adex Mining Inc. ("Adex" or the "Company") (TSX VENTURE:ADE) is pleased to
provide a progress report on metallurgical test programs that were carried out
by the Company in relation to its Mount Pleasant Mine Property ("Mount Pleasant"
or the "Property"). The results of the metallurgical test programs provide the
Company with valuable information required to develop an optimal commercial
extraction and recovery process for the principal metals hosted at Mount
Pleasant, being tungsten, molybdenum, tin and indium. This information will also
help guide the Company in developing production options for the Property.


GRAVITY-FLOTATION SEPARATION TEST PROGRAM

SGS Lakefield Research Europe Ltd. of Cornwall, United Kingdom ("SGS Europe")
has completed initial bench scale testing of a multi-stage grinding and
gravity-flotation separation process (the "Gravity Process"). The Gravity
Process is being considered by the Company as an innovative approach to
improving the grade and recovery (by pre-concentration) of the metals hosted at
Mount Pleasant's two mineralized zones - being the tungsten-molybdenum bearing
Fire Tower Zone (the "FTZ") and the tin-indium-zinc bearing North Zone (the
"NZ").


The Gravity process was designed by Thibault & Associates Inc. of Fredericton,
New Brunswick and was tested using bench scale techniques by SGS Europe to
quantify its metallurgical performance for the production of tungsten
concentrate from the FTZ deposit. The Company is evaluating the use of tungsten
concentrate from the Gravity Process and a hydrometallurgical Process for
possible production of ammonium paratungstate ("APT"). APT is considered the
primary intermediate for the production of tungsten carbide which is used
primarily for hard steel applications.


The Gravity Process was bench scale tested for conceptual design of the
concentrator. The results of the bench scale test were also used to model the
performance of the proposed flowsheet. Bench scale batch test results combined
with computer modeling of a fully integrated flowsheet for continuous
concentrate production has indicated that a recovery of 83.3% for tungsten with
a concentrate grade of 25.6% tungsten tri-oxide (WO3) may be achieved. A
continuous pilot test of the proposed Gravity Process will be required to verify
the overall grade and recovery of processing the ore from the FTZ.


The Gravity Process tested on ore samples from the FTZ was also used to assess
tin concentrate production from the NZ deposit. The results of the Gravity
Process test program indicate that modifications to the flowsheet developed for
tungsten production will be required for the production of tin concentrate.


TUNGSTEN GRAVITY CONCENTRATE LEACHING TEST PROGRAM

Development of the Gravity Process: a representative sample of ore from the FTZ
zone was processed by the Minerals Engineering Centre of Dalhousie University in
Halifax, Nova Scotia to produce a low grade tungsten concentrate.


Research and Productivity Council ("RPC") of Fredericton, New Brunswick then
completed a bench scale test program to improve on the quality of the gravity
concentrate for APT production. Bench scale flotation tests on the low grade
gravity concentrate achieved up to 70% reduction of the arsenic bearing minerals
prior to tungsten leaching, thereby improving feedstock for APT production.


The tungsten leach is the initial step of the APT hydrometallurgical process
developed by Thibault & Associates Inc. and the test program was conducted by
RPC to assess the technical viability of the proposed leaching process. Two
stage atmospheric bake-leach and single stage autoclave leach tests were carried
out on the arsenic (arsenopyrite, loellingite) flotation tails (tungsten
concentrate) to assess processing alternatives for the extraction of tungsten
from low grade concentrates. The results of the leach test program indicate a
selective process for optimum tungsten extraction (using an autoclave leach) in
the range of 95% to 99% may be achieved based on bench scale batch testing.


The arsenic flotation and tungsten leach tests will assist the Company in the
design of a hydrometallurgical process for the production of APT from a gravity
concentrate. Continuous piloting of the leach and solution purification unit
operations will be required to confirm the purity of the APT.


MINERALOGY ASSESSMENT PROGRAM

SGS Lakefield Research Limited of Lakefield, Ontario ("SGS Lakefield") has
completed a detailed mineralogy assessment (the "Mineralogy Assessment") of ore
from both the FTZ and NZ. The initial results of the Mineralogy Assessment,
which were first reported in the Company's press release dated December 23,
2008, provide information on grain size for various minerals, liberation or
grind requirement and theoretical grade-recovery relationships for the
beneficiation of various metals. The results of the Mineralogy Assessment also
suggest that sphalerite is the predominant host of indium at Mount Pleasant.


The foregoing series of metallurgical programs that have been completed by the
Company at its contract laboratory facilities, being SGS Lakefield, SGS Europe,
Dalhousie University and RPC, were necessary in order for the Company to move
forward in developing various production options for the Property. In addition,
the information obtained from the metallurgical programs will assist the Company
in designing and developing a future pilot plant program which may lead to
commercial-level production of tungsten, molybdenum, tin and indium at Mount
Pleasant.


SGS Lakefield and SGS Europe are leading mineralogy research and metallurgical
testing firms. RPC is an independent R&D firm situated in Fredericton, New
Brunswick. Thibault & Associates Inc. - Applied Process Chemical Engineering of
Fredericton, New Brunswick serves as an independent consulting firm to the
Company with respect to Mount Pleasant metallurgical and environmental process
development, design and planning.


QUALIFIED PERSON:

Mr. J. Dean Thibault, M.Sc., P. Eng., is the Senior Process Chemical Engineer of
Thibault & Associates Inc., and is an independent qualified person as defined by
National Instrument 43-101. Mr. Thibault has managed the metallurgical test
programs and supervised the preparation of the technical information contained
in this press release in compliance with National Instrument 43-101.


ABOUT ADEX:

Adex Mining Inc. is a Canadian junior mining company with an experienced
management team. The Company is focused on developing its flagship Mount
Pleasant Mine Property, a multi-metal project that is host to promising
tungsten-molybdenum and tin-indium-zinc-copper mineralization. Located in
Charlotte County, New Brunswick, Mount Pleasant is situated approximately 80
kilometres south of Fredericton, the provincial capital, and is 65 kilometres
from the United States border. The common shares of Adex trade on the TSX
Venture Exchange under the stock symbol "ADE".


FORWARD-LOOKING STATEMENTS

Certain statements in this press release may constitute "forward-looking"
statements which involve known and unknown risks, uncertainties and other
factors which may cause actual results, performance or achievements of Adex, its
subsidiary or the industry in which they operate to be materially different from
any future results, performance or achievements expressed or implied by such
forward-looking statements. When used in this press release, the words
"estimate", "believe", "anticipate", "intend", "expect", "plan", "may",
"should", "will", the negative thereof or other variations thereon or comparable
terminology are intended to identify forward-looking statements. Such statements
reflect the current expectations of the management of Adex with respect to
future events based on currently available information and are subject to risks
and uncertainties that could cause actual results, performance or achievements
to differ materially from those expressed or implied by those forward-looking
statements. These risks and uncertainties are detailed from time to time,
including, without limitation, under the heading "Risk Factors", in reports
filed by Adex with the Alberta, British Columbia and Ontario Securities
Commissions which are available at www.sedar.com and to which readers of this
press release are referred for additional information concerning Adex, its
prospects and the risks and uncertainties relating to Adex and its prospects.
New risk factors may arise from time to time and it is not possible for
management to predict all of those risk factors or the extent to which any
factor or combination of factors may cause actual results, performance and
achievements of Adex to be materially different from those contained in
forward-looking statements. Although the forward-looking statements contained in
this press release are based upon what management believes to be reasonable
assumptions, Adex cannot assure investors that actual results will be consistent
with these forward-looking statements. Given these risks and uncertainties,
investors should not place undue reliance on forward-looking statements as a
prediction of actual results.


The forward-looking information contained in this press release is current only
as of the date of the press release. Adex does not undertake or assume any
obligation to release publicly any revisions to these forward-looking statements
to reflect events or circumstances after the date hereof or to reflect the
occurrence of unanticipated events, except as required by law.


No securities commission or regulatory authority has approved or disapproved the
contents of this press release.


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