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Re: News Releases - Monday, November 10, 2008
BacTech Provides Test Work Update on Castle Mine Tailings
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Toronto, Canada, November 10, 2008 - BacTech Mining Corporation
("BacTech" or the "Company", TSX.V: BM) is pleased to provide a
metallurgical test work update on the 500 kg sample of tailings
material taken from the Castle Mine tailings deposit located in
Gowganda near Cobalt, Ontario. The Castle Mine tailings are owned by
BacTech's partner on the project, Gold Bullion Development Corp.
(TSX.V: GBB). The test work is being conducted at SGS Lakefield
Metallurgical Laboratory in Lakefield, Ontario.
The objective of the metallurgical test work is to test the effects of
using both gravity and flotation techniques to upgrade the tailings to
produce concentrates suitable for bioleach test work. The techniques
may be used individually or in combination. The initial study is
focused on the use of gravity techniques, and investigations into
flotation have yet to be undertaken. It should be noted that these are
initial results and increased recoveries should be obtainable with more
detailed investigations.
In this initial test phase, a low gravity concentration technique was
trialed, with the objective of recovering coarser silver values. The
use of flotation will then be investigated to acquire additional
silver, together with the cobalt and nickel, which may be more directly
associated with the sulphides. In addition, we achieved a high
retention of the arsenic in the concentrate, which was one of the main
objectives of the test work. BacTech's patented bioleaching technology
is a proven and effective technology for producing a stable form of
arsenic, which makes this both an environmental reclamation project and
a metal recovery project. The technology is able to process
concentrates with high arsenic values which would normally be
considered unacceptable for conventional processing methods such as
smelting or roasting.
The early results from test work of the tailings using only low gravity
methods are encouraging, with higher than anticipated cobalt and
arsenic values reporting to a concentrate. The recovery and assay
results from initial tests, in which different percentages of feed
reported to the concentrate (varying mass pull), are given below.
Recovery of elements to concentrate at 2% mass pull using gravity
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Ag Co Ni As S
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26.2% 47.6% 22.8% 64.1% 12.2%
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Concentrate assay at 2% mass pull
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Ag Co Ni As S
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134 oz 2.63% 0.25% 14.2% 0.2%
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Recovery of elements to concentrate at 20% mass pull using gravity
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Ag Co Ni As S
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55.2% 63.2% 40% 80.5% 28.7%
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Concentrate assay at 20% mass pull
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Ag Co Ni As S
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28.7 oz 0.36% 0.05% 1.81% 0.05%
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These results, preliminary in nature, are encouraging. Investigations
are continuing in which further gravity work is planned. Flotation work
will be undertaken to further increase the recovery of silver, cobalt,
and nickel and results will be released when received.
It is anticipated that detailed bioleach test work on the concentrates
from the Castle Mine tailings will commence in late December. Some
early bioleach work has already begun at SGS Lakefield Oretest in
Perth, Australia, in order to adapt the bacteria to the type of
mineralogy of the Cobalt tailings.
Technical and scientific data in this news release has been verified by
Dr. Paul Miller, the Company's Vice President of Technology and
Engineering. Dr. Miller is a chartered engineer and a member of the
Institute for Mining and Metallurgy, London, England, and is a
qualified person for the purposes of National Instrument 43-101. Dr.
Miller has reviewed and approved the contents of this news release.
BACTECH PROFILE
BacTech has developed and patented bacterial oxidation technology for
the treatment of refractory ores and concentrates to enhance the
recovery of gold, silver and base metals. BacTech has successfully
commissioned three bioleach plants for gold and demonstrated its
technology in the selective recovery of base metals from complex
sulphide concentrates in a joint project with Industrias Pe�oles de
C.V. of Mexico that was completed in 2001. The Company's focus is the
acquisition of equity positions in projects amenable to bioleaching.
The Company recently signed an agreement to acquire Yamana Gold Inc.'s
33% interest in two refractory gold deposits in Papua New Guinea.
Prospective and current shareholders are invited to join the Company's
official investment forum exclusively at www.pinnacledigest.com. The
forum allows for investor controlled discussion, questions, third party
reports and articles, and progressive feedback from other shareholders
and investors. See http://www.pinnacledigest.com/company/bm%Aca. Also,
visit www.bactech.com for ongoing updates and to have your name added
to our mailing list.
CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION
Except for statements of historical fact relating to the Company,
certain information contained herein constitutes "forward-looking
statements". Forward-looking statements are frequently characterized
by words such as "plan," "expect," "project," "intend," "believe,"
"anticipate" and other similar words, or statements that certain events
or conditions "may" or "will" occur.
Forward-looking statements are based on the opinions and estimates of
management at the date the statements are made, and are subject to a
variety of risks and uncertainties and other factors that could cause
actual events or results to differ materially from those projected in
the forward-looking statements. These factors include the inherent
risks involved in the exploration and development of mineral
properties, the uncertainties involved in interpreting drilling results
and other ecological data, fluctuating metal prices, the possibility of
project cost overruns or unanticipated costs and expenses,
uncertainties relating to the availability and costs of financing
needed in the future and other factors described in the section
entitled "Risks" in the Company's Management Discussion and Analysis
for the Year Ended December 31, 2007. Circumstances or management's
estimates or opinions could change. The reader is cautioned not to
place undue reliance on forward-looking statements.
- 30 -
For further information contact:
Ross Orr, President & CEO, 416-813-0303 ext 222
Investor Relations:
Pierre Anglos 1-800-436-2027 Email: capitalgainsco@shaw.ca
Shares outstanding 60,107,206
The TSX Venture Exchange has not reviewed and does not accept any
responsibility for the adequacy or accuracy of this release
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Copyright (c) 2008 BACTECH MINING CORPORATION (BM) All rights
reserved. For more information visit our website at
http://www.bactech.com/ or send mailto:info@bactech.com
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