Hudson Reports Positive Leaching Test Results for the Production of Waste Free Alumina in EU Funded Program
August 04 2021 - 8:35AM
HUDSON RESOURCES INC. (“
Hudson” or the
“
Company”) (TSX Venture Exchange “HUD”; OTC
“HUDRF”) is pleased to announce results of independent testwork
conducted on anorthosite from the White Mountain mine in Greenland.
The testwork, conducted in Norway, confirms that anorthosite from
the White Mountain mine gives very high leach recoveries with short
leaching times for aluminum and calcium dissolution. This is the
key first step in the production of a waste-free smelter grade
“Green Alumina” product for the aluminum industry. This work
confirms Hudson’s earlier work completed at SGS Lakefield and
current testwork being undertaken at KPM in Kingston, Ontario (see
NR2021-03). Hudson’s objective is to demonstrate an economic
process to produce a “Green Alumina” product from anorthosite.
Hudson has a 31.1% equity interest in the White Mountain
anorthosite mine and rights to acquire 100%.
The testwork was conducted by the Institute for
Energy Technology (IFE) in Norway as part of its AlSiCal project,
and was funded through the European Union’s (EU) Horizon 2020
Research and Innovation program under grant No 820911. For
more information about IFE please see https://ife.no/en/ and for
information on AlSiCal please refer to:
https://www.alsical.eu/.
Hudson provided several samples of anorthosite
for the testwork including a minus 250 micrometer product and
coarse (+100mm) rock samples, crushed and sieved down to 77-760
microns for testing. The IFE determined that the identified samples
submitted by Hudson were “of high quality” in the context of the
AlSiCal project. Key results are as follows:
- Both the aluminum and calcium are leached simultaneously
- Leaching of between 87-97% wt% (weight percent) in the first
two hours
- Leaching of 93-100 wt% in four hours
- Variability within range is attributed to different particle
sizes and/or the anorthosites natural heterogeneity
Results were confirmed by ICP-MS analysis and XRF analysis.
Testwork on the two samples demonstrated what
IFE considered as “fast leaching” characteristics and a “high total
dissolution yield (being 100% the theoretical, calculated maximum
dissolution yield based on the available analyses)”.
The AlSiCal project objective is to secure for
the EU, a sustainable process for the production of alumina, silica
and precipitated calcium carbonate by researching, developing and
de-risking ground-breaking technology aiming for ZERO Bauxite
residue and ZERO CO2 emissions during their co-production.Two
leaching tests were performed by IFE, which included the following
steps:
- Mixing of anorthosite with 20 wt%
Hydrochloric acid (HCl) at 140 degrees C
- Cooling of the final reaction
mixture
- Separation of liquid and solid
fractions by centrifugation and decanting
- Washing of solid fractions and
drying
Jim Cambon, President commented: “The EU funded
testwork conducted by IFE and AlSiCal independently confirms an
efficient and straightforward leaching process of aluminum and
calcium from the White Mountain anorthosite. This represents a key
step in the production of a waste-free “Green Alumina” product and
offers a direct replacement to bauxite which creates almost four
tonnes of waste for every tonne of aluminum produced. The time is
right for the production of a truly green aluminum in which
anorthosite is a key solution.”
In addition to its interest in the White
Mountain anorthosite operation, Hudson owns 100% of the Sarfartoq
rare earth element (“REE”) project and the high-grade Nukittooq
niobium-tantalum project located on the Sarfartoq exploration
license. The Sarfartoq REE project has a 43-101 indicated and
inferred resource outlining 35,000 tonnes of neodymium oxide plus
praseodymium oxide, the two key components in permanent magnets
driving the green revolution. There is significant potential to
expand this REE resource, while the Nukittooq project has some of
the highest reported niobium assays in the industry (see
NR2020-15).
J.R. Goode, P. Eng., is a Qualified Person, as defined by
National Instrument 43-101, and reviewed the preparation of the
metallurgical and technical information in this press release.
ON BEHALF OF THE BOARD OF DIRECTORS
“Jim Cambon”
President and Director
For further information:Ph:
604-628-5002
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