Minergy Spent pot lining Technology The technology is comprised of a series of integrated processes: material sizing process Carbon Burn out process to generate electricity and remove carbon from SPLl Fluoride recovery process Melting and glass production process (including oxygen production subsystem) and production of glass aggregate Emissions treatment and sulphuric acid recovery process (for use in production of marketable materials) process to produce marketable materials from fluoride recovery process process produces excess electricity natural gas required to power melter very low emissions

1. Environmentally efficient processing of complex and hazardous wastes
www.minergy.com

2. BACKGROUND
Minergy processes high volume, complex/
hazarous waste in a highly efficient and
environmentally sensitive manner
Patented, award winning, proven vitrification
technology for treatment of multiple waste
streams
Founded in1993, originally as a subsidiary of
Wisconsin Energy
Constructed four fully functional plants
Minergy plants are compact, have low
emissions, and the only by-product is inert
glass aggregate
Three versions of Minergy technology
developed to address a wide range of
waste streams
Over €75M(US$100M) in aggregate R&D
investment to date
Technology has been endorsed by the US EPA
and 3 of the largest environmental services
companies in the world
Minergy has developed a number of unique
solutions for specific industries
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3. Minergy vitrification technology
Vitrification is a process that melts materials with
heat and fusion
Feedstocks may include inorganic and organic
materials
Organic fraction is a renewable fuel source
Inorganic fraction transforms into inert,
beneficially reusale glass aggregate.
Glass aggregate byproduct approved for use in:
Asphalt pavements
Pozzolan substitute (cement extender)
Floor tiles
Utility trench fill
Roofing shingles
Blasting grit
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4. SPENT POT LINING Minergy status
Aluminum production is a continuous process where different materials are
molted within a refractory lined ‘pot’
In 2011 Minergy developed a patent pending system for the treatment of SPL
SPL is produced as a waste stream from this process
The Minergy design is highly innovative and combines a number of proven tech-
nologies (including Minergy’s Glass Furnace technology) into a single integrated
Approximately 500,000 tonnes of SPL produced each year, and volumes are plant
steadily increasing
Multiple by-products are produced by the treatment process, which can be resold
SPL is expensive to treat, with no sustainable solution to-date commercially – some at a significantly value
Much SPL is being stockpiled around the world in hope that a viable long term The Minergy design has been reviewed in detail by one of the largest
solution will be developed in the future environmental services companies in the world
Stockpiled SPL could well total more than 4M tonnes Regulatory conditions globally continue to evolve to support deployment of
Minergy technology for the treatment of SPL.
Substantial R&D has been invested over the years to develop a long term
solution by numerous governmental and industry parties, without success Currently about 50% of world-wide SPL producers (i.e. 250,000 tonne) can justify a
Minergy solution
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5. Minergy
Spent Pot Lining
Technology
Technology is comprised of a series of integrated processes:
Material sizing process
Carbon Burn Out process to generate electricity and remove carbon
from SPL
Flouride recovery process
Melting and glass production process (including oxygen production
subsystem) and production of glass aggregate
Emissions treatment and sulfuric acid recovery process (for use in
production of marketable materials)
Process to produce marketable materials from flouride recovery
process
Process produces excess electricity
Natural gas required to power melter
Very low emissions
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6. Minergy SPL
process outputs
and economics
A typical 30,000 tonne per year SPL treatment plant produces:
19,000 tonnes of inert, reusable glass aggregate
5,600 tonnes of resalable materials (e.g. cryolite)
Revenue can be generated from the sale of outputs from
the process
Minergy SPL Plants can treat 25,000 – 100,00 tonnes of SPL per year
Smaller plants can be built subject to financial justification
Plant investment will typically range from:
€30M – 90M
US$40M – 120M
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7. CONTACT US:
Minergy Corporation Limited
Phone: +44 207 617 7424
Fax: +44 207 117 4460
Email: contact@minergy.com
Environmentally efficient processing of complex and hazardous wastes
www.minergy.com
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