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Our Process . . .
Iron Oxide production begins when waste acid is pumped to a venturi
scrubber where it is concentrated by hot gases from the spray roaster. The
concentrated waste acid undergoes the following chemical reaction:
4FeCl2 + 4H2O + O2 → 2Fe2O3 + 8HCl
 Iron Oxide
is discharged from the bottom of the spray roaster while the hot HCl gases
leave from the top.
The hot HCl gases pass through the venturi scrubber, and flow to the
absorber. HCl is then absorbed preferentially in recirculated water from
the scrubber to produce recycled hydrochloric acid. Exhaust gases are
scrubbed before being discharged to the stack by the exhaust fan.
Normally, 1 - 1.5 pounds of iron oxide are produced from each gallon of
waste acid processed. Iron oxide is produced in the form of hollow
spherical granules, which when crushed, have sub-micron range primary particles.
American Iron Oxide Company (AMROX) is a joint venture partnership between
International Steel Services, Inc. (ISSI) and Marubeni
Corporation. AMROX specializes in acid recycling services, and the
production of various grades of iron oxide for use in ferrite and colorant
applications.
The first AMROX facility began providing acid recycling services in
Allenport, Pennsylvania, USA in September 1995. This AMROX facility
processes over 23 million gallons of waste acid per year, resulting in the
production of over 15,000 tons per year of iron oxide. This facility
incorporates a modified IROX / NKK purification system, enabling AMROX to
produce high purity iron oxide with SiO2 levels less
than 100 PPM. The facility produces a very consistent quality iron oxide
product since waste pickle liquor as feedstock is received from only two
steel mill sources.
AMROX has recently added two new facilities located in Portage, Indiana and
Rockport, Indiana. These facilities combined will produce over 60,000 tons
of iron oxide per year. The Rockport facility will include a revolutionary
solvent extraction process, enabling production of ultra-high purity iron
oxide containing less than 400 PPM of combined contaminants (excluding
chloride). AMROX is also developing several facilities outside the
continental US. Additionally, ISSI (the parent company of AMROX) owns and
operates the following acid recycling facilities: Re-Gen, Inc. (Warren,
OH), MII (Burns Harbor, IN), SAMROX (Argentina), ISSI - France, and INDROX
(India). ISSI also operates an acid recycling facility located in Monclova,
Coahuila, Mexico.
AMROX is well positioned to service the current and future iron oxide
supply and demand requirements in the global marketplace. AMROX is
positioned to become the largest iron oxide producer in the USA, and
possibly throughout the world. AMROX worldwide production capacity is
expected to exceed 75,000 metric tons per year. AMROX understands the
importance of meeting the needs of its clients, and is at the forefront of
technological development. The technology utilized at the AMROX facilities
will allow client's requirements to be satisfied well into the next
century.
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