Description
The i-Meltor furnace is a melting reactor based on a 3-phase AC
conventional electric arc furnace and adapted for working in
multi-step processes such as reducing, fuming, melting, refining
and settling.
The principle of the process is to recover metals contained in
the feed in form of:
y dust, mainly composed of volatile elements such as zinc, lead,
silver, etc. in form of oxides,
y hot metal such as pig iron, ferroalloys or copper metal,
and to produce inert slag.
i-Meltor
` is a specially designed electrical arc furnace with top
central feeding and bottom inert gas stirring,
` allows rapid reduction / smelting / fuming / refining as well
as smooth settling,
` provides a high power rate (more than 1 MW / m2).
Water-sprayed staves increase the refractory life-time in the
slag area.
Usually, the i-Meltor unit is placed on a mobile car for an easy
lower shell exchange, when maintenance is necessary.
i-Meltor can be combined with different furnaces…
...for treating high zinc-containing by-products (>5 %
Zn)
PRIMUS®
The Primus technology consists in a two-step proc-ess:
` drying, heating, pre-reduction in a Multiple Hearth
Furnace
` final reduction, fuming and melting in an i-Meltor
The Primus process has been industrially imple-mented at
ArcelorMittal Woiver (ex Primorec) in Luxembourg and at Dragon
Steel in Taiwan.
...for treating by-products from integrated steel plants (
Environmental Technologies – Residue Treatment
EAF dust
By-passing a preliminary step means that drying and
pre-reduction have to be done in one single i-Meltor together with
complete reduction and melting. Such a configuration is an optimal
solu-tion when processing small volumes (less than 60 ktpa) of EAF
dust with high zinc content and in case the energy cost is not that
expensive.
Stainless steel dust
The richer the dust content is in terms of valu-able metals, the
better i-Meltor will fit any opera-tor’s objectives. This is the
case when treating dust generated by the Stainless Steel industry
for recovering nickel and chromium.
Spent catalysts
After several regeneration cycles, petrochemical catalysts have
no other use than being recycled. In i-Meltor, such catalysts can
be melted and generated ferroalloys can be de-sulphurized and
de-phosphorized for producing valuable metals such as Mo and Ni
with a high recovery yield.
Copper slag
Thanks to its flexible stirring, i-Meltor is well adapted for
recovering a maximum of copper from the copper slag generated by
copper smelters and converters. The remaining copper contained in
the final slag does not exceed 0,5 % (in place of 0,8 -1,5 %
obtained with most of the traditional processes). The final product
is copper metal instead of matte produced by conventional copper
slag cleaning technology.
Waelz slag
Usually, the final slag, resulting from EAF dust processing by a
Waelz process, does not only contain iron, but also small amounts
of hazard-ous components. Disposing such a slag is more difficult
and expensive because of its “non-inert” status. Reprocessing this
slag in an i-Meltor allows the recovery of hot metal and an inert
slag which can be used for road construction or embankment. Thanks
to the high de-zincing abil-ity of i-Meltor, a better operating
balance can be reached between the kiln and i-Meltor, resulting in
an improved total recovery of zinc.
i-Meltor, a multi-purpose reactor for processing
ZnO
Inert slag Hot metal
i-Meltor applied to Waelz slag
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VCA**CERT
IF
IED SAFETY SYSTEM
VINCOTTE
ISO 9001ISO 14001
BUREAU VERITASCertification
N° BXL 05000141 / N° BEL BXL 153669
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