Steel making costs are heavily influenced by the cost of dealing
with by-products, including zinc- and lead-containing flue dust.
Traditionally, this dust has had to be transported away for zinc
and lead recovery.
Using a new state-of-the-art injection technique, two furnace operators
and an R&D group have developed a dust recycling system to be
integrated into the electrical arc furnace process. The new system,
which has now been fully implemented at both production sites, allows
improved zinc recovery and a reduction in the amount of dust that
has to be sent away for processing. The results represent an important
step on the way to better environmental compatibility of European
One of the industrial operators has already teamed up with a process
engineering subsidiary to exploit the process commercially via sales
of hardware modifications and consulting support in furnace locations
where newer more vigorous environmental constraints are in effect.
Partners credit European funding and a remarkable collaboration
between the industrial and research partners for the project's success.