According to the contractors on the project, Danieli Environment and electric arc furnace equipment maker MORE, the system sops up dioxins and other highly volatile heavy metals by injecting powdered adsorbents, such as activated carbon or pulverized activated lignite coke, into the furnace exhaust ducts.

The particulates are then collected by the dust abatement system and disposed of.

“Powdered activated adsorbents technology is a technically and commercially proven approach to reduce dioxins and mercury emissions in steel and power plants. By dosing and pneumatically injecting powder activated coal (or lignite) inside the fume duct, is it possible to aggregate the dioxins molecules thanks to the high affinity with carbon,” the companies said in a statement.  

The turnkey project included installation of two storage silos with independent dosing units; two injection systems, one for each exhaust fume line; and related piping.

Acciaierie Bertoli Safau is Danieli’s steelmaking arm and produces a wide range of engineering special steels.