Dust & Air Emissions
Even more than air emissions, dust remains a key area of concern with our stakeholders and neighbouring communities. Not satisfied with simply meeting local regulations, Aperam aims to achieve a 12% reduction in the intensity of ducted dust over 2015 levels.
> In the effort to reduce our dust, our two Belgian melting shops have led the way. Both developed what are now best-in-class routines for achieving the most efficient management of dust emissions – routines that are continuously improving our total dust emissions.
> Following this success, other Aperam units are starting to apply similar best practices in dust diffusion. For example, our Timoteo unit, our largest unit and the only one using blast furnaces, represents nearly 90% of Aperam’s total dust emissions. Because the unit has replaced the use of coke with environmentally-friendly charcoal, which is lighter and easily blown by the wind, dust containment is particularly challenging.
>To overcome this challenge, new upgrades were required. In 2017, the efficiency of several dedusting systems was enhanced thanks to the upgrade of motors and the ordering and installation of thousands of new filtering bags. The unit also completely covered its charcoal conveyors, replaced clogged and leaking ducts and increased maintenance on the blast furnaces’ dedusting installation.
Looking ahead, the unit plans to further revamp the installations, implement online monitoring and ensure better preventive maintenance.
> Likewise, our Imphy unit is working to reduce diffused dust though enhanced capturing. In 2017, the unit installed a ducting hood for the fumes emitted by the casting ladle. The collected dust is channelled through bag filters before going to Recyco for recycling. In the near future, the unit plans to do its ducting at the oxycuting station, along with confine some operations and repair existing leakages. Already, the unit has seen a 10% decrease in absolute value.
As a result of initiatives like these, Aperam has achieved a significant reduction in our dust emissions – even in times of increased production. Our total emissions consolidated using regulatory methodologies indicate a -38% reduction, with 343 tons emitted (ducted and part of diffused), which is a 151 g/t cs in intensity.
Although this figure is partially the result of conjunctural events, we believe that our dust emissions have been significantly reduced thanks to the action plans happening at our various plants. This encourages us to continue our efforts to consistently exceed our targeted reduction levels.