Air emissions

Our production processes generate air emissions both via stack and as fugitive emissions. Stable production processes and preventive maintenance of process equipment is key in avoiding both fugitive and stack dust releases.

To minimize stack emissions, all large point sources are equipped with filters. Local environmental control programmes typically include monitoring emissions such as nitric oxides (NO_x), sulphur oxides (SO_x), metals to air, and other substances of concern, depending on the nature of the process.

To prevent fugitive emissions, raw materials and products (metal powders) are handled in closed processes whenever possible. In-house storages and sealed transport ­containers of materials are used to prevent particles from spreading. However, the site in Höganäs, Sweden, bulk transports by ship where unloading must be done in the open.

Slag handling, including sorting and transporting to internal landfill, is generally carried out in open air at all slag production sites. Special procedures including watering, road sweeping, landfill covers, etc, are used to minimize emissions from the open handling. A combination of paved roads and working areas, and a programme for keeping the sites clean at all times, minimises secondary dust emissions.

Read more about our GHG emissions