External sales of by-products
It is not viable to recirculate all the material in steel production. In some cases, new revenue streams are created by processing material into by-products to be sold externally or used as products or raw materials in customer's applications and processes.
For example, blast furnace slag is sold to the road construction, agriculture and cement industries. An average of one third of the residuals from the ore-based steel production was processed into by-products and sold externally.
Waste management and landfillThere are residuals from production processes for which there is no current environmentally or economically viable application. These residuals must therefore be removed from the processing cycle. At SSAB, this type of waste includes flue gas sludge that cannot be utilized due to its physical and chemical properties. Management and monitoring of the company’s landfill sites are strictly regulated by the law and government authorities. Deposited waste must be handled in such a way that these resources, too, might be utilized in the future. We are continuously developing methods to utilize the materials which currently are landfilled. The target is to increase the utilization rate by 50 000 tonnes a year by the end of 2020 compared to the 2014 level. SSAB Americas does not own or operate waste transportation equipment or landfills, and deals only with government-approved landfills. Before waste is classified as landfill material, thorough testing and classification is carried out by a specialized third party contractor.