Refuse Derived Fuels
Million of tons of waste are produced in the world every day. While the main sources are the industrialized nations, the amount of waste is increasing in emerging economies as well. ANDRITZ Recycling supplies ecologically and economically viable solutions for this deluge of waste.
ANDRITZ employs technologies that combine pre-shredding, post-shredding, sorting, and drying so that the entire flow of waste can be separated into organic and inorganic components.
Valuable fractions, such as metals, can be removed early in the process and appropriately recycled. The metal fraction, often with plastics or textiles still adhering to it, can be cleaned. Composite materials can be broken down with the ADuro QZ shredder. In the end, the steel scrap and non-ferrous metals can be recovered with a superior purity of 98% – perfect for use in the steel industry or re-processing in foundries.
With minor additional processing, the non-recyclable residual fractions often have a high calorific value making them suitable as a fuel source for cement kilns, steel industry boilers, or for co-firing in power plants.
- Household waste
- Industrial waste
- Bulky waste
- Production residues
- Ferrous fraction
- Non-ferrous fraction
MSW and C&I waste contain many different materials that need to be separated mechanically into a high- and a low-calorific fraction. This process involves shredding, screening and classifying of the material. Metals, inerts and organics are removed; light fractions with high-calorific value (e.g. plastics, textile and paper) remain. The RDF fraction could be used in the cement industry, steel furnaces or power stations, substituting coal and oil.
In order to optimize the output quality shredding can be combined with
Sorting and separation
- according to size and form: drum screening, 3D-screens, fine screens
- according to weight and form: air separation, ballistic separation
- according to special material properties: ferrous metals, non-ferrous metals, optical separation of pre-defined fractions, e.g. plastics/PVC,
- wood, glass
- Thermal drying (belt dryer, drum dryer)
- The result is a homogeneous refuse derived fuel.