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Paper and cardboard are typically separated from one another early in the recycling process, after which they will continue their journey apart. Clean materials are treated in their own way, and dirty materials reduced to an optimal size and shape for energy use.
Shredding accelerates material flow and speeds up screening and sorting.
Increased energy output
Waste reduced to a homogenous grain size generates more energy by combustion.
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Accelerating paper and cardboard recycling process
The life-cycle of paper and cardboard does not end after they are used once. When clean and dry enough, both be used as raw materials for new paper and cardboard.
Dirty paper and cardboard, in turn, are utilized as part of waste fuels such as refuse derived fuel (RDF) and solid recovered fuel (SRF). The energy efficiency of both materials can be improved by reducing them to the right grain size for easier processing and more efficient combustion.
Pre-shredded paper and cardboard are easier to screen and separate from each other and other materials. In energy production, optimal grain size enables maximum energy generation by combustion.
Metso’s pre-shredders and fine shredders reduce the size of paper and cardboard for further processing. In many cases, waste is first pre-shredded for screening and sorting, and then finely shredded for energy use, but processes vary depending on the nature of the waste and required applications.
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