shall be next level question after 'How to start to create a report with WF-RepTool?' - questions on creating a report
You may use the WF-RepTool like for waste fractions - choose the name of the OUTPUT fraction (e.g. iron fraction 'pure'), choose the 'intended final technology' (e.g. steel mill) and provide the composition data like for other fractions (e.g. Fe > 100 %), the 'use in final technology' will be the same like for other iron fractions (Fe > Fe recovery) and it will be automatically classified (R = recycling for this case).
Hint: you may use the term 'end-of-waste' under the name of the acceptor, by doing this you may sum up all OUTPUT fractions having reached the 'end-of-waste' criteria in e.g. the 'Analyze' option.