Ash from waste incineration
Recovering the best of the rest
Ash from waste incineration plants consists of sintered combustion products, mineral components, metal scrap and other unburnt materials.
For the treatment of incinerator bottom ash, either the original ash in its non-pretreated form can be used as the input material, or the sorted but contaminated metal fraction. BHS plant technology makes it possible in both cases to recover the ferrous and non-ferrous metals present and separate them into desired metal fractions with a high degree of purity. Using BHS crushing machines, the metals are selectively separated, freed from adhesions, dry cleaned and partially shaped into balls. This makes it possible to sort the different cleaned ferrous and non-ferrous metal fractions reliably and is an important prerequisite for marketing them attractively.
Depending on the application and specific goals, different BHS machines are used:
- Rotorshredder (type RS)
- Rotor centrifugal crusher (type RSMX)
- Rotor impact mill (type RPMV)
The machines are primarily selected on the basis of the maximum particle sizes in the input material. Tests can be carried out in our technical center to facilitate the final selection and design of the suitable machine type.
Treatment of presorted but contaminated ferrous scrap from waste incineration plants
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Treatment of a presorted non-ferrous fraction from waste incineration plants
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Subsequent classification of the treated non-ferrous fraction into > 3.0 mm (left) and < 3.0 mm (right). The larger fraction contains the metals, while the remaining fraction consists of the mineral components.
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