Although demolition on construction sites is usually selective, in practice it is often the case that stone rubble taken to sorting centers is still contaminated with residues of wood, plastic and other construction waste. In order to produce high-quality mixed or concrete aggregates, it is essential to carefully remove these unwanted materials.
Screened and cleaned mixed rubble
With the WS 1400 windshifter, this is no longer a problem. The operating principle of a windshifter, also called a wind sifter, uses controlled air pressure. A precisely directed airflow applied to the contaminated input material causes the lighter fractions to be blown away from the heavier fractions, such as stone or concrete rubble, which are then collected in a separate discharge container.
Om daarbij een goed resultaat te bekomen dient het te behandelen materiaal eerst te worden gezeefd met een vlakdekzeefmachine zodat de fijne fractie volledig is verwijderd. Dit is absoluut noodzakelijk omdat deze zandfractie anders mede zou worden uitgeblazen met de restfractie. Het doel is om de lichte afvalfractie zo licht mogelijk te houden om de afvoerkosten hiervan zo laag mogelijk te houden.
Therfore, to efficiently wind sift, it is absolutely necessary to supply the machine with perfectly screened input material.
The process starts by extracting the soil, specifically the 0/20 mm fractions and the oversize fraction 60 mm and above, from the material stream. The 20/56 mm intermediate fraction then undergoes separation by a wind sifter, separating the light waste fraction from the stones. The final result is a 100% pure 20/56 mm stone fraction.
