Wet sand regeneration

The process mainly aims to lower both the oolitisation degree of used sand (LOI max. 1 %) and the acid content. 

Reduction of the amount of sand for disposal and of the consumption of new primary sand. Cross-media effects 

The wet process generates a sludge for disposal and a waste water stream. A serious problem of this waste water flow is the bad sedimentation of bentonite, and its difficult removal out of waste water. Waste water from water glass sands regeneration shows the presence of alkaline ions. These ions are difficult to separate from the waste water. 

Within the Italian foundry market, a centralised wet regeneration plant can offer regenerated sand at a price lower than that of new sand. 

This system is reported to be able to cope with changes in used sand quality better than mechanical or thermal processes. This makes it suitable when considering a centralised sand regeneration plant. 

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