Pre-Treatment of MSWI fly ash for useful application

摘要: At TNO a feasibility study has been carried out into the possibilities of removing number easily leachable elements from MSWI fly ash. The aim this was to find way useful application ash (after treatment) as road base construction material. A combination slight washing step and stabilization/solidification with cement other additives appeared be convenient meet severe standards Dutch Building Materials Decree. removes more than 90% cadmium chloride that were originally present. Over 50% zinc sulphate are removed. remaining solid material (approximately 70% original quantity) could processed bound foundation layer, adding some 20% additives. leaching characteristics stabilized most future Decree in Netherlands. This means may applied without any provisions. In contrast, but unwashed not even less standards. global cost estimate shows that, at least for situation, processing costs (washing, liquor stabilization) equal disposal