Raw Material Extraction

Depending on the composition of your grate ash, up to 80 % of the dry mass can be processed into recyclable materials using the IRRT process. Not only the quantity, but also the quality of the recovered materials is impressive. Instead of ending up as a simple substitute building material in road construction, the recyclable materials can be directly commercialised as high-quality raw materials.

The mineral products with IRRT not only fulfil the requirements of the REACH Regulation, but also those of the chemicals and products legislation (ECHA). This means that they clearly outperform products from conventional processing methods. The end products are therefore fully-fledged raw materials and not inferior substitute building materials.

The process works exclusively with fresh slag, eliminating the need for costly storage for carbonation or ageing. The compact design of the processing plant also saves space and costs.

The minerals are treated using high-frequency ultrasonic cleaning. The washing water is kept in circulation for at least eight processes. This enables a water to solids ratio of 0.3:1 to be achieved – in conventional processes this is 5:1. A washing process takes less than a minute. In addition, our process does not require particularly high-quality water, but only small quantities of fresh water. This helps to avoid rising water prices in the region and conserve resources.

Thanks to the high processing rate, on average only 350 kg of 1,000 kg of dry matter remains as landfill residue after treatment. This makes a significant contribution to proloning the lifespan of landfill sites and reducing disposal costs.

The residues to be landfilled are reduced to a fine fraction containing pollutants and process water sludge. If the two are mixed together, solidification occurs. This firmly binds the pollutants (pollutant sink) and fulfils the strict requirements for DK-1 landfill.

The recovery of the metals alone is already sufficient to make the process economical. The process step can therefore even be implemented individually. The recovery of glass and stone further increases the yield. The cost-effectiveness of the process enables an estimated return on investment within less than 48 months.