proCLIRProduct Manufacturing
IRRT® Process for Slag Treatment
- Up to 65 % material utilisation of waste incineration slag
- High quality of recyclable fractions
- Residual materials can be landfilled according to DK-1 specifications
- Return on investment possible after 48 months
Incinerator bottom ash contains valuable materials. With the IRRT® process, we can reutilise these in exceptional quality and on a large scale. The recovered minerals are even legally recognised as fully-fledged goods and not as inferior substitute building materials.
Modern Incinerator Bottom Ash Processing
Recovery of High-Quality Products and Metals
The IRRT® process offers you completely new possibilities in the processing of slag and bottom ash. Large quantities of high-quality ingredients are separated in a cost-efficient manner.
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 products.
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 goods, rather than low-grade substitute construction 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.
Unfold the Potential of your Bottom Ash!
The End Products
You can produce the following marketable end products with IRRT®:
UltraLit®
Certified Aggregate
The mineral content in the slag is processed several times and is so pure that you can replace a large proportion of the primary aggregate in the concrete. The certified aggregate even fulfils the requirements of EU-VO 2024/3110 and DIN EN 12620.
UltraSilit®
High-Purity Glass
Once the bottom ash has been treated, glass particles are removed in a final step using optical sorting machines. Thanks to their equally high purity, they can be used directly for the production of foam glass.
Metal Recovery
Ferrous
Metals
They can recover the majority of ferrous metals, including stainless steels in directly smeltable quality.
Non-Ferrous Metals
A high percentage of non-ferrous metals can also be separated – this even applies to aluminium, which decomposes in other processes.
Are You Interested? Then Have Your Incinerator Bottom Ash Tested Now for the Recyclable Materials It Contains.
The Process
The IRRT® process, specifically developed for the targeted recovery of products from incinerator bottom ash, takes a new approach to mechanical processing. Proven technologies are combined with new methods and processes.
More About the Process
