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Vitrification
Vitrification means that a material is changed and bound into a glass-like and non leaching substance (vitrified slag).
The organic material and volatile components that are not gasified in the VitroArc and the PyroArc process are melted. In the PyroArc process, the rest is melted to form a metal phase and a leach resistant vitrified slag. In the VitroArc process the melted residue forms a leach resistant vitrified slag.
Through vitrification, potential inorganic pollutants are fixed in the glass-like substance that makes them resistant to leaching. The leach resistant slag is by this transformation converted into a commercial commodity that can be used, for example, as a construction material.
The environmental authorities in Europe and the US have imposed strict regulations with regard to leachability and have developed comprehensive analyzing procedures for testing leachability. EnviroArc has tested the leachability of the vitrified slag, both from the PyroArc and VitroArc processes, and the results show that the leachability is well within the requirements.
A typical slag composition from the PyroArc process is shown in the table below:
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