Alternative reducing agents in metallurgical processes: Shredder Residue Material

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Ir Samira Lotfian, Hesham Ahmed, Caisa Samuelsson

Shredder residue material is a plastic containing residue material after separation of main ferrous and non-ferrous fractions. The amount of SRM is increasing steadily and the issue of its sustainable disposal management has risen. One solution is to utilize this material as a reductant in metallurgical processes. As the first step, the thermal decomposition characteristic of SRM needs to be studied and compared with the properties of current reducing agents, such as coal. In this study devolatilization characteristics of SRM sample and gasification of SRM char is compared to that of coal sample using thermogravimetric analysis. It was observed that SRM contains higher amount of volatiles, while coal contains higher fixed carbon. The volatile matter of SRM consists of compounds such as H2, CO and hydrocarbons, which are known to have reduction potential. Moreover, the activation energy for gasification of SRM char is lower than that of coal char.

Diese Kategorie durchsuchen: General Pyrometallurgy