EAF dust from steel foundries

The composition of the furnace dust primarily depends on the steel grade being produced. For instance, low alloy steels will not generate emissions containing chromium or nickel, whereas stainless steel will. Another important factor is scrap quality. Melting galvanised steel scrap leads to significant emissions of zinc oxide. 

The application of an appropriate hooding of the furnace allows the capture of up to 98 % of the furnace dust. The captured exhaust gas is then cleaned, usually using a bag filter. This reduces dust emission levels to below 10 mg/Nm.  

Emission data for the main combustion gas components are given in Table 3.10. Inventory data 

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Table 3.9 Chemical composition of EAF dust from steel foundries [32, CAEF, 1997]...

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