首页|Reducing Dioxin Emissions in Electric Steel Mills
Reducing Dioxin Emissions in Electric Steel Mills
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NSTL
During the production of steel in electric arc furnaces, dioxins and furans are produced, depending on the scrap quality, which call for further waste gas cleaning. In view of the waste gas flow dimension to be treated (mostly 1 mill. m~3/h) and this industrial sector's sensitivity to investments, waste gas cleaning processes are needed which permit technically efficient and still economically justified environmental protection. Adsorptive waste gas cleaning using Activated Lignite HOK in an entrained phase process, the so-called entrained-phase technology, constitutes one of the simplest and at the same time lowest-cost cleaning steps. Successful application of the HOK technology in five European electric steel mills has proven that process-integrated adsorption based on Activated Lignite HOK allows reliable pollutant reduction to dioxin and furan concentrations below 0.1 ngTE/m~3 to be achieved even for large waste gas flows. Dioxin reduction is implemented with comparatively low out-lays as entrained-phase adsorption is integrated into the existing waste gas dust separation system. This integrated environmental technology was developed to a major extent by RWE Power AG (formerly Rheinbraun AG) which has decades of experience in the application of activated lignite for waste gas cleaning.
NSTL
