Trockenentstaubung, Staubrückführung und Abgaswärmenutzung in Schmelzreduktionsanlagen

This thesis investigates the possibilities to replace the current wet dedusting of the Corex-Topgas which causes a lot of sludge (with a difficult further processing and an expensive disposal) with a dry dedusting system. Moreover it aims at a sensible heat-utilization of the Corex-Topgas. An application of a dry dedusting system allows to recirculate the dust, which contains high amounts of iron oxides (FeO and Fe2O3) into the process, e.g. into the melter gasifier. There are basically two alternatives for the dry dedusting system, either a dedusting process with a cyclone and an electrostatic precipitator with an additional utilization of the sensible heat or an utilization of the sensible heat between the cyclone and the electrostatic precipitator. In both cases the required cleangasconditions, a maximum particle diameter of 5 micrometer as well as a maximum dust load of 5 mg/cubicmeter (STP), can be reached.