Challenge Recycling - Possibilities by Use of Agglomeration Processes

Abstract

Increasingly pelletizing discs are used for the recycling of dust and sludge. The applied pellet feed is highly variable, for example in terms of chemical composition, grain size distribution and raw density. These raw materials related factors lead to a destabilized pelletizing process, which initially must be homogenized through special mixtures, as well as the use of binders or additives. There are many possibilities to reach stringent restriction of material related target factors. On the one hand it is helpful to be flexible by changing the process parameters of the pelletizing disc. On the other hand, it is necessary to use a material-binder-formulation, which leads to a highly stable pelletizing process. The paper deals with an example of the use of agglomerating device, pelletizing disc, to prepare different dusts and sludges for material recycling. These dusts und sludges are mostly generated in metallurgical processes, e.g. sinterplant, blast furnace and steelworks.